mirror of
https://gitlab.gnome.org/GNOME/gimp
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319 lines
7.1 KiB
C
319 lines
7.1 KiB
C
/* The GIMP -- an image manipulation program
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* Copyright (C) 1995-2001 Spencer Kimball, Peter Mattis, and others
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include "config.h"
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#include <gtk/gtk.h>
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#include "libgimpmath/gimpmath.h"
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#include "tools-types.h"
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#include "display/gimpdisplay.h"
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#include "display/gimpdisplayshell.h"
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#include "gimpdrawtool.h"
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enum
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{
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DRAW,
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LAST_SIGNAL
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};
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static void gimp_draw_tool_class_init (GimpDrawToolClass *klass);
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static void gimp_draw_tool_init (GimpDrawTool *draw_tool);
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static void gimp_draw_tool_finalize (GObject *object);
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static void gimp_draw_tool_control (GimpTool *tool,
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ToolAction action,
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GimpDisplay *gdisp);
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static guint gimp_draw_tool_signals[LAST_SIGNAL] = { 0 };
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static GimpToolClass *parent_class = NULL;
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GType
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gimp_draw_tool_get_type (void)
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{
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static GType tool_type = 0;
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if (! tool_type)
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{
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static const GTypeInfo tool_info =
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{
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sizeof (GimpDrawToolClass),
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(GBaseInitFunc) NULL,
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(GBaseFinalizeFunc) NULL,
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(GClassInitFunc) gimp_draw_tool_class_init,
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NULL, /* class_finalize */
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NULL, /* class_data */
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sizeof (GimpDrawTool),
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0, /* n_preallocs */
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(GInstanceInitFunc) gimp_draw_tool_init,
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};
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tool_type = g_type_register_static (GIMP_TYPE_TOOL,
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"GimpDrawTool",
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&tool_info, 0);
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}
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return tool_type;
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}
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static void
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gimp_draw_tool_class_init (GimpDrawToolClass *klass)
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{
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GObjectClass *object_class;
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GimpToolClass *tool_class;
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object_class = G_OBJECT_CLASS (klass);
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tool_class = GIMP_TOOL_CLASS (klass);
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parent_class = g_type_class_peek_parent (klass);
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gimp_draw_tool_signals[DRAW] =
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g_signal_new ("draw",
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G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_FIRST,
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G_STRUCT_OFFSET (GimpDrawToolClass, draw),
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NULL, NULL,
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g_cclosure_marshal_VOID__VOID,
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G_TYPE_NONE, 0);
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object_class->finalize = gimp_draw_tool_finalize;
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tool_class->control = gimp_draw_tool_control;
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}
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static void
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gimp_draw_tool_init (GimpDrawTool *tool)
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{
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tool->draw_state = INVISIBLE;
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tool->gc = NULL;
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tool->paused_count = 0;
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tool->line_width = 0;
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tool->line_style = GDK_LINE_SOLID;
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tool->cap_style = GDK_CAP_NOT_LAST;
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tool->join_style = GDK_JOIN_MITER;
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}
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static void
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gimp_draw_tool_finalize (GObject *object)
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{
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GimpDrawTool *draw_tool;
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draw_tool = GIMP_DRAW_TOOL (object);
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if (draw_tool->gc)
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{
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g_object_unref (G_OBJECT (draw_tool->gc));
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draw_tool->gc = NULL;
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}
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gimp_draw_tool_control (GimpTool *tool,
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ToolAction action,
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GimpDisplay *gdisp)
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{
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GimpDrawTool *draw_tool;
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draw_tool = GIMP_DRAW_TOOL (tool);
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switch (action)
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{
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case PAUSE:
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gimp_draw_tool_pause (draw_tool);
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break;
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case RESUME:
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gimp_draw_tool_resume (draw_tool);
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break;
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case HALT:
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gimp_draw_tool_stop (draw_tool);
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break;
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default:
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break;
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}
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if (GIMP_TOOL_CLASS (parent_class)->control)
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GIMP_TOOL_CLASS (parent_class)->control (tool, action, gdisp);
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}
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void
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gimp_draw_tool_start (GimpDrawTool *core,
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GdkWindow *win)
