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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Drawing;
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using System.Diagnostics;
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using System.Windows.Forms;
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using System.Drawing.Drawing2D;
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namespace POSV.Keyboard
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{
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/// <summary>
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/// Represents a renderer for a VirtualKeyboard.
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/// </summary>
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public abstract class Renderer
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{
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private VirtualKeyboardColorTable _ColorTable;
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/// <summary>
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/// Gets or sets the ColorTable used by this renderer to render the virtual keyboard.
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/// </summary>
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public VirtualKeyboardColorTable ColorTable
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{
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get { return _ColorTable; }
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set { _ColorTable = value; }
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}
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/// <summary>
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/// Draws the top bar of the VirtualKeyboard.
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/// </summary>
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/// <param name="args"></param>
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public abstract void DrawTopBar(TopBarRendererEventArgs args);
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public abstract void DrawCloseButton(CloseButtonRendererEventArgs args);
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/// <summary>
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/// Draws the background of the VirtualKeyboard.
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/// </summary>
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/// <param name="args">Provides context information.</param>
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public abstract void DrawBackground(BackgroundRendererEventArgs args);
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/// <summary>
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/// Draws a key of the VirtualKeyboard.
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/// </summary>
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/// <param name="args">Provides context information.</param>
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public abstract void DrawKey(KeyRendererEventArgs args);
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/// <summary>
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/// Called when the control starts rendering a new frame.
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/// </summary>
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/// <param name="args">Provides context information.</param>
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public virtual void BeginFrame(BeginFrameRendererEventArgs args) { }
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/// <summary>
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/// Called after the control finished rendering the frame.
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/// </summary>
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public virtual void EndFrame() { }
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}
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/// <summary>
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/// Represents a VirtualKeyboard renderer with a flat style.
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/// </summary>
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public class FlatStyleRenderer : Renderer
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{
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// The ratio between the key size and the font that displays the letters on the keys.
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private const float _KeyFontSizeRatio = 4;
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// The ratio between the key size and the font that displays the hints (e.g. Underline, Italic) on the keys.
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private const float _HintFontSizeRatio = 7;
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private StringFormat _CenteredTextStringFormat;
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private StringFormat _TopCenteredTextStringFormat;
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private float _ScaleFactorX;
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private float _ScaleFactorY;
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private Font _KeyFont;
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private Font _HintFont;
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private Rectangle _KeysBounds;
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private static VirtualKeyboardColorTable _DefaultColorTable = new VirtualKeyboardColorTable();
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/// <summary>
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/// Gets or sets whether anti-alias smoothing is used while painting. Default value is true.
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/// </summary>
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public bool ForceAntiAlias { get; set; }
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/// <summary>
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/// Starts rendering a new frame with the black style. This gives the renderer a chance to cash some resources.
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/// </summary>
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public override void BeginFrame(BeginFrameRendererEventArgs args)
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{
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_CenteredTextStringFormat = new StringFormat();
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_CenteredTextStringFormat.Alignment = StringAlignment.Center;
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_CenteredTextStringFormat.LineAlignment = StringAlignment.Center;
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_TopCenteredTextStringFormat = new StringFormat();
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_TopCenteredTextStringFormat.Alignment = StringAlignment.Center;
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_TopCenteredTextStringFormat.LineAlignment = StringAlignment.Near;
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// With this fx and fy we convert between logical units and pixels.
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_ScaleFactorX = (float)args.Bounds.Width / args.Layout.LogicalWidth;
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_ScaleFactorY = (float)args.Bounds.Height / args.Layout.LogicalHeight;
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_KeysBounds = args.Bounds;
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float min = Math.Min(_ScaleFactorX, _ScaleFactorY);
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float keyFontSize = min * LinearKeyboardLayout.NormalKeySize / _KeyFontSizeRatio;
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float hintFontSize = min * LinearKeyboardLayout.NormalKeySize / _HintFontSizeRatio;
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if (keyFontSize < 1)
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keyFontSize = 1;
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if (hintFontSize < 1)
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hintFontSize = 1;
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_KeyFont = new Font(args.Font.FontFamily, keyFontSize);
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_HintFont = new Font(args.Font.FontFamily, hintFontSize);
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if (ForceAntiAlias)
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args.Graphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
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}
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/// <summary>
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/// Ends rendering a new frame with the black style. This gives the renderer a chance to free resources used during the frame.
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/// </summary>
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public override void EndFrame()
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{
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if (_CenteredTextStringFormat != null)
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_CenteredTextStringFormat.Dispose();
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if (_TopCenteredTextStringFormat != null)
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_TopCenteredTextStringFormat.Dispose();
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if (_KeyFont != null)
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_KeyFont.Dispose();
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if (_HintFont != null)
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_HintFont.Dispose();
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}
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/// <summary>
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/// Creates a new renderer for the black style.
