gtk--最小化到系统托盘

很多程序都有系统托盘图标,这个在Gtk上可以使用GtkStatusIcon这个构件完成
我们这里简单地测试一个以最小化到系统托盘的程序
当我们点击最小化按钮时程序窗口会消失,然后会在面板上显示我们的图标,当我们点击面板上的图标时会将窗口显示出来
这里除了使用GtkStatusIcon构件外还有另外一个地方需要注意的就是如何捕获窗口的最小化信号
这个信号是window_state_event信号

GdkEventWindowState

typedef struct
{
GdkEventType type;
GdkWindow *window;
gint8 send_event;
GdkWindowState changed_mask;
GdkWindowState new_window_state;
} GdkEventWindowState;
Generated when the state of a toplevel window changes.

GdkEventType type;

the type of the event (GDK_WINDOW_STATE).
GdkWindow *window;

the window which received the event.
gint8 send_event;

TRUE if the event was sent explicitly (e.g. using XSendEvent).
GdkWindowState changed_mask;

mask specifying what flags have changed.
GdkWindowState new_window_state;

the new window state, a combination of GdkWindowState bits.


enum GdkWindowState

typedef enum
{
GDK_WINDOW_STATE_WITHDRAWN = 1 << 0,
GDK_WINDOW_STATE_ICONIFIED = 1 << 1,
GDK_WINDOW_STATE_MAXIMIZED = 1 << 2,
GDK_WINDOW_STATE_STICKY = 1 << 3,
GDK_WINDOW_STATE_FULLSCREEN = 1 << 4,
GDK_WINDOW_STATE_ABOVE = 1 << 5,
GDK_WINDOW_STATE_BELOW = 1 << 6
} GdkWindowState;

Specifies the state of a toplevel window.

GDK_WINDOW_STATE_WITHDRAWN

the window is not shown.
GDK_WINDOW_STATE_ICONIFIED

the window is minimized.
GDK_WINDOW_STATE_MAXIMIZED

the window is maximized.
GDK_WINDOW_STATE_STICKY

the window is sticky.
GDK_WINDOW_STATE_FULLSCREEN

the window is maximized without decorations.
GDK_WINDOW_STATE_ABOVE

the window is kept above other windows.
GDK_WINDOW_STATE_BELOW

the window is kept below other windows.

下面放代码

#include

void tray_on_click(GtkStatusIcon *tray,gpointer data)
{
gtk_widget_show_all(GTK_WIDGET(data));
gtk_window_present(GTK_WINDOW(data));
gtk_status_icon_set_visible(tray,FALSE);
}

void tray_on_menu(GtkStatusIcon *tray,gpointer data)
{
printf("Popup Menu\n");
}

void hide_window(GtkWidget *widget,GdkEventWindowState *event,gpointer data)
{
if(event->changed_mask == GDK_WINDOW_STATE_ICONIFIED && event->new_window_state == GDK_WINDOW_STATE_ICONIFIED)
{
gtk_widget_hide_all(widget);
gtk_status_icon_set_visible(GTK_STATUS_ICON(data),TRUE);
}
}

int main(int argc,char **argv)
{
GtkWidget *win;
GtkStatusIcon *tray;

gtk_init(&argc,&argv);

win=gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_position(GTK_WINDOW(win),GTK_WIN_POS_CENTER);
g_signal_connect(G_OBJECT(win),"delete_event",G_CALLBACK(gtk_main_quit),NULL);

tray=gtk_status_icon_new_from_file("/home/brisk/Pictures/color.png");

//gtk_status_icon_set_from_icon_name(tray,"Test");
gtk_status_icon_set_tooltip_text(tray,"This is Test");
gtk_status_icon_set_visible(tray,FALSE);
g_signal_connect(G_OBJECT(tray),"activate",G_CALLBACK(tray_on_click),win);
g_signal_connect(G_OBJECT(tray),"popup_menu",G_CALLBACK(tray_on_menu),NULL);
g_signal_connect(G_OBJECT(win),"window_state_event",G_CALLBACK(hide_window),tray);

gtk_widget_show_all(win);

gtk_main();
return 0;
}