我正在尝试为xfce4面板编写插件。它应该显示带有复杂容器（如GtkBox）的弹出窗口。
我在vala中的代码是：
using Xfce;
public class ButtonPlugin : Xfce.PanelPlugin {
private Gtk.MenuButton button;
private Gtk.Popover popover;
public override void @construct () {
button = new Gtk.MenuButton();
popover = new Gtk.Popover(button);
button.set_image(
new Gtk.Image.from_icon_name (
"open-menu-symbolic",
Gtk.IconSize.LARGE_TOOLBAR
)
);
var menu_container = new Gtk.Box(Gtk.Orientation.VERTICAL, 0);
menu_container.pack_start(new Gtk.Label("Hello World 1"));
menu_container.pack_start(new Gtk.Label("Hello World 2"));
menu_container.pack_start(new Gtk.Label("Hello World 3"));
popover.add(menu_container);
popover.show_all ();
popover.hide();
button.popover = popover;
add (button);
//button.show ();
add_action_widget (button);
save.connect (() => { message ("save yourself"); });
free_data.connect (() => { message ("free yourself"); });
size_changed.connect (() => { message ("panel size changed"); return false; });
menu_show_about ();
about.connect (() => {
Gtk.show_about_dialog (null,
"program-name", "Button",
"comments", "Test plugin for the Xfce 4.14 Panel",
null);
});
destroy.connect (() => { Gtk.main_quit (); });
show_all();
}
}
[ModuleInit]
public Type xfce_panel_module_init (TypeModule module) {
return typeof (ButtonPlugin);
}
该插件已启动，但单击时不显示弹出窗口。
是否可以使用Popover，还是应该切换到另一个小部件？
答案 0 :(得分：1)
据我了解，不，弹出窗口在Xfce面板插件中不起作用。
看看这个要点：https://gist.github.com/andreldm/83c9b99e7aa133c924fb4165acc8427a
独立应用程序正确显示了弹出窗口，但是请尝试将窗口缩小到按钮一样小，没有足够的空间容纳弹出窗口，这在面板插件中也是同样的问题。如果我没记错的话，上下文菜单会起作用，因为它们是全新的窗口，而弹出窗口却不是。
在同一要点上，您可以找到与xfce4-sample-plugin的差异，其代码类似于您尝试的代码。
答案 1 :(得分：1)
Popover不能用作独立菜单。 它没有自己的窗口。 必须有一个窗口，并且必须将弹出窗口附加到小部件。 假设虚拟小部件为1x1像素的透明图像。 这是C语言中的一个独立的弹出窗口。
#include <gtk/gtk.h>
/* save this file as standalone-popover.c
create a 1x1 pixel transparent png image in the same folder
and name it dummy.png
compile with:
gcc standalone-popover.c -o standalone-popover `pkg-config --cflags --libs gtk+-3.0`
*/
#define DUMMY_PNG "dummy.png"
void destroy(GtkWidget* widget, gpointer data)
{
gtk_main_quit();
}
int main(int argc, char* argv[])
{
GtkWidget *window;
GtkWidget *popover;
GtkWidget *dummy_png_top_left;
GtkWidget *dummy_png_top_center;
GtkWidget *dummy_png_top_right;
GtkWidget *box;
GtkWidget *dummy_box_top;
GtkWidget *label;
GtkWidget *button;
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_type_hint (GTK_WINDOW(window),
GDK_WINDOW_TYPE_HINT_POPUP_MENU);
gtk_widget_set_size_request(window, 250, 220);
gtk_window_set_resizable (GTK_WINDOW(window), TRUE);
gtk_window_set_keep_above (GTK_WINDOW (window), TRUE);
gtk_window_stick (GTK_WINDOW (window));
gtk_window_set_decorated (GTK_WINDOW(window), FALSE);
gtk_window_set_skip_taskbar_hint (GTK_WINDOW (window), TRUE);
gtk_widget_set_events (window, GDK_FOCUS_CHANGE_MASK);
g_signal_connect(window, "destroy",
G_CALLBACK(destroy), NULL);
g_signal_connect (G_OBJECT (GTK_WINDOW (window)),
"focus-out-event",
G_CALLBACK (destroy),
NULL);
gtk_window_present (GTK_WINDOW(window));
gtk_container_set_border_width(GTK_CONTAINER(window), 20);
dummy_png_top_left = gtk_image_new_from_file (DUMMY_PNG);
dummy_png_top_center = gtk_image_new_from_file (DUMMY_PNG);
