sample: Port all existing GtkDemo samples to the new APIs
The following samples crash because of an issue with the new Drawn handler: ColorSelection, DrawingArea and Pixbuf. The rest seem to work OK.
This commit is contained in:
Bertrand Lorentz
parent
9d7eec2eca
commit
3a2f01c534
13 changed files with 85 additions and 122 deletions
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@ -192,7 +192,7 @@ namespace GtkDemo
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protected override bool OnWindowStateEvent (Gdk.EventWindowState evt)
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{
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if ((evt.ChangedMask & (Gdk.WindowState.Maximized | Gdk.WindowState.Fullscreen)) != 0)
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statusbar.HasResizeGrip = (evt.NewWindowState & (Gdk.WindowState.Maximized | Gdk.WindowState.Fullscreen)) == 0;
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HasResizeGrip = (evt.NewWindowState & (Gdk.WindowState.Maximized | Gdk.WindowState.Fullscreen)) == 0;
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return false;
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}
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@ -14,7 +14,7 @@ namespace GtkDemo
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[Demo ("Color Selection", "DemoColorSelection.cs")]
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public class DemoColorSelection : Gtk.Window
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{
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private Gdk.Color color;
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private Gdk.RGBA color;
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private Gtk.DrawingArea drawingArea;
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public DemoColorSelection () : base ("Color Selection")
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@ -30,19 +30,22 @@ namespace GtkDemo
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vbox.PackStart (frame, true, true, 0);
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drawingArea = new DrawingArea ();
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drawingArea.ExposeEvent += new ExposeEventHandler (ExposeEventCallback);
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drawingArea.Drawn += new DrawnHandler (DrawnCallback);
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// set a minimum size
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drawingArea.SetSizeRequest (200,200);
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// set the color
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color = new Gdk.Color (0, 0, 0xff);
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drawingArea.ModifyBg (StateType.Normal, color);
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color.Red = 0;
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color.Green = 0;
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color.Blue = 1;
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color.Alpha = 1;
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drawingArea.OverrideBackgroundColor (StateFlags.Normal, color);
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frame.Add (drawingArea);
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Alignment alignment = new Alignment (1.0f, 0.5f, 0.0f, 0.0f);
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Button button = new Button ("_Change the above color");
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button.Clicked += new EventHandler (ChangeColorCallback);
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alignment.Add (button);
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vbox.PackStart (alignment);
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vbox.PackStart (alignment, false, false, 0);
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ShowAll ();
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}
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@ -53,17 +56,15 @@ namespace GtkDemo
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return true;
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}
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// Expose callback for the drawing area
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private void ExposeEventCallback (object o, ExposeEventArgs args)
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// Drawn callback for the drawing area
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private void DrawnCallback (object o, DrawnArgs args)
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{
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EventExpose eventExpose = args.Event;
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Gdk.Window window = eventExpose.Window;
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Rectangle area = eventExpose.Area;
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Cairo.Context cr = args.Cr;
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Gdk.RGBA rgba = StyleContext.GetBackgroundColor (StateFlags.Normal);
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cr.SetSourceRGBA (rgba.Red, rgba.Green, rgba.Blue, rgba.Alpha);
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cr.Paint ();
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window.DrawRectangle (drawingArea.Style.BackgroundGC (StateType.Normal),
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true,
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area.X, area.Y,
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area.Width, area.Height);
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args.RetVal = true;
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}
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@ -71,13 +72,13 @@ namespace GtkDemo
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{
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using (ColorSelectionDialog colorSelectionDialog = new ColorSelectionDialog ("Changing color")) {
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colorSelectionDialog.TransientFor = this;
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colorSelectionDialog.ColorSelection.PreviousColor = color;
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colorSelectionDialog.ColorSelection.CurrentColor = color;
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colorSelectionDialog.ColorSelection.SetPreviousRgba (color);
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colorSelectionDialog.ColorSelection.CurrentRgba = color;
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colorSelectionDialog.ColorSelection.HasPalette = true;
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if (colorSelectionDialog.Run () == (int) ResponseType.Ok) {
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Gdk.Color selected = colorSelectionDialog.ColorSelection.CurrentColor;
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drawingArea.ModifyBg (StateType.Normal, selected);
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Gdk.RGBA selected = colorSelectionDialog.ColorSelection.CurrentRgba;
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drawingArea.OverrideBackgroundColor (StateFlags.Normal, selected);
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}
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colorSelectionDialog.Hide ();
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@ -94,7 +94,7 @@ namespace GtkDemo
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HBox hbox = new HBox (false, 8);
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hbox.BorderWidth = 8;
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dialog.VBox.PackStart (hbox, false, false, 0);
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dialog.ContentArea.PackStart (hbox, false, false, 0);
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Image stock = new Image (Stock.DialogQuestion, IconSize.Dialog);
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hbox.PackStart (stock, false, false, 0);
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@ -22,7 +22,7 @@ namespace GtkDemo
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[Demo ("Drawing Area", "DemoDrawingArea.cs")]
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public class DemoDrawingArea : Gtk.Window
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{
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private Pixmap pixmap = null;
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private Cairo.Surface surface = null;
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public DemoDrawingArea () : base ("Drawing Area")
