public CustomCheckBoxAdapter(CustomCheckBoxRenderer renderer)
{
Verify.Argument.IsNotNull(renderer, "renderer");
_checkBox = new CustomCheckBox()
{
Renderer = renderer,
};
_checkBox.IsCheckedChanged += OnCheckBoxIsCheckedChanged;
_checkBox.CheckStateChanged += OnCheckBoxCheckStateChanged;
}
public override void Render(Graphics graphics, Rectangle clipRectangle, CustomCheckBox checkBox)
{
const int CheckBoxSize = 16;
using (var brush = new SolidBrush(checkBox.BackColor))
{
graphics.FillRectangle(brush, clipRectangle);
}
bool highlight;
Color foregroundColor;
if (checkBox.Enabled)
{
highlight = checkBox.IsMouseOver || checkBox.Focused;
foregroundColor = highlight ? ColorTable.ForegroundHighlight : ColorTable.Foreground;
}
else
{
highlight = false;
foregroundColor = ColorTable.ForegroundDisabled;
}
var rcCheckBox = new Rectangle(1, 1 + (checkBox.Height - CheckBoxSize) / 2, CheckBoxSize - 2, CheckBoxSize - 2);
using (var brush = new SolidBrush(highlight ? ColorTable.CheckBackgroundHighlight : ColorTable.CheckBackground))
{
graphics.FillRectangle(brush, rcCheckBox);
}
rcCheckBox.X -= 1;
rcCheckBox.Y -= 1;
rcCheckBox.Width += 1;
rcCheckBox.Height += 1;
if (highlight)
{
using (var pen = new Pen(ColorTable.CheckHighlight))
{
graphics.DrawRectangle(pen, rcCheckBox);
}
}
switch (checkBox.CheckState)
{
case CheckState.Checked:
{
var path = new Point[]
{
new Point(4, 7 + rcCheckBox.Y),
new Point(6, 10 + rcCheckBox.Y),
new Point(11, 3 + rcCheckBox.Y),
};
var mode = graphics.SmoothingMode;
graphics.SmoothingMode = SmoothingMode.HighQuality;
using (var pen = new Pen(foregroundColor, 1.7f))
{
graphics.DrawLines(pen, path);
}
graphics.SmoothingMode = mode;
}
break;
case CheckState.Indeterminate:
{
var rect = new Rectangle(rcCheckBox.X + 5, rcCheckBox.Y + 5, rcCheckBox.Width - 9, rcCheckBox.Height - 9);
using (var brush = new SolidBrush(foregroundColor))
{
graphics.FillRectangle(brush, rect);
}
}
break;
}
int textOffset = 16;
if (checkBox.Image != null)
{
var image = checkBox.Image;
textOffset += image.Width + 4;
graphics.DrawImage(image, new Rectangle(16 + 3, (checkBox.Height - image.Height) / 2, image.Width, image.Height));
}
var text = checkBox.Text;
if (!string.IsNullOrWhiteSpace(text))
{
TextRenderer.DrawText(
graphics,
text,
checkBox.Font,
new Rectangle(textOffset, 0, checkBox.Width - textOffset, checkBox.Height),
foregroundColor,
TextFormatFlags.VerticalCenter | TextFormatFlags.EndEllipsis);
}
}
public abstract void Render(Graphics graphics, Rectangle clipRectangle, CustomCheckBox checkBox);