dummy_png_top_right = gtk_image_new_from_file (DUMMY_PNG);
dummy_box_top = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_box_set_homogeneous (GTK_BOX (dummy_box_top), TRUE);
gtk_box_pack_start (GTK_BOX(dummy_box_top), dummy_png_top_left, TRUE, FALSE, 0);
gtk_box_pack_start (GTK_BOX(dummy_box_top), dummy_png_top_center, TRUE, FALSE, 0);
gtk_box_pack_start (GTK_BOX(dummy_box_top), dummy_png_top_right, TRUE, FALSE, 0);
box = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);
gtk_box_set_homogeneous (GTK_BOX (box), TRUE);
gtk_widget_show(dummy_png_top_left);
gtk_widget_show(dummy_png_top_center);
gtk_widget_show(dummy_png_top_right);
label = gtk_label_new ("Standalone GtkPopover");
button = gtk_button_new_with_label("OK");
gtk_box_pack_start (GTK_BOX(box), dummy_box_top, TRUE, TRUE, 0);
gtk_box_pack_start (GTK_BOX(box), label, TRUE, FALSE, 10);
gtk_box_pack_start (GTK_BOX(box), button, TRUE, FALSE, 10);
/* here we use the dummy widget to position the popover arrows */
popover = gtk_popover_new(dummy_png_top_center);
gtk_container_add(GTK_CONTAINER(window), popover);
gtk_container_add(GTK_CONTAINER(popover), box);
gtk_popover_set_modal(GTK_POPOVER(popover), FALSE);
g_signal_connect(G_OBJECT(button),
"clicked",
G_CALLBACK(destroy),
window);
gtk_widget_show_all(window);
/* need this to focus a window */
gtk_window_present_with_time(GTK_WINDOW(window),GDK_CURRENT_TIME);
gtk_window_activate_focus (GTK_WINDOW (window));
gtk_widget_grab_focus(GTK_WIDGET(window));
gtk_main();
return 0;
}
增加更多复杂性的是箭头。 您必须计算将窗口放置在面板插件按钮旁边的位置。 在此之上，您必须正确定位看起来不太容易的箭头。
https://www.youtube.com/watch?v=eXZzwDDQlZ8
根据面板的方向和插件在屏幕上的位置，也许在弹出框周围放置8个或更多的虚拟图像并指向它们。
视频中的代码：
/*
* Copyright © 2020 misko_2083
*
* Distributed under terms of the GPL2 license.
*
* Compile:
* gcc -Wall -s -shared -fPIC -g desktop-icons-applet.c -o desktop-icons-applet $(pkg-config --libs --cflags gtk+-3.0 libxfce4panel-2.0 libxfconf-0)
* move to lib dir (Debian 64bit here):
* mv libdicons.so /usr/lib/x86_64-linux-gnu/xfce4/panel/plugins/libdicons.so
*/
#include <libxfce4util/libxfce4util.h>
#include <libxfce4panel/xfce-panel-plugin.h>
#include <xfconf/xfconf.h>
#define DEFAULT_ICON_NAME "emblem-desktop"
#define DEFAULT_TOOLTIP_MESSAGE "Show/Hide Desktop Icons"
#define DEFAULT_TITLE "dicons"
#define XFCE_PLUGIN_VERSION "0.1"
/* change the path here to a 1 pixel transparent png */
#define DUMMY_PNG "/home/misko/Desktop/null.png"
typedef struct _DiconsPlugin {
XfcePanelPlugin *plugin;
GtkWidget *button;
GtkWidget *icon;
GtkWidget *window;
GtkWidget *popover;
GtkWidget *dummy_png_top_left;
GtkWidget *dummy_png_top_center;
GtkWidget *dummy_png_top_right;
GtkWidget *dummy_png_bottom_left;
GtkWidget *dummy_png_bottom_center;
GtkWidget *dummy_png_bottom_right;
gchar *icon_name;
} DiconsPlugin;
static void
button_clicked (GtkWidget *button,
DiconsPlugin *dicons);
static gboolean
on_popup_focus_out (GtkWidget *widget,
GdkEventFocus *event,
gpointer data);
static gboolean
on_key_pressed (GtkWidget *widget,
GdkEventKey *event,
gpointer data);
static const char dicons_plugin_copyright[] =
"Copyright \xc2\xa9 2020 Miloš Pavlović\n";
