Adding upstream version 2.10.36.upstream/2.10.36

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 697 insertions, 0 deletions

diff --git a/app/widgets/gimpnavigationview.c b/app/widgets/gimpnavigationview.c
new file mode 100644
index 0000000..d3edfd1
--- /dev/null
+++ b/app/widgets/gimpnavigationview.c
@@ -0,0 +1,697 @@
+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * GimpNavigationView Widget
+ * Copyright (C) 2001-2002 Michael Natterer <mitch@gimp.org>
+ *
+ * partly based on app/nav_window
+ * Copyright (C) 1999 Andy Thomas <alt@gimp.org>
+ *
+ * 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 <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <math.h>
+
+#include <gegl.h>
+#include <gtk/gtk.h>
+#include <gdk/gdkkeysyms.h>
+
+#include "libgimpmath/gimpmath.h"
+
+#include "widgets-types.h"
+
+#include "core/gimpimage.h"
+#include "core/gimpmarshal.h"
+
+#include "display/gimpcanvas-style.h"
+
+#include "gimpnavigationview.h"
+#include "gimpviewrenderer.h"
+#include "gimpwidgets-utils.h"
+
+
+#define BORDER_WIDTH 2
+
+
+enum
+{
+  MARKER_CHANGED,
+  ZOOM,
+  SCROLL,
+  LAST_SIGNAL
+};
+
+
+struct _GimpNavigationView
+{
+  GimpView     parent_instance;
+
+  /*  values in image coordinates  */
+  gdouble      center_x;
+  gdouble      center_y;
+  gdouble      width;
+  gdouble      height;
+  gboolean     flip_horizontally;
+  gboolean     flip_vertically;
+  gdouble      rotate_angle;
+
+  gboolean     canvas_visible;
+  gdouble      canvas_x;
+  gdouble      canvas_y;
+  gdouble      canvas_width;
+  gdouble      canvas_height;
+
+  /*  values in view coordinates  */
+  gint         p_center_x;
+  gint         p_center_y;
+  gint         p_width;
+  gint         p_height;
+
+  gint         p_canvas_x;
+  gint         p_canvas_y;
+  gint         p_canvas_width;
+  gint         p_canvas_height;
+
+  gint         motion_offset_x;
+  gint         motion_offset_y;
+  gboolean     has_grab;
+};
+
+
+static void     gimp_navigation_view_size_allocate   (GtkWidget      *widget,
+                                                      GtkAllocation  *allocation);
+static gboolean gimp_navigation_view_expose          (GtkWidget      *widget,
+                                                      GdkEventExpose *event);
+static gboolean gimp_navigation_view_button_press    (GtkWidget      *widget,
+                                                      GdkEventButton *bevent);
+static gboolean gimp_navigation_view_button_release  (GtkWidget      *widget,
+                                                      GdkEventButton *bevent);
+static gboolean gimp_navigation_view_scroll          (GtkWidget      *widget,
+                                                      GdkEventScroll *sevent);
+static gboolean gimp_navigation_view_motion_notify   (GtkWidget      *widget,
+                                                      GdkEventMotion *mevent);
+static gboolean gimp_navigation_view_key_press       (GtkWidget      *widget,
+                                                      GdkEventKey    *kevent);
+
+static void     gimp_navigation_view_transform       (GimpNavigationView *nav_view);
+static void     gimp_navigation_view_draw_marker     (GimpNavigationView *nav_view,
+                                                      cairo_t            *cr);
+static void     gimp_navigation_view_move_to         (GimpNavigationView *nav_view,
+                                                      gint                tx,
+                                                      gint                ty);
