/// <summary>
/// Updates the caption.
/// </summary>
private void UpdateCaption()
{
// create buttons
if (_captionButtons.Count == 0)
{
_captionButtons.Add(new CaptionButton(HitTest.HTCLOSE));
if (FormExtenders.IsDrawMaximizeBox(_parentForm))
{
var button = new CaptionButton(HitTest.HTMAXBUTTON);
// disable button if it is disabled on form.
button.Enabled = _parentForm.MaximizeBox;
_captionButtons.Add(button);
}
if (FormExtenders.IsDrawMinimizeBox(_parentForm))
{
var button = new CaptionButton(HitTest.HTMINBUTTON);
// disable button if it is disabled on form.
button.Enabled = _parentForm.MinimizeBox;
_captionButtons.Add(button);
}
// TODO: Add help button if enabled to all skins.
// add command handlers
foreach (var button in _captionButtons)
{
button.PropertyChanged += OnCommandButtonPropertyChanged;
}
}
// Calculate Caption Button Bounds
var rectScreen = new RECT();
Win32Api.GetWindowRect(_parentForm.Handle, ref rectScreen);
var rect = rectScreen.ToRectangle();
var borderSize = FormExtenders.GetBorderSize(_parentForm);
rect.Offset(-rect.Left, -rect.Top);
var captionButtonSize = FormExtenders.GetCaptionButtonSize(_parentForm);
var buttonRect = new Rectangle(rect.Right - borderSize.Width - captionButtonSize.Width,
rect.Top + borderSize.Height,
captionButtonSize.Width, captionButtonSize.Height);
foreach (var button in _captionButtons)
{
button.Bounds = buttonRect;
buttonRect.X -= captionButtonSize.Width;
}
}
/// <summary>
/// Performs the non client HitTest
/// </summary>
/// <param name="m">The Message</param>
/// <returns>true if the orginal handler should be suppressed otherwise false.</returns>
private bool NcHitTest(ref Message m)
{
if (!IsProcessNcArea)
{
return(false);
}
Point point = new Point(m.LParam.ToInt32());
Rectangle rectScreen = FormExtenders.GetScreenRect(_parentForm);
Rectangle rect = rectScreen;
// custom processing
if (rect.Contains(point))
{
Size borderSize = FormExtenders.GetBorderSize(_parentForm);
rect.Inflate(-borderSize.Width, -borderSize.Height);
// let form handle hittest itself if we are on borders
if (!rect.Contains(point))
{
return(false);
}
Rectangle rectCaption = rect;
rectCaption.Height = FormExtenders.GetCaptionHeight(_parentForm);
// not in caption -> client
if (!rectCaption.Contains(point))
{
m.Result = (IntPtr)(int)HitTest.HTCLIENT;
return(true);
}
// on icon?
if (FormExtenders.HasMenu(_parentForm))
{
Rectangle rectSysMenu = rectCaption;
rectSysMenu.Size = SystemInformation.SmallIconSize;
if (rectSysMenu.Contains(point))
{
m.Result = (IntPtr)(int)HitTest.HTSYSMENU;
return(true);
}
}
// on Button?
Point pt = new Point(point.X - rectScreen.X, point.Y - rectScreen.Y);
CaptionButton sysButton = CommandButtonFromPoint(pt);
if (sysButton != null)
{
m.Result = (IntPtr)sysButton.HitTest;
return(true);
}
// on Caption?
m.Result = (IntPtr)(int)HitTest.HTCAPTION;
return(true);
}
m.Result = (IntPtr)(int)HitTest.HTNOWHERE;
return(true);
}
/// <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);
}
