/**
* gimp_display_shell_scale_by_values:
* @shell: the #GimpDisplayShell
* @scale: the new scale
* @offset_x: the new X offset
* @offset_y: the new Y offset
* @resize_window: whether the display window should be resized
*
* Directly sets the image scale and image offsets used by the display. If
* @resize_window is %TRUE then the display window is resized to better
* accommodate the image, see gimp_display_shell_shrink_wrap().
**/
void
gimp_display_shell_scale_by_values (GimpDisplayShell *shell,
gdouble scale,
gint offset_x,
gint offset_y,
gboolean resize_window)
{
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
/* Abort early if the values are all setup already. We don't
* want to inadvertently resize the window (bug #164281).
*/
if (SCALE_EQUALS (gimp_zoom_model_get_factor (shell->zoom), scale) &&
shell->offset_x == offset_x &&
shell->offset_y == offset_y)
return;
gimp_display_shell_scale_save_revert_values (shell);
/* freeze the active tool */
gimp_display_shell_pause (shell);
gimp_zoom_model_zoom (shell->zoom, GIMP_ZOOM_TO, scale);
shell->offset_x = offset_x;
shell->offset_y = offset_y;
gimp_display_shell_scale_resize (shell, resize_window, FALSE);
/* re-enable the active tool */
gimp_display_shell_resume (shell);
}
/**
* gimp_display_shell_scale_dialog:
* @shell: the #GimpDisplayShell
*
* Constructs and displays a dialog allowing the user to enter a
* custom display scale.
**/
void
gimp_display_shell_scale_dialog (GimpDisplayShell *shell)
{
ScaleDialogData *data;
GimpImage *image;
GtkWidget *toplevel;
GtkWidget *hbox;
GtkWidget *grid;
GtkWidget *spin;
GtkWidget *label;
gint num, denom, row;
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
if (shell->scale_dialog)
{
gtk_window_present (GTK_WINDOW (shell->scale_dialog));
return;
}
if (SCALE_EQUALS (shell->other_scale, 0.0))
{
/* other_scale not yet initialized */
shell->other_scale = gimp_zoom_model_get_factor (shell->zoom);
}
image = gimp_display_get_image (shell->display);
data = g_slice_new (ScaleDialogData);
data->shell = shell;
data->model = g_object_new (GIMP_TYPE_ZOOM_MODEL,
"value", fabs (shell->other_scale),
NULL);
shell->scale_dialog =
gimp_viewable_dialog_new (GIMP_VIEWABLE (image),
gimp_get_user_context (shell->display->gimp),
_("Zoom Ratio"), "display_scale",
"zoom-original",
_("Select Zoom Ratio"),
GTK_WIDGET (shell),
gimp_standard_help_func,
GIMP_HELP_VIEW_ZOOM_OTHER,
_("_Cancel"), GTK_RESPONSE_CANCEL,
_("_OK"), GTK_RESPONSE_OK,
NULL);
gimp_dialog_set_alternative_button_order (GTK_DIALOG (shell->scale_dialog),
GTK_RESPONSE_OK,
GTK_RESPONSE_CANCEL,
-1);
g_object_weak_ref (G_OBJECT (shell->scale_dialog),
(GWeakNotify) gimp_display_shell_scale_dialog_free, data);
g_object_weak_ref (G_OBJECT (shell->scale_dialog),
(GWeakNotify) g_object_unref, data->model);
g_object_add_weak_pointer (G_OBJECT (shell->scale_dialog),
(gpointer) &shell->scale_dialog);
toplevel = gtk_widget_get_toplevel (GTK_WIDGET (shell));
gtk_window_set_transient_for (GTK_WINDOW (shell->scale_dialog),
GTK_WINDOW (toplevel));
gtk_window_set_destroy_with_parent (GTK_WINDOW (shell->scale_dialog), TRUE);
g_signal_connect (shell->scale_dialog, "response",
G_CALLBACK (gimp_display_shell_scale_dialog_response),
data);
grid = gtk_grid_new ();
gtk_container_set_border_width (GTK_CONTAINER (grid), 12);
gtk_grid_set_column_spacing (GTK_GRID (grid), 6);
gtk_grid_set_row_spacing (GTK_GRID (grid), 6);
gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (shell->scale_dialog))),
grid, TRUE, TRUE, 0);
