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<H1>[Gtk-sharp-list] Help with widget not displaying in dialog</H1>
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<B>alan battersby</B>
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<A HREF="mailto:gtk-sharp-list%40lists.ximian.com?Subject=%5BGtk-sharp-list%5D%20Help%20with%20widget%20not%20displaying%20in%20dialog&In-Reply-To="
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TITLE="[Gtk-sharp-list] Help with widget not displaying in dialog">alan.battersby at ntlworld.com
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</A><BR>
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<I>Sun Apr 19 15:55:54 EDT 2009</I>
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<P><UL>
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<LI>Previous message: <A HREF="009574.html">[Gtk-sharp-list] Heterogeneous Nodes In Gtk.NodeView / Gtk.NodeStore
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<!--beginarticle-->
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<PRE>Hi,
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I have a problem, I have a dialog containing a widget I wrote to display
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axis information. In turn this widget contains another widget to draw
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the axes concerned in a drawingarea. When I run the dialog, the drawing
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initially appears but then is cleared. When I click on a button to
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rotate the axes then drawing appears again and stays visible. So could
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someone suggest what I am doing wrong or how I can stop the drawingarea
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from being cleared initially. Is it being cleared when I run the Dialog?
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Thanks any help would be appreciated as Ive spent all afternoon trying
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to solve this,
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Alan
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Code fragments are
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public partial class AxismapDialog : Gtk.Dialog
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{
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public AxisMap AxisMap {
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get {
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return axismapdisplay.AxisMap;
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}
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set {
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axismapdisplay.AxisMap = value;
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}
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}
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public partial class AxismapDisplay : Gtk.Bin
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{
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AxisMap _map;
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public AxisMap AxisMap {
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get {
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return _map;
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}
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set {
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_map = value;
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// code to set UI textfields etc
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...
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// SHOULD DRAW HERE
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framedisplay1.Frame = _map.Frame;
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framedisplay1.DrawAxes(); // put this in out of
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desperation shouldn't need it
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}
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// in widget I have a buttons to rotate the axes
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protected virtual void OnXrotBTNClicked (object sender,
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System.EventArgs e)
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{
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_map.Frame.Rotate90(AXIS.X);
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framedisplay1.DrawAxes(); // this works ok
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}
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}
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public partial class FrameDisplay : Gtk.Bin
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{
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Frame _frame;
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public Frame Frame {
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get {
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return _frame;
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}
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set {
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_frame = value;
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DrawAxes();
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}
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public void DrawAxes()
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{
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if (_frame == null) return;
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drawingarea.GdkWindow.Clear();
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using (Context ct =
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Gdk.CairoHelper.Create(drawingarea.GdkWindow))
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{
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// now scale window and centre to origin
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int height = 0,width = 0;
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drawingarea.GdkWindow.GetSize(out width, out height);
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l = (float)Math.Min(width/2,height/2);
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ct.Translate(width/2,height/2);
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// should be centred now
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// first x axis
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ct.Color = new Cairo.Color(1,0,0);
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drawline(_frame.X,ct,l,AXIS.X.ToString());
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// now y axis
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ct.Color = new Cairo.Color(0,1,0);
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drawline(_frame.Y,ct,l,AXIS.Y.ToString());
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// now z axis
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ct.Color = new Cairo.Color(0,0,1);
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drawline(_frame.Z,ct,l,AXIS.Z.ToString());
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}
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}
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}
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//in main user window have a button to create and display the dialog.
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protected virtual void OnAxismapbtnClicked (object sender,
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System.EventArgs e)
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{
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AxismapDialog amd = new AxismapDialog();
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amd.AxisMap = _codegen.AxisMap;
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if (amd.Run() == (int)ResponseType.Ok)
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{
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_codegen.AxisMap = amd.AxisMap;
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}
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amd.Destroy();
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axismaplabel.Text = _codegen.AxisMap.ShortString;
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}
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Dont know if this enough information to help.
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</PRE>
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<!--endarticle-->
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<!--threads-->
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<LI>Previous message: <A HREF="009574.html">[Gtk-sharp-list] Heterogeneous Nodes In Gtk.NodeView / Gtk.NodeStore
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</A></li>
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<LI>Next message: <A HREF="009568.html">[Gtk-sharp-list] Help with widget not displaying in dialog
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</A></li>
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<a href="date.html#9567">[ date ]</a>
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<a href="thread.html#9567">[ thread ]</a>
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<a href="subject.html#9567">[ subject ]</a>
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