C++ GIMP_DRAW_TOOL函数代码示例

static void
gimp_source_tool_modifier_key (GimpTool        *tool,
                               GdkModifierType  key,
                               gboolean         press,
                               GdkModifierType  state,
                               GimpDisplay     *display)
{
  GimpSourceTool    *source_tool = GIMP_SOURCE_TOOL (tool);
  GimpPaintTool     *paint_tool  = GIMP_PAINT_TOOL (tool);
  GimpSourceOptions *options     = GIMP_SOURCE_TOOL_GET_OPTIONS (tool);

  if (options->use_source && key == GDK_CONTROL_MASK)
    {
      gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));

      if (press)
        {
          paint_tool->status = source_tool->status_set_source;

          source_tool->show_source_outline = FALSE;
        }
      else
        {
          paint_tool->status = source_tool->status_paint;

          source_tool->show_source_outline = TRUE;
        }

      gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
    }

  GIMP_TOOL_CLASS (parent_class)->modifier_key (tool, key, press, state,
                                                display);
}

static void
gimp_color_tool_motion (GimpTool         *tool,
                        const GimpCoords *coords,
                        guint32           time,
                        GdkModifierType   state,
                        GimpDisplay      *display)
{
  GimpColorTool *color_tool = GIMP_COLOR_TOOL (tool);

  if (! color_tool->enabled)
    return;

  if (! color_tool->sample_point)
    {
      gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));

      color_tool->center_x = coords->x;
      color_tool->center_y = coords->y;

      gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));

      gimp_color_tool_pick (color_tool, GIMP_COLOR_PICK_STATE_UPDATE,
                            coords->x, coords->y);
    }
}

static void
gimp_warp_tool_start (GimpWarpTool *wt,
                      GimpDisplay  *display)
{
  GimpTool      *tool     = GIMP_TOOL (wt);
  GimpImage     *image    = gimp_display_get_image (display);
  GimpDrawable  *drawable = gimp_image_get_active_drawable (image);
  const Babl    *format;
  GeglRectangle  bbox;

  tool->display  = display;
  tool->drawable = drawable;

  /* Create the coords buffer, with the size of the selection */
  format = babl_format_n (babl_type ("float"), 2);

  gimp_item_mask_intersect (GIMP_ITEM (drawable), &bbox.x, &bbox.y,
                            &bbox.width, &bbox.height);

#ifdef WARP_DEBUG
  g_printerr ("Initialize coordinate buffer (%d,%d) at %d,%d\n",
              bbox.width, bbox.height, bbox.x, bbox.y);
#endif

  wt->coords_buffer = gegl_buffer_new (&bbox, format);

  gimp_warp_tool_create_image_map (wt, drawable);

  if (! gimp_draw_tool_is_active (GIMP_DRAW_TOOL (wt)))
    gimp_draw_tool_start (GIMP_DRAW_TOOL (wt), display);
}

static void
gimp_text_tool_select_all (GimpTextTool *text_tool,
                           gboolean      select)
{
  GtkTextBuffer *buffer = GTK_TEXT_BUFFER (text_tool->buffer);

  gimp_draw_tool_pause (GIMP_DRAW_TOOL (text_tool));

  if (select)
    {
      GtkTextIter start, end;

      gtk_text_buffer_get_bounds (buffer, &start, &end);
      gtk_text_buffer_select_range (buffer, &start, &end);
    }
  else
    {
      GtkTextIter cursor;

      gtk_text_buffer_get_iter_at_mark (buffer, &cursor,
					gtk_text_buffer_get_insert (buffer));
      gtk_text_buffer_move_mark_by_name (buffer, "selection_bound", &cursor);
    }

  gimp_draw_tool_resume (GIMP_DRAW_TOOL (text_tool));
}

static void
gimp_cage_tool_motion (GimpTool         *tool,
                       const GimpCoords *coords,
                       guint32           time,
                       GdkModifierType   state,
                       GimpDisplay      *display)
{
  GimpCageTool    *ct       = GIMP_CAGE_TOOL (tool);
  GimpCageOptions *options  = GIMP_CAGE_TOOL_GET_OPTIONS (ct);

  gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));

  ct->cursor_x = coords->x;
  ct->cursor_y = coords->y;

  switch (ct->tool_state)
    {
    case CAGE_STATE_MOVE_HANDLE:
    case CAGE_STATE_CLOSING:
    case DEFORM_STATE_MOVE_HANDLE:
      gimp_cage_config_add_displacement (ct->config,
                                         options->cage_mode,
                                         ct->cursor_x - ct->movement_start_x,
                                         ct->cursor_y - ct->movement_start_y);
      break;
    }

  gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}

static void
gimp_source_tool_button_press (GimpTool        *tool,
                               GimpCoords      *coords,
                               guint32          time,
                               GdkModifierType  state,
                               GimpDisplay     *display)
{
  GimpPaintTool  *paint_tool  = GIMP_PAINT_TOOL (tool);
  GimpSourceTool *source_tool = GIMP_SOURCE_TOOL (tool);
  GimpSourceCore *source      = GIMP_SOURCE_CORE (paint_tool->core);

  gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));

  if ((state & (GDK_CONTROL_MASK | GDK_SHIFT_MASK)) == GDK_CONTROL_MASK)
    {
      source->set_source = TRUE;

      source_tool->src_display = display;
    }
  else
    {
      source->set_source = FALSE;
    }