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{
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@ -45,7 +45,7 @@ namespace GtkDemo
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// set a minimum size
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da.SetSizeRequest (100,100);
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frame.Add (da);
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da.ExposeEvent += new ExposeEventHandler (CheckerboardExpose);
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da.Drawn += new DrawnHandler (CheckerboardDrawn);
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// Create the scribble area
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label = new Label ("<u>Scribble area</u>");
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@ -62,7 +62,7 @@ namespace GtkDemo
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frame.Add (da);
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// Signals used to handle backing pixmap
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da.ExposeEvent += new ExposeEventHandler (ScribbleExpose);
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da.Drawn += new DrawnHandler (ScribbleDrawn);
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da.ConfigureEvent += new ConfigureEventHandler (ScribbleConfigure);
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// Event signals
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@ -84,25 +84,21 @@ namespace GtkDemo
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return true;
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}
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private void CheckerboardExpose (object o, ExposeEventArgs args)
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private void CheckerboardDrawn (object o, DrawnArgs args)
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{
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const int CheckSize = 10;
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const int Spacing = 2;
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DrawingArea da = o as DrawingArea;
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// It would be a bit more efficient to keep these
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// GC's around instead of recreating on each expose, but
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// this is the lazy/slow way.
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Gdk.GC gc1 = new Gdk.GC (da.GdkWindow);
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gc1.RgbFgColor = new Gdk.Color (117, 0, 117);
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Gdk.GC gc2 = new Gdk.GC (da.GdkWindow);
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gc2.RgbFgColor = new Gdk.Color (255, 255, 255);
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Widget widget = o as Widget;
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Cairo.Context cr = args.Cr;
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int i, j, xcount, ycount;
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Gdk.Rectangle alloc = da.Allocation;
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// At the start of a draw handler, a clip region has been set on
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// the Cairo context, and the contents have been cleared to the
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// widget's background color.
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Rectangle alloc = widget.Allocation;
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// Start redrawing the Checkerboard
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xcount = 0;
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i = Spacing;
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@ -110,13 +106,12 @@ namespace GtkDemo
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j = Spacing;
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ycount = xcount % 2; // start with even/odd depending on row
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while (j < alloc.Height) {
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Gdk.GC gc;
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if (ycount % 2 != 0)
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gc = gc1;
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cr.SetSourceRGB (0.45777, 0, 0.45777);
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else
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gc = gc2;
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da.GdkWindow.DrawRectangle (gc, true, i, j,
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CheckSize, CheckSize);
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cr.SetSourceRGB (1, 1, 1);
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// If we're outside the clip, this will do nothing.
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cr.Rectangle (i, j, CheckSize, CheckSize);
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j += CheckSize + Spacing;
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++ycount;
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@ -130,33 +125,29 @@ namespace GtkDemo
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args.RetVal = true;
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}
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private void ScribbleExpose (object o, ExposeEventArgs args)
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private void ScribbleDrawn (object o, DrawnArgs args)
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{
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Widget widget = o as Widget;
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Gdk.Window window = widget.GdkWindow;
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Rectangle area = args.Event.Area;
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Cairo.Context cr = args.Cr;
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// We use the "ForegroundGC" for the widget since it already exists,
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// but honestly any GC would work. The only thing to worry about
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// is whether the GC has an inappropriate clip region set.
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window.DrawDrawable (widget.Style.ForegroundGC (StateType.Normal),
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pixmap,
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area.X, area.Y,
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area.X, area.Y,
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area.Width, area.Height);
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cr.SetSourceSurface (surface, 0, 0);
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cr.Paint ();
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}
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// Create a new pixmap of the appropriate size to store our scribbles
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// Create a new surface of the appropriate size to store our scribbles
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private void ScribbleConfigure (object o, ConfigureEventArgs args)
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{
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Widget widget = o as Widget;
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Rectangle allocation = widget.Allocation;
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pixmap = new Pixmap (widget.GdkWindow, allocation.Width, allocation.Height, -1);
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if (surface != null)
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surface.Destroy ();
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// Initialize the pixmap to white
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pixmap.DrawRectangle (widget.Style.WhiteGC, true, 0, 0,
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allocation.Width, allocation.Height);
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var allocation = widget.Allocation;
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surface = widget.Window.CreateSimilarSurface (Cairo.Content.Color, allocation.Width, allocation.Height);
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var cr = new Cairo.Context (surface);
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cr.Paint ();
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((IDisposable)cr).Dispose ();
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// We've handled the configure event, no need for further processing.