+static void     gimp_navigation_view_get_ratio       (GimpNavigationView *nav_view,
+                                                      gdouble            *ratiox,
+                                                      gdouble            *ratioy);
+static gboolean gimp_navigation_view_point_in_marker (GimpNavigationView *nav_view,
+                                                      gint                x,
+                                                      gint                y);
+
+
+G_DEFINE_TYPE (GimpNavigationView, gimp_navigation_view, GIMP_TYPE_VIEW)
+
+#define parent_class gimp_navigation_view_parent_class
+
+static guint view_signals[LAST_SIGNAL] = { 0 };
+
+
+static void
+gimp_navigation_view_class_init (GimpNavigationViewClass *klass)
+{
+  GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+  view_signals[MARKER_CHANGED] =
+    g_signal_new ("marker-changed",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GimpNavigationViewClass, marker_changed),
+                  NULL, NULL,
+                  gimp_marshal_VOID__DOUBLE_DOUBLE_DOUBLE_DOUBLE,
+                  G_TYPE_NONE, 4,
+                  G_TYPE_DOUBLE,
+                  G_TYPE_DOUBLE,
+                  G_TYPE_DOUBLE,
+                  G_TYPE_DOUBLE);
+
+  view_signals[ZOOM] =
+    g_signal_new ("zoom",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GimpNavigationViewClass, zoom),
+                  NULL, NULL,
+                  gimp_marshal_VOID__ENUM,
+                  G_TYPE_NONE, 1,
+                  GIMP_TYPE_ZOOM_TYPE);
+
+  view_signals[SCROLL] =
+    g_signal_new ("scroll",
+                  G_TYPE_FROM_CLASS (klass),
+                  G_SIGNAL_RUN_FIRST,
+                  G_STRUCT_OFFSET (GimpNavigationViewClass, scroll),
+                  NULL, NULL,
+                  gimp_marshal_VOID__ENUM,
+                  G_TYPE_NONE, 1,
+                  GDK_TYPE_SCROLL_DIRECTION);
+
+  widget_class->size_allocate        = gimp_navigation_view_size_allocate;
+  widget_class->expose_event         = gimp_navigation_view_expose;
+  widget_class->button_press_event   = gimp_navigation_view_button_press;
+  widget_class->button_release_event = gimp_navigation_view_button_release;
+  widget_class->scroll_event         = gimp_navigation_view_scroll;
+  widget_class->motion_notify_event  = gimp_navigation_view_motion_notify;
+  widget_class->key_press_event      = gimp_navigation_view_key_press;
+}
+
+static void
+gimp_navigation_view_init (GimpNavigationView *view)
+{
+  gtk_widget_set_can_focus (GTK_WIDGET (view), TRUE);
+  gtk_widget_add_events (GTK_WIDGET (view),
+                         GDK_POINTER_MOTION_MASK |
+                         GDK_KEY_PRESS_MASK);
+
+  view->center_x          = 0.0;
+  view->center_y          = 0.0;
+  view->width             = 0.0;
+  view->height            = 0.0;
+  view->flip_horizontally = FALSE;
+  view->flip_vertically   = FALSE;
+  view->rotate_angle      = 0.0;
+
+  view->canvas_visible    = FALSE;
+  view->canvas_x          = 0.0;
+  view->canvas_y          = 0.0;
+  view->canvas_width      = 0.0;
+  view->canvas_height     = 0.0;
+
+  view->p_center_x      = 0;
+  view->p_center_y      = 0;
+  view->p_width         = 0;
+  view->p_height        = 0;
+
+  view->p_canvas_x      = 0;
+  view->p_canvas_y      = 0;
+  view->p_canvas_width  = 0;
+  view->p_canvas_height = 0;
+
+  view->motion_offset_x = 0;
+  view->motion_offset_y = 0;
+  view->has_grab        = FALSE;
+}
+
+static void
+gimp_navigation_view_size_allocate (GtkWidget     *widget,
+                                    GtkAllocation *allocation)
+{
