+++ /dev/null
-/*
- * view-object.c
- * Copyright (C) 2001-2009 Jim Evins <evins@snaught.com>.
- *
- * This file is part of gLabels.
- *
- * gLabels 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.
- *
- * gLabels 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 gLabels. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include "view-object.h"
-
-#include <glib.h>
-
-#include "debug.h"
-
-
-/*========================================================*/
-/* Private constants and macros. */
-/*========================================================*/
-
-#define HANDLE_FILL_RGBA_ARGS 0.0, 0.75, 0.0, 0.4
-#define HANDLE_OUTLINE_RGBA_ARGS 0.0, 0.0, 0.0, 0.8
-
-#define HANDLE_OUTLINE_WIDTH_PIXELS 1.0
-#define HANDLE_PIXELS 7
-
-
-/*========================================================*/
-/* Private types. */
-/*========================================================*/
-
-struct _glViewObjectPrivate {
-
- glLabelObject *object;
-
- glView *view;
- glViewObjectHandlesStyle handles_style;
-
- GtkWidget *property_editor;
-};
-
-
-/*========================================================*/
-/* Private globals. */
-/*========================================================*/
-
-
-/*========================================================*/
-/* Private function prototypes. */
-/*========================================================*/
-
-static void gl_view_object_finalize (GObject *object);
-
-static void object_removed_cb (glViewObject *view_object,
- glLabelObject *object);
-
-static void object_top_cb (glViewObject *view_object,
- glLabelObject *object);
-
-static void object_bottom_cb (glViewObject *view_object,
- glLabelObject *object);
-
-
-/*****************************************************************************/
-/* Boilerplate object stuff. */
-/*****************************************************************************/
-G_DEFINE_TYPE (glViewObject, gl_view_object, G_TYPE_OBJECT);
-
-
-static void
-gl_view_object_class_init (glViewObjectClass *class)
-{
- GObjectClass *object_class = G_OBJECT_CLASS (class);
-
- gl_debug (DEBUG_VIEW, "START");
-
- gl_view_object_parent_class = g_type_class_peek_parent (class);
-
- object_class->finalize = gl_view_object_finalize;
-
- gl_debug (DEBUG_VIEW, "END");
-}
-
-
-static void
-gl_view_object_init (glViewObject *view_object)
-{
- gl_debug (DEBUG_VIEW, "START");
-
- view_object->priv = g_new0 (glViewObjectPrivate, 1);
-
- gl_debug (DEBUG_VIEW, "END");
-}
-
-
-static void
-gl_view_object_finalize (GObject *object)
-{
- glViewObject *view_object = GL_VIEW_OBJECT (object);
- glView *view;
-
- gl_debug (DEBUG_VIEW, "START");
-
- g_return_if_fail (object && GL_IS_VIEW_OBJECT (object));
-
- view = view_object->priv->view;
- view->object_list = g_list_remove (view->object_list, object);
- view->selected_object_list =
- g_list_remove (view->selected_object_list, object);
-
- g_object_unref (view_object->priv->object);
- if (view_object->priv->property_editor) {
- gl_debug (DEBUG_VIEW, "Destroy editor");
- g_object_unref (G_OBJECT(view_object->priv->property_editor));
- }
- g_free (view_object->priv);
-
- G_OBJECT_CLASS (gl_view_object_parent_class)->finalize (object);
-
- gl_debug (DEBUG_VIEW, "END");
-}
-
-
-/*****************************************************************************/
-/* NEW object view. */
-/*****************************************************************************/
-GObject *
-gl_view_object_new (void)
-{
- glViewObject *view_object;
-
- gl_debug (DEBUG_VIEW, "START");
-
