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gimp/app/display/gimpdisplayshell-callbacks.c

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/* GIMP - The GNU Image Manipulation Program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* 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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gegl.h>
#include <gtk/gtk.h>
#include "libgimpmath/gimpmath.h"
#include "libgimpwidgets/gimpwidgets.h"
#include "display-types.h"
#include "core/gimp.h"
#include "core/gimpimage.h"
#include "core/gimpimage-quick-mask.h"
#include "widgets/gimpcairo-wilber.h"
#include "widgets/gimpuimanager.h"
#include "gimpcanvasitem.h"
#include "gimpdisplay.h"
#include "gimpdisplayshell.h"
#include "gimpdisplayshell-appearance.h"
#include "gimpdisplayshell-callbacks.h"
#include "gimpdisplayshell-draw.h"
#include "gimpdisplayshell-scale.h"
#include "gimpdisplayshell-scroll.h"
#include "gimpdisplayshell-selection.h"
#include "gimpdisplayshell-title.h"
#include "gimpdisplayxfer.h"
#include "gimpimagewindow.h"
#include "gimpnavigationeditor.h"
#include "gimp-intl.h"
/* local function prototypes */
static void gimp_display_shell_vadjustment_changed (GtkAdjustment *adjustment,
GimpDisplayShell *shell);
static void gimp_display_shell_hadjustment_changed (GtkAdjustment *adjustment,
GimpDisplayShell *shell);
static gboolean gimp_display_shell_vscrollbar_change_value (GtkRange *range,
GtkScrollType scroll,
gdouble value,
GimpDisplayShell *shell);
static gboolean gimp_display_shell_hscrollbar_change_value (GtkRange *range,
GtkScrollType scroll,
gdouble value,
GimpDisplayShell *shell);
static void gimp_display_shell_canvas_draw_image (GimpDisplayShell *shell,
cairo_t *cr);
static void gimp_display_shell_canvas_draw_drop_zone (GimpDisplayShell *shell,
cairo_t *cr);
/* public functions */
void
gimp_display_shell_canvas_realize (GtkWidget *canvas,
GimpDisplayShell *shell)
{
GimpCanvasPaddingMode padding_mode;
GimpRGB padding_color;
GtkAllocation allocation;
gtk_widget_grab_focus (canvas);
gimp_display_shell_get_padding (shell, &padding_mode, &padding_color);
gimp_display_shell_set_padding (shell, padding_mode, &padding_color);
gtk_widget_get_allocation (canvas, &allocation);
gimp_display_shell_title_update (shell);
shell->disp_width = allocation.width;
shell->disp_height = allocation.height;
/* set up the scrollbar observers */
g_signal_connect (shell->hsbdata, "value-changed",
G_CALLBACK (gimp_display_shell_hadjustment_changed),
shell);
g_signal_connect (shell->vsbdata, "value-changed",
G_CALLBACK (gimp_display_shell_vadjustment_changed),
shell);
g_signal_connect (shell->hsb, "change-value",
G_CALLBACK (gimp_display_shell_hscrollbar_change_value),
shell);
g_signal_connect (shell->vsb, "change-value",
G_CALLBACK (gimp_display_shell_vscrollbar_change_value),
shell);
/* allow shrinking */
gtk_widget_set_size_request (GTK_WIDGET (shell), 0, 0);
shell->xfer = gimp_display_xfer_realize (GTK_WIDGET(shell));
}
void
gimp_display_shell_canvas_size_allocate (GtkWidget *widget,
GtkAllocation *allocation,
GimpDisplayShell *shell)
{
/* are we in destruction? */
if (! shell->display || ! gimp_display_get_shell (shell->display))
return;
if ((shell->disp_width != allocation->width) ||
(shell->disp_height != allocation->height))
{
if (shell->zoom_on_resize &&
shell->disp_width > 64 &&
shell->disp_height > 64 &&
allocation->width > 64 &&
allocation->height > 64)
{
gdouble scale = gimp_zoom_model_get_factor (shell->zoom);
gint offset_x;
gint offset_y;
/* FIXME: The code is a bit of a mess */
/* multiply the zoom_factor with the ratio of the new and
* old canvas diagonals
*/
scale *= (sqrt (SQR (allocation->width) +
SQR (allocation->height)) /
sqrt (SQR (shell->disp_width) +
SQR (shell->disp_height)));
offset_x = UNSCALEX (shell, shell->offset_x);
offset_y = UNSCALEX (shell, shell->offset_y);
gimp_zoom_model_zoom (shell->zoom, GIMP_ZOOM_TO, scale);
shell->offset_x = SCALEX (shell, offset_x);
shell->offset_y = SCALEY (shell, offset_y);
}
shell->disp_width = allocation->width;
shell->disp_height = allocation->height;
/* When we size-allocate due to resize of the top level window,
* we want some additional logic. Don't apply it on
* zoom_on_resize though.
