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Diffstat (limited to 'ganv/canvas-base.h')
| -rw-r--r-- | ganv/canvas-base.h | 213 |
1 files changed, 0 insertions, 213 deletions
diff --git a/ganv/canvas-base.h b/ganv/canvas-base.h deleted file mode 100644 index 8299132..0000000 --- a/ganv/canvas-base.h +++ /dev/null @@ -1,213 +0,0 @@ -/* This file is part of Ganv. - * Copyright 2007-2012 David Robillard <http://drobilla.net> - * - * Ganv is free software: you can redistribute it and/or modify it under the - * terms of the GNU General Public License as published by the Free Software - * Foundation, either version 3 of the License, or any later version. - * - * Ganv is distributed in the hope that it will be useful, but WITHOUT ANY - * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS - * FOR A PARTICULAR PURPOSE. See the GNU General Public License for details. - * - * You should have received a copy of the GNU General Public License along - * with Ganv. If not, see <http://www.gnu.org/licenses/>. - */ - -/* Based on GnomeCanvas, by Federico Mena <federico@nuclecu.unam.mx> - * and Raph Levien <raph@gimp.org> - * Copyright 1997-2000 Free Software Foundation - */ - -#ifndef GANV_CANVAS_BASE_H -#define GANV_CANVAS_BASE_H - -#include <stdarg.h> - -#include <cairo.h> -#include <gtk/gtk.h> - -#include "ganv/item.h" - -G_BEGIN_DECLS - -typedef struct _GanvCanvasBase GanvCanvasBase; -typedef struct _GanvCanvasBaseClass GanvCanvasBaseClass; - -/* Update flags for items */ -enum { - GANV_CANVAS_BASE_UPDATE_REQUESTED = 1 << 0, - GANV_CANVAS_BASE_UPDATE_AFFINE = 1 << 1, - GANV_CANVAS_BASE_UPDATE_VISIBILITY = 1 << 2, -}; - -#define GANV_TYPE_CANVAS_BASE (ganv_canvas_base_get_type()) -#define GANV_CANVAS_BASE(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj), GANV_TYPE_CANVAS_BASE, GanvCanvasBase)) -#define GANV_CANVAS_BASE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass), GANV_TYPE_CANVAS_BASE, GanvCanvasBaseClass)) -#define GANV_IS_CANVAS_BASE(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj), GANV_TYPE_CANVAS_BASE)) -#define GANV_IS_CANVAS_BASE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE((klass), GANV_TYPE_CANVAS_BASE)) -#define GANV_CANVAS_BASE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj), GANV_TYPE_CANVAS_BASE, GanvCanvasBaseClass)) - -struct _GanvCanvasBase { - GtkLayout layout; - - /* Root canvas item */ - GanvItem* root; - - /* Region that needs redrawing (list of rectangles) */ - GSList* redraw_region; - - /* The item containing the mouse pointer, or NULL if none */ - GanvItem* current_item; - - /* Item that is about to become current (used to track deletions and such) */ - GanvItem* new_current_item; - - /* Item that holds a pointer grab, or NULL if none */ - GanvItem* grabbed_item; - - /* If non-NULL, the currently focused item */ - GanvItem* focused_item; - - /* GC for temporary draw pixmap */ - GdkGC* pixmap_gc; - - /* Event on which selection of current item is based */ - GdkEvent pick_event; - - /* Scrolling region */ - double scroll_x1, scroll_y1; - double scroll_x2, scroll_y2; - - /* Scaling factor to be used for display */ - double pixels_per_unit; - - /* Idle handler ID */ - guint idle_id; - - /* Signal handler ID for destruction of the root item */ - guint root_destroy_id; - - /* Area that is being redrawn. Contains (x1, y1) but not (x2, y2). - * Specified in canvas pixel coordinates. - */ - int redraw_x1, redraw_y1; - int redraw_x2, redraw_y2; - - /* Offsets of the temprary drawing pixmap */ - int draw_xofs, draw_yofs; - - /* Internal pixel offsets when zoomed out */ - int zoom_xofs, zoom_yofs; - - /* Last known modifier state, for deferred repick when a button is down */ - int state; - - /* Event mask specified when grabbing an item */ - guint grabbed_event_mask; - - /* Tolerance distance for picking items */ - int close_enough; - - /* Whether the canvas should center the scroll region in the middle of - * the window if the scroll region is smaller than the window. - */ - unsigned int center_scroll_region : 1; - - /* Whether items need update