+  GTK_WIDGET_CLASS (parent_class)->size_allocate (widget, allocation);
+
+  if (GIMP_VIEW (widget)->renderer->viewable)
+    gimp_navigation_view_transform (GIMP_NAVIGATION_VIEW (widget));
+}
+
+static gboolean
+gimp_navigation_view_expose (GtkWidget      *widget,
+                             GdkEventExpose *event)
+{
+  if (gtk_widget_is_drawable (widget))
+    {
+      cairo_t *cr;
+
+      GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
+
+      cr = gdk_cairo_create (gtk_widget_get_window (widget));
+
+      gdk_cairo_region (cr, event->region);
+      cairo_clip (cr);
+
+      gimp_navigation_view_draw_marker (GIMP_NAVIGATION_VIEW (widget), cr);
+
+      cairo_destroy (cr);
+    }
+
+  return TRUE;
+}
+
+void
+gimp_navigation_view_grab_pointer (GimpNavigationView *nav_view)
+{
+  GtkWidget  *widget = GTK_WIDGET (nav_view);
+  GdkDisplay *display;
+  GdkCursor  *cursor;
+  GdkWindow  *window;
+
+  nav_view->has_grab = TRUE;
+
+  gtk_grab_add (widget);
+
+  display = gtk_widget_get_display (widget);
+  cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
+
+  window = GIMP_VIEW (nav_view)->event_window;
+
+  gdk_pointer_grab (window, FALSE,
+                    GDK_BUTTON_RELEASE_MASK      |
+                    GDK_POINTER_MOTION_HINT_MASK |
+                    GDK_BUTTON_MOTION_MASK       |
+                    GDK_EXTENSION_EVENTS_ALL,
+                    NULL, cursor, GDK_CURRENT_TIME);
+
+  gdk_cursor_unref (cursor);
+}
+
+static gboolean
+gimp_navigation_view_button_press (GtkWidget      *widget,
+                                   GdkEventButton *bevent)
+{
+  GimpNavigationView *nav_view = GIMP_NAVIGATION_VIEW (widget);
+  gint                tx, ty;
+  GdkDisplay         *display;
+
+  tx = bevent->x;
+  ty = bevent->y;
+
+  if (bevent->type == GDK_BUTTON_PRESS && bevent->button == 1)
+    {
+      if (! gimp_navigation_view_point_in_marker (nav_view, tx, ty))
+        {
+          GdkCursor *cursor;
+
+          nav_view->motion_offset_x = 0;
+          nav_view->motion_offset_y = 0;
+
+          gimp_navigation_view_move_to (nav_view, tx, ty);
+
+          display = gtk_widget_get_display (widget);
+          cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
+          gdk_window_set_cursor (GIMP_VIEW (widget)->event_window, cursor);
+          gdk_cursor_unref (cursor);
+        }
+      else
+        {
+          nav_view->motion_offset_x = tx - nav_view->p_center_x;
+          nav_view->motion_offset_y = ty - nav_view->p_center_y;
+        }
+
+      gimp_navigation_view_grab_pointer (nav_view);
+    }
+
+  return TRUE;
+}
+
+static gboolean
+gimp_navigation_view_button_release (GtkWidget      *widget,
+                                     GdkEventButton *bevent)
+{
+  GimpNavigationView *nav_view = GIMP_NAVIGATION_VIEW (widget);
+
+  if (bevent->button == 1 && nav_view->has_grab)
+    {
+      nav_view->has_grab = FALSE;
+
+      gtk_grab_remove (widget);
+      gdk_display_pointer_ungrab (gtk_widget_get_display (widget),
+                                  GDK_CURRENT_TIME);
+    }
+
+  return TRUE;
+}
+
+static gboolean
+gimp_navigation_view_scroll (GtkWidget      *widget,
+                             GdkEventScroll *sevent)
+{
+  if (sevent->state & gimp_get_toggle_behavior_mask ())
+    {
+      switch (sevent->direction)
+        {
+        case GDK_SCROLL_UP:
+          g_signal_emit (widget, view_signals[ZOOM], 0, GIMP_ZOOM_IN);
+          break;
+
+        case GDK_SCROLL_DOWN:
+          g_signal_emit (widget, view_signals[ZOOM], 0, GIMP_ZOOM_OUT);
+          break;
+
+        default:
+          break;