*/
if (shell->size_allocate_from_configure_event &&
! shell->zoom_on_resize)
{
gboolean center_horizontally;
gboolean center_vertically;
gint target_offset_x;
gint target_offset_y;
gint sw;
gint sh;
gimp_display_shell_scale_get_image_size (shell, &sw, &sh);
center_horizontally = sw <= shell->disp_width;
center_vertically = sh <= shell->disp_height;
gimp_display_shell_scroll_center_image (shell,
center_horizontally,
center_vertically);
/* This is basically the best we can do before we get an
* API for storing the image offset at the start of an
* image window resize using the mouse
*/
target_offset_x = shell->offset_x;
target_offset_y = shell->offset_y;
if (! center_horizontally)
{
target_offset_x = MAX (shell->offset_x, 0);
}
if (! center_vertically)
{
target_offset_y = MAX (shell->offset_y, 0);
}
gimp_display_shell_scroll_set_offset (shell,
target_offset_x,
target_offset_y);
}
gimp_display_shell_scroll_clamp_and_update (shell);
gimp_display_shell_scaled (shell);
/* Reset */
shell->size_allocate_from_configure_event = FALSE;
}
}
gboolean
gimp_display_shell_canvas_expose (GtkWidget *widget,
GdkEventExpose *eevent,
GimpDisplayShell *shell)
{
/* are we in destruction? */
if (! shell->display || ! gimp_display_get_shell (shell->display))
return TRUE;
/* ignore events on overlays */
if (eevent->window == gtk_widget_get_window (widget))
{
cairo_t *cr;
cr = gdk_cairo_create (gtk_widget_get_window (shell->canvas));
gdk_cairo_region (cr, eevent->region);
cairo_clip (cr);
if (gimp_display_get_image (shell->display))
{
gimp_display_shell_canvas_draw_image (shell, cr);
}
else
{
gimp_display_shell_canvas_draw_drop_zone (shell, cr);
}
cairo_destroy (cr);
}
return FALSE;
}
gboolean
gimp_display_shell_origin_button_press (GtkWidget *widget,
GdkEventButton *event,
GimpDisplayShell *shell)
{
if (! shell->display->gimp->busy)
{
if (event->type == GDK_BUTTON_PRESS && event->button == 1)
{
gboolean unused;
g_signal_emit_by_name (shell, "popup-menu", &unused);
}
}
/* Return TRUE to stop signal emission so the button doesn't grab the
* pointer away from us.
*/
return TRUE;
}
gboolean
gimp_display_shell_quick_mask_button_press (GtkWidget *widget,
GdkEventButton *bevent,
GimpDisplayShell *shell)
{
if (! gimp_display_get_image (shell->display))
return TRUE;
if (gdk_event_triggers_context_menu ((GdkEvent *) bevent))
{
GimpImageWindow *window = gimp_display_shell_get_window (shell);
if (window)
{
GimpUIManager *manager = gimp_image_window_get_ui_manager (window);
gimp_ui_manager_ui_popup (manager,
"/quick-mask-popup",
GTK_WIDGET (shell),
NULL, NULL, NULL, NULL);
}
return TRUE;
}
return FALSE;
}
void
gimp_display_shell_quick_mask_toggled (GtkWidget *widget,
GimpDisplayShell *shell)
{
GimpImage *image = gimp_display_get_image (shell->display);
gboolean active = gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (widget));
if (active != gimp_image_get_quick_mask_state (image))
{
gimp_image_set_quick_mask_state (image, active);
gimp_image_flush (image);
}
}
gboolean
gimp_display_shell_navigation_button_press (GtkWidget *widget,
GdkEventButton *bevent,
GimpDisplayShell *shell)
{
if (! gimp_display_get_image (shell->display))
return TRUE;
if (bevent->type == GDK_BUTTON_PRESS && bevent->button == 1)
{
gimp_navigation_editor_popup (shell, widget, bevent->x, bevent->y);
}
return TRUE;
}
/* private functions */
static void
gimp_display_shell_vadjustment_changed (GtkAdjustment *adjustment,
GimpDisplayShell *shell)
{
/* If we are panning with mouse, scrollbars are to be ignored or
* they will cause jitter in motion
*/
if (! shell->scrolling)
gimp_display_shell_scroll (shell,
0,
gtk_adjustment_get_value (adjustment) -
shell->offset_y);
}
static void
gimp_display_shell_hadjustment_changed (GtkAdjustment *adjustment,
GimpDisplayShell *shell)
{
/* If we are panning with mouse, scrollbars are to be ignored or
* they will cause jitter in motion
*/
if (! shell->scrolling)
gimp_display_shell_scroll (shell,
gtk_adjustment_get_value (adjustment) -
shell->offset_x,
0);
}
static gboolean
