/// <summary>
/// Ensure that the window doesn't overlap docked toolbars on desktop (like taskbar)
/// </summary>
/// <param name="m">The message.</param>
/// <returns></returns>
private bool CalculateMaxSize(ref Message m)
{
if (_owner.SkiningForm.Parent == null)
{
// create minMax info for maximize data
MINMAXINFO info = (MINMAXINFO)m.GetLParam(typeof(MINMAXINFO));
Rectangle rect = SystemInformation.WorkingArea;
Size fullBorderSize = new Size(SystemInformation.Border3DSize.Width + SystemInformation.BorderSize.Width,
SystemInformation.Border3DSize.Height + SystemInformation.BorderSize.Height);
info.ptMaxPosition.x = rect.Left - fullBorderSize.Width;
info.ptMaxPosition.y = rect.Top - fullBorderSize.Height;
info.ptMaxSize.x = rect.Width + fullBorderSize.Width * 2;
info.ptMaxSize.y = rect.Height + fullBorderSize.Height * 2;
info.ptMinTrackSize.y += FormExtenders.GetCaptionHeight(_owner.SkiningForm);
if (!_owner.SkiningForm.MaximumSize.IsEmpty)
{
info.ptMaxSize.x = Math.Min(info.ptMaxSize.x, _owner.SkiningForm.MaximumSize.Width);
info.ptMaxSize.y = Math.Min(info.ptMaxSize.y, _owner.SkiningForm.MaximumSize.Height);
info.ptMaxTrackSize.x = Math.Min(info.ptMaxTrackSize.x, _owner.SkiningForm.MaximumSize.Width);
info.ptMaxTrackSize.y = Math.Min(info.ptMaxTrackSize.y, _owner.SkiningForm.MaximumSize.Height);
}
if (!_owner.SkiningForm.MinimumSize.IsEmpty)
{
info.ptMinTrackSize.x = Math.Max(info.ptMinTrackSize.x, _owner.SkiningForm.MinimumSize.Width);
info.ptMinTrackSize.y = Math.Max(info.ptMinTrackSize.y, _owner.SkiningForm.MinimumSize.Height);
}
// set wished maximize size
Marshal.StructureToPtr(info, m.LParam, true);
m.Result = (IntPtr)0;
return(true);
}
return(false);
}
protected override void WndProc(ref Message m)
{
bool supressOriginalMessage = false;
if (IsProcessNcArea)
{
switch ((Win32Messages)m.Msg)
{
// update form data on style change
case Win32Messages.STYLECHANGED:
_owner.Skin.UpdateStyle();
if (_owner.Skin != null)
{
_owner.Skin.OnSetRegion(_owner.SkiningForm.Size);
}
break;
#region Handle Form Activation
case Win32Messages.ACTIVATEAPP:
// redraw
if (_owner.Skin != null)
{
_owner.Skin.FormIsActive = (int)m.WParam != 0;
}
_owner.Skin.OnNcPaint(true);
break;
case Win32Messages.ACTIVATE:
// Set active state and redraw
_owner.Skin.FormIsActive = ((int)WAFlags.WA_ACTIVE == (int)m.WParam || (int)WAFlags.WA_CLICKACTIVE == (int)m.WParam);
_owner.Skin.OnNcPaint(true);
break;
case Win32Messages.MDIACTIVATE:
// set active and redraw on activation
if (m.WParam == _owner.SkiningForm.Handle)
{
_owner.Skin.FormIsActive = false;
}
else if (m.LParam == _owner.SkiningForm.Handle)
{
_owner.Skin.FormIsActive = true;
}
_owner.Skin.OnNcPaint(true);
break;
#endregion
#region Handle Mouse Processing
// Set Pressed button on mousedown
case Win32Messages.NCLBUTTONDOWN:
supressOriginalMessage = _owner.Skin.OnMouseDown(ref m);
break;
// Set hovered button on mousemove
case Win32Messages.NCMOUSEMOVE:
_owner.Skin.OnMouseMove(ref m);
break;
