protected override void OnPaint(PaintEventArgs e)
{
Rectangle rect = GeometryHelper.ApplyPadding(ClientRectangle, Padding);
if (IsPressed)
{
rect = GeometryHelper.ApplyPadding(rect, PressExpansion);
}
StringFormat format = new StringFormat()
{
Alignment = StringAlignment.Center,
LineAlignment = StringAlignment.Center
};
using (Pen borderPen = new Pen(IsPressed ? PressedBorderColor : BorderColor, BorderWidth))
e.Graphics.DrawRectangle(borderPen, rect);
using (Brush fgBrush = new SolidBrush(IsPressed ? PressedForeColor : ForeColor))
e.Graphics.DrawString(Text, Font, fgBrush, rect, format);
base.OnPaint(e);
}
protected override void OnPaintBackground(PaintEventArgs e)
{
base.OnPaintBackground(e);
using (Brush brush = new SolidBrush(IsPressed ? PressedBackColor : BackColor))
e.Graphics.FillRectangle(brush, IsPressed ? GeometryHelper.ApplyPadding(ClientRectangle, PressExpansion) : ClientRectangle);
}
protected virtual RectangleF GetScrollThumbRectangle()
{
int areaLength = GeometryHelper.GetDimension(ClientRectangle, Orientation) - 2 * GeometryHelper.GetDimension(ButtonSize, Orientation);
float thumbLength = areaLength * areaLength / (float)ScrollDistance;
float offset = ScrollValue / (float)ScrollDistance * (areaLength - thumbLength) + GeometryHelper.GetDimension(ButtonSize, Orientation);
switch (Orientation)
{
case Orientation.Horizontal:
return(new RectangleF(
ClientRectangle.Left + offset,
ClientRectangle.Top,
thumbLength,
Thickness
));
case Orientation.Vertical:
return(new RectangleF(
ClientRectangle.Left,
ClientRectangle.Top + offset,
Thickness,
thumbLength
));
}
throw new NotSupportedException();
}
protected virtual void DrawItem(Item item, Graphics g, Rectangle bounds)
{
bool isSelected = (item == SelectedItem);
if (!isSelected)
{
bounds = GeometryHelper.ApplyPadding(bounds, SelectionExpansion);
}
using (Brush bgBrush = new SolidBrush(isSelected ? SelectedItemBackColor : BackColor))
g.FillRectangle(bgBrush, bounds);
using (Pen borderPen = new Pen(isSelected ? SelectedItemBorderColor : ItemBorderColor, ItemBorderWidth))
g.DrawRectangle(borderPen, bounds);
const int margin = 5;
bounds = GeometryHelper.ApplyPadding(bounds, new Padding(margin));
StringFormat format = new StringFormat()
{
Alignment = StringAlignment.Near,
LineAlignment = StringAlignment.Center
};
int xOffset = 0;
int yOffset = 0;
if (ShowImages)
{
Size imageSize = new Size(bounds.Height, bounds.Height);
if (item.Image != null)
{
g.DrawImage(item.Image, new Rectangle(bounds.Location, imageSize));
}
xOffset += imageSize.Width + margin;
}
if (ShowTitles)
{
float height = ShowDetails ? 0.25f * bounds.Height : bounds.Height;
RectangleF textRect = new RectangleF(bounds.Left + xOffset, bounds.Top + yOffset, bounds.Width - xOffset, height);
using (Brush brush = new SolidBrush(ForeColor))
g.DrawString(item.Title, TitleFont, brush, textRect, format);
yOffset += (int)height + margin;
}
if (ShowDetails)
{
RectangleF textRect = new RectangleF(
bounds.Left + xOffset,
bounds.Top + yOffset,
bounds.Width - xOffset,
bounds.Height - yOffset
);
format.LineAlignment = StringAlignment.Near;
using (Brush brush = new SolidBrush(ForeColor))
g.DrawString(item.Details, Font, brush, textRect, format);
}
}
protected override void OnMouseMove(MouseEventArgs e)
{
if (isDragging)
{
int pixelDistance = GeometryHelper.GetDimension(e.Location, Orientation) - GeometryHelper.GetDimension(lastDraggingPoint, Orientation);
int areaLength = GeometryHelper.GetDimension(ClientSize, Orientation) - 2 * GeometryHelper.GetDimension(ButtonSize, Orientation);
int scrollDelta = (int)(pixelDistance / (float)areaLength * ScrollDistance);
ScrollValue = Math.Min(Math.Max(ScrollValue + scrollDelta, MinimumValue), MaximumValue);
lastDraggingPoint = e.Location;
}
base.OnMouseMove(e);
}
