/*********************************************************************
 *
 * $Id: yocto_display.cs 56058 2023-08-15 07:38:35Z mvuilleu $
 *
 * Implements yFindDisplay(), the high-level API for Display functions
 *
 * - - - - - - - - - License information: - - - - - - - - -
 *
 *  Copyright (C) 2011 and beyond by Yoctopuce Sarl, Switzerland.
 *
 *  Yoctopuce Sarl (hereafter Licensor) grants to you a perpetual
 *  non-exclusive license to use, modify, copy and integrate this
 *  file into your software for the sole purpose of interfacing
 *  with Yoctopuce products.
 *
 *  You may reproduce and distribute copies of this file in
 *  source or object form, as long as the sole purpose of this
 *  code is to interface with Yoctopuce products. You must retain
 *  this notice in the distributed source file.
 *
 *  You should refer to Yoctopuce General Terms and Conditions
 *  for additional information regarding your rights and
 *  obligations.
 *
 *  THE SOFTWARE AND DOCUMENTATION ARE PROVIDED "AS IS" WITHOUT
 *  WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING
 *  WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY, FITNESS
 *  FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO
 *  EVENT SHALL LICENSOR BE LIABLE FOR ANY INCIDENTAL, SPECIAL,
 *  INDIRECT OR CONSEQUENTIAL DAMAGES, LOST PROFITS OR LOST DATA,
 *  COST OF PROCUREMENT OF SUBSTITUTE GOODS, TECHNOLOGY OR
 *  SERVICES, ANY CLAIMS BY THIRD PARTIES (INCLUDING BUT NOT
 *  LIMITED TO ANY DEFENSE THEREOF), ANY CLAIMS FOR INDEMNITY OR
 *  CONTRIBUTION, OR OTHER SIMILAR COSTS, WHETHER ASSERTED ON THE
 *  BASIS OF CONTRACT, TORT (INCLUDING NEGLIGENCE), BREACH OF
 *  WARRANTY, OR OTHERWISE.
 *
 *********************************************************************/


using System;
using System.Collections;
using System.Collections.Generic;
using System.Runtime.InteropServices;
using System.Diagnostics;
using System.Text;
using YDEV_DESCR = System.Int32;
using YFUN_DESCR = System.Int32;


#pragma warning disable 1591
//--- (generated code: YDisplayLayer class start)
/**
 * <summary>
 *   Each <c>DisplayLayer</c> represents an image layer containing objects
 *   to display (bitmaps, text, etc.).
 * <para>
 *   The content is displayed only when
 *   the layer is active on the screen (and not masked by other
 *   overlapping layers).
 * </para>
 * <para>
 * </para>
 * </summary>
 */
public class YDisplayLayer
{
//--- (end of generated code: YDisplayLayer class start)

    private YDisplay _display  = null;
    private int      _id = -1;
    private string   _cmdbuff  = "";
    private bool     _hidden = false;

    //--- (generated code: YDisplayLayer definitions)

    public enum ALIGN
    {
        TOP_LEFT = 0,
        CENTER_LEFT = 1,
        BASELINE_LEFT = 2,
        BOTTOM_LEFT = 3,
        TOP_CENTER = 4,
        CENTER = 5,
        BASELINE_CENTER = 6,
        BOTTOM_CENTER = 7,
        TOP_DECIMAL = 8,
        CENTER_DECIMAL = 9,
        BASELINE_DECIMAL = 10,
        BOTTOM_DECIMAL = 11,
        TOP_RIGHT = 12,
        CENTER_RIGHT = 13,
        BASELINE_RIGHT = 14,
        BOTTOM_RIGHT = 15
    };
    //--- (end of generated code: YDisplayLayer definitions)

    public YDisplayLayer(YDisplay parent, int id)
    {
        this._display = parent;
        this._id = id;
        //--- (generated code: YDisplayLayer attributes initialization)
        //--- (end of generated code: YDisplayLayer attributes initialization)
    }

    //--- (generated code: YDisplayLayer implementation)



    /**
     * <summary>
     *   Reverts the layer to its initial state (fully transparent, default settings).
     * <para>
     *   Reinitializes the drawing pointer to the upper left position,
     *   and selects the most visible pen color. If you only want to erase the layer
     *   content, use the method <c>clear()</c> instead.
     * </para>
     * </summary>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int reset()
    {
        this._hidden = false;
        return this.command_flush("X");
    }


    /**
     * <summary>
     *   Erases the whole content of the layer (makes it fully transparent).
     * <para>
     *   This method does not change any other attribute of the layer.
     *   To reinitialize the layer attributes to defaults settings, use the method
     *   <c>reset()</c> instead.
     * </para>
     * </summary>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int clear()
    {
        return this.command_flush("x");
    }


    /**
     * <summary>
     *   Selects the pen color for all subsequent drawing functions,
     *   including text drawing.
     * <para>
     *   The pen color is provided as an RGB value.
     *   For grayscale or monochrome displays, the value is
     *   automatically converted to the proper range.
     * </para>
     * </summary>
     * <param name="color">
     *   the desired pen color, as a 24-bit RGB value
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int selectColorPen(int color)
    {
        return this.command_push("c"+String.Format("{0:x06}",color));
    }


    /**
     * <summary>
     *   Selects the pen gray level for all subsequent drawing functions,
     *   including text drawing.
     * <para>
     *   The gray level is provided as a number between
     *   0 (black) and 255 (white, or whichever the lightest color is).
     *   For monochrome displays (without gray levels), any value
     *   lower than 128 is rendered as black, and any value equal
     *   or above to 128 is non-black.
     * </para>
     * </summary>
     * <param name="graylevel">
     *   the desired gray level, from 0 to 255
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int selectGrayPen(int graylevel)
    {
        return this.command_push("g"+Convert.ToString(graylevel));
    }


    /**
     * <summary>
     *   Selects an eraser instead of a pen for all subsequent drawing functions,
     *   except for bitmap copy functions.
     * <para>
     *   Any point drawn using the eraser
     *   becomes transparent (as when the layer is empty), showing the other
     *   layers beneath it.
     * </para>
     * </summary>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int selectEraser()
    {
        return this.command_push("e");
    }


    /**
     * <summary>
     *   Enables or disables anti-aliasing for drawing oblique lines and circles.
     * <para>
     *   Anti-aliasing provides a smoother aspect when looked from far enough,
     *   but it can add fuzziness when the display is looked from very close.
     *   At the end of the day, it is your personal choice.
     *   Anti-aliasing is enabled by default on grayscale and color displays,
     *   but you can disable it if you prefer. This setting has no effect
     *   on monochrome displays.
     * </para>
     * </summary>
     * <param name="mode">
     *   <c>true</c> to enable anti-aliasing, <c>false</c> to
     *   disable it.
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int setAntialiasingMode(bool mode)
    {
        return this.command_push("a"+(mode?"1":"0"));
    }


