void comboBox_DrawItem(object sender, DrawItemEventArgs e)
{
int colorRectangleWidth = e.Bounds.Height * 3 / 2;
// Draw the background of the item.
e.DrawBackground();
if (e.Index < 0)
{
return;
}
ColorAndText colorAndText = (ColorAndText)comboBox.Items[e.Index];
if (colorAndText.Color != null)
{
// Create a rectangle filled with the color.
Rectangle rectangle = new Rectangle(2, e.Bounds.Top + 2, colorRectangleWidth, e.Bounds.Height - 4);
e.Graphics.FillRectangle(new SolidBrush(SwopColorConverter.CmykToRgbColor(colorAndText.Color)), rectangle);
}
// Draw each string in the array, using a different size, color,
// and font for each item.
e.Graphics.DrawString(colorAndText.Text, e.Font, SystemBrushes.ControlText,
new RectangleF(e.Bounds.X + colorRectangleWidth + 4, e.Bounds.Y, e.Bounds.Width - (colorRectangleWidth + 4), e.Bounds.Height));
// Draw the focus rectangle if the mouse hovers over an item.
e.DrawFocusRectangle();
}
public LinePropertiesDialog(string dialogTitle, string usageText, string helpTopic, CmykColor purpleColor, CourseAppearance appearance)
{
InitializeComponent();
this.appearance = appearance;
if (!appearance.useDefaultPurple)
{
purpleColor = CmykColor.FromCmyk(appearance.purpleC, appearance.purpleM, appearance.purpleY, appearance.purpleK);
}
this.purpleColor = SwopColorConverter.CmykToRgbColor(purpleColor);
colorChooser = new SpecialColorChooser(comboBoxColor, buttonChangeColor, purpleColor);
colorChooser.ColorChanged += colorChooser_ColorChanged;
LineKind = PurplePen.LineKind.Single;
this.Text = dialogTitle;
this.HelpTopic = helpTopic;
usageLabel.Text = usageText;
}
private void pictureBoxPreview_Paint(object sender, PaintEventArgs e)
{
string expandedText = textExpander(this.UserText);
float emHeight = pictureBoxPreview.Height * 0.7F;
Color textColor = SwopColorConverter.CmykToRgbColor(colorChooser.CmykColor);
if (!checkBoxAutoFontSize.Checked)
{
emHeight = GetEmHeight(e.Graphics, this.FontName, this.FontStyle, (float)upDownFontSize.Value);
}
StringFormat stringFormat = new StringFormat(StringFormat.GenericDefault);
stringFormat.LineAlignment = StringAlignment.Center;
stringFormat.FormatFlags |= StringFormatFlags.NoWrap;
using (Font font = new Font(this.FontName, emHeight, this.FontStyle, GraphicsUnit.Pixel))
using (Brush brush = new SolidBrush(textColor)) {
e.Graphics.DrawString(expandedText, font, brush, pictureBoxPreview.ClientRectangle, stringFormat);
}
}
private void pictureBoxPreview_Paint(object sender, PaintEventArgs e)
{
e.Graphics.Clear(SwopColorConverter.CmykToRgbColor(Color));
}
private void pictureBoxPreview_Paint(object sender, PaintEventArgs e)
{
// Get the graphics, size to 10 mm high.
float scale = 10.0F / pictureBoxPreview.ClientSize.Height;
Graphics g = e.Graphics;
g.ScaleTransform(1 / scale, 1 / scale);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
// Get sizes and colors and so forth.
float controlLineWidth = NormalCourseAppearance.lineThickness * appearance.lineWidth;
float controlCircleDiameter = appearance.ControlCircleOutsideDiameter; // outside diameter
float controlDotDiameter = appearance.centerDotDiameter;
float controlCircleDrawRadius = (controlCircleDiameter - controlLineWidth) / 2; // radius to pen center
SpecialColor lineSpecialColor = this.Color;
Color lineColor;
if (lineSpecialColor.Kind == SpecialColor.ColorKind.Black)
{
lineColor = System.Drawing.Color.Black;
}
else if (lineSpecialColor.Kind == SpecialColor.ColorKind.Purple)
{
lineColor = purpleColor;
}
else
{
lineColor = SwopColorConverter.CmykToRgbColor(lineSpecialColor.CustomColor);
}
using (Brush purpleBrush = new SolidBrush(purpleColor))
using (Pen purplePen = new Pen(purpleColor, controlLineWidth))
using (Pen linePen = new Pen(lineColor, this.LineWidth))
{
// Create the pen to be correct for the style and so forth.
