寻找GtkWidget的孩子 [英] Finding children of a GtkWidget

问题描述

我需要能够以编程方式探索GTK GUI的结构。我有GtkWidget，我想找到那个小部件的任何孩子。现在我知道GtkContainer有一个可以找到孩子的函数，而且GtkContainer是从GtkWidget派生的。

有没有我可以检查一个小部件是否是GtkContainer，然后执行投？如果没有，有没有其他方法可以发现GtkWidget是我所拥有的孩子的？

是的，那里有是每个GObject类型的宏来检查一个对象是否是这种类型：

  if（GTK_IS_CONTAINER（widget））{
 GList * children = gtk_container_get_children（GTK_CONTAINER（widget））; 
 ... 
} 
  

如果小部件是 GtkBin 它只有一个孩子。在这种情况下，下面比处理 GList 更简单：

  if（GTK_IS_BIN（widget））{
 GtkWidget * child = gtk_bin_get_child（GTK_BIN（widget））; 
 ... 
} 
  

I need to be able to explore a GTK GUI's structure programmatically. I have the GtkWidget and I want to find any children of that widget. Now I know that GtkContainer's have a function to find children and that GtkContainer is derived from GtkWidget.

Is there anyway I can check if a widget is a GtkContainer and then perform the cast? If not, is there any other way I can discover the GtkWidget's that are children of the one I have?

解决方案

Yes, there are macros for every GObject type to check whether an object is of that type:

if(GTK_IS_CONTAINER(widget)) {
    GList *children = gtk_container_get_children(GTK_CONTAINER(widget));
    ...
}

If the widget is a GtkBin it has only one child. In that case, the following is simpler than dealing with a GList:

if(GTK_IS_BIN(widget)) {
    GtkWidget *child = gtk_bin_get_child(GTK_BIN(widget));
    ...
}

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