    /**
     * <summary>
     *   Draws a single pixel at the specified position.
     * <para>
     * </para>
     * </summary>
     * <param name="x">
     *   the distance from left of layer, in pixels
     * </param>
     * <param name="y">
     *   the distance from top of layer, in pixels
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int drawPixel(int x, int y)
    {
        return this.command_flush("P"+Convert.ToString(x)+","+Convert.ToString(y));
    }


    /**
     * <summary>
     *   Draws an empty rectangle at a specified position.
     * <para>
     * </para>
     * </summary>
     * <param name="x1">
     *   the distance from left of layer to the left border of the rectangle, in pixels
     * </param>
     * <param name="y1">
     *   the distance from top of layer to the top border of the rectangle, in pixels
     * </param>
     * <param name="x2">
     *   the distance from left of layer to the right border of the rectangle, in pixels
     * </param>
     * <param name="y2">
     *   the distance from top of layer to the bottom border of the rectangle, in pixels
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int drawRect(int x1, int y1, int x2, int y2)
    {
        return this.command_flush("R"+Convert.ToString(x1)+","+Convert.ToString(y1)+","+Convert.ToString(x2)+","+Convert.ToString(y2));
    }


    /**
     * <summary>
     *   Draws a filled rectangular bar at a specified position.
     * <para>
     * </para>
     * </summary>
     * <param name="x1">
     *   the distance from left of layer to the left border of the rectangle, in pixels
     * </param>
     * <param name="y1">
     *   the distance from top of layer to the top border of the rectangle, in pixels
     * </param>
     * <param name="x2">
     *   the distance from left of layer to the right border of the rectangle, in pixels
     * </param>
     * <param name="y2">
     *   the distance from top of layer to the bottom border of the rectangle, in pixels
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int drawBar(int x1, int y1, int x2, int y2)
    {
        return this.command_flush("B"+Convert.ToString(x1)+","+Convert.ToString(y1)+","+Convert.ToString(x2)+","+Convert.ToString(y2));
    }


    /**
     * <summary>
     *   Draws an empty circle at a specified position.
     * <para>
     * </para>
     * </summary>
     * <param name="x">
     *   the distance from left of layer to the center of the circle, in pixels
     * </param>
     * <param name="y">
     *   the distance from top of layer to the center of the circle, in pixels
     * </param>
     * <param name="r">
     *   the radius of the circle, in pixels
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int drawCircle(int x, int y, int r)
    {
        return this.command_flush("C"+Convert.ToString(x)+","+Convert.ToString(y)+","+Convert.ToString(r));
    }


    /**
     * <summary>
     *   Draws a filled disc at a given position.
     * <para>
     * </para>
     * </summary>
     * <param name="x">
     *   the distance from left of layer to the center of the disc, in pixels
     * </param>
     * <param name="y">
     *   the distance from top of layer to the center of the disc, in pixels
     * </param>
     * <param name="r">
     *   the radius of the disc, in pixels
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int drawDisc(int x, int y, int r)
    {
        return this.command_flush("D"+Convert.ToString(x)+","+Convert.ToString(y)+","+Convert.ToString(r));
    }


    /**
     * <summary>
     *   Selects a font to use for the next text drawing functions, by providing the name of the
     *   font file.
     * <para>
     *   You can use a built-in font as well as a font file that you have previously
     *   uploaded to the device built-in memory. If you experience problems selecting a font
     *   file, check the device logs for any error message such as missing font file or bad font
     *   file format.
     * </para>
     * </summary>
     * <param name="fontname">
     *   the font file name, embedded fonts are 8x8.yfm, Small.yfm, Medium.yfm, Large.yfm (not available on
     *   Yocto-MiniDisplay).
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int selectFont(string fontname)
    {
        return this.command_push("&"+fontname+""+((char)(27)).ToString());
    }


    /**
     * <summary>
     *   Draws a text string at the specified position.
     * <para>
     *   The point of the text that is aligned
     *   to the specified pixel position is called the anchor point, and can be chosen among
     *   several options. Text is rendered from left to right, without implicit wrapping.
     * </para>
     * </summary>
     * <param name="x">
     *   the distance from left of layer to the text anchor point, in pixels
     * </param>
     * <param name="y">
     *   the distance from top of layer to the text anchor point, in pixels
     * </param>
     * <param name="anchor">
     *   the text anchor point, chosen among the <c>YDisplayLayer.ALIGN</c> enumeration:
     *   <c>YDisplayLayer.ALIGN.TOP_LEFT</c>,         <c>YDisplayLayer.ALIGN.CENTER_LEFT</c>,
     *   <c>YDisplayLayer.ALIGN.BASELINE_LEFT</c>,    <c>YDisplayLayer.ALIGN.BOTTOM_LEFT</c>,
     *   <c>YDisplayLayer.ALIGN.TOP_CENTER</c>,       <c>YDisplayLayer.ALIGN.CENTER</c>,
     *   <c>YDisplayLayer.ALIGN.BASELINE_CENTER</c>,  <c>YDisplayLayer.ALIGN.BOTTOM_CENTER</c>,
     *   <c>YDisplayLayer.ALIGN.TOP_DECIMAL</c>,      <c>YDisplayLayer.ALIGN.CENTER_DECIMAL</c>,
     *   <c>YDisplayLayer.ALIGN.BASELINE_DECIMAL</c>, <c>YDisplayLayer.ALIGN.BOTTOM_DECIMAL</c>,
     *   <c>YDisplayLayer.ALIGN.TOP_RIGHT</c>,        <c>YDisplayLayer.ALIGN.CENTER_RIGHT</c>,
     *   <c>YDisplayLayer.ALIGN.BASELINE_RIGHT</c>,   <c>YDisplayLayer.ALIGN.BOTTOM_RIGHT</c>.
     * </param>
     * <param name="text">
     *   the text string to draw
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int drawText(int x, int y, ALIGN anchor, string text)
    {
        return this.command_flush("T"+Convert.ToString(x)+","+Convert.ToString(y)+","+((int)(anchor)).ToString()+","+text+""+((char)(27)).ToString());
    }


