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GtkThemingEngine: Add vmethod to render lines.

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This commit is contained in:
Carlos Garnacho 2010-03-27 21:17:22 +01:00
parent f80fbbd829
commit b8f6617d99
2 changed files with 127 additions and 0 deletions
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121
gtk/gtkthemingengine.c
View File

@ -90,6 +90,12 @@ static void gtk_theming_engine_render_layout (GtkThemingEngine *engine,
gdouble x,
gdouble y,
PangoLayout *layout);
static void gtk_theming_engine_render_line (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x0,
gdouble y0,
gdouble x1,
gdouble y1);
G_DEFINE_TYPE (GtkThemingEngine, gtk_theming_engine, G_TYPE_OBJECT)
@ -129,6 +135,7 @@ gtk_theming_engine_class_init (GtkThemingEngineClass *klass)
klass->render_expander = gtk_theming_engine_render_expander;
klass->render_focus = gtk_theming_engine_render_focus;
klass->render_layout = gtk_theming_engine_render_layout;
klass->render_line = gtk_theming_engine_render_line;
g_type_class_add_private (object_class, sizeof (GtkThemingEnginePrivate));
}
@ -919,6 +926,120 @@ gtk_theming_engine_render_focus (GtkThemingEngine *engine,
gdk_color_free (base_color);
}
static void
add_path_line (cairo_t *cr,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2)
{
cairo_move_to (cr, x1 + 0.5, y1 + 0.5);
cairo_line_to (cr, x2 + 0.5, y2 + 0.5);
}
static void
gtk_theming_engine_render_line (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x0,
gdouble y0,
gdouble x1,
gdouble y1)
{
GdkColor *bg_color, darker, lighter;
GtkStateFlags flags;
GtkStateType state;
gint thickness, thickness_dark, thickness_light;
gint i;
thickness = 2;
thickness_dark = thickness / 2;
thickness_light = thickness - thickness_dark;
flags = gtk_theming_engine_get_state (engine);
cairo_save (cr);
if (flags & GTK_STATE_FLAG_PRELIGHT)
state = GTK_STATE_PRELIGHT;
else if (flags & GTK_STATE_FLAG_INSENSITIVE)
state = GTK_STATE_INSENSITIVE;
else
state = GTK_STATE_NORMAL;
gtk_theming_engine_get (engine, state,
"background-color", &bg_color,
NULL);
color_shade (bg_color, 0.7, &darker);
color_shade (bg_color, 1.3, &lighter);
cairo_set_line_cap (cr, CAIRO_LINE_CAP_SQUARE);
cairo_set_line_width (cr, 1);
if (y0 == y1)
{
/* Horizontal line */
for (i = 0; i < thickness_dark; i++)
{
gdk_cairo_set_source_color (cr, &darker);
add_path_line (cr, x0, y0, x1 - i - 1, y0);
cairo_stroke (cr);
gdk_cairo_set_source_color (cr, &lighter);
add_path_line (cr, x1 - i, y0, x1, y0 + 1);
cairo_stroke (cr);
y0++;
}
for (i = 0; i < thickness_light; i++)
{
gdk_cairo_set_source_color (cr, &darker);
add_path_line (cr, x0, y0, x0 + thickness_light - i, y0);
cairo_stroke (cr);
gdk_cairo_set_source_color (cr, &lighter);
add_path_line (cr, x0 + thickness_light - i, y0, x1, y0);
cairo_stroke (cr);
y0++;
}
}
else if (x0 == x1)
{
/* Vertical line */
for (i = 0; i < thickness_dark; i++)
{
gdk_cairo_set_source_color (cr, &darker);
add_path_line (cr, x0, y0, x0, y1 - i - 1);
cairo_stroke (cr);
gdk_cairo_set_source_color (cr, &lighter);
add_path_line (cr, x0, y1 - i, x0, y1);
cairo_stroke (cr);
x0++;
}
for (i = 0; i < thickness_light; i++)
{
gdk_cairo_set_source_color (cr, &darker);
add_path_line (cr, x0, y0, x0, y0 + thickness_light - i - 1);
cairo_stroke (cr);
gdk_cairo_set_source_color (cr, &lighter);
add_path_line (cr, x0, y0 + thickness_light - i, x0, y1);
cairo_stroke (cr);
x0++;
}
}
else
{
/* Arbitrary line */
/* FIXME: implement thickness, etc */
gdk_cairo_set_source_color (cr, &darker);
add_path_line (cr, x0, y0, x1, y1);
cairo_stroke (cr);
}
cairo_restore (cr);
}
static void
gtk_theming_engine_render_layout (GtkThemingEngine *engine,
cairo_t *cr,

6
gtk/gtkthemingengine.h
View File

@ -49,6 +49,12 @@ struct GtkThemingEngineClass
{
GObjectClass parent_class;
void (* render_line) (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x0,
gdouble y0,
gdouble x1,
gdouble y1);
void (* render_background) (GtkThemingEngine *engine,
cairo_t *cr,
gdouble x,