c - Gtk 不检测全屏或非全屏窗口

Question

这是我的项目的一部分……我对全屏功能有疑问:

#include "header.h"

gboolean  my_gtk_key_press_event(GtkWidget *widget, GdkEventKey *event, gpointer data)
{
  GdkWindow *window = gtk_widget_get_window(widget);

  GdkWindowState state = gdk_window_get_state(GDK_WINDOW(window));

  switch(event->keyval) {
  case GDK_KEY_F11:
    if(state == GDK_WINDOW_STATE_FULLSCREEN) {
      gtk_window_unfullscreen(GTK_WINDOW(widget));
    }
    else {
      gtk_window_fullscreen(GTK_WINDOW(widget));
    }

    printf("win_state %d\n", state);
    printf("gdk_state %d\n", GDK_WINDOW_STATE_FULLSCREEN);

    break;
  case GDK_KEY_Escape:
    destroy(NULL, NULL);
  break;
  }
}

int main(int argc, char **argv)
{
  GtkWidget *win;
  char *s = "In progress";

  gtk_init(&argc, &argv);

  win = win_principal(win, s, 600, 400, 10);

  g_signal_connect(G_OBJECT(win), "key-press-event", G_CALLBACK(my_gtk_key_press_event), NULL);

  g_signal_connect(G_OBJECT(win), "destroy", G_CALLBACK(destroy), NULL);

  gtk_widget_show_all(win);

  gtk_main();

  return 0;
}

非全屏显示 128 而全屏显示 144而 GDK_WINDOW_STATE_FULLSCREEN 的值等于 16 ...我怎么解决这个问题？或者哪里出了问题？

Answer 1

GDK_WINDOW_STATE_FULLSCREEN 是一个位标志，因此，您不能直接比较状态，而是进行按位运算。

改变:

if (state == GDK_WINDOW_STATE_FULLSCREEN)

收件人:

if (state & GDK_WINDOW_STATE_FULLSCREEN)

这是你的代码，没有依赖:

#include <gtk/gtk.h>

gboolean  my_gtk_key_press_event(GtkWidget *widget, GdkEventKey *event, gpointer data)
{
  GdkWindow *window = gtk_widget_get_window(widget);

  GdkWindowState state = gdk_window_get_state(GDK_WINDOW(window));

  switch(event->keyval) {
  case GDK_KEY_F11:
    if (state & GDK_WINDOW_STATE_FULLSCREEN) {
      gtk_window_unfullscreen(GTK_WINDOW(widget));
    }
    else {
      gtk_window_fullscreen(GTK_WINDOW(widget));
    }
    break;
  case GDK_KEY_Escape:
    gtk_main_quit ();
  break;
  }
}

int main(int argc, char **argv)
{
  GtkWidget *win;
  char *s = "In progress";

  gtk_init(&argc, &argv);

  //win = win_principal(win, s, 600, 400, 10);
  win = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  gtk_window_set_default_size (GTK_WINDOW(win), 640, 400);

  g_signal_connect(G_OBJECT(win), "key-press-event", G_CALLBACK(my_gtk_key_press_event), win);

  g_signal_connect(G_OBJECT(win), "destroy", G_CALLBACK(gtk_main_quit), NULL);

  gtk_widget_show_all(win);

  gtk_main();

  return 0;
}

编译:

gcc -o window window.c `pkg-config --cflags --libs gtk+-3.0`

窗口将通过 F11 切换全屏并通过 Esc 关闭。