LineKind lineKind = this.LineKind;
linePen.StartCap = linePen.EndCap = System.Drawing.Drawing2D.LineCap.Flat;
if (lineKind == PurplePen.LineKind.Double)
{
linePen.Width = this.LineWidth * 2 + this.GapSize;
float widthFract = this.LineWidth / linePen.Width;
float gapFract = this.GapSize / linePen.Width;
linePen.CompoundArray = new float[4] {
0, widthFract, widthFract + gapFract, 1
};
}
else if (lineKind == PurplePen.LineKind.Dashed && this.DashSize > 0 && this.GapSize > 0)
{
linePen.DashCap = System.Drawing.Drawing2D.DashCap.Flat;
linePen.DashOffset = 0;
linePen.DashPattern = new float[2] {
this.DashSize / this.LineWidth, this.GapSize / this.LineWidth
};
}
// Draw control circle
PointF centerCircle = new PointF(5, 5);
g.DrawEllipse(purplePen, RectangleF.FromLTRB(centerCircle.X - controlCircleDrawRadius, centerCircle.Y - controlCircleDrawRadius, centerCircle.X + controlCircleDrawRadius, centerCircle.Y + controlCircleDrawRadius));
// Draw center dot.
if (controlDotDiameter > 0.0F)
{
g.FillEllipse(purpleBrush, RectangleF.FromLTRB(centerCircle.X - controlDotDiameter / 2, centerCircle.Y - controlDotDiameter / 2, centerCircle.X + controlDotDiameter / 2, centerCircle.Y + controlDotDiameter / 2));
}
// Draw legs
double angle = (Math.PI * 1.4);
g.DrawLine(purplePen, (float)(centerCircle.X + Math.Cos(angle) * 15), (float)(centerCircle.Y + Math.Sin(angle) * 15),
(float)(centerCircle.X + Math.Cos(angle) * controlCircleDrawRadius), (float)(centerCircle.Y + Math.Sin(angle) * controlCircleDrawRadius));
angle = (Math.PI * 0.8);
g.DrawLine(purplePen, (float)(centerCircle.X + Math.Cos(angle) * 15), (float)(centerCircle.Y + Math.Sin(angle) * 15),
(float)(centerCircle.X + Math.Cos(angle) * controlCircleDrawRadius), (float)(centerCircle.Y + Math.Sin(angle) * controlCircleDrawRadius));
// Draw line
PointF lineStart = new PointF(12, -5), lineCorner = new PointF(12, 5), lineEnd = new PointF(100, 5);
using (GraphicsPath path = new GraphicsPath()) {
if (!this.showRadius)
{
// Line, not rectangle. Just show line.
path.AddLine(lineCorner, lineEnd);
}
else if (this.CornerRadius > 0)
{
const float kappa = 0.5522847498F; // constant used to create near-circle with a bezier.
PointF roundStart = new PointF(lineCorner.X, lineCorner.Y - CornerRadius);
PointF roundEnd = new PointF(lineCorner.X + CornerRadius, lineCorner.Y);
PointF control1 = new PointF(lineCorner.X, lineCorner.Y - (1 - kappa) * CornerRadius);
PointF control2 = new PointF(lineCorner.X + (1 - kappa) * CornerRadius, lineCorner.Y);
path.AddLine(lineStart, roundStart);
path.AddBezier(roundStart, control1, control2, roundEnd);
path.AddLine(roundEnd, lineEnd);
}
else
{
// No corner radius.
path.AddLine(lineStart, lineCorner);
path.AddLine(lineCorner, lineEnd);
}
try {
g.DrawPath(linePen, path);
}
catch (Exception) {
// Do nothing. Very occasionally, GDI+ given an overflow exception or ExternalException or OutOfMemory exception.
// Just ignore it; there's nothing else to do. See bug #1997301.
}
}
}
}
