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我創建了一個拖放程序,可以很好地處理一個小的美學問題。它通過選擇列表框中的項目,將其轉換爲canvas.create_text,然後將其放到畫布上。唯一的問題是,create_text在列表框下,我想知道如何使它出現在列表框的頂部。我試着改變初始化的順序,看着提高/降低,但我沒有看到任何改變。tkinter畫布在框架
def body(self, master):
self.list = Listbox(master, width=26, height=10)
self.list.grid(row=0, column=1)
self.canvas = Canvas(master, width=350, height=500)
self.canvas.grid(row=0, column=0)
for j in self.items:
self.list.insert(END, j)
self.list.bind("<ButtonPress-1>", self.onPress)
self.list.bind("<ButtonRelease-1>", self.onRelease)
self.list.bind("<B1-Motion>", self.onMotion)
def onPress(self, event):
'''Being drag of an object'''
# record the item and its location
w = event.widget
index = w.nearest(event.y)
name = self.list.get(index)
t = self.canvas.create_text(event.x+350, event.y+90, text=name.replace(' ', '\n'),justify=CENTER, tags='sweden')
self.dragData["item"] = t
self.dragData["x"] = event.x
self.dragData["y"] = event.y
self.list.delete(index)
def onMotion(self, event):
'''Handle dragging of an object'''
# compute how much this object has moved
deltaX = event.x - self.dragData["x"]
deltaY = event.y - self.dragData["y"]
# move the object the appropriate amount
self.canvas.move(self.dragData["item"], deltaX, deltaY)
# record the new position
self.dragData["x"] = event.x
self.dragData["y"] = event.y
def onRelease(self, event):
'''End drag of an object'''
# reset the drag information
wx, wy = self.canvas.winfo_rootx(), self.canvas.winfo_rooty()
x,y = self.winfo_pointerxy()
cx = self.canvas.canvasx(x-wx)
cy = self.canvas.canvasy(y-wy)
#Rest of the release code
我不明白「create_text是在listbox下」的意思。當列表框和畫布位於不重疊的窗口的兩個獨立部分時,它如何能在列表框下面? –
當我點擊列表框中的一個項目時,會在鼠標所在的位置(在列表框中)創建一個create_text,但列表框位於其上。我試圖設置它,以便在create_text創建時顯示在列表框的頂部 –