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args.RetVal = true;
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@ -166,7 +157,7 @@ namespace GtkDemo
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{
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// paranoia check, in case we haven't gotten a configure event
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if (pixmap == null)
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if (surface == null)
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return;
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// This call is very important; it requests the next motion event.
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@ -192,19 +183,21 @@ namespace GtkDemo
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// Draw a rectangle on the screen
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private void DrawBrush (Widget widget, double x, double y)
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{
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Rectangle update_rect = new Rectangle ((int)x - 3, (int)y - 3, 6, 6);
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var update_rect = new Gdk.Rectangle ((int)x - 3, (int)y - 3, 6, 6);
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var cr = new Cairo.Context (surface);
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// Paint to the pixmap, where we store our state
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pixmap.DrawRectangle (widget.Style.BlackGC, true,
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update_rect.X, update_rect.Y,
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update_rect.Width, update_rect.Height);
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widget.GdkWindow.InvalidateRect (update_rect, false);
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cr.Fill ();
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Gdk.CairoHelper.Rectangle (cr, update_rect);
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((IDisposable)cr).Dispose ();
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widget.Window.InvalidateRect (update_rect, false);
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}
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private void ScribbleButtonPress (object o, ButtonPressEventArgs args)
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{
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// paranoia check, in case we haven't gotten a configure event
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if (pixmap == null)
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if (surface == null)
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return;
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EventButton ev = args.Event;
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@ -18,7 +18,7 @@ namespace GtkDemo
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VBox vbox = new VBox (false, 5);
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vbox.BorderWidth = 5;
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this.VBox.PackStart (vbox, true, true, 0);
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this.ContentArea.PackStart (vbox, true, true, 0);
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Label label = new Label ("Completion demo, try writing <b>total</b> or <b>gnome</b> for example.");
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label.UseMarkup = true;
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@ -17,7 +17,7 @@ namespace GtkDemo
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Resizable = false;
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VBox vbox = new VBox (false, 5);
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this.VBox.PackStart (vbox, true, true, 0);
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this.ContentArea.PackStart (vbox, true, true, 0);
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vbox.BorderWidth = 5;
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vbox.PackStart (new Label ("Expander demo. Click on the triangle for details."), false, false, 0);
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@ -184,7 +184,7 @@ namespace GtkDemo
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view.WindowToBufferCoords (TextWindowType.Widget, (int) args.Event.X, (int) args.Event.Y, out x, out y);
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SetCursorIfAppropriate (view, x, y);
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view.GdkWindow.GetPointer (out x, out y, out state);
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view.Window.GetPointer (out x, out y, out state);
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}
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// Also update the cursor image if the window becomes visible
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@ -170,7 +170,7 @@ namespace GtkDemo
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{
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Gdk.Pixbuf pixbuf = pixbufLoader.Pixbuf;
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pixbuf.Fill (0xaaaaaaff);
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progressiveImage.FromPixbuf = pixbuf;
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progressiveImage.Pixbuf = pixbuf;
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}
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void ProgressiveUpdatedCallback (object obj, AreaUpdatedArgs args)
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@ -180,8 +180,8 @@ namespace GtkDemo
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scrolledWindow.Add (textView);
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if (IsSource) {
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FontDescription fontDescription = FontDescription.FromString ("Courier 12");
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textView.ModifyFont (fontDescription);
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FontDescription fontDescription = FontDescription.FromString ("monospace");
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textView.OverrideFont (fontDescription);
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textView.WrapMode = Gtk.WrapMode.None;
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} else {
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// Make it a bit nicer for text
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@ -71,23 +71,13 @@ namespace GtkDemo
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}
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// Expose callback for the drawing area
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void Expose (object o, ExposeEventArgs args)
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void DrawnCallback (object o, DrawnArgs args)
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{
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Widget widget = (Widget) o;
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Gdk.Rectangle area = args.Event.Area;
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byte[] pixels;
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int rowstride;
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Cairo.Context cr = args.Cr;
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rowstride = frame.Rowstride;
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pixels = new byte[(frame.Height - area.Y) * rowstride];
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IntPtr src = (IntPtr)(frame.Pixels.ToInt64 () + rowstride * area.Y + area.X * 3);
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Marshal.Copy (src, pixels, 0, pixels.Length);
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Gdk.CairoHelper.SetSourcePixbuf (cr, frame, 0, 0);
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cr.Paint ();