    /**
     * <summary>
     *   Draws a GIF image at the specified position.
     * <para>
     *   The GIF image must have been previously
     *   uploaded to the device built-in memory. If you experience problems using an image
     *   file, check the device logs for any error message such as missing image file or bad
     *   image file format.
     * </para>
     * </summary>
     * <param name="x">
     *   the distance from left of layer to the left of the image, in pixels
     * </param>
     * <param name="y">
     *   the distance from top of layer to the top of the image, in pixels
     * </param>
     * <param name="imagename">
     *   the GIF file name
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int drawImage(int x, int y, string imagename)
    {
        return this.command_flush("*"+Convert.ToString(x)+","+Convert.ToString(y)+","+imagename+""+((char)(27)).ToString());
    }


    /**
     * <summary>
     *   Draws a bitmap at the specified position.
     * <para>
     *   The bitmap is provided as a binary object,
     *   where each pixel maps to a bit, from left to right and from top to bottom.
     *   The most significant bit of each byte maps to the leftmost pixel, and the least
     *   significant bit maps to the rightmost pixel. Bits set to 1 are drawn using the
     *   layer selected pen color. Bits set to 0 are drawn using the specified background
     *   gray level, unless -1 is specified, in which case they are not drawn at all
     *   (as if transparent).
     * </para>
     * </summary>
     * <param name="x">
     *   the distance from left of layer to the left of the bitmap, in pixels
     * </param>
     * <param name="y">
     *   the distance from top of layer to the top of the bitmap, in pixels
     * </param>
     * <param name="w">
     *   the width of the bitmap, in pixels
     * </param>
     * <param name="bitmap">
     *   a binary object
     * </param>
     * <param name="bgcol">
     *   the background gray level to use for zero bits (0 = black,
     *   255 = white), or -1 to leave the pixels unchanged
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int drawBitmap(int x, int y, int w, byte[] bitmap, int bgcol)
    {
        string destname;
        destname = "layer"+Convert.ToString(this._id)+":"+Convert.ToString(w)+","+Convert.ToString(bgcol)+"@"+Convert.ToString(x)+","+Convert.ToString(y);
        return this._display.upload(destname,bitmap);
    }


    /**
     * <summary>
     *   Moves the drawing pointer of this layer to the specified position.
     * <para>
     * </para>
     * </summary>
     * <param name="x">
     *   the distance from left of layer, in pixels
     * </param>
     * <param name="y">
     *   the distance from top of layer, in pixels
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int moveTo(int x, int y)
    {
        return this.command_push("@"+Convert.ToString(x)+","+Convert.ToString(y));
    }


    /**
     * <summary>
     *   Draws a line from current drawing pointer position to the specified position.
     * <para>
     *   The specified destination pixel is included in the line. The pointer position
     *   is then moved to the end point of the line.
     * </para>
     * </summary>
     * <param name="x">
     *   the distance from left of layer to the end point of the line, in pixels
     * </param>
     * <param name="y">
     *   the distance from top of layer to the end point of the line, in pixels
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int lineTo(int x, int y)
    {
        return this.command_flush("-"+Convert.ToString(x)+","+Convert.ToString(y));
    }


    /**
     * <summary>
     *   Outputs a message in the console area, and advances the console pointer accordingly.
     * <para>
     *   The console pointer position is automatically moved to the beginning
     *   of the next line when a newline character is met, or when the right margin
     *   is hit. When the new text to display extends below the lower margin, the
     *   console area is automatically scrolled up.
     * </para>
     * </summary>
     * <param name="text">
     *   the message to display
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int consoleOut(string text)
    {
        return this.command_flush("!"+text+""+((char)(27)).ToString());
    }


    /**
     * <summary>
     *   Sets up display margins for the <c>consoleOut</c> function.
     * <para>
     * </para>
     * </summary>
     * <param name="x1">
     *   the distance from left of layer to the left margin, in pixels
     * </param>
     * <param name="y1">
     *   the distance from top of layer to the top margin, in pixels
     * </param>
     * <param name="x2">
     *   the distance from left of layer to the right margin, in pixels
     * </param>
     * <param name="y2">
     *   the distance from top of layer to the bottom margin, in pixels
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int setConsoleMargins(int x1, int y1, int x2, int y2)
    {
        return this.command_push("m"+Convert.ToString(x1)+","+Convert.ToString(y1)+","+Convert.ToString(x2)+","+Convert.ToString(y2));
    }


    /**
     * <summary>
     *   Sets up the background color used by the <c>clearConsole</c> function and by
     *   the console scrolling feature.
     * <para>
     * </para>
     * </summary>
     * <param name="bgcol">
     *   the background gray level to use when scrolling (0 = black,
     *   255 = white), or -1 for transparent
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int setConsoleBackground(int bgcol)
    {
        return this.command_push("b"+Convert.ToString(bgcol));
    }


    /**
     * <summary>
     *   Sets up the wrapping behavior used by the <c>consoleOut</c> function.
     * <para>
     * </para>
     * </summary>
     * <param name="wordwrap">
     *   <c>true</c> to wrap only between words,
     *   <c>false</c> to wrap on the last column anyway.
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int setConsoleWordWrap(bool wordwrap)
    {
        return this.command_push("w"+(wordwrap?"1":"0"));
    }


    /**
     * <summary>
     *   Blanks the console area within console margins, and resets the console pointer
     *   to the upper left corner of the console.
     * <para>
     * </para>
     * </summary>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int clearConsole()
    {
        return this.command_flush("^");
    }


    /**
     * <summary>
     *   Sets the position of the layer relative to the display upper left corner.
     * <para>
     *   When smooth scrolling is used, the display offset of the layer is
     *   automatically updated during the next milliseconds to animate the move of the layer.
     * </para>
     * </summary>
     * <param name="x">
     *   the distance from left of display to the upper left corner of the layer
     * </param>
     * <param name="y">
     *   the distance from top of display to the upper left corner of the layer
     * </param>
     * <param name="scrollTime">
     *   number of milliseconds to use for smooth scrolling, or
     *   0 if the scrolling should be immediate.
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int setLayerPosition(int x, int y, int scrollTime)
    {
        return this.command_flush("#"+Convert.ToString(x)+","+Convert.ToString(y)+","+Convert.ToString(scrollTime));
    }


    /**
     * <summary>
     *   Hides the layer.
     * <para>
     *   The state of the layer is preserved but the layer is not displayed
     *   on the screen until the next call to <c>unhide()</c>. Hiding the layer can positively
     *   affect the drawing speed, since it postpones the rendering until all operations are
     *   completed (double-buffering).
     * </para>
     * </summary>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int hide()
    {
        this.command_push("h");
        this._hidden = true;
        return this.flush_now();
    }