  GIMP_TOOL_CLASS (parent_class)->button_press (tool, coords, time, state,
                                                display);

  source_tool->src_x = source->src_x;
  source_tool->src_y = source->src_y;

  gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}

static void
gimp_align_tool_button_press (GimpTool            *tool,
                              const GimpCoords    *coords,
                              guint32              time,
                              GdkModifierType      state,
                              GimpButtonPressType  press_type,
                              GimpDisplay         *display)
{
    GimpAlignTool *align_tool  = GIMP_ALIGN_TOOL (tool);

    gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));

    /*  If the tool was being used in another image... reset it  */
    if (display != tool->display)
        gimp_tool_control (tool, GIMP_TOOL_ACTION_HALT, display);

    tool->display = display;

    gimp_tool_control_activate (tool->control);

    align_tool->x2 = align_tool->x1 = coords->x;
    align_tool->y2 = align_tool->y1 = coords->y;

    if (! gimp_draw_tool_is_active (GIMP_DRAW_TOOL (tool)))
        gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), display);

    gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}

static void
gimp_move_tool_start_guide (GimpMoveTool        *move,
                            GimpDisplay         *display,
                            GimpOrientationType  orientation)
{
  GimpTool *tool = GIMP_TOOL (move);

  gimp_display_shell_selection_pause (gimp_display_get_shell (display));

  tool->display = display;
  gimp_tool_control_activate (tool->control);
  gimp_tool_control_set_scroll_lock (tool->control, TRUE);

  if (gimp_draw_tool_is_active  (GIMP_DRAW_TOOL (tool)))
    gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));

  move->guide             = NULL;
  move->moving_guide      = TRUE;
  move->guide_position    = GUIDE_POSITION_INVALID;
  move->guide_orientation = orientation;

  gimp_tool_set_cursor (tool, display,
                        GIMP_CURSOR_MOUSE,
                        GIMP_TOOL_CURSOR_HAND,
                        GIMP_CURSOR_MODIFIER_MOVE);

  gimp_draw_tool_start (GIMP_DRAW_TOOL (move), display);
}

static void
gimp_source_tool_button_press (GimpTool            *tool,
                               const GimpCoords    *coords,
                               guint32              time,
                               GdkModifierType      state,
                               GimpButtonPressType  press_type,
                               GimpDisplay         *display)
{
  GimpPaintTool  *paint_tool  = GIMP_PAINT_TOOL (tool);
  GimpSourceTool *source_tool = GIMP_SOURCE_TOOL (tool);
  GimpSourceCore *source      = GIMP_SOURCE_CORE (paint_tool->core);
  GdkModifierType toggle_mask = gimp_get_toggle_behavior_mask ();

  gimp_draw_tool_pause (GIMP_DRAW_TOOL (tool));

  if ((state & (toggle_mask | GDK_SHIFT_MASK)) == toggle_mask)
    {
      source->set_source = TRUE;

      gimp_source_tool_set_src_display (source_tool, display);
    }
  else
    {
      source->set_source = FALSE;
    }

  GIMP_TOOL_CLASS (parent_class)->button_press (tool, coords, time, state,
                                                press_type, display);

  source_tool->src_x = source->src_x;
  source_tool->src_y = source->src_y;

  gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));
}

void
gimp_color_tool_start_sample_point (GimpTool    *tool,
                                    GimpDisplay *display)
{
  GimpColorTool *color_tool;

  g_return_if_fail (GIMP_IS_COLOR_TOOL (tool));
  g_return_if_fail (GIMP_IS_DISPLAY (display));

  color_tool = GIMP_COLOR_TOOL (tool);

  gimp_display_shell_selection_pause (gimp_display_get_shell (display));

  tool->display = display;
  gimp_tool_control_activate (tool->control);
  gimp_tool_control_set_scroll_lock (tool->control, TRUE);

  if (gimp_draw_tool_is_active (GIMP_DRAW_TOOL (tool)))
    gimp_draw_tool_stop (GIMP_DRAW_TOOL (tool));

  color_tool->sample_point        = NULL;
  color_tool->moving_sample_point = TRUE;
  color_tool->sample_point_x      = SAMPLE_POINT_POSITION_INVALID;
  color_tool->sample_point_y      = SAMPLE_POINT_POSITION_INVALID;

  gimp_tool_set_cursor (tool, display,
                        GIMP_CURSOR_MOUSE,
                        GIMP_TOOL_CURSOR_COLOR_PICKER,
                        GIMP_CURSOR_MODIFIER_MOVE);