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{
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GdkColor fg, bg;
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if (core->draw_state != INVISIBLE)
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gimp_draw_tool_stop (core); /* this seems backwards ;) */
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core->win = win;
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core->paused_count = 0; /* reset pause counter to 0 */
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/* create a new graphics context */
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if (! core->gc)
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core->gc = gdk_gc_new (win);
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gdk_gc_set_function (core->gc, GDK_INVERT);
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fg.pixel = 0xFFFFFFFF;
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bg.pixel = 0x00000000;
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gdk_gc_set_foreground (core->gc, &fg);
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gdk_gc_set_background (core->gc, &bg);
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gdk_gc_set_line_attributes (core->gc, core->line_width, core->line_style,
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core->cap_style, core->join_style);
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g_signal_emit (G_OBJECT(core), gimp_draw_tool_signals[DRAW], 0);
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core->draw_state = VISIBLE;
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}
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void
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gimp_draw_tool_stop (GimpDrawTool *core)
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{
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if (core->draw_state == INVISIBLE)
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return;
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g_signal_emit (G_OBJECT(core), gimp_draw_tool_signals[DRAW], 0);
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core->draw_state = INVISIBLE;
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}
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void
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gimp_draw_tool_resume (GimpDrawTool *core)
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{
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core->paused_count = (core->paused_count > 0) ? core->paused_count - 1 : 0;
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if (core->paused_count == 0)
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{
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core->draw_state = VISIBLE;
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g_signal_emit(G_OBJECT(core), gimp_draw_tool_signals[DRAW], 0);
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}
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}
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void
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gimp_draw_tool_pause (GimpDrawTool *core)
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{
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if (core->paused_count == 0)
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{
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core->draw_state = INVISIBLE;
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g_signal_emit (G_OBJECT(core), gimp_draw_tool_signals[DRAW], 0);
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}
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core->paused_count++;
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}
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void
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gimp_draw_tool_draw_handle (GimpDrawTool *draw_tool,
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gdouble x,
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gdouble y,
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gint size,
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gint type)
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{
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GimpTool *tool;
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GimpDisplayShell *shell;
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gdouble hx, hy;
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gint filled;
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tool = GIMP_TOOL (draw_tool);
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shell = GIMP_DISPLAY_SHELL (tool->gdisp->shell);
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gdisplay_transform_coords_f (tool->gdisp, x, y, &hx, &hy, TRUE);
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hx = ROUND (hx);
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hy = ROUND (hy);
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filled = type % 2;
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if (type < 2)
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{
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gdk_draw_rectangle (shell->canvas->window,
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draw_tool->gc, filled,
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hx - size / 2, hy - size / 2,
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size, size);
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}
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else
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{
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gdk_draw_arc (shell->canvas->window,
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draw_tool->gc, filled,
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hx - size / 2, hy - size / 2,
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size, size,
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0, 360 * 64);
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}
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}
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void
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gimp_draw_tool_draw_lines (GimpDrawTool *draw_tool,
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gdouble *points,
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gint npoints,
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gint filled)
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{
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GimpTool *tool;
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GimpDisplayShell *shell;
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GdkPoint *coords;
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gint i;
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gdouble sx, sy;
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tool = GIMP_TOOL (draw_tool);
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shell = GIMP_DISPLAY_SHELL (tool->gdisp->shell);
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coords = g_new (GdkPoint, npoints);
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for (i = 0; i < npoints ; i++)
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{
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gdisplay_transform_coords_f (tool->gdisp, points[i*2], points[i*2+1],
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&sx, &sy, TRUE);
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coords[i].x = ROUND (sx);
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coords[i].y = ROUND (sy);
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}
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if (filled)
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{
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gdk_draw_polygon (shell->canvas->window,
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draw_tool->gc, TRUE,
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coords, npoints);
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}
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else
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{
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gdk_draw_lines (shell->canvas->window,
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draw_tool->gc,
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coords, npoints);
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}
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g_free (coords);
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}
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