gtk_widget_show (grid);
row = 0;
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gimp_grid_attach_aligned (GTK_GRID (grid), 0, row++,
_("Zoom ratio:"), 0.0, 0.5,
hbox, 1);
gimp_zoom_model_get_fraction (data->model, &num, &denom);
data->num_adj = gtk_adjustment_new (num, 1, 256, 1, 8, 0);
spin = gimp_spin_button_new (data->num_adj, 1.0, 0);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spin), TRUE);
gtk_entry_set_activates_default (GTK_ENTRY (spin), TRUE);
gtk_box_pack_start (GTK_BOX (hbox), spin, TRUE, TRUE, 0);
gtk_widget_show (spin);
label = gtk_label_new (":");
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
data->denom_adj = gtk_adjustment_new (denom, 1, 256, 1, 8, 0);
spin = gimp_spin_button_new (data->denom_adj, 1.0, 0);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spin), TRUE);
gtk_entry_set_activates_default (GTK_ENTRY (spin), TRUE);
gtk_box_pack_start (GTK_BOX (hbox), spin, TRUE, TRUE, 0);
gtk_widget_show (spin);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
gimp_grid_attach_aligned (GTK_GRID (grid), 0, row++,
_("Zoom:"), 0.0, 0.5,
hbox, 1);
data->scale_adj = gtk_adjustment_new (fabs (shell->other_scale) * 100,
100.0 / 256.0, 25600.0,
10, 50, 0);
spin = gimp_spin_button_new (data->scale_adj, 1.0, 2);
gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spin), TRUE);
gtk_entry_set_activates_default (GTK_ENTRY (spin), TRUE);
gtk_box_pack_start (GTK_BOX (hbox), spin, TRUE, TRUE, 0);
gtk_widget_show (spin);
label = gtk_label_new ("%");
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
gtk_widget_show (label);
g_signal_connect (data->scale_adj, "value-changed",
G_CALLBACK (update_zoom_values), data);
g_signal_connect (data->num_adj, "value-changed",
G_CALLBACK (update_zoom_values), data);
g_signal_connect (data->denom_adj, "value-changed",
G_CALLBACK (update_zoom_values), data);
gtk_widget_show (shell->scale_dialog);
}
/**
* gimp_display_shell_scale:
* @shell: the #GimpDisplayShell
* @zoom_type: whether to zoom in, our or to a specific scale
* @scale: ignored unless @zoom_type == %GIMP_ZOOM_TO
*
* This function figures out the context of the zoom and behaves
* appropriatley thereafter.
*
**/
void
gimp_display_shell_scale (GimpDisplayShell *shell,
GimpZoomType zoom_type,
gdouble new_scale,
GimpZoomFocus zoom_focus)
{
gdouble current_scale;
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
g_return_if_fail (shell->canvas != NULL);
current_scale = gimp_zoom_model_get_factor (shell->zoom);
if (zoom_type != GIMP_ZOOM_TO)
new_scale = gimp_zoom_model_zoom_step (zoom_type, current_scale);
if (! SCALE_EQUALS (new_scale, current_scale))
{
GimpDisplayConfig *config = shell->display->config;
gboolean resize_window;
/* Resize windows only in multi-window mode */
resize_window = (config->resize_windows_on_zoom &&
! GIMP_GUI_CONFIG (config)->single_window_mode);
if (resize_window)
{
/* If the window is resized on zoom, simply do the zoom and
* get things rolling
*/
gimp_zoom_model_zoom (shell->zoom, GIMP_ZOOM_TO, new_scale);
gimp_display_shell_scale_resize (shell, TRUE, FALSE);
}
else
{
gboolean starts_fitting_horiz;
gboolean starts_fitting_vert;
gboolean zoom_focus_almost_centered_horiz;
gboolean zoom_focus_almost_centered_vert;
gboolean image_center_almost_centered_horiz;
gboolean image_center_almost_centered_vert;
gdouble x, y;
gint image_center_x;
gint image_center_y;
gimp_display_shell_scale_get_zoom_focus (shell,
new_scale,
current_scale,
&x,
&y,
zoom_focus);
gimp_display_shell_scale_get_image_center_viewport (shell,
