Update Cairo samples for the latest API changes
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2 changed files with 24 additions and 18 deletions
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@ -33,16 +33,19 @@ class CairoSample : DrawingArea
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int CHECK_SIZE = 32;
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cr.Save ();
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Surface check = cr.Target.CreateSimilar (Content.Color, 2 * CHECK_SIZE, 2 * CHECK_SIZE);
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Surface check;
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using (var target = cr.GetTarget ()) {
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check = target.CreateSimilar (Content.Color, 2 * CHECK_SIZE, 2 * CHECK_SIZE);
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}
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// draw the check
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using (Context cr2 = new Context (check)) {
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cr2.Operator = Operator.Source;
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cr2.Color = new Color (0.4, 0.4, 0.4);
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cr2.SetSourceRGB (0.4, 0.4, 0.4);
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cr2.Rectangle (0, 0, 2 * CHECK_SIZE, 2 * CHECK_SIZE);
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cr2.Fill ();
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cr2.Color = new Color (0.7, 0.7, 0.7);
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cr2.SetSourceRGB (0.7, 0.7, 0.7);
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cr2.Rectangle (x, y, CHECK_SIZE, CHECK_SIZE);
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cr2.Fill ();
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@ -53,12 +56,12 @@ class CairoSample : DrawingArea
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// Fill the whole surface with the check
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SurfacePattern check_pattern = new SurfacePattern (check);
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check_pattern.Extend = Extend.Repeat;
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cr.Source = check_pattern;
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cr.SetSource (check_pattern);
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cr.Rectangle (0, 0, width, height);
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cr.Fill ();
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check_pattern.Destroy ();
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check.Destroy ();
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check_pattern.Dispose ();
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check.Dispose ();
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cr.Restore ();
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}
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@ -66,15 +69,15 @@ class CairoSample : DrawingArea
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{
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double subradius = radius * (2 / 3.0 - 0.1);
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cr.Color = new Color (1.0, 0.0, 0.0, alpha);
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cr.SetSourceRGBA (1.0, 0.0, 0.0, alpha);
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OvalPath (cr, xc + radius / 3.0 * Math.Cos (Math.PI * 0.5), yc - radius / 3.0 * Math.Sin (Math.PI * 0.5), subradius, subradius);
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cr.Fill ();
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cr.Color = new Color (0.0, 1.0, 0.0, alpha);
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cr.SetSourceRGBA (0.0, 1.0, 0.0, alpha);
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OvalPath (cr, xc + radius / 3.0 * Math.Cos (Math.PI * (0.5 + 2 / 0.3)), yc - radius / 3.0 * Math.Sin (Math.PI * (0.5 + 2 / 0.3)), subradius, subradius);
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cr.Fill ();
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cr.Color = new Color (0.0, 0.0, 1.0, alpha);
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cr.SetSourceRGBA (0.0, 0.0, 1.0, alpha);
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OvalPath (cr, xc + radius / 3.0 * Math.Cos (Math.PI * (0.5 + 4 / 0.3)), yc - radius / 3.0 * Math.Sin (Math.PI * (0.5 + 4 / 0.3)), subradius, subradius);
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cr.Fill ();
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}
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@ -85,16 +88,19 @@ class CairoSample : DrawingArea
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int xc = width / 2;
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int yc = height / 2;
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Surface overlay = cr.Target.CreateSimilar (Content.ColorAlpha, width, height);
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Surface punch = cr.Target.CreateSimilar (Content.Alpha, width, height);
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Surface circles = cr.Target.CreateSimilar (Content.ColorAlpha, width, height);
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Surface overlay, punch, circles;
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using (var target = cr.GetTarget ()) {
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overlay = target.CreateSimilar (Content.ColorAlpha, width, height);
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punch = target.CreateSimilar (Content.Alpha, width, height);
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circles = target.CreateSimilar (Content.ColorAlpha, width, height);
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}
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FillChecks (cr, 0, 0, width, height);
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cr.Save ();
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// Draw a black circle on the overlay
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using (Context cr_overlay = new Context (overlay)) {
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cr_overlay.Color = new Color (0.0, 0.0, 0.0);
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cr_overlay.SetSourceRGB (0.0, 0.0, 0.0);
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OvalPath (cr_overlay, xc, yc, radius, radius);
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cr_overlay.Fill ();
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@ -123,9 +129,9 @@ class CairoSample : DrawingArea
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cr.SetSourceSurface (overlay, 0, 0);
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cr.Paint ();
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overlay.Destroy ();
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punch.Destroy ();
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circles.Destroy ();
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overlay.Dispose ();
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punch.Dispose ();
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circles.Dispose ();
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}
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protected override bool OnDrawn (Cairo.Context ctx)
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@ -140,7 +140,7 @@ namespace GtkDemo
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Widget widget = o as Widget;
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if (surface != null)
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surface.Destroy ();
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surface.Dispose ();
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var allocation = widget.Allocation;
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