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gimp/app/widgets/gimpcursor.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* This program 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
* (at your option) any later version.
*
* This program 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 more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "widgets-types.h"
#include "gimpcursor.h"
#include "cursors/gimp-tool-cursors.h"
#define cursor_default_x_hot 10
#define cursor_default_y_hot 10
#define cursor_mouse_x_hot 3
#define cursor_mouse_y_hot 2
#define cursor_crosshair_x_hot 15
#define cursor_crosshair_y_hot 15
#define cursor_zoom_x_hot 8
#define cursor_zoom_y_hot 8
#define cursor_color_picker_x_hot 1
#define cursor_color_picker_y_hot 30
typedef struct _GimpCursor GimpCursor;
struct _GimpCursor
{
const guint8 *pixbuf_data;
const gint x_hot, y_hot;
GdkPixbuf *pixbuf;
};
static GimpCursor gimp_cursors[] =
{
/* these have to match up with enum GimpCursorType in widgets-enums.h */
{
cursor_none,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_mouse,
cursor_mouse_x_hot, cursor_mouse_y_hot
},
{
cursor_crosshair,
cursor_crosshair_x_hot, cursor_crosshair_y_hot
},
{
cursor_crosshair_small,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_bad,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_move,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_zoom,
cursor_zoom_x_hot, cursor_zoom_y_hot
},
{
cursor_color_picker,
cursor_color_picker_x_hot, cursor_color_picker_y_hot
},
{
cursor_corner_top,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_corner_top_right,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_corner_right,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_corner_bottom_right,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_corner_bottom,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_corner_bottom_left,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_corner_left,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_corner_top_left,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_side_top,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_side_top_right,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_side_right,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_side_bottom_right,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_side_bottom,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_side_bottom_left,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_side_left,
cursor_default_x_hot, cursor_default_y_hot
},
{
cursor_side_top_left,
cursor_default_x_hot, cursor_default_y_hot
}
};
static GimpCursor gimp_tool_cursors[] =
{
/* these have to match up with enum GimpToolCursorType in widgets-enums.h */
{ NULL },
{ tool_rect_select },
{ tool_ellipse_select },
{ tool_free_select },
{ tool_polygon_select },
{ tool_fuzzy_select },
{ tool_paths },
{ tool_paths_anchor },
{ tool_paths_control },
{ tool_paths_segment },
{ tool_iscissors },
{ tool_move },
{ tool_zoom },
{ tool_crop },
{ tool_resize },
{ tool_rotate },
{ tool_shear },
{ tool_perspective },
{ tool_flip_horizontal },
{ tool_flip_vertical },
{ tool_text },
{ tool_color_picker },
{ tool_bucket_fill },
{ tool_blend },
{ tool_pencil },
{ tool_paintbrush },
{ tool_airbrush },
{ tool_ink },
{ tool_clone },
{ tool_heal },
{ tool_eraser },
{ tool_smudge },
{ tool_blur },
{ tool_dodge },
{ tool_burn },
{ tool_measure },
{ tool_hand }
};
static GimpCursor gimp_cursor_modifiers[] =
{
/* these have to match up with enum GimpCursorModifier in widgets-enums.h */
{ NULL },
{ modifier_bad },
{ modifier_plus },
{ modifier_minus },
{ modifier_intersect },
{ modifier_move },
{ modifier_resize },
{ modifier_control },
{ modifier_anchor },
{ modifier_foreground },
{ modifier_background },
{ modifier_pattern },
{ modifier_join },
{ modifier_select }
};
static const GdkPixbuf *
get_cursor_pixbuf (GimpCursor *cursor)
{
if (! cursor->pixbuf)
cursor->pixbuf = gdk_pixbuf_new_from_inline (-1,
cursor->pixbuf_data,
FALSE, NULL);
g_return_val_if_fail (cursor->pixbuf != NULL, NULL);
return cursor->pixbuf;
}
GdkCursor *
gimp_cursor_new (GdkDisplay *display,
GimpHandedness cursor_handedness,
GimpCursorType cursor_type,
GimpToolCursorType tool_cursor,
GimpCursorModifier modifier)
{
GimpCursor *bmcursor = NULL;
GimpCursor *bmmodifier = NULL;
GimpCursor *bmtool = NULL;
GdkCursor *cursor;
GdkPixbuf *pixbuf;