    /**
     * <summary>
     *   Shows the layer.
     * <para>
     *   Shows the layer again after a hide command.
     * </para>
     * </summary>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int unhide()
    {
        this._hidden = false;
        return this.command_flush("s");
    }


    /**
     * <summary>
     *   Gets parent YDisplay.
     * <para>
     *   Returns the parent YDisplay object of the current YDisplayLayer.
     * </para>
     * </summary>
     * <returns>
     *   an <c>YDisplay</c> object
     * </returns>
     */
    public virtual YDisplay get_display()
    {
        return this._display;
    }


    /**
     * <summary>
     *   Returns the display width, in pixels.
     * <para>
     * </para>
     * </summary>
     * <returns>
     *   an integer corresponding to the display width, in pixels
     * </returns>
     * <para>
     *   On failure, throws an exception or returns YDisplayLayer.DISPLAYWIDTH_INVALID.
     * </para>
     */
    public virtual int get_displayWidth()
    {
        return this._display.get_displayWidth();
    }


    /**
     * <summary>
     *   Returns the display height, in pixels.
     * <para>
     * </para>
     * </summary>
     * <returns>
     *   an integer corresponding to the display height, in pixels
     * </returns>
     * <para>
     *   On failure, throws an exception or returns YDisplayLayer.DISPLAYHEIGHT_INVALID.
     * </para>
     */
    public virtual int get_displayHeight()
    {
        return this._display.get_displayHeight();
    }


    /**
     * <summary>
     *   Returns the width of the layers to draw on, in pixels.
     * <para>
     * </para>
     * </summary>
     * <returns>
     *   an integer corresponding to the width of the layers to draw on, in pixels
     * </returns>
     * <para>
     *   On failure, throws an exception or returns YDisplayLayer.LAYERWIDTH_INVALID.
     * </para>
     */
    public virtual int get_layerWidth()
    {
        return this._display.get_layerWidth();
    }


    /**
     * <summary>
     *   Returns the height of the layers to draw on, in pixels.
     * <para>
     * </para>
     * </summary>
     * <returns>
     *   an integer corresponding to the height of the layers to draw on, in pixels
     * </returns>
     * <para>
     *   On failure, throws an exception or returns YDisplayLayer.LAYERHEIGHT_INVALID.
     * </para>
     */
    public virtual int get_layerHeight()
    {
        return this._display.get_layerHeight();
    }


    public virtual int resetHiddenFlag()
    {
        this._hidden = false;
        return YAPI.SUCCESS;
    }

    //--- (end of generated code: YDisplayLayer implementation)

  // internal function to flush any pending command for this layer
  public int flush_now()
    { int  res =YAPI.SUCCESS;
      if (_cmdbuff!="")
      {
        res = _display.sendCommand(_cmdbuff);
         _cmdbuff = "";
       }
      return res;
    }

  // internal function to buffer a command for this layer
  int  command_push(string cmd)
  { int res = YAPI.SUCCESS;
    if (_cmdbuff.Length + cmd.Length >=100)  res=flush_now();
    if (_cmdbuff=="")  _cmdbuff = _id.ToString();
    _cmdbuff = _cmdbuff + cmd;
    return YAPI.SUCCESS ;
  }

  // internal function to send a command for this layer
  int command_flush(string cmd)
  {
    int res = command_push(cmd);
    if (!_hidden) res = flush_now();
    return res;
  }


  //--- (generated code: YDisplayLayer functions)

    //--- (end of generated code: YDisplayLayer functions)
}

//--- (generated code: YDisplay class start)
/**
 * <summary>
 *   The <c>YDisplay</c> class allows to drive Yoctopuce displays.
 * <para>
 *   Yoctopuce display interface has been designed to easily
 *   show information and images. The device provides built-in
 *   multi-layer rendering. Layers can be drawn offline, individually,
 *   and freely moved on the display. It can also replay recorded
 *   sequences (animations).
 * </para>
 * <para>
 *   In order to draw on the screen, you should use the
 *   <c>display.get_displayLayer</c> method to retrieve the layer(s) on
 *   which you want to draw, and then use methods defined in
 *   <c>YDisplayLayer</c> to draw on the layers.
 * </para>
 * <para>
 * </para>
 * </summary>
 */
public class YDisplay : YFunction
{
//--- (end of generated code: YDisplay class start)
    //--- (generated code: YDisplay definitions)
    public new delegate void ValueCallback(YDisplay func, string value);
    public new delegate void TimedReportCallback(YDisplay func, YMeasure measure);

    public const int ENABLED_FALSE = 0;
    public const int ENABLED_TRUE = 1;
    public const int ENABLED_INVALID = -1;
    public const string STARTUPSEQ_INVALID = YAPI.INVALID_STRING;
    public const int BRIGHTNESS_INVALID = YAPI.INVALID_UINT;
    public const int ORIENTATION_LEFT = 0;
    public const int ORIENTATION_UP = 1;
    public const int ORIENTATION_RIGHT = 2;
    public const int ORIENTATION_DOWN = 3;
    public const int ORIENTATION_INVALID = -1;
    public const int DISPLAYWIDTH_INVALID = YAPI.INVALID_UINT;
    public const int DISPLAYHEIGHT_INVALID = YAPI.INVALID_UINT;
    public const int DISPLAYTYPE_MONO = 0;
    public const int DISPLAYTYPE_GRAY = 1;
    public const int DISPLAYTYPE_RGB = 2;
    public const int DISPLAYTYPE_INVALID = -1;
    public const int LAYERWIDTH_INVALID = YAPI.INVALID_UINT;
    public const int LAYERHEIGHT_INVALID = YAPI.INVALID_UINT;
    public const int LAYERCOUNT_INVALID = YAPI.INVALID_UINT;
    public const string COMMAND_INVALID = YAPI.INVALID_STRING;
    protected int _enabled = ENABLED_INVALID;
    protected string _startupSeq = STARTUPSEQ_INVALID;
    protected int _brightness = BRIGHTNESS_INVALID;
    protected int _orientation = ORIENTATION_INVALID;
    protected int _displayWidth = DISPLAYWIDTH_INVALID;
    protected int _displayHeight = DISPLAYHEIGHT_INVALID;
    protected int _displayType = DISPLAYTYPE_INVALID;
    protected int _layerWidth = LAYERWIDTH_INVALID;
    protected int _layerHeight = LAYERHEIGHT_INVALID;
    protected int _layerCount = LAYERCOUNT_INVALID;
    protected string _command = COMMAND_INVALID;
    protected ValueCallback _valueCallbackDisplay = null;
    protected List<YDisplayLayer> _allDisplayLayers = new List<YDisplayLayer>();
    //--- (end of generated code: YDisplay definitions)

    public YDisplay(string func)
        : base(func)
    {
        _className = "Display";
        //--- (generated code: YDisplay attributes initialization)
        //--- (end of generated code: YDisplay attributes initialization)
    }

