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Add clipping apis to GtkRoundedBox

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This adds two functions for checking whether an axis-aligned
rectangle is completely outside or inside of a rounded box.
These are not trying to be exact, but fast.
This commit is contained in:
Matthias Clasen 2014-12-02 08:26:36 -05:00
parent 579c7f80a0
commit 73e6a05e38
2 changed files with 57 additions and 0 deletions
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47
gtk/gtkroundedbox.c
View File

@ -536,3 +536,50 @@ _gtk_rounded_box_clip_path (const GtkRoundedBox *box,
box->box.width, box->box.height);
}
gboolean
_gtk_rounded_box_intersects_rectangle (const GtkRoundedBox *box,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2)
{
if (x2 < box->box.x ||
y2 < box->box.y ||
x1 >= box->box.x + box->box.width ||
y1 >= box->box.y + box->box.height)
return FALSE;
return TRUE;
}
gboolean
_gtk_rounded_box_contains_rectangle (const GtkRoundedBox *box,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2)
{
if (x1 < box->box.x ||
y1 < box->box.y ||
x2 >= box->box.x + box->box.width ||
y2 >= box->box.y + box->box.width)
return FALSE;
if (x1 < box->box.x + box->corner[GTK_CSS_TOP_LEFT].horizontal &&
y1 < box->box.y + box->corner[GTK_CSS_TOP_LEFT].vertical)
return FALSE;
if (x2 > box->box.x + box->box.width - box->corner[GTK_CSS_TOP_RIGHT].horizontal &&
y1 < box->box.y + box->corner[GTK_CSS_TOP_RIGHT].vertical)
return FALSE;
if (x2 > box->box.x + box->box.width - box->corner[GTK_CSS_BOTTOM_RIGHT].horizontal &&
y2 > box->box.y + box->box.height - box->corner[GTK_CSS_BOTTOM_RIGHT].vertical)
return FALSE;
if (x1 < box->box.x + box->corner[GTK_CSS_BOTTOM_LEFT].horizontal &&
y2 > box->box.y + box->box.height - box->corner[GTK_CSS_BOTTOM_LEFT].vertical)
return FALSE;
return TRUE;
}

10
gtk/gtkroundedboxprivate.h
View File

@ -91,6 +91,16 @@ void _gtk_rounded_box_path_left (const GtkRounde
cairo_t *cr);
void _gtk_rounded_box_clip_path (const GtkRoundedBox *box,
cairo_t *cr);
gboolean _gtk_rounded_box_intersects_rectangle (const GtkRoundedBox *box,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2);
gboolean _gtk_rounded_box_contains_rectangle (const GtkRoundedBox *box,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2);
G_END_DECLS