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#ifndef SCROLL_AREA_H
#define SCROLL_AREA_H
#include <cairo/cairo.h>
#include <gtk/gtk.h>
#define FOO_TYPE_SCROLL_AREA (foo_scroll_area_get_type ())
#define FOO_SCROLL_AREA(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), FOO_TYPE_SCROLL_AREA, FooScrollArea))
#define FOO_SCROLL_AREA_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), FOO_TYPE_SCROLL_AREA, FooScrollAreaClass))
#define FOO_IS_SCROLL_AREA(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), FOO_TYPE_SCROLL_AREA))
#define FOO_IS_SCROLL_AREA_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), FOO_TYPE_SCROLL_AREA))
#define FOO_SCROLL_AREA_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), FOO_TYPE_SCROLL_AREA, FooScrollAreaClass))
typedef struct FooScrollArea FooScrollArea;
typedef struct FooScrollAreaClass FooScrollAreaClass;
typedef struct FooScrollAreaPrivate FooScrollAreaPrivate;
typedef struct FooScrollAreaEvent FooScrollAreaEvent;
typedef enum
{
FOO_NONE,
FOO_BUTTON_PRESS,
FOO_BUTTON_RELEASE,
FOO_ENTER,
FOO_LEAVE,
FOO_MOTION
} FooScrollAreaEventType;
struct FooScrollAreaEvent
{
FooScrollAreaEventType type;
int x;
int y;
int button;
};
typedef void (* FooScrollAreaEventFunc) (FooScrollArea *area,
FooScrollAreaEvent *event,
gpointer data);
struct FooScrollArea
{
GtkContainer parent_instance;
FooScrollAreaPrivate *priv;
};
struct FooScrollAreaClass
{
GtkContainerClass parent_class;
void (*set_scroll_adjustments) (FooScrollArea *scroll_area,
GtkAdjustment *hadjustment,
GtkAdjustment *vadjustment);
void (*viewport_changed) (FooScrollArea *scroll_area,
GdkRectangle *viewport,
GdkRectangle *old_viewport);
void (*viewport_size_changed) (FooScrollArea *scroll_area,
GdkRectangle *viewport,
GdkRectangle *old_viewport);
void (*paint) (FooScrollArea *scroll_area,
cairo_t *cr,
GdkRectangle *extents,
GdkRegion *region);
};
GType foo_scroll_area_get_type (void);
FooScrollArea *foo_scroll_area_new (void);
/* Resizing
*/
/* Set the requisition for the widget. */
void foo_scroll_area_set_min_size (FooScrollArea *scroll_area,
int min_width,
int min_height);
/* Set how much of the canvas can be scrolled into view */
void foo_scroll_area_set_size (FooScrollArea *scroll_area,
int width,
int height);
void foo_scroll_area_set_size_fixed_y (FooScrollArea *scroll_area,
int width,
int height,
int old_y,
int new_y);
void foo_scroll_area_set_viewport_pos (FooScrollArea *scroll_area,
int x,
int y);
void foo_scroll_area_get_viewport (FooScrollArea *scroll_area,
GdkRectangle *viewport);
/* When the viewport_{size}_changed signals are emitted, this can be
* called to determine if the viewport change happened as a result of
* a resize. (Looking at the old and new size is insufficient because
* resizing may cause more than one viewport change.
*/
gboolean foo_scroll_area_is_resizing (FooScrollArea *scroll_area);
/* Input
*/
void foo_scroll_area_add_input_from_stroke (FooScrollArea *scroll_area,
cairo_t *cr,
FooScrollAreaEventFunc func,
gpointer data);
void foo_scroll_area_add_input_from_fill (FooScrollArea *scroll_area,
cairo_t *cr,
FooScrollAreaEventFunc func,
gpointer data);
/* Invalidate
*/
void foo_scroll_area_invalidate_region (FooScrollArea *area,
GdkRegion *region);
void foo_scroll_area_invalidate (FooScrollArea *scroll_area);
void foo_scroll_area_invalidate_rect (FooScrollArea *scroll_area,
int x,
int y,
int width,
int height);
/* Grabbing
*/
void foo_scroll_area_begin_grab (FooScrollArea *scroll_area,
FooScrollAreaEventFunc func,
gpointer input_data);
void foo_scroll_area_end_grab (FooScrollArea *scroll_area);
gboolean foo_scroll_area_is_grabbed (FooScrollArea *scroll_area);
/* Auto scroll
*/
void foo_scroll_area_begin_auto_scroll (FooScrollArea *scroll_area);
void foo_scroll_area_auto_scroll (FooScrollArea *scroll_area,
FooScrollAreaEvent *event);
void foo_scroll_area_end_auto_scroll (FooScrollArea *scroll_area);
/* Debug */
void foo_scroll_area_set_paint_updates (FooScrollArea *scroll_area,
gboolean paint_upd);
#endif
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