at next idle loop iteration */ - unsigned int need_update : 1; - - /* Whether the canvas needs redrawing at the next idle loop iteration */ - unsigned int need_redraw : 1; - - /* Whether current item will be repicked at next idle loop iteration */ - unsigned int need_repick : 1; - - /* For use by internal pick_current_item() function */ - unsigned int left_grabbed_item : 1; - - /* For use by internal pick_current_item() function */ - unsigned int in_repick : 1; -}; - -struct _GanvCanvasBaseClass { - GtkLayoutClass parent_class; - - /* Private Virtual methods for groping the canvas inside bonobo */ - void (* request_update)(GanvCanvasBase* canvas); - - /* Reserved for future expansion */ - gpointer spare_vmethods [4]; -}; - -GType ganv_canvas_base_get_type(void) G_GNUC_CONST; - -/* Creates a new canvas. You should check that the canvas is created with the - * proper visual and colormap. Any visual will do unless you intend to insert - * gdk_imlib images into it, in which case you should use the gdk_imlib visual. - * - * You should call ganv_canvas_base_set_scroll_region() soon after calling this - * function to set the desired scrolling limits for the canvas. - */ -GtkWidget* ganv_canvas_base_new(void); - -/* Returns the root item of the canvas */ -GanvItem* ganv_canvas_base_root(GanvCanvasBase* canvas); - -/* Sets the limits of the scrolling region, in world coordinates */ -void ganv_canvas_base_set_scroll_region(GanvCanvasBase* canvas, - double x1, double y1, double x2, double y2); - -/* Gets the limits of the scrolling region, in world coordinates */ -void ganv_canvas_base_get_scroll_region(GanvCanvasBase* canvas, - double* x1, double* y1, double* x2, double* y2); - -/* Whether the canvas centers the scroll region if it is smaller than the window */ -void ganv_canvas_base_set_center_scroll_region(GanvCanvasBase* canvas, gboolean center_scroll_region); - -/* Returns whether the canvas is set to center the scroll region if it is smaller than the window */ -gboolean ganv_canvas_base_get_center_scroll_region(GanvCanvasBase* canvas); - -/* Sets the number of pixels that correspond to one unit in world coordinates */ -void ganv_canvas_base_set_pixels_per_unit(GanvCanvasBase* canvas, double n); - -/* Scrolls the canvas to the specified offsets, given in canvas pixel coordinates */ -void ganv_canvas_base_scroll_to(GanvCanvasBase* canvas, int cx, int cy); - -/* Returns the scroll offsets of the canvas in canvas pixel coordinates. You - * can specify NULL for any of the values, in which case that value will not be - * queried. - */ -void ganv_canvas_base_get_scroll_offsets(GanvCanvasBase* canvas, int* cx, int* cy); - -/* Returns the item that is at the specified position in world coordinates, or - * NULL if no item is there. - */ -GanvItem* ganv_canvas_base_get_item_at(GanvCanvasBase* canvas, double x, double y); - -/* Gets the affine transform that converts world coordinates into canvas pixel - * coordinates. - */ -void ganv_canvas_base_w2c_affine(GanvCanvasBase* canvas, cairo_matrix_t* matrix); - -/* These functions convert from a coordinate system to another. "w" is world - * coordinates, "c" is canvas pixel coordinates (pixel coordinates that are - * (0,0) for the upper-left scrolling limit and something else for the - * lower-left scrolling limit). - */ -void ganv_canvas_base_w2c(GanvCanvasBase* canvas, double wx, double wy, int* cx, int* cy); -void ganv_canvas_base_w2c_d(GanvCanvasBase* canvas, double wx, double wy, double* cx, double* cy); -void ganv_canvas_base_c2w(GanvCanvasBase* canvas, int cx, int cy, double* wx, double* wy); - -/* This function takes in coordinates relative to the GTK_LAYOUT - * (canvas)->bin_window and converts them to world coordinates. - */ -void ganv_canvas_base_window_to_world(GanvCanvasBase* canvas, - double winx, double winy, double* worldx, double* worldy); - -/* This is the inverse of ganv_canvas_base_window_to_world() */ -void ganv_canvas_base_world_to_window(GanvCanvasBase* canvas, - double worldx, double worldy, double* winx, double* winy); - -G_END_DECLS - -#endif |