GTK拖动和拖放验证X11光标锁定内drag_get_data

Question

我一直无法得到拖放验证在PyGTK的工作。我没有想法，想要第二个意见。

我的目标是只允许包含的.jpg被丢弃的文件。

具体而言，每当我请widget.drag_get_data拖运动内回调X11光标锁定。制作调试繁琐和加重，因为我要杀死X11并重新启动一切。

这里是我的源代码，我认为这个问题在drag_motion_cb和drag_data_received_cb方法具体所在。我已经离开了我之前尝试过的注释部分。

使用谷歌代码搜索搜索drag_get_data不显示任何其他人做先进的验证。所以我猜别人也失败了。

我出出主意，并最终将只使用简单的DnD在我的Linux端口（没有适当的验证），如果我能不知道这一点。

在此先感谢。

 

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

TARGET_TEXT_URI_LIST = 0
 

drop_targets = [ ("text/uri-list", 0, TARGET_TEXT_URI_LIST) ]
 

class TestApp(gobject.GObject): builder = gtk.Builder() window = None button = 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 =假 drop_occurred =假 drop_highlight =假 drop_data =无
 

DEF drag_data_received_cb（个体，插件，语境，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（个体，插件，语境，X，Y，时间戳）： 目标=无线dget.drag_dest_find_target（上下文，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（个体，插件，语境，X，Y，时间戳）：
 

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（个体，小窗口，上下文，时间戳）： ＃清理拖动数据。 如果真== self.drop_data_ready： self.drop_data =无 self.drop_data_ready =假
 

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

gobject.type_register（TestApp）
 

高清的main（）： 车= TestApp（） gtk.main（）
 

如果名 == '主要'： 的main（）
 

Answer 1

我想你一定地方做这样的事情在drag_data_received_cb

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