private void DrawColorEntryMarker(Graphics graphics, Point point, Size size, Color color, Color borderColor)
{
Point[] markerPoints = new Point[5];
markerPoints[0] = new Point(point.X, point.Y);
markerPoints[1] = new Point(point.X + size.Width / 2, point.Y + size.Width / 2);
markerPoints[2] = new Point(point.X + size.Width / 2, point.Y + size.Height - 1);
markerPoints[3] = new Point(point.X - size.Width / 2, point.Y + size.Height - 1);
markerPoints[4] = new Point(point.X - size.Width / 2, point.Y + size.Width / 2);
Brush b = new SolidBrush(borderColor);
graphics.FillPolygon(b, markerPoints);
b.Dispose();
Pen p = new Pen(borderColor);
graphics.DrawPolygon(p, markerPoints);
p.Dispose();
Rectangle rect = new Rectangle(point.X - size.Width / 2 + 1, point.Y + size.Width / 2 + 1, size.Width - 2, size.Height - size.Width / 2 - 2);
Gradient.FillCheckerboardRectangle(graphics, rect, rect.Width / 3);
b = new SolidBrush(color);
graphics.FillRectangle(b, rect);
b.Dispose();
}
private void DrawGradient()
{
Graphics graphics = Graphics.FromImage(gradientPanelBackBuffer);
graphics.Clear(gradientPanel.BackColor);
if (CurrentGradient != null)
{
Gradient.FillCheckerboardRectangle(graphics, gradientRectangle, 8);
CurrentGradient.Draw(graphics, gradientRectangle, 0.0, 1.0, Gradient.Direction.Horizontal);
graphics.DrawRectangle(Pens.Black, new Rectangle(gradientRectangle.Left - 1, gradientRectangle.Top - 1, gradientRectangle.Width + 2, gradientRectangle.Height + 1));
DrawColorEntryMarkers();
RefreshGradientList(true);
}
graphics.Dispose();
}
protected override void OnDrawItem(DrawItemEventArgs ea)
{
if (ea.Index != -1 && Items.Count > 0)
{
Gradient item = (Gradient)Items[ea.Index];
Bitmap backBufferBitmap = new Bitmap(ea.Bounds.Width, ea.Bounds.Height);
Graphics backBufferGraphics = Graphics.FromImage(backBufferBitmap);
backBufferGraphics.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
Brush b = new SolidBrush(BackColor);
ea.Graphics.FillRectangle(b, ea.Bounds);
b.Dispose();
ea.DrawBackground();
Rectangle rect = new Rectangle(4, 4, backBufferBitmap.Width - this.NameWidth - 4, backBufferBitmap.Height - 8);
Gradient.FillCheckerboardRectangle(backBufferGraphics, rect, 3);
item.Draw(backBufferGraphics, rect, 0, 1, Gradient.Direction.Horizontal);
backBufferGraphics.DrawRectangle(Pens.Black, new Rectangle(3, 3, backBufferBitmap.Width - this.NameWidth - 3, backBufferBitmap.Height - 7));
Color textColor;
if ((ea.State & DrawItemState.Selected).Equals(DrawItemState.Selected))
{
textColor = SystemColors.HighlightText;
}
else
{
textColor = this.ForeColor;
}
Size textSize = TextRenderer.MeasureText(backBufferGraphics, item.Name, this.Font);
Point textLocation = new Point(backBufferBitmap.Width - this.NameWidth + this.NamePadding, (ea.Bounds.Height - textSize.Height) / 2);
TextRenderer.DrawText(backBufferGraphics, item.Name, this.Font, textLocation, textColor);
ea.Graphics.DrawImage(backBufferBitmap, ea.Bounds.Location);
backBufferBitmap.Dispose();
backBufferGraphics.Dispose();
ea.DrawFocusRectangle();
base.OnDrawItem(ea);
}
}
private void DrawColorRange(Graphics graphics, Font colorRangeScaleFont, RouteLineSettings routeLineSettings, Brush colorRangeScaleBrush)
{
// draw the color range
// calculate various sizes
var sf = new StringFormat();
var colorRangeSize = new Size(Math.Max(100, Math.Min(300, Image.Width - 300)), 16);
var colorRangeScaleLabelMaxSize =
graphics.MeasureString(Properties.ColorRangeProperties.NumericConverter.ToString((double?)Properties.ColorRangeProperties.ScaleCreator.LastMarkerValue),
colorRangeScaleFont);
var colorRangeScaleUnitSize = graphics.MeasureString(" " + Properties.ColorRangeProperties.ScaleUnit, colorRangeScaleFont);
var colorRangeRectangle =
new Rectangle(
new Point(
Image.Width - exportImageBorderWidth - 16 - (int)colorRangeScaleUnitSize.Width -
(int)colorRangeScaleLabelMaxSize.Width / 2 - colorRangeSize.Width, 20), colorRangeSize);
// checkerboard background for color range
Gradient.FillCheckerboardRectangle(graphics, colorRangeRectangle, 8);
// color range
routeLineSettings.ColorRange.Gradient.Draw(graphics, colorRangeRectangle, 0, 1, Gradient.Direction.Horizontal,