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widget.GdkWindow.DrawRgbImageDithalign (widget.Style.BlackGC,
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area.X, area.Y, area.Width, area.Height,
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Gdk.RgbDither.Normal,
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pixels, rowstride,
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area.X, area.Y);
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args.RetVal = true;
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}
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@ -152,7 +142,7 @@ namespace GtkDemo
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frame = new Pixbuf (Colorspace.Rgb, false, 8, backWidth, backHeight);
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drawingArea = new DrawingArea ();
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drawingArea.ExposeEvent += new ExposeEventHandler (Expose);
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drawingArea.Drawn += new DrawnHandler (DrawnCallback);
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Add (drawingArea);
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timeoutId = GLib.Timeout.Add (FrameDelay, new GLib.TimeoutHandler(timeout));
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@ -33,7 +33,7 @@ namespace GtkDemo
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Resizable = false;
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VBox vbox = new VBox (false, 5);
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this.VBox.PackStart (vbox, true, true, 0);
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this.ContentArea.PackStart (vbox, true, true, 0);
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vbox.BorderWidth = 5;
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sizeGroup = new SizeGroup (SizeGroupMode.Horizontal);
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@ -76,7 +76,7 @@ namespace GtkDemo
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// Convenience function to create a combo box holding a number of strings
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private ComboBox CreateComboBox (string [] strings)
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{
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ComboBox combo = ComboBox.NewText ();
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ComboBoxText combo = new ComboBoxText ();
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foreach (string str in strings)
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combo.AppendText (str);
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@ -71,7 +71,7 @@ namespace GtkDemo
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textView.AddChildAtAnchor (button, buttonAnchor);
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button.ShowAll ();
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ComboBox combo = ComboBox.NewText ();
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ComboBoxText combo = new ComboBoxText ();
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combo.AppendText ("Option 1");
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combo.AppendText ("Option 2");
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combo.AppendText ("Option 3");
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@ -154,20 +154,6 @@ namespace GtkDemo
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tag.Background = "red";
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buffer.TagTable.Add (tag);
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// The C gtk-demo passes NULL for the drawable param, which isn't
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// multi-head safe, so it seems bad to allow it in the C# API.
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// But the Window isn't realized at this point, so we can't get
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// an actual Drawable from it. So we kludge for now.
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Pixmap stipple = Pixmap.CreateBitmapFromData (Gdk.Screen.Default.RootWindow, gray50_bits, gray50_width, gray50_height);
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tag = new TextTag ("background_stipple");
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tag.BackgroundStipple = stipple;
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buffer.TagTable.Add (tag);
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tag = new TextTag ("foreground_stipple");
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tag.ForegroundStipple = stipple;
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buffer.TagTable.Add (tag);
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tag = new TextTag ("big_gap_before_line");
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tag.PixelsAboveLines = 30;
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buffer.TagTable.Add (tag);
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@ -278,16 +264,9 @@ namespace GtkDemo
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buffer.Insert (ref insertIter, " or ");
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buffer.InsertWithTagsByName (ref insertIter, "a red background", "red_background");
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buffer.Insert (ref insertIter, " or even ");
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buffer.InsertWithTagsByName (ref insertIter, "a stippled red background",
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"red_background",
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"background_stipple");
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buffer.Insert (ref insertIter, " or ");
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buffer.InsertWithTagsByName (ref insertIter,
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"a stippled blue foreground on solid red background",
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buffer.InsertWithTagsByName (ref insertIter, "a blue foreground on red background",
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"blue_foreground",
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"red_background",
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"foreground_stipple");
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"red_background");
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buffer.Insert (ref insertIter, " (select that to read it) can be used.\n\n");
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buffer.InsertWithTagsByName (ref insertIter, "Underline, strikethrough, and rise. ", "heading");
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@ -389,9 +368,9 @@ namespace GtkDemo
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// Event box is to add a black border around each child view
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EventBox eventBox = new EventBox ();
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Gdk.Color color = new Gdk.Color ();
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Gdk.Color.Parse ("black", ref color);
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eventBox.ModifyBg (StateType.Normal, color);
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Gdk.RGBA color = new Gdk.RGBA ();
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color.Parse ("black");
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eventBox.OverrideBackgroundColor (StateFlags.Normal, color);
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Alignment align = new Alignment (0.5f, 0.5f, 1.0f, 1.0f);
|
||||
align.BorderWidth = 1;
|
||||
|
|
|
|||
|
|
@ -1,4 +1,4 @@
|
|||
# SUBDIRS = GtkDemo pixmaps valtest opaquetest gio gtk-gio
|
||||
SUBDIRS = GtkDemo #pixmaps valtest opaquetest gio gtk-gio
|
||||
|
||||
if ENABLE_DOTNET
|
||||
DOTNET_TARGETS=drawing-sample.exe
|
||||
|
|
|
|||
Loading…
Reference in a new issue