- view_object = g_object_new (gl_view_object_get_type(), NULL);
-
- gl_debug (DEBUG_VIEW, "END");
-
- return G_OBJECT (view_object);
-}
-
-
-/*****************************************************************************/
-/* Set parent view to which this object view belongs. */
-/*****************************************************************************/
-void
-gl_view_object_set_view (glViewObject *view_object,
- glView *view)
-{
- gl_debug (DEBUG_VIEW, "START");
-
- g_return_if_fail (view_object && GL_IS_VIEW_OBJECT (view_object));
- g_return_if_fail (view && GL_IS_VIEW (view));
-
- view_object->priv->view = view;
-
- view->object_list = g_list_append (view->object_list, view_object);
-
- g_signal_connect_swapped (G_OBJECT (view_object->priv->object), "changed",
- G_CALLBACK (gl_view_update), view);
- g_signal_connect_swapped (G_OBJECT (view_object->priv->object), "moved",
- G_CALLBACK (gl_view_update), view);
-
- gl_debug (DEBUG_VIEW, "END");
-}
-
-
-/*****************************************************************************/
-/* Set Label object to follow. */
-/*****************************************************************************/
-void
-gl_view_object_set_object (glViewObject *view_object,
- glLabelObject *object,
- glViewObjectHandlesStyle style)
-{
- gl_debug (DEBUG_VIEW, "START");
-
- g_return_if_fail (view_object && GL_IS_VIEW_OBJECT (view_object));
- g_return_if_fail (object && GL_IS_LABEL_OBJECT (object));
-
- view_object->priv->object = g_object_ref (G_OBJECT (object));
- view_object->priv->handles_style = style;
-
- g_signal_connect_swapped (G_OBJECT (object), "removed",
- G_CALLBACK (object_removed_cb), view_object);
- g_signal_connect_swapped (G_OBJECT (object), "top",
- G_CALLBACK (object_top_cb), view_object);
- g_signal_connect_swapped (G_OBJECT (object), "bottom",
- G_CALLBACK (object_bottom_cb), view_object);
-
- gl_debug (DEBUG_VIEW, "END");
-}
-
-
-/*---------------------------------------------------------------------------*/
-/* PRIVATE. Handle object "removed" signal. */
-/*---------------------------------------------------------------------------*/
-static void
-object_removed_cb (glViewObject *view_object,
- glLabelObject *object)
-{
- glView *view;
- gl_debug (DEBUG_VIEW, "START");
-
- g_return_if_fail (view_object && GL_IS_VIEW_OBJECT (view_object));
- g_return_if_fail (object && GL_IS_LABEL_OBJECT (object));
-
- view = gl_view_object_get_view (view_object);
- view->object_list = g_list_remove (view->object_list, view_object);
- g_object_unref (G_OBJECT (view_object));
-
- gl_debug (DEBUG_VIEW, "END");
-}
-
-
-/*---------------------------------------------------------------------------*/
-/* PRIVATE. Handle object "top" signal. */
-/*---------------------------------------------------------------------------*/
-static void
-object_top_cb (glViewObject *view_object,
- glLabelObject *object)
-{
- glView *view;
- gl_debug (DEBUG_VIEW, "START");
-
- g_return_if_fail (view_object && GL_IS_VIEW_OBJECT (view_object));
- g_return_if_fail (object && GL_IS_LABEL_OBJECT (object));
-
- view = gl_view_object_get_view (view_object);
-
- /* Move to end of list, representing front most object */
- view->object_list = g_list_remove (view->object_list, view_object);
- view->object_list = g_list_append (view->object_list, view_object);
-
- gl_debug (DEBUG_VIEW, "END");
-}
-
-
-/*---------------------------------------------------------------------------*/
-/* PRIVATE. Handle object "removed" signal. */
-/*---------------------------------------------------------------------------*/