  //--- (generated code: YDisplay implementation)

    protected override void _parseAttr(YAPI.YJSONObject json_val)
    {
        if (json_val.has("enabled"))
        {
            _enabled = json_val.getInt("enabled") > 0 ? 1 : 0;
        }
        if (json_val.has("startupSeq"))
        {
            _startupSeq = json_val.getString("startupSeq");
        }
        if (json_val.has("brightness"))
        {
            _brightness = json_val.getInt("brightness");
        }
        if (json_val.has("orientation"))
        {
            _orientation = json_val.getInt("orientation");
        }
        if (json_val.has("displayWidth"))
        {
            _displayWidth = json_val.getInt("displayWidth");
        }
        if (json_val.has("displayHeight"))
        {
            _displayHeight = json_val.getInt("displayHeight");
        }
        if (json_val.has("displayType"))
        {
            _displayType = json_val.getInt("displayType");
        }
        if (json_val.has("layerWidth"))
        {
            _layerWidth = json_val.getInt("layerWidth");
        }
        if (json_val.has("layerHeight"))
        {
            _layerHeight = json_val.getInt("layerHeight");
        }
        if (json_val.has("layerCount"))
        {
            _layerCount = json_val.getInt("layerCount");
        }
        if (json_val.has("command"))
        {
            _command = json_val.getString("command");
        }
        base._parseAttr(json_val);
    }


    /**
     * <summary>
     *   Returns true if the screen is powered, false otherwise.
     * <para>
     * </para>
     * <para>
     * </para>
     * </summary>
     * <returns>
     *   either <c>YDisplay.ENABLED_FALSE</c> or <c>YDisplay.ENABLED_TRUE</c>, according to true if the
     *   screen is powered, false otherwise
     * </returns>
     * <para>
     *   On failure, throws an exception or returns <c>YDisplay.ENABLED_INVALID</c>.
     * </para>
     */
    public int get_enabled()
    {
        int res;
        lock (_thisLock) {
            if (this._cacheExpiration <= YAPI.GetTickCount()) {
                if (this.load(YAPI._yapiContext.GetCacheValidity()) != YAPI.SUCCESS) {
                    return ENABLED_INVALID;
                }
            }
            res = this._enabled;
        }
        return res;
    }

    /**
     * <summary>
     *   Changes the power state of the display.
     * <para>
     * </para>
     * <para>
     * </para>
     * </summary>
     * <param name="newval">
     *   either <c>YDisplay.ENABLED_FALSE</c> or <c>YDisplay.ENABLED_TRUE</c>, according to the power state
     *   of the display
     * </param>
     * <para>
     * </para>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public int set_enabled(int newval)
    {
        string rest_val;
        lock (_thisLock) {
            rest_val = (newval > 0 ? "1" : "0");
            return _setAttr("enabled", rest_val);
        }
    }


    /**
     * <summary>
     *   Returns the name of the sequence to play when the displayed is powered on.
     * <para>
     * </para>
     * <para>
     * </para>
     * </summary>
     * <returns>
     *   a string corresponding to the name of the sequence to play when the displayed is powered on
     * </returns>
     * <para>
     *   On failure, throws an exception or returns <c>YDisplay.STARTUPSEQ_INVALID</c>.
     * </para>
     */
    public string get_startupSeq()
    {
        string res;
        lock (_thisLock) {
            if (this._cacheExpiration <= YAPI.GetTickCount()) {
                if (this.load(YAPI._yapiContext.GetCacheValidity()) != YAPI.SUCCESS) {
                    return STARTUPSEQ_INVALID;
                }
            }
            res = this._startupSeq;
        }
        return res;
    }

    /**
     * <summary>
     *   Changes the name of the sequence to play when the displayed is powered on.
     * <para>
     *   Remember to call the <c>saveToFlash()</c> method of the module if the
     *   modification must be kept.
     * </para>
     * <para>
     * </para>
     * </summary>
     * <param name="newval">
     *   a string corresponding to the name of the sequence to play when the displayed is powered on
     * </param>
     * <para>
     * </para>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public int set_startupSeq(string newval)
    {
        string rest_val;
        lock (_thisLock) {
            rest_val = newval;
            return _setAttr("startupSeq", rest_val);
        }
    }


    /**
     * <summary>
     *   Returns the luminosity of the  module informative LEDs (from 0 to 100).
     * <para>
     * </para>
     * <para>
     * </para>
     * </summary>
     * <returns>
     *   an integer corresponding to the luminosity of the  module informative LEDs (from 0 to 100)
     * </returns>
     * <para>
     *   On failure, throws an exception or returns <c>YDisplay.BRIGHTNESS_INVALID</c>.
     * </para>
     */
    public int get_brightness()
    {
        int res;
        lock (_thisLock) {
            if (this._cacheExpiration <= YAPI.GetTickCount()) {
                if (this.load(YAPI._yapiContext.GetCacheValidity()) != YAPI.SUCCESS) {
                    return BRIGHTNESS_INVALID;
                }
            }
            res = this._brightness;
        }
        return res;
    }

    /**
     * <summary>
     *   Changes the brightness of the display.
     * <para>
     *   The parameter is a value between 0 and
     *   100. Remember to call the <c>saveToFlash()</c> method of the module if the
     *   modification must be kept.
     * </para>
     * <para>
     * </para>
     * </summary>
     * <param name="newval">
     *   an integer corresponding to the brightness of the display
     * </param>
     * <para>
     * </para>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public int set_brightness(int newval)
    {
        string rest_val;
        lock (_thisLock) {
            rest_val = (newval).ToString();
            return _setAttr("brightness", rest_val);
        }
    }


    /**
     * <summary>
     *   Returns the currently selected display orientation.
     * <para>
     * </para>
     * <para>
     * </para>
     * </summary>
     * <returns>
     *   a value among <c>YDisplay.ORIENTATION_LEFT</c>, <c>YDisplay.ORIENTATION_UP</c>,
     *   <c>YDisplay.ORIENTATION_RIGHT</c> and <c>YDisplay.ORIENTATION_DOWN</c> corresponding to the
     *   currently selected display orientation
     * </returns>
     * <para>
     *   On failure, throws an exception or returns <c>YDisplay.ORIENTATION_INVALID</c>.
     * </para>
     */
    public int get_orientation()
    {
        int res;
        lock (_thisLock) {
            if (this._cacheExpiration <= YAPI.GetTickCount()) {
                if (this.load(YAPI._yapiContext.GetCacheValidity()) != YAPI.SUCCESS) {
                    return ORIENTATION_INVALID;
                }
            }
            res = this._orientation;
        }
        return res;
    }

