linux 下的GTK+图形编程问题！

xiafeng

GTK＋图形编程中怎么刷新图形？有没有专门的刷新函数？

kys2002

我也正在郁闷中

xiafeng

难道是同路人？
有情况站内联系哈
两个人总比一个人强～

dzho002

摘自gtk+-2.0文档

gtk_widget_queue_draw_area ()
void        gtk_widget_queue_draw_area      (GtkWidget *widget,
                                             gint x,
                                             gint y,
                                             gint width,
                                             gint height);


Invalidates the rectangular area of widget defined by x, y, width and height by calling gdk_window_invalidate_rect() on the widget's window and all its child windows. Once the main loop becomes idle (after the current batch of events has been processed, roughly), the window will receive expose events for the union of all regions that have been invalidated.

Normally you would only use this function in widget implementations. You might also use it, or gdk_window_invalidate_rect() directly, to schedule a redraw of a GtkDrawingArea or some portion thereof.

Frequently you can just call gdk_window_invalidate_rect() or gdk_window_invalidate_region() instead of this function. Those functions will invalidate only a single window, instead of the widget and all its children.

The advantage of adding to the invalidated region compared to simply drawing immediately is efficiency; using an invalid region ensures that you only have to redraw one time.

惠繪洋

會有教程在 http://www.gtk.org.