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GtkThemingEngine: render 0-radius frames with 3D-like 45° corner effect

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This commit is contained in:
Carlos Garnacho 2010-10-25 10:24:15 +02:00
parent 43f7fb8354
commit 6356f01b06
1 changed files with 49 additions and 10 deletions
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59
gtk/gtkthemingengine.c
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@ -1534,6 +1534,7 @@ gtk_theming_engine_render_frame (GtkThemingEngine *engine,
GtkBorderStyle border_style;
gint border_width, radius;
GtkJunctionSides junction;
gdouble d1, d2, m;
flags = gtk_theming_engine_get_state (engine);
junction = gtk_theming_engine_get_junction_sides (engine);
@ -1584,17 +1585,33 @@ gtk_theming_engine_render_frame (GtkThemingEngine *engine,
cairo_set_line_width (cr, border_width);
cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
d1 = d2 = 0;
if (border_width > 1)
{
gdouble d;
d1 = (gdouble) border_width / 2;
d2 = (gdouble) (border_width - (gint) d1) + 1;
}
d = (gdouble) border_width / 2;
x += d;
y += d;
cairo_save (cr);
d = (gdouble) (border_width - (gint) d) + 1;
width -= d;
height -= d;
m = MIN (width, height);
m /= 2;
/* Only needed for square frames to have a 3D-like
* feeling, for rounded ones, the arc will ensure
* the stroke is painted to end at 45°.
*/
if (radius == 0)
{
cairo_move_to (cr, x, y + height);
cairo_line_to (cr, x + m, y + height - m);
cairo_line_to (cr, x + width - m, y + m);
cairo_line_to (cr, x + width, y);
cairo_line_to (cr, x + width, y + height);
cairo_close_path (cr);
cairo_clip (cr);
}
if (border_style == GTK_BORDER_STYLE_INSET)
@ -1602,19 +1619,41 @@ gtk_theming_engine_render_frame (GtkThemingEngine *engine,
else
gdk_cairo_set_source_rgba (cr, border_color);
_cairo_round_rectangle_sides (cr, (gdouble) radius, x, y, width, height,
_cairo_round_rectangle_sides (cr, (gdouble) radius,
x + d1, y + d1,
width - d2, height - d2,
SIDE_BOTTOM | SIDE_RIGHT, junction);
cairo_stroke (cr);
if (border_style == GTK_BORDER_STYLE_INSET)
cairo_restore (cr);
cairo_save (cr);
if (radius == 0)
{
cairo_move_to (cr, x, y + height);
cairo_line_to (cr, x + m, y + height - m);
cairo_line_to (cr, x + width - m, y + m);
cairo_line_to (cr, x + width, y);
cairo_line_to (cr, x, y);
cairo_close_path (cr);
cairo_clip (cr);
}
if (border_style == GTK_BORDER_STYLE_INSET)
gdk_cairo_set_source_rgba (cr, border_color);
else
gdk_cairo_set_source_rgba (cr, &lighter);
_cairo_round_rectangle_sides (cr, (gdouble) radius, x, y, width, height,
_cairo_round_rectangle_sides (cr, (gdouble) radius,
x + d1, y + d1,
width - d2, height - d2,
SIDE_TOP | SIDE_LEFT, junction);
cairo_stroke (cr);
cairo_restore (cr);
break;
}