static void dicons_about(XfcePanelPlugin *plugin)
{
const gchar *auth[] = { "Miloš Pavlović", NULL };
GdkPixbuf *icon;
icon = xfce_panel_pixbuf_from_source("emblem-desktop", NULL, 32);
gtk_show_about_dialog(NULL,
"logo", icon,
"license", xfce_get_license_text(XFCE_LICENSE_TEXT_GPL),
"version", XFCE_PLUGIN_VERSION,
"program-name", "dicons-applet",
"comments", _("Opens a configuration menu for desktop icons"),
"website", "https://github.com/Misko-2083",
"copyright", _(dicons_plugin_copyright),
"authors", auth,
NULL);
if (icon)
g_object_unref(G_OBJECT(icon));
}
static void
_quit_cb (GtkWidget *button, GtkWidget *window, gpointer data)
{
(void)data; /* Avoid compiler warnings */
gtk_widget_hide (window);
gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(button), FALSE);
return;
}
static gboolean
on_popup_focus_out (GtkWidget *widget,
GdkEventFocus *event,
gpointer data)
{
gtk_widget_hide (widget);
gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(data), FALSE);
return TRUE;
}
static gboolean
on_key_pressed (GtkWidget *widget,
GdkEventKey *event,
gpointer data)
{
if (event->keyval == GDK_KEY_Escape){
gtk_widget_hide (widget);
gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(data), FALSE);
return TRUE;
}
return FALSE;
}
static gboolean
on_switch_home (GtkWidget *widget,
gboolean *state,
gpointer user_data)
{
XfconfChannel *channel;
xfconf_init(NULL);
channel = xfconf_channel_get("xfce4-desktop");
if (state)
xfconf_channel_set_bool(channel, "/desktop-icons/file-icons/show-home", TRUE);
else
xfconf_channel_set_bool(channel, "/desktop-icons/file-icons/show-home", FALSE);
xfconf_shutdown();
return FALSE;
}
static gboolean
on_switch_trash (GtkWidget *widget,
gboolean *state,
gpointer user_data)
{
XfconfChannel *channel;
xfconf_init(NULL);
channel = xfconf_channel_get("xfce4-desktop");
if (state)
xfconf_channel_set_bool(channel, "/desktop-icons/file-icons/show-trash", TRUE);
else
xfconf_channel_set_bool(channel, "/desktop-icons/file-icons/show-trash", FALSE);
xfconf_shutdown();
return FALSE;
}
static gboolean
on_switch_filesystem (GtkWidget *widget,
gboolean *state,
gpointer user_data)
{
XfconfChannel *channel;
xfconf_init(NULL);
channel = xfconf_channel_get("xfce4-desktop");
if (state)
xfconf_channel_set_bool(channel, "/desktop-icons/file-icons/show-filesystem", TRUE);
else
xfconf_channel_set_bool(channel, "/desktop-icons/file-icons/show-filesystem", FALSE);
xfconf_shutdown();
return FALSE;
}
static gboolean
on_switch_removable (GtkWidget *widget,
gboolean *state,
gpointer user_data)
{
XfconfChannel *channel;
xfconf_init(NULL);
channel = xfconf_channel_get("xfce4-desktop");
if (state)
xfconf_channel_set_bool(channel, "/desktop-icons/file-icons/show-removable", TRUE);
else
xfconf_channel_set_bool(channel, "/desktop-icons/file-icons/show-removable", FALSE);
xfconf_shutdown();
return FALSE;
}
static gboolean dicons_size_changed (XfcePanelPlugin *plugin,
gint size,
DiconsPlugin *dicons)
{
XfceScreenPosition position;
position = xfce_panel_plugin_get_screen_position(plugin);
if (xfce_screen_position_is_horizontal(position)) {
/* horizontal */
if (xfce_screen_position_is_top(position)) {