+        }
+    }
+  else
+    {
+      GdkScrollDirection direction = sevent->direction;
+
+      if (sevent->state & GDK_SHIFT_MASK)
+        switch (direction)
+          {
+          case GDK_SCROLL_UP:    direction = GDK_SCROLL_LEFT;  break;
+          case GDK_SCROLL_DOWN:  direction = GDK_SCROLL_RIGHT; break;
+          case GDK_SCROLL_LEFT:  direction = GDK_SCROLL_UP;    break;
+          case GDK_SCROLL_RIGHT: direction = GDK_SCROLL_DOWN;  break;
+          }
+
+      g_signal_emit (widget, view_signals[SCROLL], 0, direction);
+    }
+
+  return TRUE;
+}
+
+static gboolean
+gimp_navigation_view_motion_notify (GtkWidget      *widget,
+                                    GdkEventMotion *mevent)
+{
+  GimpNavigationView *nav_view = GIMP_NAVIGATION_VIEW (widget);
+  GimpView           *view     = GIMP_VIEW (widget);
+
+  if (! nav_view->has_grab)
+    {
+      GdkDisplay *display = gtk_widget_get_display (widget);
+      GdkCursor  *cursor;
+
+      if (nav_view->p_center_x == view->renderer->width  / 2 &&
+          nav_view->p_center_y == view->renderer->height / 2 &&
+          nav_view->p_width    == view->renderer->width      &&
+          nav_view->p_height   == view->renderer->height)
+        {
+          gdk_window_set_cursor (view->event_window, NULL);
+          return FALSE;
+        }
+      else if (gimp_navigation_view_point_in_marker (nav_view,
+                                                     mevent->x, mevent->y))
+        {
+          cursor = gdk_cursor_new_for_display (display, GDK_FLEUR);
+        }
+      else
+        {
+          cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
+        }
+
+      gdk_window_set_cursor (view->event_window, cursor);
+      gdk_cursor_unref (cursor);
+
+      return FALSE;
+    }
+
+  gimp_navigation_view_move_to (nav_view,
+                                mevent->x - nav_view->motion_offset_x,
+                                mevent->y - nav_view->motion_offset_y);
+
+  gdk_event_request_motions (mevent);
+
+  return TRUE;
+}
+
+static gboolean
+gimp_navigation_view_key_press (GtkWidget   *widget,
+                                GdkEventKey *kevent)
+{
+  GimpNavigationView *nav_view = GIMP_NAVIGATION_VIEW (widget);
+  gint                scroll_x = 0;
+  gint                scroll_y = 0;
+
+  switch (kevent->keyval)
+    {
+    case GDK_KEY_Up:
+      scroll_y = -1;
+      break;
+
+    case GDK_KEY_Left:
+      scroll_x = -1;
+      break;
+
+    case GDK_KEY_Right:
+      scroll_x = 1;
+      break;
+
+    case GDK_KEY_Down:
+      scroll_y = 1;
+      break;
+
+    default:
+      break;
+    }
+
+  if (scroll_x || scroll_y)
+    {
+      gimp_navigation_view_move_to (nav_view,
+                                    nav_view->p_center_x + scroll_x,
+                                    nav_view->p_center_y + scroll_y);
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+
+/*  public functions  */
+
+void
+gimp_navigation_view_set_marker (GimpNavigationView *nav_view,
+                                 gdouble             center_x,
+                                 gdouble             center_y,
+                                 gdouble             width,
+                                 gdouble             height,
+                                 gboolean            flip_horizontally,
+                                 gboolean            flip_vertically,
+                                 gdouble             rotate_angle)
+{
+  GimpView *view;
+
+  g_return_if_fail (GIMP_IS_NAVIGATION_VIEW (nav_view));
+
+  view = GIMP_VIEW (nav_view);
+
