/// <summary>
/// Gets the button paint indices.
/// </summary>
/// <param name="button">The button paint info.</param>
/// <param name="active">A value indicating whether the button is active.</param>
/// <param name="buttonIndex">Index of the button icon image strip.</param>
/// <param name="rendererIndex">Index of the button background image strip.</param>
private static void GetButtonData(CaptionButtonPaintData button, bool active, out int buttonIndex, out int rendererIndex)
{
if (!button.Enabled)
{
rendererIndex = -1;
buttonIndex = 4;
}
else if (button.Pressed)
{
buttonIndex = active ? 2 : 3;
rendererIndex = 1;
}
else if (button.Hovered)
{
buttonIndex = active ? 1 : 3;
rendererIndex = 0;
}
else
{
buttonIndex = active ? 0 : 3;
rendererIndex = -1;
}
}
/// <summary>
/// Redraws the non client area.
/// </summary>
/// <param name="invalidateBuffer">if set to <c>true</c> the buffer is invalidated.</param>
/// <returns>true if the original painting should be suppressed otherwise false.</returns>
private bool NcPaint(bool invalidateBuffer)
{
if (!IsProcessNcArea)
return false;
bool result = false;
IntPtr hdc = (IntPtr)0;
Graphics g = null;
Region region = null;
IntPtr hrgn = (IntPtr)0;
try
{
// no drawing needed
if (_parentForm.MdiParent != null && _parentForm.WindowState == FormWindowState.Maximized)
{
_currentCacheSize = Size.Empty;
return false;
}
// prepare image bounds
Size borderSize = FormExtenders.GetBorderSize(_parentForm);
int captionHeight = FormExtenders.GetCaptionHeight(_parentForm);
RECT rectScreen = new RECT();
Win32Api.GetWindowRect(_parentForm.Handle, ref rectScreen);
Rectangle rectBounds = rectScreen.ToRectangle();
rectBounds.Offset(-rectBounds.X, -rectBounds.Y);
// prepare clipping
Rectangle rectClip = rectBounds;
region = new Region(rectClip);
rectClip.Inflate(-borderSize.Width, -borderSize.Height);
rectClip.Y += captionHeight;
rectClip.Height -= captionHeight;
// create graphics handle
hdc = Win32Api.GetDCEx(_parentForm.Handle, (IntPtr)0,
(DCXFlags.DCX_CACHE | DCXFlags.DCX_CLIPSIBLINGS | DCXFlags.DCX_WINDOW));
g = Graphics.FromHdc(hdc);
// Apply clipping
region.Exclude(rectClip);
hrgn = region.GetHrgn(g);
Win32Api.SelectClipRgn(hdc, hrgn);
// create new buffered graphics if needed
if (_bufferGraphics == null || _currentCacheSize != rectBounds.Size)
{
if (_bufferGraphics != null)
_bufferGraphics.Dispose();
_bufferGraphics = _bufferContext.Allocate(g, new Rectangle(0, 0,
rectBounds.Width, rectBounds.Height));
_currentCacheSize = rectBounds.Size;
invalidateBuffer = true;
}
if (invalidateBuffer)
{
// Create painting meta data for form
SkinningFormPaintData paintData = new SkinningFormPaintData(_bufferGraphics.Graphics, rectBounds)
{
Borders = borderSize,
CaptionHeight = captionHeight,
Active = _formIsActive,
HasMenu = FormExtenders.HasMenu(_parentForm),
IconSize = SystemInformation.SmallIconSize,
IsSmallCaption =
captionHeight ==
SystemInformation.ToolWindowCaptionHeight,
Text = _parentForm.Text
};
// create painting meta data for caption buttons
if (_captionButtons.Count > 0)
{
paintData.CaptionButtons = new CaptionButtonPaintData[_captionButtons.Count];
for (int i = 0; i < _captionButtons.Count; i++)
{
CaptionButton button = _captionButtons[i];
CaptionButtonPaintData buttonData = new CaptionButtonPaintData(_bufferGraphics.Graphics, button.Bounds)
{
Pressed = button.Pressed,
Hovered = button.Hovered,
Enabled = button.Enabled,
HitTest = button.HitTest
};
paintData.CaptionButtons[i] = buttonData;
}
}
// paint
result = _manager.CurrentSkin.OnNcPaint(_parentForm, paintData);
}
// render buffered graphics
if (_bufferGraphics != null)
_bufferGraphics.Render(g);
}
catch (Exception)
{// error drawing
result = false;
}
// cleanup data
if (hdc != (IntPtr)0)
{
Win32Api.SelectClipRgn(hdc, (IntPtr)0);
Win32Api.ReleaseDC(_parentForm.Handle, hdc);
}
if (region != null && hrgn != (IntPtr)0)
region.ReleaseHrgn(hrgn);
if (region != null)
region.Dispose();
if (g != null)
g.Dispose();
return result;
}
