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PIKApp/libpika/pikaui.c

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/* LIBPIKA - The PIKA Library
* Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <gtk/gtk.h>
#ifdef GDK_WINDOWING_WIN32
#include <gdk/gdkwin32.h>
#endif
#ifdef GDK_WINDOWING_X11
#include <gdk/gdkx.h>
#endif
#ifdef GDK_WINDOWING_QUARTZ
#include <Cocoa/Cocoa.h>
#endif
#include "pika.h"
#include "pikaui.h"
#include "libpikamodule/pikamodule.h"
#include "libpikawidgets/pikawidgets.h"
#include "libpikawidgets/pikawidgets-private.h"
/**
* SECTION: pikaui
* @title: pikaui
* @short_description: Common user interface functions. This header includes
* all other PIKA User Interface Library headers.
* @see_also: gtk_init(), gdk_set_use_xshm(), gtk_widget_set_default_visual().
*
* Common user interface functions. This header includes all other
* PIKA User Interface Library headers.
**/
/* local function prototypes */
static void pika_ui_help_func (const gchar *help_id,
gpointer help_data);
static void pika_ui_theme_changed (GFileMonitor *monitor,
GFile *file,
GFile *other_file,
GFileMonitorEvent event_type,
GtkCssProvider *css_provider);
static void pika_ensure_modules (void);
#ifndef GDK_WINDOWING_WIN32
static void pika_window_transient_realized (GtkWidget *window,
GdkWindow *parent);
#endif
static gboolean pika_window_set_transient_for (GtkWindow *window,
GdkWindow *parent);
#ifdef GDK_WINDOWING_QUARTZ
static gboolean pika_osx_focus_window (gpointer);
#endif
static gboolean pika_ui_initialized = FALSE;
/* public functions */
/**
* pika_ui_init:
* @prog_name: The name of the plug-in which will be passed as argv[0] to
* gtk_init(). It's a convention to use the name of the
* executable and _not_ the PDB procedure name.
*
* This function initializes GTK+ with gtk_init().
*
* It also sets up various other things so that the plug-in user looks
* and behaves like the PIKA core. This includes selecting the GTK+
* theme and setting up the help system as chosen in the PIKA
* preferences. Any plug-in that provides a user interface should call
* this function.
**/
void
pika_ui_init (const gchar *prog_name)
{
const gchar *display_name;
GtkCssProvider *css_provider;
GFileMonitor *css_monitor;
GFile *file;
g_return_if_fail (prog_name != NULL);
if (pika_ui_initialized)
return;
g_set_prgname (prog_name);
display_name = pika_display_name ();
if (display_name)
{
#if defined (GDK_WINDOWING_X11)
g_setenv ("DISPLAY", display_name, TRUE);
#else
g_setenv ("GDK_DISPLAY", display_name, TRUE);
#endif
}
if (pika_user_time ())
{
/* Construct a fake startup ID as we only want to pass the
* interaction timestamp, see _gdk_windowing_set_default_display().
