/// <summary>
/// Renders the pager text using the results of SetupPagerText.
/// </summary>
protected virtual void RenderPagerText(Cairo.Context context, Pango.Layout layout, Gdk.Rectangle bounds)
{
int w, h;
layout.GetPixelSize(out w, out h);
context.MoveTo(bounds.X + (bounds.Width - w) / 2, bounds.Y + (bounds.Height - h) / 2);
context.Color = PagerTextColor;
PangoCairoHelper.ShowLayout(context, layout);
layout.Dispose();
}
public static Pango.Layout CreateLayout(Gtk.Widget widget, Cairo.Context cairo_context)
{
Pango.Layout layout = PangoCairoHelper.CreateLayout(cairo_context);
layout.FontDescription = widget.PangoContext.FontDescription.Copy();
double resolution = widget.Screen.Resolution;
if (resolution != -1)
{
Pango.Context context = PangoCairoHelper.LayoutGetContext(layout);
PangoCairoHelper.ContextSetResolution(context, resolution);
context.Dispose();
}
return(layout);
}
//FIXME: respect damage regions not just the whole areas, and skip more work when possible
protected override bool OnExposeEvent(Gdk.EventExpose evnt)
{
if (sections.Count == 0)
{
return(false);
}
var alloc = Allocation;
int bw = (int)BorderWidth;
double halfLineWidth = borderLineWidth / 2.0;
int bw2 = bw * 2;
int w = alloc.Width - bw2;
int h = alloc.Height - bw2;
using (var cr = CairoHelper.Create(evnt.Window)) {
CairoHelper.Region(cr, evnt.Region);
cr.Clip();
cr.Translate(alloc.X + bw, alloc.Y + bw);
var borderCol = Convert(Style.Dark(StateType.Normal));
cr.SetSourceColor(borderCol);
cr.Rectangle(halfLineWidth, halfLineWidth, w - borderLineWidth, h - borderLineWidth);
cr.LineWidth = borderLineWidth;
cr.Stroke();
cr.Translate(borderLineWidth, borderLineWidth);
w = w - (2 * borderLineWidth);
using (LinearGradient unselectedGrad = new LinearGradient(0, 0, 0, headerHeight),
hoverGrad = new LinearGradient(0, 0, 0, headerHeight),
selectedGrad = new LinearGradient(0, 0, 0, headerHeight)
)
{
var unselectedCol = Convert(Style.Mid(StateType.Normal));
var unselectedTextCol = Convert(Style.Text(StateType.Normal));
unselectedCol.A = 0.6;
unselectedGrad.AddColorStop(0, unselectedCol);
unselectedCol.A = 1;
unselectedGrad.AddColorStop(1, unselectedCol);
var hoverCol = Convert(Style.Mid(StateType.Prelight));
var hoverTextCol = Convert(Style.Text(StateType.Prelight));
hoverCol.A = 0.6;
hoverGrad.AddColorStop(0, unselectedCol);
hoverCol.A = 1;
hoverGrad.AddColorStop(1, unselectedCol);
var selectedCol = Convert(Style.Mid(StateType.Normal));
var selectedTextCol = Convert(Style.Text(StateType.Normal));
selectedCol.A = 0.6;
selectedGrad.AddColorStop(0, selectedCol);
selectedCol.A = 1;
selectedGrad.AddColorStop(1, selectedCol);
for (int i = 0; i < sections.Count; i++)
{
var section = sections[i];
bool isActive = activeIndex == i;
bool isHover = hoverIndex == i;
cr.Rectangle(0, 0, w, headerHeight);
cr.SetSource(isActive? selectedGrad : (isHover? hoverGrad : unselectedGrad));
cr.Fill();
cr.SetSourceColor(isActive? selectedTextCol : (isHover? hoverTextCol : unselectedTextCol));
layout.SetText(section.Title);
layout.Ellipsize = Pango.EllipsizeMode.End;
layout.Width = (int)((w - headerPadding - headerPadding) * Pango.Scale.PangoScale);
cr.MoveTo(headerPadding, headerPadding);
PangoCairoHelper.ShowLayout(cr, layout);
cr.MoveTo(-halfLineWidth, i > activeIndex? -halfLineWidth : headerHeight + halfLineWidth);
cr.RelLineTo(w + borderLineWidth, 0.0);
cr.SetSourceColor(borderCol);
cr.Stroke();
cr.Translate(0, headerHeight + borderLineWidth);
if (isActive)
{
cr.Translate(0, section.Child.Allocation.Height + borderLineWidth);
}
}
}
}
PropagateExpose(sections[activeIndex].Child, evnt);
return(true); // base.OnExposeEvent (evnt);
}
protected override bool OnExposeEvent(EventExpose evnt)
{
using (var ctx = Gdk.CairoHelper.Create(GdkWindow)) {
ctx.Rectangle(0, 0, Allocation.Width, Allocation.Height);
