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gimp/app/tools/gimpdrawtool.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995-2001 Spencer Kimball, Peter Mattis, and others
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "tools-types.h"
#include "display/gimpdisplay.h"
#include "display/gimpdisplayshell.h"
#include "gimpdrawtool.h"
static void gimp_draw_tool_class_init (GimpDrawToolClass *klass);
static void gimp_draw_tool_init (GimpDrawTool *draw_tool);
static void gimp_draw_tool_finalize (GObject *object);
static void gimp_draw_tool_control (GimpTool *tool,
ToolAction action,
GimpDisplay *gdisp);
static inline void gimp_draw_tool_shift_to_north_west
(gdouble x,
gdouble y,
gint handle_width,
gint handle_height,
GtkAnchorType anchor,
gdouble *shifted_x,
gdouble *shifted_y);
static inline void gimp_draw_tool_shift_to_center
(gdouble x,
gdouble y,
gint handle_width,
gint handle_height,
GtkAnchorType anchor,
gdouble *shifted_x,
gdouble *shifted_y);
static GimpToolClass *parent_class = NULL;
GType
gimp_draw_tool_get_type (void)
{
static GType tool_type = 0;
if (! tool_type)
{
static const GTypeInfo tool_info =
{
sizeof (GimpDrawToolClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gimp_draw_tool_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GimpDrawTool),
0, /* n_preallocs */
(GInstanceInitFunc) gimp_draw_tool_init,
};
tool_type = g_type_register_static (GIMP_TYPE_TOOL,
"GimpDrawTool",
&tool_info, 0);
}
return tool_type;
}
static void
gimp_draw_tool_class_init (GimpDrawToolClass *klass)
{
GObjectClass *object_class;
GimpToolClass *tool_class;
object_class = G_OBJECT_CLASS (klass);
tool_class = GIMP_TOOL_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gimp_draw_tool_finalize;
tool_class->control = gimp_draw_tool_control;
klass->draw = NULL;
}
static void
gimp_draw_tool_init (GimpDrawTool *draw_tool)
{
draw_tool->draw_state = GIMP_DRAW_TOOL_STATE_INVISIBLE;
draw_tool->win = NULL;
draw_tool->gc = NULL;
draw_tool->paused_count = 0;
draw_tool->line_width = 0;
draw_tool->line_style = GDK_LINE_SOLID;
draw_tool->cap_style = GDK_CAP_NOT_LAST;
draw_tool->join_style = GDK_JOIN_MITER;
}
static void
gimp_draw_tool_finalize (GObject *object)
{
GimpDrawTool *draw_tool;
draw_tool = GIMP_DRAW_TOOL (object);
if (draw_tool->gc)
{
g_object_unref (G_OBJECT (draw_tool->gc));
draw_tool->gc = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gimp_draw_tool_control (GimpTool *tool,
ToolAction action,
GimpDisplay *gdisp)
{
GimpDrawTool *draw_tool;
draw_tool = GIMP_DRAW_TOOL (tool);
switch (action)
{
case PAUSE:
gimp_draw_tool_pause (draw_tool);
break;
case RESUME:
gimp_draw_tool_resume (draw_tool);
break;
case HALT:
gimp_draw_tool_stop (draw_tool);
break;
default:
break;
}
GIMP_TOOL_CLASS (parent_class)->control (tool, action, gdisp);
}
void
gimp_draw_tool_start (GimpDrawTool *draw_tool,
GdkWindow *win)
{
GdkColor fg, bg;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