gimp_display_shell_hscrollbar_change_value (GtkRange *range,
GtkScrollType scroll,
gdouble value,
GimpDisplayShell *shell)
{
if (! shell->display)
return TRUE;
if ((scroll == GTK_SCROLL_JUMP) ||
(scroll == GTK_SCROLL_PAGE_BACKWARD) ||
(scroll == GTK_SCROLL_PAGE_FORWARD))
return FALSE;
g_object_freeze_notify (G_OBJECT (shell->hsbdata));
gimp_display_shell_scroll_setup_hscrollbar (shell, value);
g_object_thaw_notify (G_OBJECT (shell->hsbdata)); /* emits "changed" */
return FALSE;
}
static gboolean
gimp_display_shell_vscrollbar_change_value (GtkRange *range,
GtkScrollType scroll,
gdouble value,
GimpDisplayShell *shell)
{
if (! shell->display)
return TRUE;
if ((scroll == GTK_SCROLL_JUMP) ||
(scroll == GTK_SCROLL_PAGE_BACKWARD) ||
(scroll == GTK_SCROLL_PAGE_FORWARD))
return FALSE;
g_object_freeze_notify (G_OBJECT (shell->vsbdata));
gimp_display_shell_scroll_setup_vscrollbar (shell, value);
g_object_thaw_notify (G_OBJECT (shell->vsbdata)); /* emits "changed" */
return FALSE;
}
static void
gimp_display_shell_canvas_draw_image (GimpDisplayShell *shell,
cairo_t *cr)
{
cairo_rectangle_list_t *clip_rectangles;
cairo_rectangle_int_t image_rect;
image_rect.x = - shell->offset_x;
image_rect.y = - shell->offset_y;
gimp_display_shell_scale_get_image_size (shell,
&image_rect.width,
&image_rect.height);
/* first, clear the exposed part of the region that is outside the
* image, which is the exposed region minus the image rectangle
*/
cairo_save (cr);
if (shell->rotate_transform)
cairo_transform (cr, shell->rotate_transform);
cairo_rectangle (cr,
image_rect.x,
image_rect.y,
image_rect.width,
image_rect.height);
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
cairo_clip (cr);
if (gdk_cairo_get_clip_rectangle (cr, NULL))
gimp_display_shell_draw_background (shell, cr);
cairo_restore (cr);
/* then, draw the exposed part of the region that is inside the
* image
*/
cairo_save (cr);
clip_rectangles = cairo_copy_clip_rectangle_list (cr);
if (shell->rotate_transform)
cairo_transform (cr, shell->rotate_transform);
cairo_rectangle (cr,
image_rect.x,
image_rect.y,
image_rect.width,
image_rect.height);
cairo_clip (cr);
if (gdk_cairo_get_clip_rectangle (cr, NULL))
{
gint i;
cairo_save (cr);
gimp_display_shell_draw_checkerboard (shell, cr);
cairo_restore (cr);
for (i = 0; i < clip_rectangles->num_rectangles; i++)
{
cairo_rectangle_t rect = clip_rectangles->rectangles[i];
gimp_display_shell_draw_image (shell, cr,
floor (rect.x),
floor (rect.y),
ceil (rect.width),
ceil (rect.height));
}
}
cairo_rectangle_list_destroy (clip_rectangles);
cairo_restore (cr);
/* finally, draw all the remaining image window stuff on top
*/
/* draw canvas items */
cairo_save (cr);
if (shell->rotate_transform)
cairo_transform (cr, shell->rotate_transform);
gimp_canvas_item_draw (shell->canvas_item, cr);
cairo_restore (cr);
gimp_canvas_item_draw (shell->unrotated_item, cr);
/* restart (and recalculate) the selection boundaries */
gimp_display_shell_selection_restart (shell);
}
static void
gimp_display_shell_canvas_draw_drop_zone (GimpDisplayShell *shell,
cairo_t *cr)
{
cairo_save (cr);
gimp_display_shell_draw_background (shell, cr);
gimp_cairo_draw_drop_wilber (shell->canvas, cr, shell->blink);
cairo_restore (cr);
#ifdef GIMP_UNSTABLE
{
PangoLayout *layout;
GtkAllocation allocation;
gint width;
gint height;
gdouble scale;
layout = gtk_widget_create_pango_layout (shell->canvas,
_("Unstable Development\n"
"Version"));
pango_layout_set_alignment (layout, PANGO_ALIGN_CENTER);
pango_layout_get_pixel_size (layout, &width, &height);
gtk_widget_get_allocation (shell->canvas, &allocation);
scale = MIN (((gdouble) allocation.width / 2.0) / (gdouble) width,
((gdouble) allocation.height / 2.0) / (gdouble) height);
cairo_move_to (cr,
(allocation.width - (width * scale)) / 2,
(allocation.height - (height * scale)) / 2);
cairo_scale (cr, scale, scale);
pango_cairo_show_layout (cr, layout);
g_object_unref (layout);
}
#endif /* GIMP_UNSTABLE */
}
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