// perform button actions if a button was clicked
case Win32Messages.NCLBUTTONUP:
// Handle button up
supressOriginalMessage = _owner.Skin.OnMouseUp(m);
break;
// restore button states on mouseleave
case Win32Messages.NCMOUSELEAVE:
case Win32Messages.MOUSELEAVE:
case Win32Messages.MOUSEHOVER:
_owner.Skin.OnMouseLeave();
break;
#endregion
#region Size Processing
// Set region as window is shown
case Win32Messages.SHOWWINDOW:
if (_owner.Skin != null)
{
_owner.Skin.OnSetRegion(_owner.SkiningForm.Size);
}
break;
// adjust region on resize
case Win32Messages.SIZE:
_owner.Skin.OnSize(m);
break;
// ensure that the window doesn't overlap docked toolbars on desktop (like taskbar)
case Win32Messages.GETMINMAXINFO:
supressOriginalMessage = CalculateMaxSize(ref m);
break;
// update region on resize
case Win32Messages.WINDOWPOSCHANGING:
WINDOWPOS wndPos = (WINDOWPOS)m.GetLParam(typeof(WINDOWPOS));
if ((wndPos.flags & (int)SWPFlags.SWP_NOSIZE) == 0)
{
if (_owner.Skin != null)
{
_owner.Skin.OnSetRegion(new Size(wndPos.cx, wndPos.cy));
}
}
break;
// remove region on maximize or repaint on resize
case Win32Messages.WINDOWPOSCHANGED:
if (_owner.SkiningForm.WindowState == FormWindowState.Maximized)
{
_owner.SkiningForm.Region = null;
}
WINDOWPOS wndPos2 = (WINDOWPOS)m.GetLParam(typeof(WINDOWPOS));
if ((wndPos2.flags & (int)SWPFlags.SWP_NOSIZE) == 0)
{
_owner.Skin.UpdateCaption();
_owner.Skin.OnNcPaint(true);
}
break;
#endregion
#region Non Client Area Handling
// paint the non client area
case Win32Messages.NCPAINT:
if (_owner.Skin.OnNcPaint(true))
{
m.Result = (IntPtr)1;
supressOriginalMessage = true;
}
break;
// calculate the non client area size
case Win32Messages.NCCALCSIZE:
if (m.WParam == (IntPtr)1)
{
if (_owner.SkiningForm.MdiParent != null)
{
break;
}
// add caption height to non client area
NCCALCSIZE_PARAMS p = (NCCALCSIZE_PARAMS)m.GetLParam(typeof(NCCALCSIZE_PARAMS));
p.rect0.Top += FormExtenders.GetCaptionHeight(_owner.SkiningForm);
Marshal.StructureToPtr(p, m.LParam, true);
}
break;
// non client hit test
case Win32Messages.NCHITTEST:
if (_owner.Skin.OnNcHitTest(ref m))
{
supressOriginalMessage = true;
}
break;
#endregion
}
}
if (!supressOriginalMessage)
{
base.WndProc(ref m);
}
}
protected internal override bool OnNcPaint(SkinningFormPaintData paintData)
{
if (SkiningForm == null)
{
return(false);
}
bool isMaximized = SkiningForm.WindowState == FormWindowState.Maximized;
bool isMinimized = SkiningForm.WindowState == FormWindowState.Minimized;
// prepare bounds
Rectangle windowBounds = paintData.BaseData.Bounds;
windowBounds.Location = Point.Empty;
Rectangle captionBounds = windowBounds;
Size borderSize = paintData.Borders;
captionBounds.Height = borderSize.Height + paintData.CaptionHeight;
Rectangle textBounds = captionBounds;
Rectangle iconBounds = captionBounds;
iconBounds.Inflate(-borderSize.Width, 0);
iconBounds.Y += borderSize.Height;
iconBounds.Height -= borderSize.Height;
// Draw Caption
bool active = paintData.Active;
