gtk2_ardour/canvas-imageframe.h

   1 /* Image item type for GnomeCanvas widget
   2  *
   3  * GnomeCanvas is basically a port of the Tk toolkit's most excellent canvas widget.  Tk is
   4  * copyrighted by the Regents of the University of California, Sun Microsystems, and other parties.
   5  *
   6  * Copyright (C) 1998 The Free Software Foundation
   7  *
   8  * Author: Federico Mena <federico@nuclecu.unam.mx>
   9  */
  10
  11
  12 #ifndef __GNOME_CANVAS_IMAGEFRAME_H__
  13 #define __GNOME_CANVAS_IMAGEFRAME_H__
  14
  15 #include <stdint.h>
  16
  17 #include <libgnomecanvas/libgnomecanvas.h>
  18 #include <gtk/gtkenums.h>
  19
  20 #ifdef __cplusplus
  21 extern "C" {
  22 #endif
  23 #include <libart_lgpl/art_misc.h>
  24 #ifdef __cplusplus
  25 }
  26 #endif
  27
  28 #include <libart_lgpl/art_pixbuf.h>
  29
  30
  31 G_BEGIN_DECLS
  32
  33
  34 /* Image item for the canvas.  Images are positioned by anchoring them to a point.
  35  * The following arguments are available:
  36  *
  37  * name         type                    read/write      description
  38  * ------------------------------------------------------------------------------------------
  39  * pixbuf     ArtPixBuf*      W         Pointer to an ArtPixBuf (aa-mode)
  40  * x          double          RW                X coordinate of anchor point
  41  * y          double          RW                Y coordinate of anchor point
  42  * width      double          RW                Width to scale image to, in canvas units
  43  * height     double          RW                Height to scale image to, in canvas units
  44  * drawwidth  double          RW                Width to scale image to, in canvas units
  45  * anchor     GtkAnchorType   RW                Anchor side for the image
  46  */
  47
  48
  49 #define GNOME_CANVAS_TYPE_CANVAS_IMAGEFRAME            (gnome_canvas_imageframe_get_type ())
  50 #define GNOME_CANVAS_IMAGEFRAME(obj)                   (GTK_CHECK_CAST ((obj), GNOME_CANVAS_TYPE_CANVAS_IMAGEFRAME, GnomeCanvasImageFrame))
  51 #define GNOME_CANVAS_IMAGEFRAME_CLASS(klass)           (GTK_CHECK_CLASS_CAST ((klass), GNOME_CANVAS_TYPE_CANVAS_IMAGEFRAME, GnomeCanvasImageFrameClass))
  52 #define GNOME_CANVAS_IS_CANVAS_IMAGEFRAME(obj)         (GTK_CHECK_TYPE ((obj), GNOME_CANVAS_TYPE_CANVAS_IMAGEFRAME))
  53 #define GNOME_CANVAS_IS_CANVAS_IMAGEFRAME_CLASS(klass) (GTK_CHECK_CLASS_TYPE ((klass), GNOME_CANVAS_TYPE_CANVAS_IMAGEFRAME))
  54
  55
  56 typedef struct _GnomeCanvasImageFrame GnomeCanvasImageFrame;
  57 typedef struct _GnomeCanvasImageFrameClass GnomeCanvasImageFrameClass;
  58
  59 struct _GnomeCanvasImageFrame {
  60         GnomeCanvasItem item;
  61
  62         double x, y;                    /* Position at anchor, item relative */
  63         double width, height;           /* Size of image, item relative */
  64         double drawwidth ;              /* the amount of the image we draw width-wise (0-drawwidth)*/
  65         GtkAnchorType anchor;           /* Anchor side for image */
  66
  67         int cx, cy;                     /* Top-left canvas coordinates for display */
  68         int cwidth, cheight;            /* Rendered size in pixels */
  69
  70         uint32_t need_recalc : 1;       /* Do we need to rescale the image? */
  71
  72         ArtPixBuf *pixbuf;              /* A pixbuf, for aa rendering */
  73         double affine[6];               /* The item -> canvas affine */
  74 };
  75
  76 struct _GnomeCanvasImageFrameClass {
  77         GnomeCanvasItemClass parent_class;
  78 };
  79
  80
  81 /* Standard Gtk function */
  82 GtkType gnome_canvas_imageframe_get_type (void);
  83
  84
  85 G_END_DECLS
  86
  87 #endif