+  g_return_if_fail (view->renderer->viewable);
+
+  nav_view->center_x          = center_x;
+  nav_view->center_y          = center_y;
+  nav_view->width             = MAX (1.0, width);
+  nav_view->height            = MAX (1.0, height);
+  nav_view->flip_horizontally = flip_horizontally ? TRUE : FALSE;
+  nav_view->flip_vertically   = flip_vertically   ? TRUE : FALSE;
+  nav_view->rotate_angle      = rotate_angle;
+
+  gimp_navigation_view_transform (nav_view);
+
+  /* Marker changed, redraw */
+  gtk_widget_queue_draw (GTK_WIDGET (view));
+}
+
+void
+gimp_navigation_view_set_canvas (GimpNavigationView *nav_view,
+                                 gboolean            visible,
+                                 gdouble             x,
+                                 gdouble             y,
+                                 gdouble             width,
+                                 gdouble             height)
+{
+  GimpView *view;
+
+  g_return_if_fail (GIMP_IS_NAVIGATION_VIEW (nav_view));
+
+  view = GIMP_VIEW (nav_view);
+
+  g_return_if_fail (view->renderer->viewable);
+
+  nav_view->canvas_visible = visible;
+  nav_view->canvas_x       = x;
+  nav_view->canvas_y       = y;
+  nav_view->canvas_width   = MAX (1.0, width);
+  nav_view->canvas_height  = MAX (1.0, height);
+
+  gimp_navigation_view_transform (nav_view);
+
+  /* Marker changed, redraw */
+  gtk_widget_queue_draw (GTK_WIDGET (view));
+}
+
+void
+gimp_navigation_view_set_motion_offset (GimpNavigationView *view,
+                                        gint                motion_offset_x,
+                                        gint                motion_offset_y)
+{
+  g_return_if_fail (GIMP_IS_NAVIGATION_VIEW (view));
+
+  view->motion_offset_x = motion_offset_x;
+  view->motion_offset_y = motion_offset_y;
+}
+
+void
+gimp_navigation_view_get_local_marker (GimpNavigationView *view,
+                                       gint               *center_x,
+                                       gint               *center_y,
+                                       gint               *width,
+                                       gint               *height)
+{
+  g_return_if_fail (GIMP_IS_NAVIGATION_VIEW (view));
+
+  if (center_x) *center_x = view->p_center_x;
+  if (center_y) *center_y = view->p_center_y;
+  if (width)    *width    = view->p_width;
+  if (height)   *height   = view->p_height;
+}
+
+
+/*  private functions  */
+
+static void
+gimp_navigation_view_transform (GimpNavigationView *nav_view)
+{
+  gdouble ratiox, ratioy;
+
+  gimp_navigation_view_get_ratio (nav_view, &ratiox, &ratioy);
+
+  nav_view->p_center_x = RINT (nav_view->center_x * ratiox);
+  nav_view->p_center_y = RINT (nav_view->center_y * ratioy);
+
+  nav_view->p_width  = ceil (nav_view->width  * ratiox);
+  nav_view->p_height = ceil (nav_view->height * ratioy);
+
+  nav_view->p_canvas_x = RINT (nav_view->canvas_x * ratiox);
+  nav_view->p_canvas_y = RINT (nav_view->canvas_y * ratioy);
+
+  nav_view->p_canvas_width  = ceil (nav_view->canvas_width  * ratiox);
+  nav_view->p_canvas_height = ceil (nav_view->canvas_height * ratioy);
+}
+
+static void
+gimp_navigation_view_draw_marker (GimpNavigationView *nav_view,
+                                  cairo_t            *cr)
+{
+  GimpView *view = GIMP_VIEW (nav_view);
+
+  if (view->renderer->viewable && nav_view->width && nav_view->height)
+    {
+      GtkWidget      *widget = GTK_WIDGET (view);
+      GtkAllocation   allocation;
+      cairo_matrix_t  matrix;
+      gint            p_width_2;
+      gint            p_height_2;
+      gdouble         angle;
+
