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allow users of the preview widget to get a mask for windows in the correct

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2008-02-25  Thomas Wood  <thos@gnome.org>

        * src/ui/preview-widget.[ch] (meta_preview_get_clip_region):
	allow users of the preview widget to get a mask for windows
	in the correct shape for the current theme.


svn path=/trunk/; revision=3596
This commit is contained in:
Thomas Wood 2008-02-25 15:39:49 +00:00 committed by Thomas James Alexander Thurman
parent b3f766c618
commit abdb3fd8b9
3 changed files with 118 additions and 0 deletions
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6
ChangeLog
View File

@ -1,3 +1,9 @@
2008-02-25 Thomas Wood <thos@gnome.org>
* src/ui/preview-widget.[ch] (meta_preview_get_clip_region):
allow users of the preview widget to get a mask for windows
in the correct shape for the current theme.
2008-02-23 Thomas Thurman <tthurman@gnome.org>
Refactor handling of boolean preferences.

109
src/ui/preview-widget.c
View File

@ -460,3 +460,112 @@ meta_preview_get_mini_icon (void)
return default_icon;
}
GdkRegion *
meta_preview_get_clip_region (MetaPreview *preview, gint new_window_width, gint new_window_height)
{
GdkRectangle xrect;
GdkRegion *corners_xregion, *window_xregion;
gint flags;
MetaFrameLayout *fgeom;
MetaFrameStyle *frame_style;
g_return_if_fail (META_IS_PREVIEW (preview));
flags = (META_PREVIEW (preview)->flags);
frame_style = meta_theme_get_frame_style (preview->theme,
META_FRAME_TYPE_NORMAL, flags);
fgeom = frame_style->layout;
corners_xregion = gdk_region_new ();
if (fgeom->top_left_corner_rounded_radius != 0)
{
const int corner = fgeom->top_left_corner_rounded_radius;
const float radius = sqrt(corner) + corner;
int i;
for (i=0; i<corner; i++)
{
const int width = floor(0.5 + radius - sqrt(radius*radius - (radius-(i+0.5))*(radius-(i+0.5))));
xrect.x = 0;
xrect.y = i;
xrect.width = width;
xrect.height = 1;
gdk_region_union_with_rect (corners_xregion, &xrect);
}
}
if (fgeom->top_right_corner_rounded_radius != 0)
{
const int corner = fgeom->top_right_corner_rounded_radius;
const float radius = sqrt(corner) + corner;
int i;
for (i=0; i<corner; i++)
{
const int width = floor(0.5 + radius - sqrt(radius*radius - (radius-(i+0.5))*(radius-(i+0.5))));
xrect.x = new_window_width - width;
xrect.y = i;
xrect.width = width;
xrect.height = 1;
gdk_region_union_with_rect (corners_xregion, &xrect);
}
}
if (fgeom->bottom_left_corner_rounded_radius != 0)
{
const int corner = fgeom->bottom_left_corner_rounded_radius;
const float radius = sqrt(corner) + corner;
int i;
for (i=0; i<corner; i++)
{
const int width = floor(0.5 + radius - sqrt(radius*radius - (radius-(i+0.5))*(radius-(i+0.5))));
xrect.x = 0;
xrect.y = new_window_height - i - 1;
xrect.width = width;
xrect.height = 1;
gdk_region_union_with_rect (corners_xregion, &xrect);
}
}
if (fgeom->bottom_right_corner_rounded_radius != 0)
{
const int corner = fgeom->bottom_right_corner_rounded_radius;
const float radius = sqrt(corner) + corner;
int i;
for (i=0; i<corner; i++)
{
const int width = floor(0.5 + radius - sqrt(radius*radius - (radius-(i+0.5))*(radius-(i+0.5))));
xrect.x = new_window_width - width;
xrect.y = new_window_height - i - 1;
xrect.width = width;
xrect.height = 1;
gdk_region_union_with_rect (corners_xregion, &xrect);
}
}
window_xregion = gdk_region_new ();
xrect.x = 0;
xrect.y = 0;
xrect.width = new_window_width;
xrect.height = new_window_height;
gdk_region_union_with_rect (window_xregion, &xrect);
gdk_region_subtract (window_xregion, corners_xregion);
gdk_region_destroy (corners_xregion);
return window_xregion;
}

3
src/ui/preview-widget.h
View File

@ -77,6 +77,9 @@ void meta_preview_set_frame_flags (MetaPreview *preview,
void meta_preview_set_button_layout (MetaPreview *preview,
const MetaButtonLayout *button_layout);
GdkRegion * meta_preview_get_clip_region (MetaPreview *preview,
gint new_window_width,
gint new_window_height);
GdkPixbuf* meta_preview_get_icon (void);
GdkPixbuf* meta_preview_get_mini_icon (void);