-static void
-object_bottom_cb (glViewObject *view_object,
- glLabelObject *object)
-{
- glView *view;
- gl_debug (DEBUG_VIEW, "START");
-
- g_return_if_fail (view_object && GL_IS_VIEW_OBJECT (view_object));
- g_return_if_fail (object && GL_IS_LABEL_OBJECT (object));
-
- view = gl_view_object_get_view (view_object);
-
- /* Move to front of list, representing rear most object */
- view->object_list = g_list_remove (view->object_list, view_object);
- view->object_list = g_list_prepend (view->object_list, view_object);
-
- gl_debug (DEBUG_VIEW, "END");
-}
-
-
-/*****************************************************************************/
-/* Return parent view associated with this view. */
-/*****************************************************************************/
-glView *
-gl_view_object_get_view (glViewObject *view_object)
-{
- gl_debug (DEBUG_VIEW, "START");
-
- g_return_val_if_fail (view_object && GL_IS_VIEW_OBJECT (view_object), NULL);
-
- gl_debug (DEBUG_VIEW, "END");
-
- return view_object->priv->view;
-}
-
-
-/*****************************************************************************/
-/* Return label object that we are following. */
-/*****************************************************************************/
-glLabelObject *
-gl_view_object_get_object (glViewObject *view_object)
-{
- gl_debug (DEBUG_VIEW, "START");
-
- g_return_val_if_fail (view_object && GL_IS_VIEW_OBJECT (view_object), NULL);
-
- gl_debug (DEBUG_VIEW, "END");
-
- return view_object->priv->object;
-}
-
-
-/*****************************************************************************/
-/* Get property editor. */
-/*****************************************************************************/
-GtkWidget *
-gl_view_object_get_editor (glViewObject *view_object)
-{
- gl_debug (DEBUG_VIEW, "START");
-
- g_return_val_if_fail (view_object && GL_IS_VIEW_OBJECT (view_object), NULL);
-
- if ( GL_VIEW_OBJECT_GET_CLASS(view_object)->construct_editor != NULL ) {
-
- if (view_object->priv->property_editor == NULL) {
- view_object->priv->property_editor =
- GL_VIEW_OBJECT_GET_CLASS(view_object)->construct_editor (view_object);
- }
- g_signal_connect (G_OBJECT (view_object->priv->property_editor),
- "destroy",
- G_CALLBACK (gtk_widget_destroyed),
- &view_object->priv->property_editor);
-
- gtk_widget_show (view_object->priv->property_editor);
-
- }
-
-
- gl_debug (DEBUG_VIEW, "END");
-
- return view_object->priv->property_editor;
-}
-
-
-/*****************************************************************************/
-/* Select object. */
-/*****************************************************************************/
-void
-gl_view_object_select (glViewObject *view_object)
-{
- gl_debug (DEBUG_VIEW, "START");
-
- gl_view_select_object(view_object->priv->view, view_object);
-
- gl_debug (DEBUG_VIEW, "END");
-}
-
-
-/*****************************************************************************/
-/* Is object at (x,y)? */
-/*****************************************************************************/
-gboolean
-gl_view_object_at (glViewObject *view_object,
- cairo_t *cr,
- gdouble x,
- gdouble y)
-{
- glLabelObject *object = view_object->priv->object;
- gdouble x0, y0;
- cairo_matrix_t matrix;
- gboolean return_val = FALSE;
-
- gl_debug (DEBUG_VIEW, "START");
-
- g_return_val_if_fail (view_object && GL_IS_VIEW_OBJECT (view_object), FALSE);
- g_return_val_if_fail (object && GL_IS_LABEL_OBJECT (object), FALSE);
-
- gl_label_object_get_position (object, &x0, &y0);
- gl_label_object_get_matrix (object, &matrix);