g_return_if_fail (GDK_IS_WINDOW (win));
if (draw_tool->draw_state != GIMP_DRAW_TOOL_STATE_INVISIBLE)
gimp_draw_tool_stop (draw_tool); /* this seems backwards ;) */
draw_tool->win = win;
draw_tool->paused_count = 0; /* reset pause counter to 0 */
/* create a new graphics context */
if (! draw_tool->gc)
draw_tool->gc = gdk_gc_new (win);
gdk_gc_set_function (draw_tool->gc, GDK_INVERT);
fg.pixel = 0xFFFFFFFF;
bg.pixel = 0x00000000;
gdk_gc_set_foreground (draw_tool->gc, &fg);
gdk_gc_set_background (draw_tool->gc, &bg);
gdk_gc_set_line_attributes (draw_tool->gc,
draw_tool->line_width,
draw_tool->line_style,
draw_tool->cap_style,
draw_tool->join_style);
GIMP_DRAW_TOOL_GET_CLASS (draw_tool)->draw (draw_tool);
draw_tool->draw_state = GIMP_DRAW_TOOL_STATE_VISIBLE;
}
void
gimp_draw_tool_stop (GimpDrawTool *draw_tool)
{
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
if (draw_tool->draw_state == GIMP_DRAW_TOOL_STATE_INVISIBLE)
return;
GIMP_DRAW_TOOL_GET_CLASS (draw_tool)->draw (draw_tool);
draw_tool->draw_state = GIMP_DRAW_TOOL_STATE_INVISIBLE;
}
void
gimp_draw_tool_pause (GimpDrawTool *draw_tool)
{
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
if (draw_tool->paused_count == 0)
{
draw_tool->draw_state = GIMP_DRAW_TOOL_STATE_INVISIBLE;
GIMP_DRAW_TOOL_GET_CLASS (draw_tool)->draw (draw_tool);
}
draw_tool->paused_count++;
}
void
gimp_draw_tool_resume (GimpDrawTool *draw_tool)
{
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
if (draw_tool->paused_count > 0)
draw_tool->paused_count--;
if (draw_tool->paused_count == 0)
{
draw_tool->draw_state = GIMP_DRAW_TOOL_STATE_VISIBLE;
GIMP_DRAW_TOOL_GET_CLASS (draw_tool)->draw (draw_tool);
}
}
gdouble
gimp_draw_tool_calc_distance (GimpDrawTool *draw_tool,
GimpDisplay *gdisp,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2)
{
gdouble tx1, ty1;
gdouble tx2, ty2;
g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), 0.0);
g_return_val_if_fail (GIMP_IS_DISPLAY (gdisp), 0.0);
gdisplay_transform_coords_f (gdisp, x1, y1, &tx1, &ty1, FALSE);
gdisplay_transform_coords_f (gdisp, x2, y2, &tx2, &ty2, FALSE);
return sqrt (SQR (tx2 - tx1) + SQR (ty2 - ty1));
}
gboolean
gimp_draw_tool_in_radius (GimpDrawTool *draw_tool,
GimpDisplay *gdisp,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2,
gint radius)
{
gdouble tx1, ty1;
gdouble tx2, ty2;
g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), FALSE);
g_return_val_if_fail (GIMP_IS_DISPLAY (gdisp), FALSE);
gdisplay_transform_coords_f (gdisp, x1, y1, &tx1, &ty1, FALSE);
gdisplay_transform_coords_f (gdisp, x2, y2, &tx2, &ty2, FALSE);
return (SQR (tx2 - tx1) + SQR (ty2 - ty1)) < SQR (radius);
}
void
gimp_draw_tool_draw_line (GimpDrawTool *draw_tool,
gdouble x1,
gdouble y1,
gdouble x2,
gdouble y2,
gboolean use_offsets)
{
GimpTool *tool;
GimpDisplayShell *shell;
gdouble tx1, ty1;
gdouble tx2, ty2;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
tool = GIMP_TOOL (draw_tool);