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/// </summary>
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public FlatStyleRenderer()
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{
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ColorTable = _DefaultColorTable;
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}
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/// <summary>
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/// Draws the background of a VirtualKeyboard.
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/// </summary>
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/// <param name="args">Provides context information.</param>
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public override void DrawBackground(BackgroundRendererEventArgs args)
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{
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if (ColorTable != null)
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args.Graphics.FillRectangle(ColorTable.BackgroundBrush, args.ClipRectangle);
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}
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internal static void DrawBackspaceSign(Graphics g, Rectangle rect, Brush background, Brush foreground)
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{
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SmoothingMode osm = g.SmoothingMode; // old smoothing mode, to restore it at the end.
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g.SmoothingMode = SmoothingMode.AntiAlias;
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int unit = Math.Min(rect.Width, rect.Height);
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Point[] points = new Point[]
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{
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new Point(-2 * unit, 0),
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new Point(-1 * unit, -1 * unit),
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new Point(2 * unit, -1 * unit),
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new Point(2 * unit, 1 * unit),
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new Point(-1 * unit, 1 * unit),
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new Point(-2 * unit, 0)
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};
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g.TranslateTransform(rect.Left + rect.Width / 2, rect.Top + rect.Height / 2);
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g.ScaleTransform(0.125f, 0.125f);
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g.FillPolygon(foreground, points);
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g.ScaleTransform(8, 8);
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g.ScaleTransform(0.125f, 0.125f);
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g.TranslateTransform(unit / 2, 0);
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using (Pen p = new Pen(background, unit * 8 / 20))
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{
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g.DrawLine(p, -unit / 2, -unit / 2, unit / 2, unit / 2);
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g.DrawLine(p, -unit / 2, unit / 2, unit / 2, -unit / 2);
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}
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g.TranslateTransform(-unit / 2, 0);
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g.ScaleTransform(8, 8);
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g.TranslateTransform(-(rect.Left + rect.Width / 2), -(rect.Top + rect.Height / 2));
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g.SmoothingMode = osm;
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}
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internal static void DrawSmileySign(Graphics g, Rectangle rect, Brush background, Brush foreground)
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{
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SmoothingMode osm = g.SmoothingMode; // old smoothing mode, to restore it at the end.
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g.SmoothingMode = SmoothingMode.AntiAlias;
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int unit = Math.Min(rect.Width, rect.Height) * 2 / 5;
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float u = unit / 20f;
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PointF[] points = new PointF[]
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{
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new PointF(-5, 0),
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new PointF(-7, 1),
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new PointF(-6, 5),
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new PointF(-2, 8),
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new PointF(2, 8),
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new PointF(6, 5),
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new PointF(7, 1),
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new PointF(5, 0),
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new PointF(0, 2)
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};
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for (int i = 0; i < points.Length; i++)
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{
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points[i].X *= u;
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points[i].Y *= u;
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}
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g.TranslateTransform(rect.Left + rect.Width / 2, rect.Top + rect.Height / 2);
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g.FillEllipse(foreground, new Rectangle(-unit / 2, -unit / 2, unit, unit));
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g.FillClosedCurve(background, points, System.Drawing.Drawing2D.FillMode.Winding, 0.5f);
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g.FillEllipse(background, new Rectangle((int)(-7 * u), (int)(-7 * u), (int)(5 * u), (int)(5 * u)));
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g.FillEllipse(background, new Rectangle((int)(2 * u), (int)(-7 * u), (int)(5 * u), (int)(5 * u)));
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g.TranslateTransform(-(rect.Left + rect.Width / 2), -(rect.Top + rect.Height / 2));
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g.SmoothingMode = osm;
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}
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internal static void DrawUpArrow(Graphics g, Rectangle rect, Brush background, Brush foreground)
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{
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SmoothingMode osm = g.SmoothingMode; // old smoothing mode, to restore it at the end.
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g.SmoothingMode = SmoothingMode.AntiAlias;
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int unit = Math.Min(rect.Width, rect.Height) / 2 / 4;
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g.TranslateTransform(rect.Left + rect.Width / 2, rect.Top + rect.Height / 2);
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using (Pen p = new Pen(foreground, unit / 2f))
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{
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g.DrawLine(p, 0, -unit * 1.5f, 0, unit * 1.5f);
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g.DrawLine(p, 0, -unit * 1.5f, -unit, 0);
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g.DrawLine(p, 0, -unit * 1.5f, unit, 0);
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}
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g.TranslateTransform(-(rect.Left + rect.Width / 2), -(rect.Top + rect.Height / 2));
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g.SmoothingMode = osm;
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}
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/// <summary>
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/// Draws the key of a VirtualKeyboard.
