当用户在窗口外单击时,如何隐藏Gtk弹出窗口

Question

我在C中使用GTK +和glade工具开发了一个弹出窗口(非装饰).当单击一个按钮时,它会在其父窗口中弹出.我想在用户点击此窗口时销毁或隐藏此弹出窗口.用户可以单击父窗口或任何其他窗口.我试图捕获GDK_FOCUS_CHANGE事件,但我无法捕获此事件.有没有办法实现这个目标？我怎么知道点击是在其他窗口然后弹出窗口？怎么清楚弹出窗口已经失去了它的焦点？所以我可以隐藏它.相关代码如下:

/*
 * Compile me with:

 gcc -o popup popup.c $(pkg-config --cflags --libs gtk+-2.0 gmodule-2.0)
*/

#include <gtk/gtk.h>

static void on_popup_clicked (GtkButton*, GtkWidget*);
static gboolean on_popup_window_event(GtkWidget*, GdkEventExpose*);

int main (int argc, char *argv[])
{
    GtkWidget *window, *button, *vbox;

    gtk_init (&argc, &argv);

    window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title (GTK_WINDOW (window), "Parent window");
    gtk_container_set_border_width (GTK_CONTAINER (window), 10);
    gtk_widget_set_size_request (window, 300, 300);
    gtk_window_set_position (GTK_WINDOW (window),GTK_WIN_POS_CENTER);

    button = gtk_button_new_with_label("Pop Up");
    g_signal_connect (G_OBJECT (button), "clicked",G_CALLBACK (on_popup_clicked),(gpointer) window);

    vbox = gtk_vbox_new (FALSE, 3);
    gtk_box_pack_end(GTK_BOX (vbox), button, FALSE, FALSE, 5);
    gtk_container_add (GTK_CONTAINER (window), vbox);

    gtk_widget_show_all (window);
    gtk_main ();
    return 0;
}

void on_popup_clicked (GtkButton* button, GtkWidget* pWindow)
{
    GtkWidget *popup_window;
    popup_window = gtk_window_new (GTK_WINDOW_POPUP);
    gtk_window_set_title (GTK_WINDOW (popup_window), "Pop Up window");
    gtk_container_set_border_width (GTK_CONTAINER (popup_window), 10);
    gtk_window_set_resizable(GTK_WINDOW (popup_window), FALSE);
    gtk_window_set_decorated(GTK_WINDOW (popup_window), FALSE);
    gtk_widget_set_size_request (popup_window, 150, 150);
    gtk_window_set_transient_for(GTK_WINDOW (popup_window),GTK_WINDOW (pWindow));
    gtk_window_set_position (GTK_WINDOW (popup_window),GTK_WIN_POS_CENTER);
    g_signal_connect (G_OBJECT (button), "event",
                        G_CALLBACK (on_popup_window_event),NULL);

    GdkColor color;
    gdk_color_parse("#3b3131", &color);
    gtk_widget_modify_bg(GTK_WIDGET(popup_window), GTK_STATE_NORMAL, &color);


    gtk_widget_show_all (popup_window);
}

gboolean on_popup_window_event(GtkWidget *popup_window, GdkEventExpose *event)
{
    if(event->type == GDK_FOCUS_CHANGE)
        gtk_widget_hide (popup_window);

    return FALSE;
}

在用户单击父窗口或其他窗口时,我无法隐藏此弹出窗口.我怎样才能做到这一点？

我必须坚持使用Gtk + 2.14版本.

Answer 1

变化:

• 切换GTK_WINDOW_POPUP到GTK_WINDOW_TOPLEVEL,反直觉,但我无法弄清楚如何让弹出窗口接受焦点.
• 添加gtk_window提示以防止弹出窗口显示在任务栏和寻呼​​机中
• 故意将焦点放在弹出窗口上
• 设置GDK_FOCUS_CHANGE_MASK在GDK_WINDOW与gtk_widget_set_events(用于下一步骤)
• 连接到focus-out-event弹出窗口
• 更改信号处理程序以处理不同的信号

我还建议阅读GTK +源代码,了解它在显示时如何处理工具提示和菜单的弹出窗口......但是这些通常是基于鼠标移出范围而不是弹出失去焦点本身而被破坏的.

#include 

static void on_popup_clicked (GtkButton*, GtkWidget*);
gboolean on_popup_focus_out (GtkWidget*, GdkEventFocus*, gpointer);

int
main (int argc, char *argv[])
{
  GtkWidget *window, *button, *vbox;

  gtk_init (&argc, &argv);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title (GTK_WINDOW (window), "Parent window");
  gtk_container_set_border_width (GTK_CONTAINER (window), 10);
  gtk_widget_set_size_request (window, 300, 300);
  gtk_window_set_position (GTK_WINDOW (window), GTK_WIN_POS_CENTER);

  button = gtk_button_new_with_label ("Pop Up");
  g_signal_connect (G_OBJECT (button),
                    "clicked",
                    G_CALLBACK (on_popup_clicked),
                    (gpointer) window);

  vbox = gtk_vbox_new (FALSE, 3);
  gtk_box_pack_end (GTK_BOX (vbox), button, FALSE, FALSE, 5);
  gtk_container_add (GTK_CONTAINER (window), vbox);

  gtk_widget_show_all (window);
  gtk_main ();
  return 0;
}

void
on_popup_clicked (GtkButton* button, GtkWidget* pWindow)
{
  GtkWidget *popup_window;

  popup_window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title (GTK_WINDOW (popup_window), "Pop Up window");
  gtk_container_set_border_width (GTK_CONTAINER (popup_window), 10);
  gtk_window_set_resizable (GTK_WINDOW (popup_window), FALSE);
  gtk_window_set_decorated (GTK_WINDOW (popup_window), FALSE);
  gtk_window_set_skip_taskbar_hint (GTK_WINDOW (popup_window), TRUE);
  gtk_window_set_skip_pager_hint (GTK_WINDOW (popup_window), TRUE);
  gtk_widget_set_size_request (popup_window, 150, 150);
  gtk_window_set_transient_for (GTK_WINDOW (popup_window), GTK_WINDOW (pWindow));
  gtk_window_set_position (GTK_WINDOW (popup_window), GTK_WIN_POS_CENTER);

  gtk_widget_set_events (popup_window, GDK_FOCUS_CHANGE_MASK);
  g_signal_connect (G_OBJECT (popup_window),
                    "focus-out-event",
                    G_CALLBACK (on_popup_focus_out),
                    NULL);

  GdkColor color;
  gdk_color_parse ("#3b3131", &color);
  gtk_widget_modify_bg (GTK_WIDGET (popup_window), GTK_STATE_NORMAL, &color);

  gtk_widget_show_all (popup_window);
  gtk_widget_grab_focus (popup_window);
}

gboolean
on_popup_focus_out (GtkWidget *widget,
                    GdkEventFocus *event,
                    gpointer data)
{
  gtk_widget_destroy (widget);
  return TRUE;
}