bool OnSelectionExposeEvent(EventExpose evnt)
{
if (selection == Rectangle.Zero)
{
return(false);
}
Rectangle win_selection = ImageCoordsToWindow(selection);
using (var evnt_region = evnt.Region.Copy()) {
using (Region r = new Region()) {
r.UnionWithRect(win_selection);
evnt_region.Subtract(r);
}
using (Cairo.Context ctx = CairoHelper.Create(GdkWindow)) {
ctx.SetSourceRGBA(.5, .5, .5, .7);
CairoHelper.Region(ctx, evnt_region);
ctx.Fill();
}
}
return(true);
}
//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);
}