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app: add an infrastructure that allows to stroke multiple items at once

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In order to avoid visually overlapping lines:

- GimpCanvasItem got a "suspend_stroking" API that allows to skip
  stroking and instead starts a new sub-path
- GimpCanvasGroup got a "group_stroking" API that sets suspend_stroking
  on all its children and does one stroke after calling all items'
  draw().
This commit is contained in:
Michael Natterer
2010-09-26 14:12:54 +02:00
parent ea5190e630
commit e6ce564de4
4 changed files with 125 additions and 28 deletions
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31
app/display/gimpcanvasitem.h
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@ -52,26 +52,29 @@ struct _GimpCanvasItemClass
};
GType gimp_canvas_item_get_type (void) G_GNUC_CONST;
GType gimp_canvas_item_get_type (void) G_GNUC_CONST;
void gimp_canvas_item_draw (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr);
GdkRegion * gimp_canvas_item_get_extents (GimpCanvasItem *item,
GimpDisplayShell *shell);
void gimp_canvas_item_draw (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr);
GdkRegion * gimp_canvas_item_get_extents (GimpCanvasItem *item,
GimpDisplayShell *shell);
void gimp_canvas_item_set_highlight(GimpCanvasItem *item,
gboolean highlight);
void gimp_canvas_item_set_highlight (GimpCanvasItem *item,
gboolean highlight);
void gimp_canvas_item_suspend_stroking (GimpCanvasItem *item);
void gimp_canvas_item_resume_stroking (GimpCanvasItem *item);
/* protected */
void _gimp_canvas_item_stroke (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr);
void _gimp_canvas_item_fill (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr);
void _gimp_canvas_item_stroke (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr);
void _gimp_canvas_item_fill (GimpCanvasItem *item,
GimpDisplayShell *shell,
cairo_t *cr);
#endif /* __GIMP_CANVAS_ITEM_H__ */