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use a private inner class directly derived from GtkWidget for drawing the 

2008-02-26  Sven Neumann  <sven@gimp.org>

	* libgimpwidgets/gimpchainbutton.c: use a private inner class
	directly derived from GtkWidget for drawing the lines. This 
saves
	us two input windows.


svn path=/trunk/; revision=24983
This commit is contained in:
Sven Neumann 2008-02-26 19:25:11 +00:00 committed by Sven Neumann
parent fff02fb02e
commit b0813ee283
2 changed files with 89 additions and 56 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2008-02-26 Sven Neumann <sven@gimp.org>
* libgimpwidgets/gimpchainbutton.c: use a private inner class
directly derived from GtkWidget for drawing the lines. This saves
us two input windows.
2008-02-26 Sven Neumann <sven@gimp.org>
* plug-ins/print/print-preview.c: take the reading direction into

139
libgimpwidgets/gimpchainbutton.c
View File

@ -56,11 +56,11 @@ static void gimp_chain_button_get_property (GObject *object,
static void gimp_chain_button_clicked_callback (GtkWidget *widget,
GimpChainButton *button);
static gboolean gimp_chain_button_draw_lines (GtkWidget *widget,
GdkEventExpose *eevent,
GimpChainButton *button);
static void gimp_chain_button_update_image (GimpChainButton *button);
static GtkWidget * gimp_chain_line_new (GimpChainPosition position,
gint which);
G_DEFINE_TYPE (GimpChainButton, gimp_chain_button, GTK_TYPE_TABLE)
@ -117,30 +117,16 @@ gimp_chain_button_init (GimpChainButton *button)
{
button->position = GIMP_CHAIN_TOP;
button->active = FALSE;
button->line1 = g_object_new (GTK_TYPE_EVENT_BOX,
"visible-window", FALSE,
NULL);
button->line2 = g_object_new (GTK_TYPE_EVENT_BOX,
"visible-window", FALSE,
NULL);
button->image = gtk_image_new ();
button->button = gtk_button_new ();
gtk_button_set_relief (GTK_BUTTON (button->button), GTK_RELIEF_NONE);
gtk_container_add (GTK_CONTAINER (button->button), button->image);
gtk_widget_show (button->image);
g_signal_connect (button->button, "clicked",
G_CALLBACK (gimp_chain_button_clicked_callback),
button);
g_signal_connect (button->line1, "expose-event",
G_CALLBACK (gimp_chain_button_draw_lines),
button);
g_signal_connect (button->line2, "expose-event",
G_CALLBACK (gimp_chain_button_draw_lines),
button);
}
static GObject *
@ -155,8 +141,10 @@ gimp_chain_button_constructor (GType type,
button = GIMP_CHAIN_BUTTON (object);
button->line1 = gimp_chain_line_new (button->position, 1);
button->line2 = gimp_chain_line_new (button->position, -1);
gimp_chain_button_update_image (button);
gtk_widget_show (button->image);
if (button->position & GIMP_CHAIN_LEFT) /* are we a vertical chainbutton? */
{
@ -301,29 +289,83 @@ gimp_chain_button_clicked_callback (GtkWidget *widget,
g_signal_emit (button, gimp_chain_button_signals[TOGGLED], 0);
}
static gboolean
gimp_chain_button_draw_lines (GtkWidget *widget,
GdkEventExpose *eevent,
GimpChainButton *button)
static void
gimp_chain_button_update_image (GimpChainButton *button)
{
guint i;
i = ((button->position & GIMP_CHAIN_LEFT) << 1) + (button->active ? 0 : 1);
gtk_image_set_from_stock (GTK_IMAGE (button->image),
gimp_chain_stock_items[i],
GTK_ICON_SIZE_BUTTON);
}
/* GimpChainLine is a simple no-window widget for drawing the lines.
*
* Originally this used to be a GtkDrawingArea but this turned out to
* be a bad idea. We don't need an extra window to draw on and we also
* don't need any input events.
*/
static GType gimp_chain_line_get_type (void) G_GNUC_CONST;
static gboolean gimp_chain_line_expose_event (GtkWidget *widget,
GdkEventExpose *event);
struct _GimpChainLine
{
GtkWidget parent_instance;
GimpChainPosition position;
gint which;