    /**
     * <summary>
     *   Changes the display orientation.
     * <para>
     *   Remember to call the <c>saveToFlash()</c>
     *   method of the module if the modification must be kept.
     * </para>
     * <para>
     * </para>
     * </summary>
     * <param name="newval">
     *   a value among <c>YDisplay.ORIENTATION_LEFT</c>, <c>YDisplay.ORIENTATION_UP</c>,
     *   <c>YDisplay.ORIENTATION_RIGHT</c> and <c>YDisplay.ORIENTATION_DOWN</c> corresponding to the display orientation
     * </param>
     * <para>
     * </para>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public int set_orientation(int newval)
    {
        string rest_val;
        lock (_thisLock) {
            rest_val = (newval).ToString();
            return _setAttr("orientation", rest_val);
        }
    }


    /**
     * <summary>
     *   Returns the display width, in pixels.
     * <para>
     * </para>
     * <para>
     * </para>
     * </summary>
     * <returns>
     *   an integer corresponding to the display width, in pixels
     * </returns>
     * <para>
     *   On failure, throws an exception or returns <c>YDisplay.DISPLAYWIDTH_INVALID</c>.
     * </para>
     */
    public int get_displayWidth()
    {
        int res;
        lock (_thisLock) {
            if (this._cacheExpiration == 0) {
                if (this.load(YAPI._yapiContext.GetCacheValidity()) != YAPI.SUCCESS) {
                    return DISPLAYWIDTH_INVALID;
                }
            }
            res = this._displayWidth;
        }
        return res;
    }


    /**
     * <summary>
     *   Returns the display height, in pixels.
     * <para>
     * </para>
     * <para>
     * </para>
     * </summary>
     * <returns>
     *   an integer corresponding to the display height, in pixels
     * </returns>
     * <para>
     *   On failure, throws an exception or returns <c>YDisplay.DISPLAYHEIGHT_INVALID</c>.
     * </para>
     */
    public int get_displayHeight()
    {
        int res;
        lock (_thisLock) {
            if (this._cacheExpiration == 0) {
                if (this.load(YAPI._yapiContext.GetCacheValidity()) != YAPI.SUCCESS) {
                    return DISPLAYHEIGHT_INVALID;
                }
            }
            res = this._displayHeight;
        }
        return res;
    }


    /**
     * <summary>
     *   Returns the display type: monochrome, gray levels or full color.
     * <para>
     * </para>
     * <para>
     * </para>
     * </summary>
     * <returns>
     *   a value among <c>YDisplay.DISPLAYTYPE_MONO</c>, <c>YDisplay.DISPLAYTYPE_GRAY</c> and
     *   <c>YDisplay.DISPLAYTYPE_RGB</c> corresponding to the display type: monochrome, gray levels or full color
     * </returns>
     * <para>
     *   On failure, throws an exception or returns <c>YDisplay.DISPLAYTYPE_INVALID</c>.
     * </para>
     */
    public int get_displayType()
    {
        int res;
        lock (_thisLock) {
            if (this._cacheExpiration == 0) {
                if (this.load(YAPI._yapiContext.GetCacheValidity()) != YAPI.SUCCESS) {
                    return DISPLAYTYPE_INVALID;
                }
            }
            res = this._displayType;
        }
        return res;
    }


    /**
     * <summary>
     *   Returns the width of the layers to draw on, in pixels.
     * <para>
     * </para>
     * <para>
     * </para>
     * </summary>
     * <returns>
     *   an integer corresponding to the width of the layers to draw on, in pixels
     * </returns>
     * <para>
     *   On failure, throws an exception or returns <c>YDisplay.LAYERWIDTH_INVALID</c>.
     * </para>
     */
    public int get_layerWidth()
    {
        int res;
        lock (_thisLock) {
            if (this._cacheExpiration == 0) {
                if (this.load(YAPI._yapiContext.GetCacheValidity()) != YAPI.SUCCESS) {
                    return LAYERWIDTH_INVALID;
                }
            }
            res = this._layerWidth;
        }
        return res;
    }


    /**
     * <summary>
     *   Returns the height of the layers to draw on, in pixels.
     * <para>
     * </para>
     * <para>
     * </para>
     * </summary>
     * <returns>
     *   an integer corresponding to the height of the layers to draw on, in pixels
     * </returns>
     * <para>
     *   On failure, throws an exception or returns <c>YDisplay.LAYERHEIGHT_INVALID</c>.
     * </para>
     */
    public int get_layerHeight()
    {
        int res;
        lock (_thisLock) {
            if (this._cacheExpiration == 0) {
                if (this.load(YAPI._yapiContext.GetCacheValidity()) != YAPI.SUCCESS) {
                    return LAYERHEIGHT_INVALID;
                }
            }
            res = this._layerHeight;
        }
        return res;
    }


    /**
     * <summary>
     *   Returns the number of available layers to draw on.
     * <para>
     * </para>
     * <para>
     * </para>
     * </summary>
     * <returns>
     *   an integer corresponding to the number of available layers to draw on
     * </returns>
     * <para>
     *   On failure, throws an exception or returns <c>YDisplay.LAYERCOUNT_INVALID</c>.
     * </para>
     */
    public int get_layerCount()
    {
        int res;
        lock (_thisLock) {
            if (this._cacheExpiration == 0) {
                if (this.load(YAPI._yapiContext.GetCacheValidity()) != YAPI.SUCCESS) {
                    return LAYERCOUNT_INVALID;
                }
            }
            res = this._layerCount;
        }
        return res;
    }


    public string get_command()
    {
        string res;
        lock (_thisLock) {
            if (this._cacheExpiration <= YAPI.GetTickCount()) {
                if (this.load(YAPI._yapiContext.GetCacheValidity()) != YAPI.SUCCESS) {
                    return COMMAND_INVALID;
                }
            }
            res = this._command;
        }
        return res;
    }

    public int set_command(string newval)
    {
        string rest_val;
        lock (_thisLock) {
            rest_val = newval;
            return _setAttr("command", rest_val);
        }
    }