-
- cairo_save (cr);
- cairo_translate (cr, x0, y0);
- cairo_transform (cr, &matrix);
-
- cairo_device_to_user (cr, &x, &y);
-
- if ( GL_VIEW_OBJECT_GET_CLASS(view_object)->object_at != NULL ) {
-
- return_val = GL_VIEW_OBJECT_GET_CLASS(view_object)->object_at (view_object, cr, x, y);
-
- }
-
- cairo_restore (cr);
-
- return return_val;
-
- gl_debug (DEBUG_VIEW, "END");
-}
-
-
-/*--------------------------------------------------------------------------*/
-/* Create handle path */
-/*--------------------------------------------------------------------------*/
-static void
-create_handle_path (cairo_t *cr,
- glLabelObject *object,
- gdouble scale,
- gdouble x_handle,
- gdouble y_handle)
-{
- gl_debug (DEBUG_VIEW, "START");
-
- cairo_rectangle (cr,
- x_handle - HANDLE_PIXELS/scale/2, y_handle - HANDLE_PIXELS/scale/2,
- HANDLE_PIXELS/scale, HANDLE_PIXELS/scale);
-
- gl_debug (DEBUG_VIEW, "END");
-}
-
-
-/*****************************************************************************/
-/* Draw object handles */
-/*****************************************************************************/
-void
-gl_view_object_draw_handles (glViewObject *view_object,
- cairo_t *cr)
-{
- glLabelObject *object = view_object->priv->object;
- gdouble x0, y0;
- cairo_matrix_t matrix;
- gdouble scale;
- gdouble w, h;
-
- gl_debug (DEBUG_VIEW, "START");
-
- g_return_if_fail (view_object && GL_IS_VIEW_OBJECT (view_object));
- g_return_if_fail (object && GL_IS_LABEL_OBJECT (object));
-
- scale = view_object->priv->view->home_scale * view_object->priv->view->zoom;
-
- gl_label_object_get_position (object, &x0, &y0);
- gl_label_object_get_matrix (object, &matrix);
-
- gl_label_object_get_size (GL_LABEL_OBJECT(object), &w, &h);
-
- cairo_save (cr);
-
- cairo_translate (cr, x0, y0);
- cairo_transform (cr, &matrix);
-
- switch (view_object->priv->handles_style)
- {
- case GL_VIEW_OBJECT_HANDLES_BOX:
-
- /* North */
- cairo_new_path (cr);
- create_handle_path (cr, object, scale, w/2, 0);
-
- /* North East */
- cairo_new_sub_path (cr);
- create_handle_path (cr, object, scale, w, 0);
-
- /* East */
- cairo_new_sub_path (cr);
- create_handle_path (cr, object, scale, w, h/2);
-
- /* South East */
- cairo_new_sub_path (cr);
- create_handle_path (cr, object, scale, w, h);
-
- /* South */
- cairo_new_sub_path (cr);
- create_handle_path (cr, object, scale, w/2, h);
-
- /* South West */
- cairo_new_sub_path (cr);
- create_handle_path (cr, object, scale, 0, h);
-
- /* West */
- cairo_new_sub_path (cr);
- create_handle_path (cr, object, scale, 0, h/2);
-
- /* North West */
- cairo_new_sub_path (cr);
- create_handle_path (cr, object, scale, 0, 0);
-
- break;
-
- case GL_VIEW_OBJECT_HANDLES_LINE:
- /* P1 */
- cairo_new_path (cr);
- create_handle_path (cr, object, scale, 0, 0);
-
- /* P2 */
- cairo_new_sub_path (cr);
- create_handle_path (cr, object, scale, w, h);
-
- break;
- }
-
- cairo_set_source_rgba (cr, HANDLE_FILL_RGBA_ARGS);
- cairo_fill_preserve (cr);
-
- cairo_set_line_width (cr, HANDLE_OUTLINE_WIDTH_PIXELS/scale);
- cairo_set_source_rgba (cr, HANDLE_OUTLINE_RGBA_ARGS);
- cairo_stroke (cr);
-
- cairo_restore (cr);
-
- gl_debug (DEBUG_VIEW, "END");
-}
-
-
-/*****************************************************************************/
-/* Is there an object handle at (x,y). */
-/*****************************************************************************/
-glViewObjectHandle
-gl_view_object_handle_at (glViewObject *view_object,
- cairo_t *cr,
- gdouble x,
- gdouble y)
-{
- glLabelObject *object = view_object->priv->object;