};
typedef struct _GimpChainLine GimpChainLine;
typedef GtkWidgetClass GimpChainLineClass;
G_DEFINE_TYPE (GimpChainLine, gimp_chain_line, GTK_TYPE_WIDGET)
static void
gimp_chain_line_class_init (GimpChainLineClass *klass)
{
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
widget_class->expose_event = gimp_chain_line_expose_event;
}
static void
gimp_chain_line_init (GimpChainLine *line)
{
GTK_WIDGET_SET_FLAGS (line, GTK_NO_WINDOW);
}
static GtkWidget *
gimp_chain_line_new (GimpChainPosition position,
gint which)
{
GimpChainLine *line = g_object_new (gimp_chain_line_get_type (), NULL);
line->position = position;
line->which = which;
return GTK_WIDGET (line);
}
static gboolean
gimp_chain_line_expose_event (GtkWidget *widget,
GdkEventExpose *event)
{
GimpChainLine *line = ((GimpChainLine *) widget);
GdkPoint points[3];
GdkPoint buf;
GtkShadowType shadow;
GimpChainPosition position;
gint which_line;
#define SHORT_LINE 4
/* don't set this too high, there's no check against drawing outside
the widgets bounds yet (and probably never will be) */
g_return_val_if_fail (GIMP_IS_CHAIN_BUTTON (button), FALSE);
points[0].x = widget->allocation.x + widget->allocation.width / 2;
points[0].y = widget->allocation.y + widget->allocation.height / 2;
which_line = (widget == button->line1) ? 1 : -1;
position = button->position;
position = line->position;
if (gtk_widget_get_direction (widget) == GTK_TEXT_DIR_RTL)
{
@ -350,7 +392,7 @@ gimp_chain_button_draw_lines (GtkWidget *widget,
points[1].x = points[0].x - SHORT_LINE;
points[1].y = points[0].y;
points[2].x = points[1].x;
points[2].y = (which_line == 1 ?
points[2].y = (line->which == 1 ?
widget->allocation.y + widget->allocation.height - 1 :
widget->allocation.y);
shadow = GTK_SHADOW_ETCHED_IN;
@ -361,7 +403,7 @@ gimp_chain_button_draw_lines (GtkWidget *widget,
points[1].x = points[0].x + SHORT_LINE;
points[1].y = points[0].y;
points[2].x = points[1].x;
points[2].y = (which_line == 1 ?
points[2].y = (line->which == 1 ?
widget->allocation.y + widget->allocation.height - 1 :
widget->allocation.y);
shadow = GTK_SHADOW_ETCHED_OUT;
@ -371,7 +413,7 @@ gimp_chain_button_draw_lines (GtkWidget *widget,
points[0].y += SHORT_LINE;
points[1].x = points[0].x;
points[1].y = points[0].y - SHORT_LINE;
points[2].x = (which_line == 1 ?
points[2].x = (line->which == 1 ?
widget->allocation.x + widget->allocation.width - 1 :
widget->allocation.x);
points[2].y = points[1].y;
@ -382,7 +424,7 @@ gimp_chain_button_draw_lines (GtkWidget *widget,
points[0].y -= SHORT_LINE;
points[1].x = points[0].x;
points[1].y = points[0].y + SHORT_LINE;
points[2].x = (which_line == 1 ?
points[2].x = (line->which == 1 ?
widget->allocation.x + widget->allocation.width - 1 :
widget->allocation.x);
points[2].y = points[1].y;
@ -393,36 +435,21 @@ gimp_chain_button_draw_lines (GtkWidget *widget,
return FALSE;
}
if ( ((shadow == GTK_SHADOW_ETCHED_OUT) && (which_line == -1)) ||
((shadow == GTK_SHADOW_ETCHED_IN) && (which_line == 1)) )
if ( ((shadow == GTK_SHADOW_ETCHED_OUT) && (line->which == -1)) ||
((shadow == GTK_SHADOW_ETCHED_IN) && (line->which == 1)) )
{
buf = points[0];
points[0] = points[2];
points[2] = buf;
}
gtk_paint_polygon (widget->style,
widget->window,
GTK_STATE_NORMAL,
gtk_paint_polygon (widget->style, widget->window, GTK_STATE_NORMAL,
shadow,
&eevent->area,
&event->area,
widget,
"chainbutton",
points,
3,
points, 3,
FALSE);
return TRUE;
}
static void
gimp_chain_button_update_image (GimpChainButton *button)
{
guint i;
i = ((button->position & GIMP_CHAIN_LEFT) << 1) + (button->active ? 0 : 1);
gtk_image_set_from_stock (GTK_IMAGE (button->image),
gimp_chain_stock_items[i],
GTK_ICON_SIZE_BUTTON);
}