使用wxPython的FloatCanvas小部件，是否可以获取事件的ControlDown信息？

Question

I am wondering if I can get the keyboard modifiers' status on EVT_FC_LEFT_UP events fired from a FloatCanvas.

I would prefer to do it without writing callbacks myself for keyUp and keyDown. I can't see a better method of grabbing the control status, than having a class member keep track of the modifier states over the whole window.

Is it possible to grab the state of the control key inside of the EVT_FC_LEFT_UP callback?

Answer 1

there is no isKeyDown type method in wxPython (afaik)

the only way I can see you getting this is

control_pressed = False
.....
self.float_canvas.bind(wx.EVT_KEY_DOWN,OnKeyDown)
self.float_canvas.bind(wx.EVT_KEY_DOWN,OnKeyUp)
.....
def OnKeyDown(evt):
    global control_pressed
    if evt.GetKeyCode() == 117 #(or whatever the code for ctrl is)
       control_pressed = True

def OnKeyUp(evt):
    global control_pressed
    if evt.GetKeyCode() == 117 #(or whatever the code for ctrl is)
       control_pressed = False

And then check control_pressed in your wx.EVT_LEFT_UP event handler

also in real life(tm) I suspect you would want this all in a class not globals