- gdouble x0, y0;
- cairo_matrix_t matrix;
- gdouble scale;
- gdouble w, h;
- glViewObjectHandle handle = GL_VIEW_OBJECT_HANDLE_NONE;
-
- gl_debug (DEBUG_VIEW, "START");
-
- g_return_val_if_fail (view_object && GL_IS_VIEW_OBJECT (view_object), handle);
- g_return_val_if_fail (object && GL_IS_LABEL_OBJECT (object), handle);
-
- scale = view_object->priv->view->home_scale * view_object->priv->view->zoom;
-
- gl_label_object_get_position (object, &x0, &y0);
- gl_label_object_get_matrix (object, &matrix);
-
- gl_label_object_get_size (GL_LABEL_OBJECT(object), &w, &h);
-
- cairo_save (cr);
-
- cairo_translate (cr, x0, y0);
- cairo_transform (cr, &matrix);
-
- cairo_device_to_user (cr, &x, &y);
-
- switch (view_object->priv->handles_style)
- {
- case GL_VIEW_OBJECT_HANDLES_BOX:
-
- /* South East */
- create_handle_path (cr, object, scale, w, h);
- if (cairo_in_fill (cr, x, y)) {handle = GL_VIEW_OBJECT_HANDLE_SE; break;}
-
- /* South West */
- create_handle_path (cr, object, scale, 0, h);
- if (cairo_in_fill (cr, x, y)) {handle = GL_VIEW_OBJECT_HANDLE_SW; break;}
-
- /* North East */
- create_handle_path (cr, object, scale, w, 0);
- if (cairo_in_fill (cr, x, y)) {handle = GL_VIEW_OBJECT_HANDLE_NE; break;}
-
- /* North West */
- create_handle_path (cr, object, scale, 0, 0);
- if (cairo_in_fill (cr, x, y)) {handle = GL_VIEW_OBJECT_HANDLE_NW; break;}
-
- /* East */
- create_handle_path (cr, object, scale, w, h/2);
- if (cairo_in_fill (cr, x, y)) {handle = GL_VIEW_OBJECT_HANDLE_E; break;}
-
- /* South */
- create_handle_path (cr, object, scale, w/2, h);
- if (cairo_in_fill (cr, x, y)) {handle = GL_VIEW_OBJECT_HANDLE_S; break;}
-
- /* West */
- create_handle_path (cr, object, scale, 0, h/2);
- if (cairo_in_fill (cr, x, y)) {handle = GL_VIEW_OBJECT_HANDLE_W; break;}
-
- /* North */
- create_handle_path (cr, object, scale, w/2, 0);
- if (cairo_in_fill (cr, x, y)) {handle = GL_VIEW_OBJECT_HANDLE_N; break;}
-
- break;
-
- case GL_VIEW_OBJECT_HANDLES_LINE:
- /* P2 */
- create_handle_path (cr, object, scale, w, h);
- if (cairo_in_fill (cr, x, y)) {handle = GL_VIEW_OBJECT_HANDLE_P2; break;}
-
- /* P1 */
- create_handle_path (cr, object, scale, 0, 0);
- if (cairo_in_fill (cr, x, y)) {handle = GL_VIEW_OBJECT_HANDLE_P1; break;}
-
- break;
-
- }
-
- cairo_restore (cr);
-
- return handle;
-}
-
-
-/*---------------------------------------------------------------------------*/
-/* PRIVATE. Resize object. */
-/*---------------------------------------------------------------------------*/
-void
-gl_view_object_resize_event (glViewObject *view_object,
- glViewObjectHandle handle,
- gboolean honor_aspect,
- cairo_t *cr,
- gdouble x,
- gdouble y)
-{
- glLabelObject *object;
- cairo_matrix_t matrix;
- gdouble x0, y0, x1, y1, x2, y2;
- gdouble w, h;
- gdouble dx=0, dy=0;
-
- gl_debug (DEBUG_VIEW, "x,y world = %g, %g", x, y);
-
- object = view_object->priv->object;
-
- /*
- * Change to item relative coordinates
- */
- cairo_save (cr);
- gl_label_object_get_position (object, &x0, &y0);
- cairo_translate (cr, x0, y0);
- gl_label_object_get_matrix (object, &matrix);
- cairo_transform (cr, &matrix);
-
- /*
- * Initialize origin and 2 corners in object relative coordinates.
- */
- x0 = 0.0;
- y0 = 0.0;
-
- x1 = 0.0;
- y1 = 0.0;
-
- gl_label_object_get_size (object, &x2, &y2);
-
- gl_debug (DEBUG_VIEW, "x0,y0 object = %g, %g", x0, y0);
- gl_debug (DEBUG_VIEW, "x1,y1 object = %g, %g", x1, y1);
- gl_debug (DEBUG_VIEW, "x2,y2 object = %g, %g", x2, y2);
-
- /*
- * Translate x,y into object relative coordinates.