/* top panel position */
gtk_popover_set_relative_to(GTK_POPOVER(dicons->popover), dicons->dummy_png_top_left);
}
if (xfce_screen_position_is_bottom(position)) {
/* bottom */
gtk_popover_set_relative_to(GTK_POPOVER(dicons->popover), dicons->dummy_png_bottom_left);
}
if (xfce_screen_position_is_floating(position)) {
/* floating */
gtk_popover_set_relative_to(GTK_POPOVER(dicons->popover), dicons->dummy_png_top_left);
/* TO DO: check if the button is in the top or bottom side
* of the screen and set the correct dummy widget
*/
}
} else {
/* vertical */
if (xfce_screen_position_is_left(position)) {
/* left */
gtk_popover_set_relative_to(GTK_POPOVER(dicons->popover), dicons->dummy_png_top_left);
}
if (xfce_screen_position_is_right(position)) {
/* right */
gtk_popover_set_relative_to(GTK_POPOVER(dicons->popover), dicons->dummy_png_top_left);
}
if (xfce_screen_position_is_floating(position)) {
/* floating */
gtk_popover_set_relative_to(GTK_POPOVER(dicons->popover), dicons->dummy_png_bottom_left);
/* TO DO: check if the button is in the left or right side
* of the screen and set the correct dummy widget
*/
}
}
size = size / xfce_panel_plugin_get_nrows(plugin);
gtk_widget_set_size_request (GTK_WIDGET (plugin), size, size);
return TRUE;
}
static void button_clicked(GtkWidget *button,
DiconsPlugin *dicons)
{
gint x, y;
if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(dicons->button)))
{
dicons_size_changed(dicons->plugin, xfce_panel_plugin_get_size (dicons->plugin), dicons);
xfce_panel_plugin_block_autohide(dicons->plugin, TRUE);
if (GTK_IS_TOGGLE_BUTTON (button)) {
xfce_panel_plugin_position_widget(XFCE_PANEL_PLUGIN (dicons->plugin),
GTK_WIDGET(dicons->window),
button, &x, &y);
} else {
GdkDisplay *display = gdk_display_get_default();
GdkSeat *seat = gdk_display_get_default_seat(display);
GdkDevice *device = gdk_seat_get_pointer(seat);
gdk_window_get_device_position(gdk_get_default_root_window(),
device, &x, &y, NULL);
}
gtk_popover_popup(GTK_POPOVER(dicons->popover));
gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(dicons->button), TRUE);
if (!gtk_widget_get_mapped(dicons->window))
gtk_widget_show_all(GTK_WIDGET(dicons->window));
gtk_window_move (GTK_WINDOW(dicons->window), x, y);
/* fix me: this function is called twice */
} else {
_quit_cb(dicons->button, dicons->window, NULL);
if (GTK_IS_TOGGLE_BUTTON (button))
gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(button), FALSE);
xfce_panel_plugin_block_autohide(dicons->plugin, FALSE);
gtk_popover_popdown(GTK_POPOVER(dicons->popover));
}
}
static DiconsPlugin *dicons_init(XfcePanelPlugin *plugin)
{
GtkWidget *box;
GtkWidget *box_a;
GtkWidget *box_b;
GtkWidget *boxl;
GtkWidget *about_button;
GtkWidget *cancel_button;
GtkWidget *question;
GtkWidget *label_home;
GtkWidget *label_trash;
GtkWidget *label_filesystem;
GtkWidget *label_removable;
GtkWidget *image;
GtkWidget *switch_home;
GtkWidget *switch_trash;
GtkWidget *switch_filesystem;
GtkWidget *switch_removable;
GdkWindow *pwindow;
GtkWidget *dummy_box_top;
GtkWidget *dummy_box_bottom;
XfconfChannel *channel;
DiconsPlugin *dicons = g_slice_new0(DiconsPlugin);
