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Add examples to Foreground/Background, because they are far from obvious

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svn path=/trunk/gtk-sharp/; revision=12070
This commit is contained in:
Miguel de Icaza 2003-02-28 20:29:20 +00:00
parent b68831eb6c
commit b00846dea2
1 changed files with 70 additions and 6 deletions
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76
doc/en/Gdk/GC.xml
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@ -435,9 +435,11 @@
<param name="value"> a Gdk.Colormap</param>
<returns> a Gdk.Colormap</returns>
<remarks>
<para>Sets the colormap for the GC to the given
colormap. The depth of the colormap's visual must match the
depth of the drawable for which the GC was created.</para>
<para>
Fetches or changes the colormap of the GC. The depth of
the colormap's visual must match the depth of the drawable
for which the GC was created.
</para>
</remarks>
</Docs>
</Member>
@ -480,7 +482,34 @@
<param name="value">the new foreground color.</param>
<returns>the new foreground color.</returns>
<remarks>
<para>Sets the foreground color for a graphics context.</para>
<para>
Sets the foreground color for a graphics context to the
given color. The color must have been allocated for this
to work.
</para>
<example>
<code lang="C#">
Gdk.GC my_gc = new Gdk.GC (gdk_window);
//
// Create the color
//
Gdk.Color red_color = new Gdk.Color (0xff, 0, 0);
//
// Allocate it
//
Gdk.Colormap colormap = Gdk.Colormap.System;
colormap.AllocColor (ref red_color, true, true);
my_gc.Foreground = red_color;
//
// Draw diagonal, using the GC with the red color
//
gdk_window.DrawLine (my_gc, 0, 0, 100, 100);
</code>
</example>
</remarks>
</Docs>
</Member>
@ -579,8 +608,43 @@
<param name="value">the new background color.</param>
<returns>the new background color.</returns>
<remarks>
<para>Sets the background color for a graphics
context.</para>
<para>
Sets the background color for a graphics
context. The color must have been allocated.
</para>
<example>
<code lang="C#">
Gdk.GC my_gc = new Gdk.GC (gdk_window);
//
// Create the color
//
Gdk.Color back_color = new Gdk.Color (0xff, 0, 0);
Gdk.Color fore_color = new Gdk.Color (0, 0, 0xff);
//
// Allocate them
//
Gdk.Colormap colormap = Gdk.Colormap.System;
colormap.AllocColor (ref back_color, true, true);
Gdk.Colormap colormap = Gdk.Colormap.System;
colormap.AllocColor (ref fore_color, true, true);
my_gc.Background = back_color;
my_gc.Background = fore_color;
//
// Draw a thick line, alternating between foreground and
// background colors
//
my_gc.SetLineAttributes (3, LineStyle.DoubleDash, CapStyle.NotLast, JoinStyle.Round);
//
// Draw diagonal, using the GC with the red color
//
gdk_window.DrawLine (my_gc, 0, 0, 100, 100);
</code>
</example>
</remarks>
</Docs>
</Member>