protected virtual void OnPaintForeground(PaintEventArgs e)
{
base.ItemHeight = GetPreferredSize(Size.Empty).Height;
Color borderColor, foreColor;
if (isHovered && !isPressed && Enabled)
{
foreColor = WellsMetroPaint.ForeColor.ComboBox.Hover(Theme);
borderColor = WellsMetroPaint.BorderColor.ComboBox.Hover(Theme);
}
else if (isHovered && isPressed && Enabled)
{
foreColor = WellsMetroPaint.ForeColor.ComboBox.Press(Theme);
borderColor = WellsMetroPaint.BorderColor.ComboBox.Press(Theme);
}
else if (!Enabled)
{
foreColor = WellsMetroPaint.ForeColor.ComboBox.Disabled(Theme);
borderColor = WellsMetroPaint.BorderColor.ComboBox.Disabled(Theme);
}
else
{
//foreColor = WellsMetroPaint.ForeColor.ComboBox.Hover(Theme);
//borderColor = WellsMetroPaint.BorderColor.ComboBox.Hover(Theme);
foreColor = WellsMetroPaint.ForeColor.ComboBox.Normal(Theme);//normal是有个渐隐效果，感觉没必要，一直是黑的就行
borderColor = WellsMetroPaint.BorderColor.ComboBox.Normal(Theme);
}
using (Pen p = new Pen(borderColor))
{
Rectangle boxRect = new Rectangle(0, 0, Width - 1, Height - 1);
e.Graphics.DrawRectangle(p, boxRect);
}
using (SolidBrush b = new SolidBrush(foreColor))
{
e.Graphics.FillPolygon(b, new Point[] { new Point(Width - 20, (Height / 2) - 2), new Point(Width - 9, (Height / 2) - 2), new Point(Width - 15, (Height / 2) + 4) });
}
Rectangle textRect = new Rectangle(2, 2, Width - 20, Height - 4);
TextRenderer.DrawText(e.Graphics, Text, WellsMetroFonts.ComboBox(metroComboBoxSize, metroComboBoxWeight), textRect, foreColor, TextFormatFlags.Left | TextFormatFlags.VerticalCenter);
OnCustomPaintForeground(new WellsMetroPaintEventArgs(Color.Empty, foreColor, e.Graphics));
if (displayFocusRectangle && isFocused)
{
ControlPaint.DrawFocusRectangle(e.Graphics, ClientRectangle);
}
if (drawPrompt)
{
DrawTextPrompt(e.Graphics);
}
}
private void DrawTextPrompt(Graphics g)
{
Color backColor = BackColor;
if (!useCustomBackColor)
{
backColor = WellsMetroPaint.BackColor.Form(Theme);
}
Rectangle textRect = new Rectangle(2, 2, Width - 20, Height - 4);
TextRenderer.DrawText(g, promptText, WellsMetroFonts.ComboBox(metroComboBoxSize, metroComboBoxWeight), textRect, SystemColors.GrayText, backColor, TextFormatFlags.Left | TextFormatFlags.VerticalCenter | TextFormatFlags.EndEllipsis);
}
public override Size GetPreferredSize(Size proposedSize)
{
Size preferredSize;
base.GetPreferredSize(proposedSize);
using (var g = CreateGraphics())
{
string measureText = Text.Length > 0 ? Text : "MeasureText";
proposedSize = new Size(int.MaxValue, int.MaxValue);
preferredSize = TextRenderer.MeasureText(g, measureText, WellsMetroFonts.ComboBox(metroComboBoxSize, metroComboBoxWeight), proposedSize, TextFormatFlags.Left | TextFormatFlags.LeftAndRightPadding | TextFormatFlags.VerticalCenter);
preferredSize.Height += 4;
}
return(preferredSize);
}
protected override void OnDrawItem(DrawItemEventArgs e)
{
if (e.Index >= 0)
{
Color foreColor;
Color backColor = BackColor;
if (!useCustomBackColor)
{
backColor = WellsMetroPaint.BackColor.Form(Theme);
}
if (e.State == (DrawItemState.NoAccelerator | DrawItemState.NoFocusRect) || e.State == DrawItemState.None)
{
using (SolidBrush b = new SolidBrush(backColor))
{
e.Graphics.FillRectangle(b, new Rectangle(e.Bounds.Left, e.Bounds.Top, e.Bounds.Width, e.Bounds.Height));
}
foreColor = WellsMetroPaint.ForeColor.Link.Normal(Theme);
}
else
{
using (SolidBrush b = new SolidBrush(WellsMetroPaint.GetStyleColor(Style)))
{
e.Graphics.FillRectangle(b, new Rectangle(e.Bounds.Left, e.Bounds.Top, e.Bounds.Width, e.Bounds.Height));
}
foreColor = WellsMetroPaint.ForeColor.Tile.Normal(Theme);
}
Rectangle textRect = new Rectangle(0, e.Bounds.Top, e.Bounds.Width, e.Bounds.Height);
TextRenderer.DrawText(e.Graphics, GetItemText(Items[e.Index]), WellsMetroFonts.ComboBox(metroComboBoxSize, metroComboBoxWeight), textRect, foreColor, TextFormatFlags.Left | TextFormatFlags.VerticalCenter);
}
else
{
base.OnDrawItem(e);
}
}