如何使用wxpython在位圖中繪製文本？

Question

我想繪製一個以wx.EmptyBitmap爲中心的數字。

我該如何使用wxpython來做到這一點？

感謝提前:)

import wx 

app = None 

class Size(wx.Frame): 
    def __init__(self, parent, id, title): 
     frame = wx.Frame.__init__(self, parent, id, title, size=(250, 200)) 
     bmp = wx.EmptyBitmap(100, 100) 
     dc = wx.MemoryDC() 
     dc.SelectObject(bmp) 
     dc.DrawText("whatever", 50, 50) 
     dc.SelectObject(wx.NullBitmap) 
     wx.StaticBitmap(self, -1, bmp) 
     self.Show(True) 


app = wx.App() 
Size(None, -1, 'Size') 
app.MainLoop() 

此代碼只給了我黑色的形象，我究竟做錯了什麼？ 現在缺少在這裏..

Answer 1

選擇在wx.MemoryDC的BMP，對DC畫什麼，然後選擇位圖進行例如

import wx 

app = None 

class Size(wx.Frame): 
    def __init__(self, parent, id, title): 
     frame = wx.Frame.__init__(self, parent, id, title, size=(250, 200)) 
     w, h = 100, 100 
     bmp = wx.EmptyBitmap(w, h) 
     dc = wx.MemoryDC() 
     dc.SelectObject(bmp) 
     dc.Clear() 
     text = "whatever" 
     tw, th = dc.GetTextExtent(text) 
     dc.DrawText(text, (w-tw)/2, (h-th)/2) 
     dc.SelectObject(wx.NullBitmap) 
     wx.StaticBitmap(self, -1, bmp) 
     self.Show(True) 


app = wx.App() 
app.MainLoop() 

Answer 2

您使用wx.MemoryDC