dicons->plugin = plugin;
dicons->icon_name = g_strdup(DEFAULT_ICON_NAME);
dicons->button = xfce_panel_create_toggle_button();
xfce_panel_plugin_add_action_widget (XFCE_PANEL_PLUGIN (dicons->plugin),
dicons->button);
gtk_init(NULL, NULL);
dicons->window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_type_hint (GTK_WINDOW(dicons->window),
GDK_WINDOW_TYPE_HINT_POPUP_MENU);
gtk_widget_set_size_request(dicons->window, 250, 220);
gtk_window_set_resizable (GTK_WINDOW(dicons->window), TRUE);
gtk_window_set_keep_above (GTK_WINDOW (dicons->window), TRUE);
gtk_window_stick (GTK_WINDOW (dicons->window));
gtk_window_set_skip_taskbar_hint (GTK_WINDOW (dicons->window), TRUE);
gtk_window_set_title (GTK_WINDOW (dicons->window), "Desktop Icons");
gtk_widget_set_events (dicons->window, GDK_FOCUS_CHANGE_MASK);
g_signal_connect (G_OBJECT (GTK_WINDOW (dicons->window)),
"focus-out-event",
G_CALLBACK (on_popup_focus_out),
dicons->button);
gtk_widget_set_events (GTK_WIDGET(dicons->window), GDK_KEY_PRESS_MASK);
g_signal_connect (G_OBJECT (GTK_WINDOW (dicons->window)),
"key-press-event",
G_CALLBACK (on_key_pressed),
dicons->button);
box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
box_a = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
box_b = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 2);
boxl = gtk_box_new (GTK_ORIENTATION_VERTICAL, 2);
gtk_box_set_homogeneous (GTK_BOX (box), TRUE);
image = gtk_image_new_from_icon_name (dicons->icon_name,
GTK_ICON_SIZE_DND);
question = gtk_label_new ("\nDesktop Icons");
label_home = gtk_label_new ("Home");
label_trash = gtk_label_new ("Trash");
label_filesystem = gtk_label_new ("Filesystem");
label_removable = gtk_label_new ("Removable");
switch_home = gtk_switch_new ();
switch_trash = gtk_switch_new ();
switch_filesystem = gtk_switch_new ();
switch_removable = gtk_switch_new ();
g_signal_connect (G_OBJECT (switch_home),
"state-set",
G_CALLBACK (on_switch_home),
NULL);
g_signal_connect (G_OBJECT (switch_trash),
"state-set",
G_CALLBACK (on_switch_trash),
NULL);
g_signal_connect (G_OBJECT (switch_filesystem),
"state-set",
G_CALLBACK (on_switch_filesystem),
NULL);
g_signal_connect (G_OBJECT (switch_removable),
"state-set",
G_CALLBACK (on_switch_removable),
NULL);
xfconf_init(NULL);
channel = xfconf_channel_get("xfce4-desktop");
/* set initial switches */
if (xfconf_channel_get_bool(channel, "/desktop-icons/file-icons/show-home", TRUE))
gtk_switch_set_state (GTK_SWITCH(switch_home), TRUE);
else
gtk_switch_set_state (GTK_SWITCH(switch_home), FALSE);
if (xfconf_channel_get_bool(channel, "/desktop-icons/file-icons/show-trash", TRUE))
gtk_switch_set_state (GTK_SWITCH(switch_trash), TRUE);
else
gtk_switch_set_state (GTK_SWITCH(switch_trash), FALSE);
if (xfconf_channel_get_bool(channel, "/desktop-icons/file-icons/show-filesystem", TRUE))
gtk_switch_set_state (GTK_SWITCH(switch_filesystem), TRUE);
else
gtk_switch_set_state (GTK_SWITCH(switch_filesystem), FALSE);
if (xfconf_channel_get_bool(channel, "/desktop-icons/file-icons/show-removable", TRUE))
gtk_switch_set_state (GTK_SWITCH(switch_removable), TRUE);
else
gtk_switch_set_state (GTK_SWITCH(switch_removable), FALSE);