    /**
     * <summary>
     *   Retrieves a display for a given identifier.
     * <para>
     *   The identifier can be specified using several formats:
     * </para>
     * <para>
     * </para>
     * <para>
     *   - FunctionLogicalName
     * </para>
     * <para>
     *   - ModuleSerialNumber.FunctionIdentifier
     * </para>
     * <para>
     *   - ModuleSerialNumber.FunctionLogicalName
     * </para>
     * <para>
     *   - ModuleLogicalName.FunctionIdentifier
     * </para>
     * <para>
     *   - ModuleLogicalName.FunctionLogicalName
     * </para>
     * <para>
     * </para>
     * <para>
     *   This function does not require that the display is online at the time
     *   it is invoked. The returned object is nevertheless valid.
     *   Use the method <c>YDisplay.isOnline()</c> to test if the display is
     *   indeed online at a given time. In case of ambiguity when looking for
     *   a display by logical name, no error is notified: the first instance
     *   found is returned. The search is performed first by hardware name,
     *   then by logical name.
     * </para>
     * <para>
     *   If a call to this object's is_online() method returns FALSE although
     *   you are certain that the matching device is plugged, make sure that you did
     *   call registerHub() at application initialization time.
     * </para>
     * <para>
     * </para>
     * </summary>
     * <param name="func">
     *   a string that uniquely characterizes the display, for instance
     *   <c>YD128X32.display</c>.
     * </param>
     * <returns>
     *   a <c>YDisplay</c> object allowing you to drive the display.
     * </returns>
     */
    public static YDisplay FindDisplay(string func)
    {
        YDisplay obj;
        lock (YAPI.globalLock) {
            obj = (YDisplay) YFunction._FindFromCache("Display", func);
            if (obj == null) {
                obj = new YDisplay(func);
                YFunction._AddToCache("Display", func, obj);
            }
        }
        return obj;
    }


    /**
     * <summary>
     *   Registers the callback function that is invoked on every change of advertised value.
     * <para>
     *   The callback is invoked only during the execution of <c>ySleep</c> or <c>yHandleEvents</c>.
     *   This provides control over the time when the callback is triggered. For good responsiveness, remember to call
     *   one of these two functions periodically. To unregister a callback, pass a null pointer as argument.
     * </para>
     * <para>
     * </para>
     * </summary>
     * <param name="callback">
     *   the callback function to call, or a null pointer. The callback function should take two
     *   arguments: the function object of which the value has changed, and the character string describing
     *   the new advertised value.
     * @noreturn
     * </param>
     */
    public int registerValueCallback(ValueCallback callback)
    {
        string val;
        if (callback != null) {
            YFunction._UpdateValueCallbackList(this, true);
        } else {
            YFunction._UpdateValueCallbackList(this, false);
        }
        this._valueCallbackDisplay = callback;
        // Immediately invoke value callback with current value
        if (callback != null && this.isOnline()) {
            val = this._advertisedValue;
            if (!(val == "")) {
                this._invokeValueCallback(val);
            }
        }
        return 0;
    }


    public override int _invokeValueCallback(string value)
    {
        if (this._valueCallbackDisplay != null) {
            this._valueCallbackDisplay(this, value);
        } else {
            base._invokeValueCallback(value);
        }
        return 0;
    }


    /**
     * <summary>
     *   Clears the display screen and resets all display layers to their default state.
     * <para>
     *   Using this function in a sequence will kill the sequence play-back. Don't use that
     *   function to reset the display at sequence start-up.
     * </para>
     * <para>
     * </para>
     * </summary>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int resetAll()
    {
        this.flushLayers();
        this.resetHiddenLayerFlags();
        return this.sendCommand("Z");
    }


    /**
     * <summary>
     *   Smoothly changes the brightness of the screen to produce a fade-in or fade-out
     *   effect.
     * <para>
     * </para>
     * </summary>
     * <param name="brightness">
     *   the new screen brightness
     * </param>
     * <param name="duration">
     *   duration of the brightness transition, in milliseconds.
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int fade(int brightness, int duration)
    {
        this.flushLayers();
        return this.sendCommand("+"+Convert.ToString(brightness)+","+Convert.ToString(duration));
    }


    /**
     * <summary>
     *   Starts to record all display commands into a sequence, for later replay.
     * <para>
     *   The name used to store the sequence is specified when calling
     *   <c>saveSequence()</c>, once the recording is complete.
     * </para>
     * </summary>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int newSequence()
    {
        this.flushLayers();
        this._sequence = "";
        this._recording = true;
        return YAPI.SUCCESS;
    }


    /**
     * <summary>
     *   Stops recording display commands and saves the sequence into the specified
     *   file on the display internal memory.
     * <para>
     *   The sequence can be later replayed
     *   using <c>playSequence()</c>.
     * </para>
     * </summary>
     * <param name="sequenceName">
     *   the name of the newly created sequence
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int saveSequence(string sequenceName)
    {
        this.flushLayers();
        this._recording = false;
        this._upload(sequenceName, YAPI.DefaultEncoding.GetBytes(this._sequence));
        //We need to use YPRINTF("") for Objective-C
        this._sequence = "";
        return YAPI.SUCCESS;
    }


    /**
     * <summary>
     *   Replays a display sequence previously recorded using
     *   <c>newSequence()</c> and <c>saveSequence()</c>.
     * <para>
     * </para>
     * </summary>
     * <param name="sequenceName">
     *   the name of the newly created sequence
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int playSequence(string sequenceName)
    {
        this.flushLayers();
        return this.sendCommand("S"+sequenceName);
    }


    /**
     * <summary>
     *   Waits for a specified delay (in milliseconds) before playing next
     *   commands in current sequence.
     * <para>
     *   This method can be used while
     *   recording a display sequence, to insert a timed wait in the sequence
     *   (without any immediate effect). It can also be used dynamically while
     *   playing a pre-recorded sequence, to suspend or resume the execution of
     *   the sequence. To cancel a delay, call the same method with a zero delay.
     * </para>
     * </summary>
     * <param name="delay_ms">
     *   the duration to wait, in milliseconds
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int pauseSequence(int delay_ms)
    {
        this.flushLayers();
        return this.sendCommand("W"+Convert.ToString(delay_ms));
    }


    /**
     * <summary>
     *   Stops immediately any ongoing sequence replay.
     * <para>
     *   The display is left as is.
     * </para>
     * </summary>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int stopSequence()
    {
        this.flushLayers();
        return this.sendCommand("S");
    }


    /**
     * <summary>
     *   Uploads an arbitrary file (for instance a GIF file) to the display, to the
     *   specified full path name.
     * <para>
     *   If a file already exists with the same path name,
     *   its content is overwritten.
     * </para>
     * </summary>
     * <param name="pathname">
     *   path and name of the new file to create
     * </param>
     * <param name="content">
     *   binary buffer with the content to set
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int upload(string pathname, byte[] content)
    {
        return this._upload(pathname, content);
    }