shell = GIMP_DISPLAY_SHELL (tool->gdisp->shell);
gdisplay_transform_coords_f (tool->gdisp, x1, y1, &tx1, &ty1, use_offsets);
gdisplay_transform_coords_f (tool->gdisp, x2, y2, &tx2, &ty2, use_offsets);
gdk_draw_line (draw_tool->win,
draw_tool->gc,
RINT (tx1), RINT (ty1),
RINT (tx2), RINT (ty2));
}
void
gimp_draw_tool_draw_rectangle (GimpDrawTool *draw_tool,
gboolean filled,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
gboolean use_offsets)
{
GimpTool *tool;
GimpDisplayShell *shell;
gdouble tx1, ty1;
gdouble tx2, ty2;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
tool = GIMP_TOOL (draw_tool);
shell = GIMP_DISPLAY_SHELL (tool->gdisp->shell);
tx1 = MIN (x, x + width);
ty1 = MIN (y, y + height);
tx2 = MAX (x, x + width);
ty2 = MAX (y, y + height);
gdisplay_transform_coords_f (tool->gdisp, tx1, ty1, &tx1, &ty1, use_offsets);
gdisplay_transform_coords_f (tool->gdisp, tx2, ty2, &tx2, &ty2, use_offsets);
gdk_draw_rectangle (draw_tool->win,
draw_tool->gc,
filled,
RINT (tx1), RINT (ty1),
RINT (tx2 - tx1), RINT (ty2 - ty1));
}
void
gimp_draw_tool_draw_arc (GimpDrawTool *draw_tool,
gboolean filled,
gdouble x,
gdouble y,
gdouble width,
gdouble height,
gint angle1,
gint angle2,
gboolean use_offsets)
{
GimpTool *tool;
GimpDisplayShell *shell;
gdouble tx1, ty1;
gdouble tx2, ty2;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
tool = GIMP_TOOL (draw_tool);
shell = GIMP_DISPLAY_SHELL (tool->gdisp->shell);
tx1 = MIN (x, x + width);
ty1 = MIN (y, y + height);
tx2 = MAX (x, x + width);
ty2 = MAX (y, y + height);
gdisplay_transform_coords_f (tool->gdisp, tx1, ty1, &tx1, &ty1, use_offsets);
gdisplay_transform_coords_f (tool->gdisp, tx2, ty2, &tx2, &ty2, use_offsets);
gdk_draw_arc (draw_tool->win,
draw_tool->gc,
filled,
RINT (tx1), RINT (ty1),
RINT (tx2 - tx1), RINT (ty2 - ty1),
angle1, angle2);
}
void
gimp_draw_tool_draw_rectangle_by_anchor (GimpDrawTool *draw_tool,
gboolean filled,
gdouble x,
gdouble y,
gint width,
gint height,
GtkAnchorType anchor,
gboolean use_offsets)
{
GimpTool *tool;
GimpDisplayShell *shell;
gdouble tx, ty;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
tool = GIMP_TOOL (draw_tool);
shell = GIMP_DISPLAY_SHELL (tool->gdisp->shell);
gdisplay_transform_coords_f (tool->gdisp, x, y, &tx, &ty, use_offsets);
gimp_draw_tool_shift_to_north_west (tx, ty,
width, height,
anchor,
&tx, &ty);
if (filled)
{
width++;
height++;
}
gdk_draw_rectangle (draw_tool->win,
draw_tool->gc,
filled,
RINT (tx), RINT (ty),
width, height);
}
void
gimp_draw_tool_draw_arc_by_anchor (GimpDrawTool *draw_tool,
gboolean filled,
gdouble x,
gdouble y,
gint radius_x,
gint radius_y,
gint angle1,
gint angle2,
GtkAnchorType anchor,
gboolean use_offsets)
{
GimpTool *tool;
GimpDisplayShell *shell;
gdouble tx, ty;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
tool = GIMP_TOOL (draw_tool);
shell = GIMP_DISPLAY_SHELL (tool->gdisp->shell);
gdisplay_transform_coords_f (tool->gdisp, x, y, &tx, &ty, use_offsets);
/* well... */