xfconf_shutdown();
dicons->dummy_png_top_left = gtk_image_new_from_file (DUMMY_PNG);
dicons->dummy_png_top_center = gtk_image_new_from_file (DUMMY_PNG);
dicons->dummy_png_top_right = gtk_image_new_from_file (DUMMY_PNG);
dummy_box_top = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_box_pack_start (GTK_BOX(dummy_box_top), dicons->dummy_png_top_left, TRUE, FALSE, 0);
gtk_box_pack_start (GTK_BOX(dummy_box_top), dicons->dummy_png_top_center, TRUE, FALSE, 0);
gtk_box_pack_start (GTK_BOX(dummy_box_top), dicons->dummy_png_top_right, TRUE, FALSE, 0);
dicons->dummy_png_bottom_left = gtk_image_new_from_file (DUMMY_PNG);
dicons->dummy_png_bottom_center = gtk_image_new_from_file (DUMMY_PNG);
dicons->dummy_png_bottom_right = gtk_image_new_from_file (DUMMY_PNG);
dummy_box_bottom = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_box_pack_start (GTK_BOX(dummy_box_bottom), dicons->dummy_png_bottom_left, TRUE, FALSE, 0);
gtk_box_pack_start (GTK_BOX(dummy_box_bottom), dicons->dummy_png_bottom_center, TRUE, FALSE, 0);
gtk_box_pack_start (GTK_BOX(dummy_box_bottom), dicons->dummy_png_bottom_right, TRUE, FALSE, 0);
gtk_widget_show(dicons->dummy_png_top_left);
gtk_widget_show(dicons->dummy_png_top_center);
gtk_widget_show(dicons->dummy_png_top_right);
gtk_widget_show(dicons->dummy_png_bottom_left);
gtk_widget_show(dicons->dummy_png_bottom_center);
gtk_widget_show(dicons->dummy_png_bottom_right);
dicons->popover = gtk_popover_new(dicons->dummy_png_top_left);
gtk_popover_set_constrain_to(GTK_POPOVER(dicons->popover), GTK_POPOVER_CONSTRAINT_NONE);
/* modal blocks the panel preferences process,
* it needs to be set to FALSE */
gtk_popover_set_modal(GTK_POPOVER(dicons->popover), FALSE);
gtk_container_add(GTK_CONTAINER(dicons->window), dicons->popover);
gtk_container_add(GTK_CONTAINER(dicons->popover), boxl);
gtk_box_pack_start (GTK_BOX(box_a), label_home, TRUE, TRUE, 10);
gtk_box_pack_start (GTK_BOX(box_a), switch_home, FALSE, TRUE, 10);
gtk_box_pack_start (GTK_BOX(box_a), label_trash, TRUE, TRUE, 10);
gtk_box_pack_start (GTK_BOX(box_a), switch_trash, FALSE, TRUE, 10);
gtk_box_pack_start (GTK_BOX(box_b), label_filesystem, TRUE, TRUE, 10);
gtk_box_pack_start (GTK_BOX(box_b), switch_filesystem, FALSE, TRUE, 10);
gtk_box_pack_start (GTK_BOX(box_b), label_removable, TRUE, TRUE, 10);
gtk_box_pack_start (GTK_BOX(box_b), switch_removable, FALSE, TRUE, 10);
about_button = gtk_button_new_with_label("About");
cancel_button = gtk_button_new_with_label("Cancel");
g_signal_connect(G_OBJECT(cancel_button),
"clicked",
G_CALLBACK(_quit_cb),
dicons->window);
g_signal_connect(G_OBJECT(about_button),
"clicked",
G_CALLBACK(dicons_about),
plugin);
gtk_box_pack_start (GTK_BOX(boxl), dummy_box_top, TRUE, TRUE, 0);
gtk_box_pack_start (GTK_BOX(boxl), image, TRUE, TRUE, 0);
gtk_box_pack_start (GTK_BOX(boxl), question, TRUE, TRUE, 0);
gtk_box_pack_start (GTK_BOX(boxl), box_a, FALSE, TRUE, 5);
gtk_box_pack_start (GTK_BOX(boxl), box_b, FALSE, TRUE, 5);
gtk_box_pack_start (GTK_BOX(box), about_button, TRUE, TRUE, 10);
gtk_box_pack_start (GTK_BOX (box), cancel_button, TRUE, TRUE, 10);
gtk_box_pack_start (GTK_BOX(boxl), box, TRUE, TRUE, 10);