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/// </summary>
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/// <param name="args">Provides context information.</param>
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public override void DrawKey(KeyRendererEventArgs args)
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{
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Key key = args.Key;
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if (ColorTable != null)
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{
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Rectangle rect = args.Bounds;
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if (args.ClipRectangle.IntersectsWith(rect))
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{
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Brush keyBrush = ColorTable.KeysBrush;
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if (key.Style == KeyStyle.Dark)
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keyBrush = ColorTable.DarkKeysBrush;
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else if (key.Style == KeyStyle.Light)
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keyBrush = ColorTable.LightKeysBrush;
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else if (key.Style == KeyStyle.Pressed)
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keyBrush = ColorTable.PressedKeysBrush;
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else if (key.Style == KeyStyle.Toggled)
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keyBrush = ColorTable.KeysBrush;
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if (args.IsDown)
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keyBrush = ColorTable.DownKeysBrush;
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Brush textBrush = ColorTable.TextBrush;
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|
if (key.Style == KeyStyle.Toggled)
|
|
|
|
|
|
textBrush = ColorTable.ToggleTextBrush;
|
|
|
|
|
|
if (args.IsDown)
|
|
|
|
|
|
textBrush = ColorTable.DownTextBrush;
|
|
|
|
|
|
|
|
|
|
|
|
args.Graphics.FillRectangle(keyBrush, rect);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
if (key.Info == "{BACKSPACE}")
|
|
|
|
|
|
{
|
|
|
|
|
|
DrawBackspaceSign(args.Graphics, rect, keyBrush, textBrush);
|
|
|
|
|
|
}
|
|
|
|
|
|
else if (key.Caption == ":-)")
|
|
|
|
|
|
{
|
|
|
|
|
|
DrawSmileySign(args.Graphics, rect, keyBrush, textBrush);
|
|
|
|
|
|
}
|
|
|
|
|
|
else if (key.Caption == "Shift")
|
|
|
|
|
|
{
|
|
|
|
|
|
DrawUpArrow(args.Graphics, rect, keyBrush, textBrush);
|
|
|
|
|
|
}
|
|
|
|
|
|
else
|
|
|
|
|
|
{
|
|
|
|
|
|
args.Graphics.DrawString(key.Caption, _KeyFont, textBrush, rect, _CenteredTextStringFormat);
|
|
|
|
|
|
|
|
|
|
|
|
if (key.Hint != null)
|
|
|
|
|
|
{
|
|
|
|
|
|
args.Graphics.DrawString(key.Hint, _HintFont, textBrush, rect, _TopCenteredTextStringFormat);
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
public override void DrawCloseButton(CloseButtonRendererEventArgs args)
|
|
|
|
|
|
{
|
|
|
|
|
|
Rectangle rect = args.Bounds;
|
|
|
|
|
|
rect.Inflate(-4, -4);
|
|
|
|
|
|
if (args.IsDown)
|
|
|
|
|
|
{
|
|
|
|
|
|
args.Graphics.FillRectangle(ColorTable.DownKeysBrush, args.Bounds);
|
|
|
|
|
|
using (Pen p = new Pen(ColorTable.DownTextBrush, 4))
|
|
|
|
|
|
{
|
|
|
|
|
|
args.Graphics.DrawLine(p, rect.Left, rect.Top, rect.Right, rect.Bottom);
|
|
|
|
|
|
args.Graphics.DrawLine(p, rect.Left, rect.Bottom, rect.Right, rect.Top);
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
else
|
|
|
|
|
|
{
|
|
|
|
|
|
//args.Graphics.FillRectangle(ColorTable.KeysBrush, args.Bounds);
|
|
|
|
|
|
using (Pen p = new Pen(ColorTable.TextBrush, 4))
|
|
|
|
|
|
{
|
|
|
|
|
|
args.Graphics.DrawLine(p, rect.Left, rect.Top, rect.Right, rect.Bottom);
|
|
|
|
|
|
args.Graphics.DrawLine(p, rect.Left, rect.Bottom, rect.Right, rect.Top);
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
public override void DrawTopBar(TopBarRendererEventArgs args)
|
|
|
|
|
|
{
|
|
|
|
|
|
args.Graphics.DrawString(args.Text, args.Font, ColorTable.TopBarTextBrush, args.Bounds);
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Provides data for Key rendering.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public class KeyRendererEventArgs : EventArgs
|
|
|
|
|
|
{
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Gets a reference to the Key instance being rendered.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public Key Key { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
public Rectangle Bounds { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Gets a reference to the Graphics object to be used for rendering.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public Graphics Graphics { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Gets a value indicating if this key is currently down.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public bool IsDown { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Gets the rectangle in which to paint.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public Rectangle ClipRectangle { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Creates a new instance and initializes it with provided values.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
/// <param name="graphics">The Graphics object to be used for rendering.</param>
|
|
|
|
|
|
/// <param name="key">The Key instance being rendered.</param>
|
|
|
|
|
|
/// <param name="isDown">Indicates if the key is currently hold down.</param>
|
|
|
|
|
|