    /**
     * <summary>
     *   Copies the whole content of a layer to another layer.
     * <para>
     *   The color and transparency
     *   of all the pixels from the destination layer are set to match the source pixels.
     *   This method only affects the displayed content, but does not change any
     *   property of the layer object.
     *   Note that layer 0 has no transparency support (it is always completely opaque).
     * </para>
     * </summary>
     * <param name="srcLayerId">
     *   the identifier of the source layer (a number in range 0..layerCount-1)
     * </param>
     * <param name="dstLayerId">
     *   the identifier of the destination layer (a number in range 0..layerCount-1)
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int copyLayerContent(int srcLayerId, int dstLayerId)
    {
        this.flushLayers();
        return this.sendCommand("o"+Convert.ToString(srcLayerId)+","+Convert.ToString(dstLayerId));
    }


    /**
     * <summary>
     *   Swaps the whole content of two layers.
     * <para>
     *   The color and transparency of all the pixels from
     *   the two layers are swapped. This method only affects the displayed content, but does
     *   not change any property of the layer objects. In particular, the visibility of each
     *   layer stays unchanged. When used between one hidden layer and a visible layer,
     *   this method makes it possible to easily implement double-buffering.
     *   Note that layer 0 has no transparency support (it is always completely opaque).
     * </para>
     * </summary>
     * <param name="layerIdA">
     *   the first layer (a number in range 0..layerCount-1)
     * </param>
     * <param name="layerIdB">
     *   the second layer (a number in range 0..layerCount-1)
     * </param>
     * <returns>
     *   <c>YAPI.SUCCESS</c> if the call succeeds.
     * </returns>
     * <para>
     *   On failure, throws an exception or returns a negative error code.
     * </para>
     */
    public virtual int swapLayerContent(int layerIdA, int layerIdB)
    {
        this.flushLayers();
        return this.sendCommand("E"+Convert.ToString(layerIdA)+","+Convert.ToString(layerIdB));
    }


    /**
     * <summary>
     *   Returns a YDisplayLayer object that can be used to draw on the specified
     *   layer.
     * <para>
     *   The content is displayed only when the layer is active on the
     *   screen (and not masked by other overlapping layers).
     * </para>
     * </summary>
     * <param name="layerId">
     *   the identifier of the layer (a number in range 0..layerCount-1)
     * </param>
     * <returns>
     *   an <c>YDisplayLayer</c> object
     * </returns>
     * <para>
     *   On failure, throws an exception or returns <c>null</c>.
     * </para>
     */
    public virtual YDisplayLayer get_displayLayer(int layerId)
    {
        int layercount;
        int idx;
        layercount = this.get_layerCount();
        if (!((layerId >= 0) && (layerId < layercount))) {
            this._throw(YAPI.INVALID_ARGUMENT, "invalid DisplayLayer index");
            return null;
        }
        if (this._allDisplayLayers.Count == 0) {
            idx = 0;
            while (idx < layercount) {
                this._allDisplayLayers.Add(new YDisplayLayer(this, idx));
                idx = idx + 1;
            }
        }
        return this._allDisplayLayers[layerId];
    }

    /**
     * <summary>
     *   Continues the enumeration of displays started using <c>yFirstDisplay()</c>.
     * <para>
     *   Caution: You can't make any assumption about the returned displays order.
     *   If you want to find a specific a display, use <c>Display.findDisplay()</c>
     *   and a hardwareID or a logical name.
     * </para>
     * </summary>
     * <returns>
     *   a pointer to a <c>YDisplay</c> object, corresponding to
     *   a display currently online, or a <c>null</c> pointer
     *   if there are no more displays to enumerate.
     * </returns>
     */
    public YDisplay nextDisplay()
    {
        string hwid = "";
        if (YAPI.YISERR(_nextFunction(ref hwid)))
            return null;
        if (hwid == "")
            return null;
        return FindDisplay(hwid);
    }

    //--- (end of generated code: YDisplay implementation)

    private bool _recording;
    private string _sequence;

    int flushLayers()
    {
      int i;
      if (_allDisplayLayers != null) {
          for (i = 0; i < _allDisplayLayers.Count; i++) {
              _allDisplayLayers[i].flush_now();
          }
      }
      return YAPI.SUCCESS;
    }

    // internal method to clear all hidden flags in the API
    void resetHiddenLayerFlags()
    {
      int i;
      if (this._allDisplayLayers.Count > 0) {
          for (i = 0; i < _allDisplayLayers.Count; i++) {
              _allDisplayLayers[i].resetHiddenFlag();
          }
      }
    }

    public int sendCommand(string cmd )
    {
      if (!_recording) {
         return this.set_command(cmd);
      }
      _sequence = _sequence + cmd + "\n";
      return YAPI.SUCCESS;
    }

    //--- (generated code: YDisplay functions)

    /**
     * <summary>
     *   Starts the enumeration of displays currently accessible.
     * <para>
     *   Use the method <c>YDisplay.nextDisplay()</c> to iterate on
     *   next displays.
     * </para>
     * </summary>
     * <returns>
     *   a pointer to a <c>YDisplay</c> object, corresponding to
     *   the first display currently online, or a <c>null</c> pointer
     *   if there are none.
     * </returns>
     */
    public static YDisplay FirstDisplay()
    {
        YFUN_DESCR[] v_fundescr = new YFUN_DESCR[1];
        YDEV_DESCR dev = default(YDEV_DESCR);
        int neededsize = 0;
        int err = 0;
        string serial = null;
        string funcId = null;
        string funcName = null;
        string funcVal = null;
        string errmsg = "";
        int size = Marshal.SizeOf(v_fundescr[0]);
        IntPtr p = Marshal.AllocHGlobal(Marshal.SizeOf(v_fundescr[0]));
        err = YAPI.apiGetFunctionsByClass("Display", 0, p, size, ref neededsize, ref errmsg);
        Marshal.Copy(p, v_fundescr, 0, 1);
        Marshal.FreeHGlobal(p);
        if ((YAPI.YISERR(err) | (neededsize == 0)))
            return null;
        serial = "";
        funcId = "";
        funcName = "";
        funcVal = "";
        errmsg = "";
        if ((YAPI.YISERR(YAPI.yapiGetFunctionInfo(v_fundescr[0], ref dev, ref serial, ref funcId, ref funcName, ref funcVal, ref errmsg))))
            return null;
        return FindDisplay(serial + "." + funcId);
    }

    //--- (end of generated code: YDisplay functions)
}
#pragma warning restore 1591
