提取gtk主题背景颜色

Question

I'm almost a gtk newbie, and I'm looking for a way to get the background color for the current theme in gtk. So this code:

GdkColor color = gtk_widget_get_style(mainWindowHandle)->bg[GTK_STATE_NORMAL];

works only after the main window is shown, before returns an strange ugly gray.

Answer 1

Try to attach to the widget's "realize" signal and then grab the style information you want.

static void
widget_realized_cb (GtkWidget *widget) {
  GdkColor *color = NULL;
  GtkStyle *style = gtk_widget_get_style (widget);

  if (style != NULL) {
    color = style->bg[GTK_STATE_NORMAL];

    /* Do whatever you want with it here */
  }
}

void foobar () {
  g_signal_connect (mainWindowHandle,
                    "realize",
                    G_CALLBACK (widget_realized_cb),
                    NULL);
}

Answer 2

I've added a

gtk_widget_realize(mainWindowHandle);

before the gtk_widget_get_style and works perfectly!