- */
- cairo_device_to_user (cr, &x, &y);
-
- gl_debug (DEBUG_VIEW, "x,y object = %g, %g", x, y);
-
- /*
- * Get new size
- */
- switch (handle)
- {
-
- case GL_VIEW_OBJECT_HANDLE_NW:
- w = MAX (x2 - x, 0);
- h = MAX (y2 - y, 0);
- break;
-
- case GL_VIEW_OBJECT_HANDLE_N:
- w = x2 - x1;
- h = MAX (y2 - y, 0);
- break;
-
- case GL_VIEW_OBJECT_HANDLE_NE:
- w = MAX (x - x1, 0);
- h = MAX (y2 - y, 0);
- break;
-
- case GL_VIEW_OBJECT_HANDLE_E:
- w = MAX (x - x1, 0);
- h = y2 - y1;
- break;
-
- case GL_VIEW_OBJECT_HANDLE_SE:
- w = MAX (x - x1, 0);
- h = MAX (y - y1, 0);
- break;
-
- case GL_VIEW_OBJECT_HANDLE_S:
- w = x2 - x1;
- h = MAX (y - y1, 0);
- break;
-
- case GL_VIEW_OBJECT_HANDLE_SW:
- w = MAX (x2 - x, 0);
- h = MAX (y - y1, 0);
- break;
-
- case GL_VIEW_OBJECT_HANDLE_W:
- w = MAX (x2 - x, 0);
- h = y2 - y1;
- break;
- case GL_VIEW_OBJECT_HANDLE_P1:
- x1 = x;
- y1 = y;
- dx = (x2 - x);
- dy = (y2 - y);
- x0 = x0 + x1;
- y0 = y0 + y1;
- break;
-
- case GL_VIEW_OBJECT_HANDLE_P2:
- dx = x - x1;
- dy = y - y1;
- x0 = x0 + x1;
- y0 = y0 + y1;
- break;
-
- default:
- g_print ("Invalid handle.\n"); /* Should not happen! */
-
- }
- if ( (handle != GL_VIEW_OBJECT_HANDLE_P1) && (handle != GL_VIEW_OBJECT_HANDLE_P2) )
- {
- if ( honor_aspect )
- {
- gl_label_object_set_size_honor_aspect (object, w, h);
- }
- else
- {
- gl_label_object_set_size (object, w, h);
- }
-
- /*
- * Query the new size in case it was constrained.
- */
- gl_label_object_get_size (object, &w, &h);
-
- /*
- * Get new position
- */
- switch (handle)
- {
-
- case GL_VIEW_OBJECT_HANDLE_NW:
- x0 += x2 - w;
- y0 += y2 - h;
- break;
-
- case GL_VIEW_OBJECT_HANDLE_N:
- case GL_VIEW_OBJECT_HANDLE_NE:
- /* x unchanged */
- y0 += y2 - h;
- break;
-
- case GL_VIEW_OBJECT_HANDLE_E:
- case GL_VIEW_OBJECT_HANDLE_SE:
- case GL_VIEW_OBJECT_HANDLE_S:
- /* unchanged */
- break;
-
- case GL_VIEW_OBJECT_HANDLE_SW:
- case GL_VIEW_OBJECT_HANDLE_W:
- x0 += x2 - w;
- /* y unchanged */
- break;
-
- default:
- g_print ("Invalid handle.\n"); /* Should not happen! */
- }
- }
- else
- {
- gl_label_object_set_size (object, dx, dy);
- }
-
- /*
- * Put new origin back into world coordinates and set.
- */
- cairo_user_to_device (cr, &x0, &y0);
- cairo_restore (cr);
- cairo_device_to_user (cr, &x0, &y0);
- gl_label_object_set_position (object, x0, y0);
-}
-
-
-
-/*
- * Local Variables: -- emacs
- * mode: C -- emacs
- * c-basic-offset: 8 -- emacs
- * tab-width: 8 -- emacs
- * indent-tabs-mode: nil -- emacs
- * End: -- emacs
- */
projects / glabels / blobdiff