_skinSetting._formCaption.Draw(paintData.BaseData.Graphics, captionBounds, active ? 0 : 1);
// Paint Icon
if (paintData.HasMenu && SkiningForm.Icon != null)
{
iconBounds.Size = paintData.IconSize;
Icon tmpIcon = new Icon(SkiningForm.Icon, paintData.IconSize);
iconBounds.Y = captionBounds.Y + (captionBounds.Height - iconBounds.Height) / 2;
paintData.BaseData.Graphics.DrawIcon(tmpIcon, iconBounds);
textBounds.X = iconBounds.Right;
iconBounds.Width -= iconBounds.Right;
}
// Paint Icons
foreach (CaptionButtonPaintData data in paintData.CaptionButtons)
{
ControlPaintHelper painter = paintData.IsSmallCaption ? _skinSetting._formCaptionButtonSmall : _skinSetting._formCaptionButton;
// Get Indices for imagestrip
int iconIndex = 0;
int backgroundIndex = 0;
FormExtenders.GetButtonData(data, paintData.Active, out iconIndex, out backgroundIndex);
// get imageStrip for button icon
ImageStrip iconStrip;
switch (data.HitTest)
{
case HitTest.HTCLOSE:
iconStrip = paintData.IsSmallCaption ? _skinSetting._formCloseIconSmall : _skinSetting._formCloseIcon;
break;
case HitTest.HTMAXBUTTON:
if (isMaximized)
{
iconStrip = paintData.IsSmallCaption ? _skinSetting._formRestoreIconSmall : _skinSetting._formRestoreIcon;
}
else
{
iconStrip = paintData.IsSmallCaption ? _skinSetting._formMaximizeIconSmall : _skinSetting._formMaximizeIcon;
}
break;
case HitTest.HTMINBUTTON:
if (isMinimized)
{
iconStrip = paintData.IsSmallCaption ? _skinSetting._formRestoreIconSmall : _skinSetting._formRestoreIcon;
}
else
{
iconStrip = paintData.IsSmallCaption ? _skinSetting._formMinimizeIconSmall : _skinSetting._formMinimizeIcon;
}
break;
default:
continue;
}
// draw background
if (backgroundIndex >= 0)
{
painter.Draw(paintData.BaseData.Graphics, data.BaseData.Bounds, backgroundIndex);
}
// draw Icon
Rectangle b = data.BaseData.Bounds;
b.Y += 1;
if (iconIndex >= 0)
{
iconStrip.Draw(paintData.BaseData.Graphics, iconIndex, b, Rectangle.Empty,
DrawingAlign.Center, DrawingAlign.Center);
}
// Ensure textbounds
textBounds.Width -= data.BaseData.Bounds.Width;
}
// draw text
if (!string.IsNullOrEmpty(paintData.Text) && !textBounds.IsEmpty)
{
TextFormatFlags flags = TextFormatFlags.VerticalCenter | TextFormatFlags.EndEllipsis | TextFormatFlags.PreserveGraphicsClipping;
if (_skinSetting._formIsTextCentered)
{
flags = flags | TextFormatFlags.HorizontalCenter;
}
Font font = paintData.IsSmallCaption ? SystemFonts.SmallCaptionFont : SystemFonts.CaptionFont;
TextRenderer.DrawText(paintData.BaseData.Graphics, paintData.Text, font, textBounds,
paintData.Active ? _skinSetting._formActiveTitleColor : _skinSetting._formInactiveTitleColor, flags);
}
// exclude caption area from painting
Region region = paintData.BaseData.Graphics.Clip;
region.Exclude(captionBounds);
paintData.BaseData.Graphics.Clip = region;
// Paint borders and corners
_skinSetting._formBorder.DrawFrame(paintData.BaseData.Graphics, windowBounds, paintData.Active ? 0 : 1);
paintData.BaseData.Graphics.ResetClip();
return(true);
}