+      p_width_2  = nav_view->p_width  / 2;
+      p_height_2 = nav_view->p_height / 2;
+
+      angle = G_PI * nav_view->rotate_angle / 180.0;
+      if (nav_view->flip_horizontally != nav_view->flip_vertically)
+        angle = -angle;
+
+      gtk_widget_get_allocation (widget, &allocation);
+
+      cairo_translate (cr, allocation.x, allocation.y);
+
+      cairo_get_matrix (cr, &matrix);
+
+      cairo_rectangle (cr,
+                       0, 0,
+                       allocation.width, allocation.height);
+      cairo_translate (cr, nav_view->p_center_x, nav_view->p_center_y);
+      cairo_rotate (cr, -angle);
+      cairo_rectangle (cr,
+                       -p_width_2, -p_height_2,
+                       nav_view->p_width, nav_view->p_height);
+
+      cairo_set_source_rgba (cr, 0, 0, 0, 0.5);
+      cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
+      cairo_fill (cr);
+
+      if (nav_view->canvas_visible &&
+          nav_view->canvas_width && nav_view->canvas_height)
+        {
+          cairo_save (cr);
+
+          cairo_set_matrix (cr, &matrix);
+
+          cairo_rectangle (cr,
+                           nav_view->p_canvas_x      + 0.5,
+                           nav_view->p_canvas_y      + 0.5,
+                           nav_view->p_canvas_width  - 1.0,
+                           nav_view->p_canvas_height - 1.0);
+          gimp_canvas_set_canvas_style (GTK_WIDGET (nav_view), cr, 0, 0);
+          cairo_stroke (cr);
+
+          cairo_restore (cr);
+        }
+
+      cairo_rectangle (cr,
+                       -p_width_2, -p_height_2,
+                       nav_view->p_width, nav_view->p_height);
+
+      cairo_set_source_rgb (cr, 1, 1, 1);
+      cairo_set_line_width (cr, BORDER_WIDTH);
+      cairo_stroke (cr);
+    }
+}
+
+static void
+gimp_navigation_view_move_to (GimpNavigationView *nav_view,
+                              gint                tx,
+                              gint                ty)
+{
+  GimpView  *view = GIMP_VIEW (nav_view);
+  gdouble    ratiox, ratioy;
+  gdouble    x, y;
+
+  if (! view->renderer->viewable)
+    return;
+
+  gimp_navigation_view_get_ratio (nav_view, &ratiox, &ratioy);
+
+  x = tx / ratiox;
+  y = ty / ratioy;
+
+  g_signal_emit (view, view_signals[MARKER_CHANGED], 0,
+                 x, y, nav_view->width, nav_view->height);
+}
+
+static void
+gimp_navigation_view_get_ratio (GimpNavigationView *nav_view,
+                                gdouble            *ratiox,
+                                gdouble            *ratioy)
+{
+  GimpView  *view = GIMP_VIEW (nav_view);
+  gint       width;
+  gint       height;
+
+  gimp_viewable_get_size (view->renderer->viewable, &width, &height);
+
+  *ratiox = (gdouble) view->renderer->width  / (gdouble) width;
+  *ratioy = (gdouble) view->renderer->height / (gdouble) height;
+}
+
+static gboolean
+gimp_navigation_view_point_in_marker (GimpNavigationView *nav_view,
+                                      gint                x,
+                                      gint                y)
+{
+  gint    p_width_2, p_height_2;
+  gdouble angle;
+  gdouble tx, ty;
+
+  p_width_2  = nav_view->p_width  / 2;
+  p_height_2 = nav_view->p_height / 2;
+
+  angle = G_PI * nav_view->rotate_angle / 180.0;
+  if (nav_view->flip_horizontally != nav_view->flip_vertically)
+    angle = -angle;
+
+  x -= nav_view->p_center_x;
+  y -= nav_view->p_center_y;
+
+  tx = cos (angle) * x - sin (angle) * y;
+  ty = sin (angle) * x + cos (angle) * y;
+
+  return tx >= -p_width_2  && tx < p_width_2 &&
+         ty >= -p_height_2 && ty < p_height_2;
+}