using (var g = new Cairo.LinearGradient(0, 0, 0, Allocation.Height)) {
g.AddColorStop(0, Styles.BreadcrumbBackgroundColor);
g.AddColorStop(1, Styles.BreadcrumbGradientEndColor);
ctx.SetSource(g);
}
ctx.Fill();
if (widths == null)
{
return(true);
}
// Calculate the total required with, and the reduction to be applied in case it doesn't fit the available space
int totalWidth = widths.Sum();
totalWidth += leftPadding + (arrowSize + arrowRightPadding) * leftPath.Length - 1;
totalWidth += rightPadding + arrowSize * rightPath.Length - 1;
int[] currentWidths = widths;
bool widthReduced = false;
int overflow = totalWidth - Allocation.Width;
if (overflow > 0)
{
currentWidths = ReduceWidths(overflow);
widthReduced = true;
}
// Render the paths
int textTopPadding = topPadding + (height - textHeight) / 2;
int xpos = leftPadding, ypos = topPadding;
for (int i = 0; i < leftPath.Length; i++)
{
bool last = i == leftPath.Length - 1;
// Reduce the item size when required
int itemWidth = currentWidths [i];
int x = xpos;
xpos += itemWidth;
if (hoverIndex >= 0 && hoverIndex < Path.Length && leftPath [i] == Path [hoverIndex] && (menuVisible || pressed || hovering))
{
DrawButtonBorder(ctx, x - padding, itemWidth + padding + padding);
}
int textOffset = 0;
if (leftPath [i].DarkIcon != null)
{
int iy = (height - leftPath [i].DarkIcon.Height) / 2 + topPadding;
Gdk.CairoHelper.SetSourcePixbuf(ctx, leftPath [i].DarkIcon, x, iy);
ctx.Paint();
textOffset += leftPath [i].DarkIcon.Width + iconSpacing;
}
layout.Attributes = (i == activeIndex) ? boldAtts : null;
layout.SetMarkup(leftPath [i].Markup);
ctx.Save();
// If size is being reduced, ellipsize it
bool showText = true;
if (widthReduced)
{
int w = itemWidth - textOffset;
if (w > 0)
{
ctx.Rectangle(x + textOffset, textTopPadding, w, height);
ctx.Clip();
}
else
{
showText = false;
}
}
else
{
layout.Width = -1;
}
if (showText)
{
// Text
ctx.SetSourceColor(Styles.BreadcrumbTextColor.ToCairoColor());
ctx.MoveTo(x + textOffset, textTopPadding);
PangoCairoHelper.ShowLayout(ctx, layout);
}
ctx.Restore();
if (!last)
{
xpos += arrowLeftPadding;
if (leftPath [i].IsPathEnd)
{
Style.PaintVline(Style, GdkWindow, State, evnt.Area, this, "", ypos, ypos + height, xpos - arrowSize / 2);
}
else
{
int arrowH = Math.Min(height, arrowSize);
int arrowY = ypos + (height - arrowH) / 2;
DrawPathSeparator(ctx, xpos, arrowY, arrowH);
}
xpos += arrowSize + arrowRightPadding;
}
}
int xposRight = Allocation.Width - rightPadding;
for (int i = 0; i < rightPath.Length; i++)
{
// bool last = i == rightPath.Length - 1;
// Reduce the item size when required
int itemWidth = currentWidths [i + leftPath.Length];
xposRight -= itemWidth;
xposRight -= arrowSize;
int x = xposRight;
if (hoverIndex >= 0 && hoverIndex < Path.Length && rightPath [i] == Path [hoverIndex] && (menuVisible || pressed || hovering))
{
DrawButtonBorder(ctx, x - padding, itemWidth + padding + padding);
}
int textOffset = 0;
if (rightPath [i].DarkIcon != null)
{
Gdk.CairoHelper.SetSourcePixbuf(ctx, rightPath [i].DarkIcon, x, ypos);
ctx.Paint();
textOffset += rightPath [i].DarkIcon.Width + padding;
}
layout.Attributes = (i == activeIndex) ? boldAtts : null;
layout.SetMarkup(rightPath [i].Markup);
ctx.Save();
// If size is being reduced, ellipsize it
bool showText = true;
if (widthReduced)
{
int w = itemWidth - textOffset;
if (w > 0)
{
ctx.Rectangle(x + textOffset, textTopPadding, w, height);
ctx.Clip();
}
else
{
showText = false;
}
}
else
{
layout.Width = -1;
}
if (showText)
{
// Text
ctx.SetSourceColor(Styles.BreadcrumbTextColor.ToCairoColor());
ctx.MoveTo(x + textOffset, textTopPadding);
PangoCairoHelper.ShowLayout(ctx, layout);
}
ctx.Restore();
}
ctx.MoveTo(0, Allocation.Height - 0.5);
ctx.RelLineTo(Allocation.Width, 0);
ctx.SetSourceColor(Styles.BreadcrumbBottomBorderColor);
ctx.LineWidth = 1;
ctx.Stroke();
}
return(true);
}