*/
gchar *startup_id = g_strdup_printf ("_TIME%u", pika_user_time ());
g_setenv ("DESKTOP_STARTUP_ID", startup_id, TRUE);
g_free (startup_id);
}
gtk_init (NULL, NULL);
css_provider = gtk_css_provider_new ();
gtk_style_context_add_provider_for_screen (gdk_screen_get_default (),
GTK_STYLE_PROVIDER (css_provider),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
file = pika_directory_file ("theme.css", NULL);
css_monitor = g_file_monitor (file, G_FILE_MONITOR_NONE, NULL, NULL);
g_object_unref (file);
pika_ui_theme_changed (css_monitor, NULL, NULL, G_FILE_MONITOR_EVENT_CHANGED,
css_provider);
g_signal_connect (css_monitor, "changed",
G_CALLBACK (pika_ui_theme_changed),
css_provider);
g_object_unref (css_provider);
gdk_set_program_class (pika_wm_class ());
if (pika_icon_theme_dir ())
{
file = g_file_new_for_path (pika_icon_theme_dir ());
pika_icons_set_icon_theme (file);
g_object_unref (file);
}
pika_widgets_init (pika_ui_help_func,
pika_context_get_foreground,
pika_context_get_background,
pika_ensure_modules, NULL);
pika_dialogs_show_help_button (pika_show_help_button ());
#ifdef GDK_WINDOWING_QUARTZ
g_idle_add (pika_osx_focus_window, NULL);
#endif
pika_ui_initialized = TRUE;
}
static GdkWindow *
pika_ui_get_foreign_window (guint32 window)
{
#ifdef GDK_WINDOWING_X11
if (GDK_IS_X11_DISPLAY (gdk_display_get_default ()))
return gdk_x11_window_foreign_new_for_display (gdk_display_get_default (),
window);
#endif
#ifdef GDK_WINDOWING_WIN32
return gdk_win32_window_foreign_new_for_display (gdk_display_get_default (),
(HWND) (uintptr_t) window);
#endif
return NULL;
}
/**
* pika_ui_get_display_window:
* @display: a #PikaDisplay.
*
* Returns the #GdkWindow of a display window. The purpose is to allow
* to make plug-in dialogs transient to the image display as explained
* with gdk_window_set_transient_for().
*
* You shouldn't have to call this function directly. Use
* pika_window_set_transient_for_display() instead.
*
* Returns: (nullable) (transfer full): A reference to a #GdkWindow or %NULL.
* You should unref the window using g_object_unref() as
* soon as you don't need it any longer.
*
* Since: 2.4
*/
GdkWindow *
pika_ui_get_display_window (PikaDisplay *display)
{
guint32 window;
g_return_val_if_fail (pika_ui_initialized, NULL);
window = pika_display_get_window_handle (display);
if (window)
return pika_ui_get_foreign_window (window);
return NULL;
}
/**
* pika_ui_get_progress_window:
*
* Returns the #GdkWindow of the window this plug-in's progress bar is
* shown in. Use it to make plug-in dialogs transient to this window
* as explained with gdk_window_set_transient_for().
*
* You shouldn't have to call this function directly. Use
* pika_window_set_transient() instead.
*
* Returns: (transfer full): A reference to a #GdkWindow or %NULL.
* You should unref the window using g_object_unref() as
* soon as you don't need it any longer.
*
* Since: 2.4
*/
GdkWindow *
pika_ui_get_progress_window (void)
{
guint32 window;
g_return_val_if_fail (pika_ui_initialized, NULL);
window = pika_progress_get_window_handle ();
if (window)
return pika_ui_get_foreign_window (window);
return NULL;
}
#ifdef GDK_WINDOWING_QUARTZ
static void
pika_window_transient_show (GtkWidget *window)
{
g_signal_handlers_disconnect_by_func (window,
pika_window_transient_show,
NULL);
[NSApp arrangeInFront: nil];
}
#endif
/**
* pika_window_set_transient_for_display:
* @window: the #GtkWindow that should become transient
* @display: display of the image window that should become the parent
*
* Indicates to the window manager that @window is a transient dialog
* associated with the PIKA image window that is identified by it's
* display ID. See gdk_window_set_transient_for () for more information.
*
* Most of the time you will want to use the convenience function
* pika_window_set_transient().
*
* Since: 2.4
*/
void
pika_window_set_transient_for_display (GtkWindow *window,
PikaDisplay *display)
{
g_return_if_fail (pika_ui_initialized);
g_return_if_fail (GTK_IS_WINDOW (window));
if (! pika_window_set_transient_for (window,
pika_ui_get_display_window (display)))
{
/* if setting the window transient failed, at least set
* WIN_POS_CENTER, which will center the window on the screen
* where the mouse is (see bug #684003).