radius_x *= 2;
radius_y *= 2;
gimp_draw_tool_shift_to_north_west (tx, ty,
radius_x, radius_y,
anchor,
&tx, &ty);
if (filled)
{
radius_x += 1;
radius_y += 1;
}
gdk_draw_arc (draw_tool->win,
draw_tool->gc,
filled,
RINT (tx), RINT (ty),
radius_x, radius_y,
angle1, angle2);
}
void
gimp_draw_tool_draw_cross_by_anchor (GimpDrawTool *draw_tool,
gdouble x,
gdouble y,
gint width,
gint height,
GtkAnchorType anchor,
gboolean use_offsets)
{
GimpTool *tool;
GimpDisplayShell *shell;
gdouble tx, ty;
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
tool = GIMP_TOOL (draw_tool);
shell = GIMP_DISPLAY_SHELL (tool->gdisp->shell);
gdisplay_transform_coords_f (tool->gdisp, x, y, &tx, &ty, use_offsets);
gimp_draw_tool_shift_to_center (tx, ty,
width, height,
anchor,
&tx, &ty);
gdk_draw_line (draw_tool->win,
draw_tool->gc,
RINT (tx), RINT (ty) - (height >> 1),
RINT (tx), RINT (ty) + (height >> 1));
gdk_draw_line (draw_tool->win,
draw_tool->gc,
RINT (tx) - (width >> 1), RINT (ty),
RINT (tx) + (width >> 1), RINT (ty));
}
void
gimp_draw_tool_draw_handle (GimpDrawTool *draw_tool,
GimpHandleType type,
gdouble x,
gdouble y,
gint width,
gint height,
GtkAnchorType anchor,
gboolean use_offsets)
{
g_return_if_fail (GIMP_IS_DRAW_TOOL (draw_tool));
switch (type)
{
case GIMP_HANDLE_SQUARE:
gimp_draw_tool_draw_rectangle_by_anchor (draw_tool,
FALSE,
x, y,
width,
height,
anchor,
use_offsets);
break;
case GIMP_HANDLE_FILLED_SQUARE:
gimp_draw_tool_draw_rectangle_by_anchor (draw_tool,
TRUE,
x, y,
width,
height,
anchor,
use_offsets);
break;
case GIMP_HANDLE_CIRCLE:
gimp_draw_tool_draw_arc_by_anchor (draw_tool,
FALSE,
x, y,
width >> 1,
height >> 1,
0, 360 * 64,
anchor,
use_offsets);
break;
case GIMP_HANDLE_FILLED_CIRCLE:
gimp_draw_tool_draw_arc_by_anchor (draw_tool,
TRUE,
x, y,
width >> 1,
height >> 1,
0, 360 * 64,
anchor,
use_offsets);
break;
case GIMP_HANDLE_CROSS:
gimp_draw_tool_draw_cross_by_anchor (draw_tool,
x, y,
width,
height,
anchor,
use_offsets);
break;
default:
g_warning ("%s: invalid handle type %d", G_GNUC_PRETTY_FUNCTION, type);
break;
}
}
gboolean
gimp_draw_tool_on_handle (GimpDrawTool *draw_tool,
GimpDisplay *gdisp,
gdouble x,
gdouble y,
GimpHandleType type,
gdouble handle_x,
gdouble handle_y,
gint width,
gint height,
GtkAnchorType anchor,
gboolean use_offsets)
{
gdouble tx, ty;
gdouble handle_tx, handle_ty;
g_return_val_if_fail (GIMP_IS_DRAW_TOOL (draw_tool), 0.0);
g_return_val_if_fail (GIMP_IS_DISPLAY (gdisp), 0.0);
gdisplay_transform_coords_f (gdisp, x, y, &tx, &ty, use_offsets);
gdisplay_transform_coords_f (gdisp,
handle_x, handle_y,
&handle_tx, &handle_ty,
use_offsets);
switch (type)
{
case GIMP_HANDLE_SQUARE:
case GIMP_HANDLE_FILLED_SQUARE:
case GIMP_HANDLE_CROSS:
gimp_draw_tool_shift_to_north_west (handle_tx, handle_ty,
width, height,
anchor,
&handle_tx, &handle_ty);
return (tx == CLAMP (tx, handle_tx, handle_tx + width) &&
ty == CLAMP (ty, handle_ty, handle_ty + height));
case GIMP_HANDLE_CIRCLE:
case GIMP_HANDLE_FILLED_CIRCLE:
gimp_draw_tool_shift_to_center (handle_tx, handle_ty,
width, height,
anchor,
&handle_tx, &handle_ty);
/* FIXME */
if (width != height)
width = (width + height) / 2;
width /= 2;
return ((SQR (handle_tx - tx) + SQR (handle_ty - ty)) < SQR (width));
default:
g_warning ("%s: invalid handle type %d", G_GNUC_PRETTY_FUNCTION, type);
break;
}
return FALSE;
}
void
gimp_draw_tool_draw_lines (GimpDrawTool *draw_tool,
gdouble *points,
gint npoints,
gint filled)
{
GimpTool *tool;
GimpDisplayShell *shell;
GdkPoint *coords;
gint i;
gdouble sx, sy;
tool = GIMP_TOOL (draw_tool);
shell = GIMP_DISPLAY_SHELL (tool->gdisp->shell);
coords = g_new (GdkPoint, npoints);
for (i = 0; i < npoints ; i++)
{
gdisplay_transform_coords_f (tool->gdisp, points[i*2], points[i*2+1],
&sx, &sy, TRUE);
coords[i].x = ROUND (sx);
coords[i].y = ROUND (sy);
}
if (filled)
{
gdk_draw_polygon (shell->canvas->window,
draw_tool->gc, TRUE,
coords, npoints);
}
else
{
gdk_draw_lines (shell->canvas->window,
draw_tool->gc,
coords, npoints);
}
g_free (coords);
}
/* private functions */
static inline void
gimp_draw_tool_shift_to_north_west (gdouble x,
gdouble y,
gint handle_width,
gint handle_height,
GtkAnchorType anchor,
gdouble *shifted_x,
gdouble *shifted_y)
{
switch (anchor)
{
case GTK_ANCHOR_CENTER:
x -= (handle_width >> 1);
y -= (handle_height >> 1);
break;
case GTK_ANCHOR_NORTH:
x -= (handle_width >> 1);
break;
case GTK_ANCHOR_NORTH_WEST:
/* nothing, this is the default */
break;
case GTK_ANCHOR_NORTH_EAST:
x -= handle_width;
break;
case GTK_ANCHOR_SOUTH:
x -= (handle_width >> 1);
y -= handle_height;
break;
case GTK_ANCHOR_SOUTH_WEST:
y -= handle_height;
break;
case GTK_ANCHOR_SOUTH_EAST:
x -= handle_width;
y -= handle_height;
break;
case GTK_ANCHOR_WEST:
y -= (handle_height >> 1);
break;
case GTK_ANCHOR_EAST:
x -= handle_width;
y -= (handle_height >> 1);
break;
default:
break;
}
if (shifted_x)
*shifted_x = x;
if (shifted_y)
*shifted_y = y;
}
static inline void
gimp_draw_tool_shift_to_center (gdouble x,
gdouble y,
gint handle_width,
gint handle_height,
GtkAnchorType anchor,
gdouble *shifted_x,
gdouble *shifted_y)
{
switch (anchor)
{
case GTK_ANCHOR_CENTER:
/* nothing, this is the default */
break;
case GTK_ANCHOR_NORTH:
y += (handle_height >> 1);
break;
case GTK_ANCHOR_NORTH_WEST:
x += (handle_width >> 1);
y += (handle_height >> 1);
break;
case GTK_ANCHOR_NORTH_EAST:
x -= (handle_width >> 1);
y += (handle_height >> 1);
break;
case GTK_ANCHOR_SOUTH:
y -= (handle_height >> 1);
break;
case GTK_ANCHOR_SOUTH_WEST:
x += (handle_width >> 1);
y -= (handle_height >> 1);
break;
case GTK_ANCHOR_SOUTH_EAST:
x -= (handle_width >> 1);
y -= (handle_height >> 1);
break;
case GTK_ANCHOR_WEST:
x += (handle_width >> 1);
break;
case GTK_ANCHOR_EAST:
x -= (handle_width >> 1);
break;
default:
break;
}
if (shifted_x)
*shifted_x = x;
if (shifted_y)
*shifted_y = y;
}
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