//
// GroupBoxRenderer.cs
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Copyright (c) 2006 Novell, Inc.
//
// Authors:
// Jonathan Pobst (monkey@jpobst.com)
//
using System.Drawing;
using System.Windows.Forms.VisualStyles;
namespace System.Windows.Forms{
#if NET_2_0
public
#endif
sealed class GroupBoxRenderer
{
private static bool always_use_visual_styles = false;
#region Private Constructor
private GroupBoxRenderer () { }
#endregion
#region Public Static Methods
public static void DrawGroupBox (Graphics g, Rectangle bounds, GroupBoxState state)
{
DrawGroupBox (g, bounds, String.Empty, null, Color.Empty, TextFormatFlags.Default, state);
}
public static void DrawGroupBox (Graphics g, Rectangle bounds, string groupBoxText, Font font, GroupBoxState state)
{
DrawGroupBox (g, bounds, groupBoxText, font, Color.Empty, TextFormatFlags.Default, state);
}
public static void DrawGroupBox (Graphics g, Rectangle bounds, string groupBoxText, Font font, Color textColor, GroupBoxState state)
{
DrawGroupBox (g, bounds, groupBoxText, font, textColor, TextFormatFlags.Default, state);
}
public static void DrawGroupBox (Graphics g, Rectangle bounds, string groupBoxText, Font font, TextFormatFlags flags, GroupBoxState state)
{
DrawGroupBox (g, bounds, groupBoxText, font, Color.Empty, flags, state);
}
public static void DrawGroupBox (Graphics g, Rectangle bounds, string groupBoxText, Font font, Color textColor, TextFormatFlags flags, GroupBoxState state)
{
Size font_size = TextRenderer.MeasureText (groupBoxText, font);
if (Application.RenderWithVisualStyles || always_use_visual_styles == true) {
VisualStyleRenderer vsr;
Rectangle new_bounds;
switch (state) {
case GroupBoxState.Normal:
default:
vsr = new VisualStyleRenderer (VisualStyleElement.Button.GroupBox.Normal);
new_bounds = new Rectangle (bounds.Left, bounds.Top + (int)(font_size.Height / 2) - 1, bounds.Width, bounds.Height - (int)(font_size.Height / 2) + 1);
break;
case GroupBoxState.Disabled:
vsr = new VisualStyleRenderer (VisualStyleElement.Button.GroupBox.Disabled);
new_bounds = new Rectangle (bounds.Left, bounds.Top + (int)(font_size.Height / 2) - 2, bounds.Width, bounds.Height - (int)(font_size.Height / 2) + 2);
break;
}
if (groupBoxText == String.Empty)
vsr.DrawBackground (g, bounds);
else
vsr.DrawBackgroundExcludingArea (g, new_bounds, new Rectangle (bounds.Left + 9, bounds.Top, font_size.Width - 3, font_size.Height));
if (textColor == Color.Empty)
textColor = vsr.GetColor (ColorProperty.TextColor);
if (groupBoxText != String.Empty)
TextRenderer.DrawText (g, groupBoxText, font, new Point (bounds.Left + 8, bounds.Top), textColor, flags);
}
else {
// MS has a pretty big bug when rendering the non-visual styles group box. Instead of using the height
// part of the bounds as height, they use it as the bottom, so the boxes are drawn in completely different
// places. Rather than emulate this bug, we do it correctly. After googling for a while, I don't think
// anyone has ever actually used this class for anything, so it should be fine. :)
Rectangle new_bounds = new Rectangle (bounds.Left, bounds.Top + (int)(font_size.Height / 2), bounds.Width, bounds.Height - (int)(font_size.Height / 2));
// Don't paint over the background where we are going to put the text
Region old_clip = g.Clip;
g.SetClip (new Rectangle (bounds.Left + 9, bounds.Top, font_size.Width - 3, font_size.Height), System.Drawing.Drawing2D.CombineMode.Exclude);
ControlPaint.DrawBorder3D (g, new_bounds, Border3DStyle.Etched);
g.Clip = old_clip;
if (groupBoxText != String.Empty) {
if (textColor == Color.Empty)
textColor = state == GroupBoxState.Normal ? SystemColors.ControlText :
SystemColors.GrayText;
TextRenderer.DrawText (g, groupBoxText, font, new Point (bounds.Left + 8, bounds.Top), textColor, flags);
}
}
}
public static bool IsBackgroundPartiallyTransparent (GroupBoxState state)
{
if (!VisualStyleRenderer.IsSupported)
return false;
VisualStyleRenderer vsr;
switch (state) {
case GroupBoxState.Normal:
default:
vsr = new VisualStyleRenderer (VisualStyleElement.Button.GroupBox.Normal);
break;
case GroupBoxState.Disabled:
vsr = new VisualStyleRenderer (VisualStyleElement.Button.GroupBox.Disabled);
break;
}
return vsr.IsBackgroundPartiallyTransparent ();
}
public static void DrawParentBackground (Graphics g, Rectangle bounds, Control childControl)
{
if (!VisualStyleRenderer.IsSupported)
return;
VisualStyleRenderer vsr = new VisualStyleRenderer (VisualStyleElement.Button.GroupBox.Normal);
vsr.DrawParentBackground (g, bounds, childControl);
}
#endregion
#region Public Static Properties
public static bool RenderMatchingApplicationState {
get { return !always_use_visual_styles; }
set { always_use_visual_styles = !value; }
}
#endregion
}
}
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