  gimp_draw_tool_start (GIMP_DRAW_TOOL (tool), display);
}

static void
gimp_text_tool_toggle_overwrite (GimpTextTool *text_tool)
{
  gimp_draw_tool_pause (GIMP_DRAW_TOOL (text_tool));

  text_tool->overwrite_mode = ! text_tool->overwrite_mode;

  gimp_draw_tool_resume (GIMP_DRAW_TOOL (text_tool));
}

static void
gimp_blend_tool_button_press (GimpTool            *tool,
                              const GimpCoords    *coords,
                              guint32              time,
                              GdkModifierType      state,
                              GimpButtonPressType  press_type,
                              GimpDisplay         *display)
{
  GimpBlendTool *blend_tool = GIMP_BLEND_TOOL (tool);

  if (tool->display && display != tool->display)
    {
      gimp_tool_pop_status (tool, tool->display);
      gimp_blend_tool_halt (blend_tool);
    }

  blend_tool->grabbed_point = gimp_blend_tool_get_point_under_cursor (blend_tool);

  if (blend_tool->grabbed_point == POINT_NONE &&
      ! gimp_draw_tool_is_active (GIMP_DRAW_TOOL (tool)))
    {
      blend_tool->start_x = coords->x;
      blend_tool->start_y = coords->y;

      if (gimp_blend_tool_is_shapeburst (blend_tool))
        {
          blend_tool->grabbed_point = POINT_FILL_MODE;
        }
      else
        {
          blend_tool->grabbed_point = POINT_INIT_MODE;
        }
    }
  else if ((state & GDK_MOD1_MASK) &&
           gimp_draw_tool_is_active (GIMP_DRAW_TOOL (tool)))
    {
      blend_tool->grabbed_point = POINT_BOTH;
    }

  gimp_blend_tool_point_motion (blend_tool,
                                state & gimp_get_constrain_behavior_mask ());

  tool->display = display;
  gimp_blend_tool_update_items (blend_tool);

  if (blend_tool->grabbed_point != POINT_FILL_MODE &&
      blend_tool->grabbed_point != POINT_INIT_MODE)
    {
      gimp_blend_tool_update_graph (blend_tool);
      gimp_drawable_filter_apply (blend_tool->filter, NULL);
    }

  gimp_tool_control_activate (tool->control);

  gimp_blend_tool_push_status (blend_tool, state, display);
}

static void
gimp_cage_tool_remove_last_handle (GimpCageTool *ct)
{
  GimpCageConfig *config = ct->config;

  gimp_draw_tool_pause (GIMP_DRAW_TOOL (ct));

  gimp_cage_config_remove_last_cage_point (config);

  gimp_draw_tool_resume (GIMP_DRAW_TOOL (ct));
}

void
gimp_warp_tool_button_release (GimpTool              *tool,
                               const GimpCoords      *coords,
                               guint32                time,
                               GdkModifierType        state,
                               GimpButtonReleaseType  release_type,
                               GimpDisplay           *display)
{
  GimpWarpTool *wt = GIMP_WARP_TOOL (tool);

  gimp_draw_tool_pause (GIMP_DRAW_TOOL (wt));

  gimp_tool_control_halt (tool->control);

  g_source_remove (wt->stroke_timer);
  wt->stroke_timer = 0;

  g_signal_handlers_disconnect_by_func (wt->current_stroke,
                                        gimp_warp_tool_stroke_changed,
                                        wt);

#ifdef WARP_DEBUG
  g_printerr ("%s\n", gegl_path_to_string (wt->current_stroke));
#endif

  g_object_unref (wt->current_stroke);
  wt->current_stroke = NULL;

  if (release_type == GIMP_BUTTON_RELEASE_CANCEL)
    {
      gimp_warp_tool_undo (tool, display);

      /*  the just undone stroke has no business on the redo stack  */
      g_object_unref (wt->redo_stack->data);
      wt->redo_stack = g_list_remove_link (wt->redo_stack, wt->redo_stack);
    }
  else
    {
      if (wt->redo_stack)
        {
          /*  the redo stack becomes invalid by actually doing a stroke  */
          g_list_free_full (wt->redo_stack, (GDestroyNotify) g_object_unref);
          wt->redo_stack = NULL;
        }

      gimp_tool_push_status (tool, tool->display,
                             _("Press ENTER to commit the transform"));
    }

  gimp_draw_tool_resume (GIMP_DRAW_TOOL (tool));

  /*  update the undo actions / menu items  */
  gimp_image_flush (gimp_display_get_image (GIMP_TOOL (wt)->display));
}

static void
gimp_align_tool_clear_selected (GimpAlignTool *align_tool)
{
    gimp_draw_tool_pause (GIMP_DRAW_TOOL (align_tool));

    while (align_tool->selected_objects)
        gimp_align_tool_object_removed (align_tool->selected_objects->data,
                                        align_tool);

    gimp_draw_tool_resume (GIMP_DRAW_TOOL (align_tool));
}