*/
gtk_window_set_position (window, GTK_WIN_POS_CENTER);
#ifdef GDK_WINDOWING_QUARTZ
g_signal_connect (window, "show",
G_CALLBACK (pika_window_transient_show),
NULL);
#endif
}
}
/**
* pika_window_set_transient:
* @window: the #GtkWindow that should become transient
*
* Indicates to the window manager that @window is a transient dialog
* associated with the PIKA window that the plug-in has been
* started from. See also pika_window_set_transient_for_display().
*
* Since: 2.4
*/
void
pika_window_set_transient (GtkWindow *window)
{
g_return_if_fail (pika_ui_initialized);
g_return_if_fail (GTK_IS_WINDOW (window));
if (! pika_window_set_transient_for (window, pika_ui_get_progress_window ()))
{
/* see above */
gtk_window_set_position (window, GTK_WIN_POS_CENTER);
#ifdef GDK_WINDOWING_QUARTZ
g_signal_connect (window, "show",
G_CALLBACK (pika_window_transient_show),
NULL);
#endif
}
}
/* private functions */
static void
pika_ui_help_func (const gchar *help_id,
gpointer help_data)
{
pika_help (NULL, help_id);
}
static void
pika_ui_theme_changed (GFileMonitor *monitor,
GFile *file,
GFile *other_file,
GFileMonitorEvent event_type,
GtkCssProvider *css_provider)
{
GError *error = NULL;
gchar *contents;
file = pika_directory_file ("theme.css", NULL);
if (g_file_load_contents (file, NULL, &contents, NULL, NULL, &error))
{
gboolean prefer_dark_theme;
prefer_dark_theme = strstr (contents, "/* prefer-dark-theme */") != NULL;
g_object_set (gtk_settings_get_for_screen (gdk_screen_get_default ()),
"gtk-application-prefer-dark-theme", prefer_dark_theme,
NULL);
g_free (contents);
}
else
{
g_printerr ("%s: error loading %s: %s\n", G_STRFUNC,
pika_file_get_utf8_name (file), error->message);
g_clear_error (&error);
}
if (! gtk_css_provider_load_from_file (css_provider, file, &error))
{
g_printerr ("%s: error parsing %s: %s\n", G_STRFUNC,
pika_file_get_utf8_name (file), error->message);
g_clear_error (&error);
}
g_object_unref (file);
}
static void
pika_ensure_modules (void)
{
static PikaModuleDB *module_db = NULL;
if (! module_db)
{
gchar *load_inhibit = pika_get_module_load_inhibit ();
gchar *module_path = pika_pikarc_query ("module-path");
module_db = pika_module_db_new (FALSE);
pika_module_db_set_load_inhibit (module_db, load_inhibit);
pika_module_db_load (module_db, module_path);
g_free (module_path);
g_free (load_inhibit);
}
}
#ifndef GDK_WINDOWING_WIN32
static void
pika_window_transient_realized (GtkWidget *window,
GdkWindow *parent)
{
if (gtk_widget_get_realized (window))
gdk_window_set_transient_for (gtk_widget_get_window (window), parent);
}
#endif
static gboolean
pika_window_set_transient_for (GtkWindow *window,
GdkWindow *parent)
{
gtk_window_set_transient_for (window, NULL);
/* To know why it is disabled on Win32, see
* pika_window_set_transient_for() in app/widgets/pikawidgets-utils.c.
*/
#ifndef GDK_WINDOWING_WIN32
g_signal_handlers_disconnect_matched (window, G_SIGNAL_MATCH_FUNC,
0, 0, NULL,
pika_window_transient_realized,
NULL);
if (! parent)
return FALSE;
if (gtk_widget_get_realized (GTK_WIDGET (window)))
gdk_window_set_transient_for (gtk_widget_get_window (GTK_WIDGET (window)),
parent);
g_signal_connect_object (window, "realize",
G_CALLBACK (pika_window_transient_realized),
parent, 0);
g_object_unref (parent);
return TRUE;
#endif
return FALSE;
}
#ifdef GDK_WINDOWING_QUARTZ
static gboolean
pika_osx_focus_window (gpointer user_data)
{
[NSApp activateIgnoringOtherApps:YES];
return FALSE;
}
#endif
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