gtk_box_pack_end (GTK_BOX(boxl), dummy_box_bottom, TRUE, TRUE, 0);
gtk_window_set_decorated (GTK_WINDOW(dicons->window), FALSE);
gtk_widget_show(dicons->button);
/*gtk_window_set_attached_to(GTK_WINDOW(dicons->window),
dicons->button);*/
pwindow = gtk_widget_get_parent_window(dicons->button);
gtk_window_set_transient_for(GTK_WINDOW(dicons->window),
GTK_WINDOW(pwindow));
g_signal_connect(G_OBJECT(dicons->button), "toggled",
G_CALLBACK(button_clicked), dicons);
gtk_widget_set_tooltip_text (GTK_WIDGET(dicons->button),
DEFAULT_TOOLTIP_MESSAGE);
dicons->icon = xfce_panel_image_new_from_source(dicons->icon_name);
gtk_widget_show(dicons->icon);
gtk_container_add(GTK_CONTAINER(dicons->button), dicons->icon);
return dicons;
}
static void dicons_free(XfcePanelPlugin *plugin, DiconsPlugin *dicons)
{
gtk_widget_destroy(dicons->button);
gtk_widget_destroy(dicons->icon);
if (GTK_IS_WIDGET (dicons->window))
gtk_widget_destroy(dicons->window);
if (GTK_IS_WIDGET (dicons->popover))
gtk_widget_destroy(dicons->popover);
g_slice_free(DiconsPlugin, dicons);
}
static void set_button_active (GtkToggleButton *button)
{
if (GTK_IS_TOGGLE_BUTTON(button)) {
if (!gtk_toggle_button_get_active(button)) {
gtk_toggle_button_set_active(button, TRUE);
}
else
{
gtk_toggle_button_set_active(button, FALSE);
}
}
}
static gboolean dicons_remote (XfcePanelPlugin *plugin,
gchar *name,
GValue *value,
DiconsPlugin *dicons)
{
g_return_val_if_fail (value == NULL || G_IS_VALUE (value), FALSE);
if (strcmp (name, "popup") == 0
&& !gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(dicons->button))
&& gtk_widget_get_visible (GTK_WIDGET (plugin)) )
{
if (value != NULL
&& G_VALUE_HOLDS_BOOLEAN (value)
&& g_value_get_boolean (value))
{
set_button_active(GTK_TOGGLE_BUTTON(dicons->button));
/* popup here at mouse pointer , where X is an internal id
* xfce4-panel --plugin-event=desktop-icons-applet-X:popup:bool:true
*/
button_clicked(NULL, dicons);
}
else
{
set_button_active(GTK_TOGGLE_BUTTON(dicons->button));
/* popup here, where X is an internal id
* xfce4-panel --plugin-event=desktop-icons-applet-X:popup:bool:false
*/
button_clicked(dicons->button, dicons);
}
return TRUE;
}
return FALSE;
}
static void dicons_construct(XfcePanelPlugin *plugin)
{
DiconsPlugin *dicons;
dicons = dicons_init(plugin);
gtk_container_add(GTK_CONTAINER(plugin), dicons->button);
xfce_panel_plugin_add_action_widget(plugin, dicons->button);
xfce_panel_plugin_menu_show_about(plugin);
g_signal_connect (G_OBJECT(plugin),
"free-data",
G_CALLBACK(dicons_free), dicons);
g_signal_connect (G_OBJECT(plugin),
"size-changed",
G_CALLBACK(dicons_size_changed), dicons);
g_signal_connect (G_OBJECT (plugin),
"remote-event",
G_CALLBACK(dicons_remote), dicons);
g_signal_connect (G_OBJECT (plugin),
"about",
G_CALLBACK (dicons_about), dicons);
}
XFCE_PANEL_PLUGIN_REGISTER(dicons_construct);
和桌面文件 /usr/share/xfce4/panel/plugins/desktop-icons-applet.desktop
[Xfce Panel]
Type=X-XFCE-PanelPlugin
Encoding=UTF-8
Name=Desktop Icons
Comment=Show and Hide desktop icons
Icon=emblem-desktop
X-XFCE-Module=dicons
X-XFCE-Internal=true
X-XFCE-Unique=false
X-XFCE-API=2.0