/// <param name="clipRectangle">The rectangle in which to paint.</param>
|
|
|
|
|
|
public KeyRendererEventArgs(Graphics graphics, Key key, bool isDown, Rectangle clipRectangle, Rectangle bounds)
|
|
|
|
|
|
{
|
|
|
|
|
|
Key = key;
|
|
|
|
|
|
Graphics = graphics;
|
|
|
|
|
|
IsDown = isDown;
|
|
|
|
|
|
ClipRectangle = clipRectangle;
|
|
|
|
|
|
Bounds = bounds;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Provides data for rendering the background of a VirtualKeyboard.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public class BackgroundRendererEventArgs : EventArgs
|
|
|
|
|
|
{
|
|
|
|
|
|
public Rectangle Bounds { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Gets a reference to the Graphics object to be used for rendering.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public Graphics Graphics { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Gets the rectangle in which to paint.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public Rectangle ClipRectangle { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Creates a new instance and initializes it with provided values.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
/// <param name="graphics">The Graphics object to be used for rendering.</param>
|
|
|
|
|
|
/// <param name="size">The area where the background should be drawn.</param>
|
|
|
|
|
|
public BackgroundRendererEventArgs(Graphics graphics, Rectangle clipRectangle, Rectangle bounds)
|
|
|
|
|
|
{
|
|
|
|
|
|
Graphics = graphics;
|
|
|
|
|
|
ClipRectangle = clipRectangle;
|
|
|
|
|
|
Bounds = bounds;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
public class BeginFrameRendererEventArgs : EventArgs
|
|
|
|
|
|
{
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Gets a reference to the Graphics object to be used for rendering.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public Graphics Graphics { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Gets the rectangle in which to paint.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public Rectangle ClipRectangle { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Gets the size of the background area in which to render the keyboard.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
//public Size Size { get; private set; }
|
|
|
|
|
|
public Rectangle Bounds { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Gets the font on the control.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public Font Font { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Gets the current KeyboardLayout which will be rendered in this frame.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public KeyboardLayout Layout { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Creates a new instance and initializes it with provided values.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
/// <param name="size">The size of the background area.</param>
|
|
|
|
|
|
/// <param name="font">The font of the control.</param>
|
|
|
|
|
|
/// <param name="layout">The current KeyboardLayout that will be rendered in this frame.</param>
|
|
|
|
|
|
public BeginFrameRendererEventArgs(Graphics graphics, Rectangle clipRectangle, Rectangle bounds, Font font, KeyboardLayout layout)
|
|
|
|
|
|
{
|
|
|
|
|
|
Graphics = graphics;
|
|
|
|
|
|
ClipRectangle = clipRectangle;
|
|
|
|
|
|
Bounds = bounds;
|
|
|
|
|
|
Font = font;
|
|
|
|
|
|
Layout = layout;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
public class TopBarRendererEventArgs : EventArgs
|
|
|
|
|
|
{
|
|
|
|
|
|
public string Text { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
public Rectangle Bounds { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Gets a reference to the Graphics object to be used for rendering.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public Graphics Graphics { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Gets the rectangle in which to paint.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public Rectangle ClipRectangle { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Gets the font on the control.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public Font Font { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
public TopBarRendererEventArgs(Graphics graphics, Rectangle clipRectangle, Rectangle bounds, string text, Font font)
|
|
|
|
|
|
{
|
|
|
|
|
|
Graphics = graphics;
|
|
|
|
|
|
ClipRectangle = clipRectangle;
|
|
|
|
|
|
Bounds = bounds;
|
|
|
|
|
|
Text = text;
|
|
|
|
|
|
Font = font;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
public class CloseButtonRendererEventArgs : EventArgs
|
|
|
|
|
|
{
|
|
|
|
|
|
public Rectangle Bounds { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Gets a reference to the Key instance being rendered.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public Graphics Graphics { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Gets the area where background should be drawn.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public Rectangle ClipRectangle { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
/// <summary>
|
|
|
|
|
|
/// Gets a value indicating if this key is currently down.
|
|
|
|
|
|
/// </summary>
|
|
|
|
|
|
public bool IsDown { get; private set; }
|
|
|
|
|
|
|
|
|
|
|
|
public CloseButtonRendererEventArgs(Graphics graphics, bool isDown, Rectangle clipRectangle, Rectangle bounds)
|
|
|
|
|
|
{
|
|
|
|
|
|
Graphics = graphics;
|
|
|
|
|
|
ClipRectangle = clipRectangle;
|
|
|
|
|
|
Bounds = bounds;
|
|
|
|
|
|
IsDown = isDown;
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
}
|
