/// <summary>Internal method for rendering an individual <paramref name="tab" /> to the screen.</summary>
/// <param name="graphicsContext">Graphics context to use when rendering the tab.</param>
/// <param name="tab">Individual tab that we are to render.</param>
/// <param name="area">Area of the screen that the tab should be rendered to.</param>
/// <param name="cursor">Current position of the cursor.</param>
protected virtual void Render(Graphics graphicsContext, TitleBarTab tab, Rectangle area, Point cursor)
{
if (_suspendRendering)
{
return;
}
// If we need to redraw the tab image
if (tab.TabImage == null)
{
// We render the tab to an internal property so that we don't necessarily have to redraw it in every rendering pass, only if its width or
// status have changed
tab.TabImage = new Bitmap(
area.Width, tab.Active
? _activeCenterImage.Height
: _inactiveCenterImage.Height);
using (Graphics tabGraphicsContext = Graphics.FromImage(tab.TabImage))
{
// Draw the left, center, and right portions of the tab
tabGraphicsContext.DrawImage(
tab.Active
? _activeLeftSideImage
: _inactiveLeftSideImage, new Rectangle(
0, 0, tab.Active
? _activeLeftSideImage
.Width
: _inactiveLeftSideImage
.Width,
tab.Active
? _activeLeftSideImage.
Height
: _inactiveLeftSideImage
.Height), 0, 0,
tab.Active
? _activeLeftSideImage.Width
: _inactiveLeftSideImage.Width, tab.Active
? _activeLeftSideImage.Height
: _inactiveLeftSideImage.Height,
GraphicsUnit.Pixel);
tabGraphicsContext.DrawImage(
tab.Active
? _activeCenterImage
: _inactiveCenterImage, new Rectangle(
(tab.Active
? _activeLeftSideImage.
Width
: _inactiveLeftSideImage
.Width), 0,
_tabContentWidth, tab.Active
? _activeCenterImage
.
Height
: _inactiveCenterImage
.
Height),
0, 0, _tabContentWidth, tab.Active
? _activeCenterImage.Height
: _inactiveCenterImage.Height,
GraphicsUnit.Pixel);
tabGraphicsContext.DrawImage(
tab.Active
? _activeRightSideImage
: _inactiveRightSideImage, new Rectangle(
(tab.Active
? _activeLeftSideImage
.Width
: _inactiveLeftSideImage
.Width) +
_tabContentWidth, 0,
tab.Active
? _activeRightSideImage
.Width
: _inactiveRightSideImage
.Width,
tab.Active
? _activeRightSideImage
.Height
: _inactiveRightSideImage
.Height), 0, 0,
tab.Active
? _activeRightSideImage.Width
: _inactiveRightSideImage.Width, tab.Active
? _activeRightSideImage.Height
: _inactiveRightSideImage.
Height,
GraphicsUnit.Pixel);
// Draw the close button
if (tab.ShowCloseButton)
{
Image closeButtonImage = IsOverCloseButton(tab, cursor)
? _closeButtonHoverImage
: _closeButtonImage;
tab.CloseButtonArea = new Rectangle(
area.Width - (tab.Active
? _activeRightSideImage.Width
: _inactiveRightSideImage.Width) -
CloseButtonMarginRight - closeButtonImage.Width,
CloseButtonMarginTop, closeButtonImage.Width,
closeButtonImage.Height);
tabGraphicsContext.DrawImage(
closeButtonImage, tab.CloseButtonArea, 0, 0,
closeButtonImage.Width, closeButtonImage.Height,
GraphicsUnit.Pixel);
}
}
tab.Area = area;
}
// Render the tab's saved image to the screen
graphicsContext.DrawImage(
tab.TabImage, area, 0, 0, tab.TabImage.Width, tab.TabImage.Height,
GraphicsUnit.Pixel);
// Render the icon for the tab's content, if it exists and there's room for it in the tab's content area
if (tab.Content.ShowIcon && _tabContentWidth > 16 + IconMarginLeft + (tab.ShowCloseButton
? CloseButtonMarginLeft +
tab.CloseButtonArea.Width +
CloseButtonMarginRight
: 0))
{
graphicsContext.DrawIcon(
new Icon(tab.Content.Icon, 16, 16),
new Rectangle(area.X + OverlapWidth + IconMarginLeft, IconMarginTop + area.Y, 16, 16));
}
// Render the caption for the tab's content if there's room for it in the tab's content area
if (_tabContentWidth > (tab.Content.ShowIcon
? 16 + IconMarginLeft + IconMarginRight
: 0) + CaptionMarginLeft + CaptionMarginRight + (tab.ShowCloseButton
? CloseButtonMarginLeft +
tab.CloseButtonArea.Width +
CloseButtonMarginRight
: 0))
{
graphicsContext.DrawString(
tab.Caption, SystemFonts.CaptionFont, Brushes.Black,
new Rectangle(
area.X + OverlapWidth + CaptionMarginLeft + (tab.Content.ShowIcon
? IconMarginLeft +
16 +
IconMarginRight
: 0),
CaptionMarginTop + area.Y,
_tabContentWidth - (tab.Content.ShowIcon
? IconMarginLeft + 16 + IconMarginRight
: 0) - (tab.ShowCloseButton
? _closeButtonImage.Width +
CloseButtonMarginRight +
CloseButtonMarginLeft
: 0), tab.TabImage.Height),
new StringFormat(StringFormatFlags.NoWrap)
{
Trimming = StringTrimming.EllipsisCharacter
});
}
}