routeLineSettings.AlphaAdjustment);
// color range scale markers and labels
var lastX = 0;
for (var value = Properties.ColorRangeProperties.ScaleCreator.FirstMarkerValue;
value <= Properties.ColorRangeProperties.ScaleCreator.LastMarkerValue;
value += Properties.ColorRangeProperties.ScaleCreator.MarkerInterval)
{
var x = colorRangeRectangle.Left +
(int)
((value - routeLineSettings.ColorRange.StartValue) /
(routeLineSettings.ColorRange.EndValue - routeLineSettings.ColorRange.StartValue) *
colorRangeRectangle.Width);
var p = new Pen(Color.FromArgb(192, Color.Black));
graphics.DrawLine(p, x, colorRangeRectangle.Top, x, colorRangeRectangle.Bottom);
p.Dispose();
// draw label string, but only if the space is sufficient
if (value == Properties.ColorRangeProperties.ScaleCreator.FirstMarkerValue || x - lastX > colorRangeScaleLabelMaxSize.Width)
{
sf.Alignment = StringAlignment.Center;
sf.LineAlignment = StringAlignment.Near;
graphics.DrawString(Properties.ColorRangeProperties.NumericConverter.ToString((double?)value), colorRangeScaleFont, colorRangeScaleBrush, x,
colorRangeRectangle.Bottom + 2F, sf);
lastX = x;
}
}
// color range border
graphics.DrawRectangle(Pens.Gray,
new Rectangle(colorRangeRectangle.Left - 1, colorRangeRectangle.Top - 1,
colorRangeRectangle.Width + 2, colorRangeRectangle.Height + 1));
// color range scale strings
// caption
sf.Alignment = StringAlignment.Far;
sf.LineAlignment = StringAlignment.Near;
graphics.DrawString(Properties.ColorRangeProperties.ScaleCaption + " ", colorRangeScaleFont, colorRangeScaleBrush,
colorRangeRectangle.Left - colorRangeScaleLabelMaxSize.Width / 2F, colorRangeRectangle.Bottom + 2F, sf);
// unit
sf.Alignment = StringAlignment.Near;
sf.LineAlignment = StringAlignment.Near;
graphics.DrawString(" " + Properties.ColorRangeProperties.ScaleUnit, colorRangeScaleFont, colorRangeScaleBrush,
colorRangeRectangle.Right + colorRangeScaleLabelMaxSize.Width / 2F, colorRangeRectangle.Bottom + 2F, sf);
}
private void Draw()
{
if (backBufferGraphics == null || preventRedraw)
{
return;
}
// use backbuffering
Graphics g = backBufferGraphics;
// clear background
g.Clear(BackColor);
// gradient
double intervalLength = (colorRange.EndValue - colorRange.StartValue);
double startLocation = 0.0 - (colorRange.StartValue - minValue) / intervalLength;
double endLocation = 1.0 + (maxValue - colorRange.EndValue) / intervalLength;
Gradient.FillCheckerboardRectangle(g, colorRangeRectangle, 8);
ColorRange.Gradient.Draw(g, colorRangeRectangle, startLocation, endLocation, Gradient.Direction.Horizontal, alphaAdjustment);
// start value slider
DrawSlider(new Point(ValueToX(colorRange.StartValue), colorRangeRectangle.Bottom + 1));
// end value slider
DrawSlider(new Point(ValueToX(colorRange.EndValue), colorRangeRectangle.Bottom + 1));
// border
g.DrawRectangle(Pens.Gray, new Rectangle(colorRangeRectangle.Left - 1, colorRangeRectangle.Top - 1, colorRangeRectangle.Width + 1, colorRangeRectangle.Height + 1));
// marker lines and labels
SizeF labelSize;
int startY;
if (NumericConverter == null)
{
labelSize = new SizeF(0F, 0F);
startY = colorRangeRectangle.Top;
}
else
{
labelSize = g.MeasureString(NumericConverter.ToString(scaleCreator.LastMarkerValue) + " ", Font);
startY = colorRangeRectangle.Top + (int)labelSize.Height;
}
float lastLabelX = (float)colorRangeRectangle.Left - labelSize.Width / 2;
for (double value = scaleCreator.FirstMarkerValue; value <= scaleCreator.LastMarkerValue; value += scaleCreator.MarkerInterval)
{
Pen p = new Pen(Color.FromArgb(192, Color.Black));
g.DrawLine(
p,
(int)ValueToX(value),
startY,
ValueToX(value),
(int)colorRangeRectangle.Bottom
);
p.Dispose();
if (NumericConverter != null)
{
float labelX = (float)ValueToX(value);
// only draw label if it is enough space to the last one
if (labelX > lastLabelX + labelSize.Width && labelX + labelSize.Width / 2 < (float)colorRangeRectangle.Right)
{
g.DrawString(
" " + NumericConverter.ToString(value),
Font,
Brushes.Black,
new PointF(labelX - labelSize.Width / 2, (float)colorRangeRectangle.Top)
);
lastLabelX = labelX;
}
}
}
// copy to screen
sliderPanel.CreateGraphics().DrawImageUnscaled(backBufferBitmap, new Point(0, 0));
}