g_return_val_if_fail (GDK_IS_DISPLAY (display), NULL);
g_return_val_if_fail (cursor_type < GIMP_CURSOR_LAST, NULL);
if (cursor_type <= (GimpCursorType) GDK_LAST_CURSOR)
return gdk_cursor_new_for_display (display, cursor_type);
g_return_val_if_fail (cursor_type >= GIMP_CURSOR_NONE, NULL);
/* disallow the small tool cursor with some cursors
*/
if (cursor_type <= GIMP_CURSOR_NONE ||
cursor_type == GIMP_CURSOR_CROSSHAIR ||
cursor_type == GIMP_CURSOR_ZOOM ||
cursor_type == GIMP_CURSOR_COLOR_PICKER ||
cursor_type >= GIMP_CURSOR_LAST)
{
tool_cursor = GIMP_TOOL_CURSOR_NONE;
}
/* don't allow anything with the empty cursor
*/
if (cursor_type == GIMP_CURSOR_NONE)
{
tool_cursor = GIMP_TOOL_CURSOR_NONE;
modifier = GIMP_CURSOR_MODIFIER_NONE;
}
/* some more sanity checks
*/
if (cursor_type == GIMP_CURSOR_MOVE &&
modifier == GIMP_CURSOR_MODIFIER_MOVE)
{
modifier = GIMP_CURSOR_MODIFIER_NONE;
}
/* when cursor is "corner" or "side" sides must be exchanged for
* left-hand-mice-flipping of pixbuf below
*/
if (cursor_handedness == GIMP_HANDEDNESS_LEFT)
{
switch (cursor_type)
{
case GIMP_CURSOR_CORNER_TOP_LEFT:
cursor_type = GIMP_CURSOR_CORNER_TOP_RIGHT; break;
case GIMP_CURSOR_CORNER_TOP_RIGHT:
cursor_type = GIMP_CURSOR_CORNER_TOP_LEFT; break;
case GIMP_CURSOR_CORNER_LEFT:
cursor_type = GIMP_CURSOR_CORNER_RIGHT; break;
case GIMP_CURSOR_CORNER_RIGHT:
cursor_type = GIMP_CURSOR_CORNER_LEFT; break;
case GIMP_CURSOR_CORNER_BOTTOM_LEFT:
cursor_type = GIMP_CURSOR_CORNER_BOTTOM_RIGHT; break;
case GIMP_CURSOR_CORNER_BOTTOM_RIGHT:
cursor_type = GIMP_CURSOR_CORNER_BOTTOM_LEFT; break;
case GIMP_CURSOR_SIDE_TOP_LEFT:
cursor_type = GIMP_CURSOR_SIDE_TOP_RIGHT; break;
case GIMP_CURSOR_SIDE_TOP_RIGHT:
cursor_type = GIMP_CURSOR_SIDE_TOP_LEFT; break;
case GIMP_CURSOR_SIDE_LEFT:
cursor_type = GIMP_CURSOR_SIDE_RIGHT; break;
case GIMP_CURSOR_SIDE_RIGHT:
cursor_type = GIMP_CURSOR_SIDE_LEFT; break;
case GIMP_CURSOR_SIDE_BOTTOM_LEFT:
cursor_type = GIMP_CURSOR_SIDE_BOTTOM_RIGHT; break;
case GIMP_CURSOR_SIDE_BOTTOM_RIGHT:
cursor_type = GIMP_CURSOR_SIDE_BOTTOM_LEFT; break;
default:
break;
}
}
/* prepare the main cursor */
cursor_type -= GIMP_CURSOR_NONE;
bmcursor = &gimp_cursors[cursor_type];
/* prepare the tool cursor */
if (tool_cursor > GIMP_TOOL_CURSOR_NONE &&
tool_cursor < GIMP_TOOL_CURSOR_LAST)
{
bmtool = &gimp_tool_cursors[tool_cursor];
}
/* prepare the cursor modifier */
if (modifier > GIMP_CURSOR_MODIFIER_NONE &&
modifier < GIMP_CURSOR_MODIFIER_LAST)
{
bmmodifier = &gimp_cursor_modifiers[modifier];
}
pixbuf = gdk_pixbuf_copy (get_cursor_pixbuf (bmcursor));
if (bmmodifier || bmtool)
{
gint width = gdk_pixbuf_get_width (pixbuf);
gint height = gdk_pixbuf_get_height (pixbuf);
if (bmmodifier)
gdk_pixbuf_composite (get_cursor_pixbuf (bmmodifier), pixbuf,
0, 0, width, height,
0.0, 0.0, 1.0, 1.0,
GDK_INTERP_NEAREST, 200);
if (bmtool)
gdk_pixbuf_composite (get_cursor_pixbuf (bmtool), pixbuf,
0, 0, width, height,
0.0, 0.0, 1.0, 1.0,
GDK_INTERP_NEAREST, 200);
}
/* flip the cursor if mouse setting is left-handed */
if (cursor_handedness == GIMP_HANDEDNESS_LEFT)
{
GdkPixbuf *flipped = gdk_pixbuf_flip (pixbuf, TRUE);
gint width = gdk_pixbuf_get_width (flipped);
cursor = gdk_cursor_new_from_pixbuf (display, flipped,
(width - 1) - bmcursor->x_hot,
bmcursor->y_hot);
g_object_unref (flipped);
}
else
{
cursor = gdk_cursor_new_from_pixbuf (display, pixbuf,
bmcursor->x_hot,
bmcursor->y_hot);
}
g_object_unref (pixbuf);
return cursor;
}
void
gimp_cursor_set (GtkWidget *widget,
GimpHandedness cursor_handedness,
GimpCursorType cursor_type,
GimpToolCursorType tool_cursor,
GimpCursorModifier modifier)
{
GdkCursor *cursor;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (gtk_widget_get_realized (widget));
cursor = gimp_cursor_new (gtk_widget_get_display (widget),
cursor_handedness,
cursor_type,
tool_cursor,
modifier);
gdk_window_set_cursor (gtk_widget_get_window (widget), cursor);
gdk_cursor_unref (cursor);
}
GimpCursorType
gimp_cursor_rotate (GimpCursorType cursor,
gdouble angle)
{
if (cursor >= GIMP_CURSOR_CORNER_TOP &&
cursor <= GIMP_CURSOR_SIDE_TOP_LEFT)
{
gint offset = (gint) (angle / 45 + 0.5);
if (cursor < GIMP_CURSOR_SIDE_TOP)
{
cursor += offset;
if (cursor > GIMP_CURSOR_CORNER_TOP_LEFT)
cursor -= 8;
}
else
{
cursor += offset;
if (cursor > GIMP_CURSOR_SIDE_TOP_LEFT)
cursor -= 8;
}
}
return cursor;
}
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