GTK 拖放验证 X11 光标在 Drag_get_data 内锁定

Question

我无法在 pygtk 中进行拖放验证。我没有主意，想要第二个意见。

我的目标是只允许删除包含 .jpg 的文件。

具体来说，每当我在拖动动作回调中调用 widget.drag_get_data 时，X11 光标就会锁定。由于我必须杀死 X11 并重新启动所有内容，因此调试变得乏味且令人烦恼。

这是我的源代码，我认为问题具体在于drag_motion_cb和drag_data_received_cb方法。我已经留下了我之前尝试过的注释掉的部分。

使用Google代码搜索搜索drag_get_data不会显示其他人正在执行高级验证。所以我猜其他人也失败了。

如果我无法弄清楚这一点，我没有想法，最终只会在我的 Linux 端口中使用简单的 DnD（未经适当的验证）。

提前致谢。

导入pygtk 
pygtk.require('2.0')
导入gobject
导入 gtk

 TARGET_TEXT_URI_LIST = 0

 drop_targets = [
  （“文本/uri-列表”，0，TARGET_TEXT_URI_LIST）
]

类 TestApp(gobject.GObject):
  生成器 = gtk.Builder()
  窗口 = 无
  按钮 = None

 def init(self):
    gobject.GObject.init(self)

assert self.builder != None
self.builder.add_from_file("MainWindow.glade");
self.window = self.builder.get_object("window1")
self.button = self.builder.get_object("button1")

self.window.connect("destroy", gtk.main_quit)

self.button.drag_dest_set(gtk.DEST_DEFAULT_ALL, drop_targets, gtk.gdk.ACTION_COPY|gtk.gdk.ACTION_LINK|gtk.gdk.ACTION_MOVE)

self.button.connect("drag-data-received", self.drag_data_received_cb)
self.button.connect("drag-drop", self.drag_drop_cb)
self.button.connect("drag-motion", self.drag_motion_cb)
self.button.connect("drag-leave", self.drag_leave_cb)

self.window.show_all()


 drop_data_ready = False
  drop_occurred = False
  drop_highlight = 假
  drop_data = None

 def Drag_data_received_cb(self,小部件,上下文,x,y,数据,信息,时间戳):
    打印“drag_data_received_cb”

# Check to see if we have the drop data yet.
if False == self.drop_data_ready:
  # If this is data we expected or can handle, then process it.
  if TARGET_TEXT_URI_LIST == info and data.get_format() == 8 and data.get_length() > 0:
    self.drop_data = data.get_uris()
    self.drop_data_ready = True
  context.drag_status(gtk.gdk.ACTION_COPY, timestamp)

# Actual drop handling code.
if True == self.drop_occurred:
  # Reset state.
  self.drop_occurred = False

  print "RECEIVED DROP",self.drop_data

  # Notify whether we handled the drop or not.
  context.finish(True,False,timestamp)

  # Clean up.
  self.drag_leave_cb(widget, context, timestamp)
return True


 def Drag_drop_cb（自身，小部件，上下文，x，y，时间戳）：
    target = widget.drag_dest_find_target(context, widget.drag_dest_get_target_list())

# Is it something we can handle?

if target == gtk.gdk.atom_intern("text/uri-list", False):
  # Tell data recieved handler (do_drag_data_received) we can actually handle the drop.
  self.drop_occurred = True

  widget.drag_get_data(context,target,timestamp)

  # We can handle this data type.
  return True
else:
  # We cannot handle the drop.
  return False
pass


 def Drag_motion_cb(self,widget,context,x,y,timestamp):

if not self.drop_data_ready:
  widget.drag_get_data(context, gtk.gdk.atom_intern("text/uri-list",False), timestamp)
  return False



"""
target = widget.drag_dest_find_target(context, widget.drag_dest_get_target_list())
if target == gtk.gdk.atom_intern("text/uri-list", False):
  if True == self.drop_data_ready:
    pass
  else:


    #widget.drag_get_data(context, target, timestamp)
    pass
  """



context.drag_status(gtk.gdk.ACTION_COPY, timestamp)
"""

if target == gtk.gdk.atom_intern("text/uri-list", False):
  if True == self.drop_data_ready:
    if repr(drop_data).find(".jpg") != -1:
      # Tell Gdk we can handle this.
      context.drag_status(gtk.gdk.ACTION_COPY, timestamp)

      # Draw drop highlight (but only once).
      if False == self.drop_highlight:
        widget.drag_highlight()
        self.drop_highlight = True

      # Return here, don't fall through.
      return True
  else:
    # Request drag data from the source.
    widget.drag_get_data(context, target, timestamp)

    # Fall-through to not allowing.
"""

# not something we can handle
#context.drag_status(0, timestamp) # Don't allow drop.
return True


pass


 def Drag_leave_cb(self,widget,context,timestamp):
    # 清理拖动数据。
    如果 True == self.drop_data_ready：
      self.drop_data = 无
      self.drop_data_ready = False

# Un-draw the highlight.
if True == self.drop_highlight:
  widget.drag_unhighlight()
  self.drop_highlight = False
pass


 gobject.type_register(TestApp)

 def main():
  汽车=测试应用程序（）
  gtk.main()

 if name == 'ma​​in':
  主要的（）

Answer 1

我认为你必须在drag_data_received_cb中做这样的事情

def drag_data_received_cb(self, obj, context, x, y, selection, target_id, etime):
    try:
        dtype = selection.get_data_type()
    except AttributeError:## Old PyGTK
        dtype = selection.type
    if dtype=='image/jpeg':
        image_data = selection.data
        ## do somthing with image_data
        return True
    return False