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added Gtkmm2ext::rounded_rectangle() cairo pseudo-method

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git-svn-id: svn://localhost/ardour2/branches/3.0@8787 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
Paul Davis 2011-02-08 23:42:45 +00:00
parent 6be6041b71
commit 4ed504acd7
2 changed files with 89 additions and 0 deletions
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7
libs/gtkmm2ext/gtkmm2ext/utils.h
View File

@ -24,12 +24,18 @@
#include <string>
#include <stdint.h>
#include <cairomm/refptr.h>
#include <gtkmm/container.h>
#include <gtkmm/treeview.h>
#include <gdkmm/window.h> /* for WMDecoration */
#include <gdkmm/pixbuf.h>
#include <pangomm/fontdescription.h>
namespace Cairo {
class Context;
}
namespace Gtk {
class ComboBoxText;
class Widget;
@ -89,6 +95,7 @@ namespace Gtkmm2ext {
int physical_screen_width (Glib::RefPtr<Gdk::Window>);
void container_clear (Gtk::Container&);
void rounded_rectangle (Cairo::RefPtr<Cairo::Context> context, double x, double y, double w, double h, double r=10);
};
#endif /* __gtkmm2ext_utils_h__ */

82
libs/gtkmm2ext/utils.cc
View File

@ -386,3 +386,85 @@ Gtkmm2ext::container_clear (Gtk::Container& c)
c.remove (**child);
}
}
#if 1
void
Gtkmm2ext::rounded_rectangle (Cairo::RefPtr<Cairo::Context> context, double x, double y, double w, double h, double r)
{
/* renders small shapes better than most others */
/* A****BQ
H C
* *
G D
F****E
*/
context->move_to(x+r,y); // Move to A
context->line_to(x+w-r,y); // Straight line to B
context->curve_to(x+w,y,x+w,y,x+w,y+r); // Curve to C, Control points are both at Q
context->line_to(x+w,y+h-r); // Move to D
context->curve_to(x+w,y+h,x+w,y+h,x+w-r,y+h); // Curve to E
context->line_to(x+r,y+h); // Line to F
context->curve_to(x,y+h,x,y+h,x,y+h-r); // Curve to G
context->line_to(x,y+r); // Line to H
context->curve_to(x,y,x,y,x+r,y); // Curve to A
}
#else
void
Gtkmm2ext::rounded_rectangle (Cairo::RefPtr<Cairo::Context> context, double x, double y, double width, double height, double radius)
{
/* doesn't render small shapes well at all, and does not absolutely honor width & height */
double x0 = x+radius/2.0;
double y0 = y+radius/2.0;
double rect_width = width - radius;
double rect_height = height - radius;
context->save();
double x1=x0+rect_width;
double y1=y0+rect_height;
if (rect_width/2<radius) {
if (rect_height/2<radius) {
context->move_to (x0, (y0 + y1)/2);
context->curve_to (x0 ,y0, x0, y0, (x0 + x1)/2, y0);
context->curve_to (x1, y0, x1, y0, x1, (y0 + y1)/2);
context->curve_to (x1, y1, x1, y1, (x1 + x0)/2, y1);
context->curve_to (x0, y1, x0, y1, x0, (y0 + y1)/2);
} else {
context->move_to (x0, y0 + radius);
context->curve_to (x0 ,y0, x0, y0, (x0 + x1)/2, y0);
context->curve_to (x1, y0, x1, y0, x1, y0 + radius);
context->line_to (x1 , y1 - radius);
context->curve_to (x1, y1, x1, y1, (x1 + x0)/2, y1);
context->curve_to (x0, y1, x0, y1, x0, y1- radius);
}
} else {
if (rect_height/2<radius) {
context->move_to (x0, (y0 + y1)/2);
context->curve_to (x0 , y0, x0 , y0, x0 + radius, y0);
context->line_to (x1 - radius, y0);
context->curve_to (x1, y0, x1, y0, x1, (y0 + y1)/2);
context->curve_to (x1, y1, x1, y1, x1 - radius, y1);
context->line_to (x0 + radius, y1);
context->curve_to (x0, y1, x0, y1, x0, (y0 + y1)/2);
} else {
context->move_to (x0, y0 + radius);
context->curve_to (x0 , y0, x0 , y0, x0 + radius, y0);
context->line_to (x1 - radius, y0);
context->curve_to (x1, y0, x1, y0, x1, y0 + radius);
context->line_to (x1 , y1 - radius);
context->curve_to (x1, y1, x1, y1, x1 - radius, y1);
context->line_to (x0 + radius, y1);
context->curve_to (x0, y1, x0, y1, x0, y1- radius);
}
}
context->close_path ();
context->restore();
}
#endif