&image_center_x,
&image_center_y);
gimp_display_shell_scale_to (shell, new_scale, x, y);
/* If an image axis started to fit due to zooming out or if
* the focus point is as good as in the center, center on
* that axis
*/
gimp_display_shell_scale_image_starts_to_fit (shell,
new_scale,
current_scale,
&starts_fitting_horiz,
&starts_fitting_vert);
gimp_display_shell_scale_viewport_coord_almost_centered (shell,
x,
y,
&zoom_focus_almost_centered_horiz,
&zoom_focus_almost_centered_vert);
gimp_display_shell_scale_viewport_coord_almost_centered (shell,
image_center_x,
image_center_y,
&image_center_almost_centered_horiz,
&image_center_almost_centered_vert);
gimp_display_shell_scroll_center_image (shell,
starts_fitting_horiz ||
(zoom_focus_almost_centered_horiz &&
image_center_almost_centered_horiz),
starts_fitting_vert ||
(zoom_focus_almost_centered_vert &&
image_center_almost_centered_vert));
}
}
}
/**
* gimp_display_shell_scale:
* @shell: the #GimpDisplayShell
* @zoom_type: whether to zoom in, our or to a specific scale
* @scale: ignored unless @zoom_type == %GIMP_ZOOM_TO
*
* This function figures out the context of the zoom and behaves
* appropriatley thereafter.
*
**/
void
gimp_display_shell_scale (GimpDisplayShell *shell,
GimpZoomType zoom_type,
gdouble new_scale,
GimpZoomFocus zoom_focus)
{
gint x, y;
gdouble current_scale;
gdouble real_new_scale;
g_return_if_fail (GIMP_IS_DISPLAY_SHELL (shell));
g_return_if_fail (shell->canvas != NULL);
current_scale = gimp_zoom_model_get_factor (shell->zoom);
if (zoom_type != GIMP_ZOOM_TO)
{
real_new_scale = gimp_zoom_model_zoom_step (zoom_type, current_scale);
}
else
{
real_new_scale = new_scale;
}
if (! SCALE_EQUALS (real_new_scale, current_scale))
{
if (shell->display->config->resize_windows_on_zoom)
{
GimpImageWindow *window = gimp_display_shell_get_window (shell);
/* If the window is resized on zoom, simply do the zoom and
* get things rolling
*/
gimp_zoom_model_zoom (shell->zoom, GIMP_ZOOM_TO, real_new_scale);
gimp_display_shell_scaled (shell);
if (window && gimp_image_window_get_active_shell (window) == shell)
{
gimp_image_window_shrink_wrap (window, FALSE);
}
}
else
{
gboolean starts_fitting_horiz;
gboolean starts_fitting_vert;
gboolean zoom_focus_almost_centered_horiz;
gboolean zoom_focus_almost_centered_vert;
gboolean image_center_almost_centered_horiz;
gboolean image_center_almost_centered_vert;
gint image_center_x;
gint image_center_y;
gimp_display_shell_scale_get_zoom_focus (shell,
real_new_scale,
current_scale,
&x,
&y,
zoom_focus);
gimp_display_shell_scale_get_image_center_viewport (shell,
&image_center_x,
&image_center_y);
gimp_display_shell_scale_to (shell, real_new_scale, x, y);
/* If an image axis started to fit due to zooming out or if
* the focus point is as good as in the center, center on
* that axis
*/
gimp_display_shell_scale_image_starts_to_fit (shell,
real_new_scale,
current_scale,
&starts_fitting_horiz,
&starts_fitting_vert);
gimp_display_shell_scale_viewport_coord_almost_centered (shell,
x,
y,
&zoom_focus_almost_centered_horiz,
&zoom_focus_almost_centered_vert);
gimp_display_shell_scale_viewport_coord_almost_centered (shell,
image_center_x,
image_center_y,
&image_center_almost_centered_horiz,
&image_center_almost_centered_vert);
gimp_display_shell_scroll_center_image (shell,
starts_fitting_horiz ||
(zoom_focus_almost_centered_horiz &&
image_center_almost_centered_horiz),
starts_fitting_vert ||
(zoom_focus_almost_centered_vert &&
image_center_almost_centered_vert));
}
}
}