wxPython的 - 調整圖像無閃爍？

Question

我一般是新來的wxPython和GUI。現在應用程序只顯示一個工具欄，狀態欄和下面的面板。該面板包含一個帶有staticBitmap的boxSizer。我想有一個圖像調整自身每當窗口大小以適應其容器，但我遇到了很多閃爍。當窗口被調整大小（EVT_SIZE火災）
resizeImage（）調整大小的面板，以適應新的尺寸，然後秤與scaleImage（圖像

摘要
resizeImage（）被調用），並將其放置到所述staticBitmap

resizeImage（）基本上抓住所述圖像對象，調整其大小，它設置爲位圖，然後將其設置爲將被顯示的staticbitmap。

代碼

class Canvas(wx.Panel): 
"""Panel used to display selected images""" 

#--------------------------------------------------------------------------- 
def __init__(self, parent): 
    """Constructor""" 
    wx.Panel.__init__(self, parent) 

    # Globals 
    self.image  = wx.EmptyImage(1,1) 
    self.control = wx.StaticBitmap(self, wx.ID_ANY, 
            wx.BitmapFromImage(self.image))  
    self.background = wx.BLACK 
    self.padding = 5 
    self.imageList = [] 
    self.current = 0 
    self.total  = 0 

    # Register Events 
    Publisher().subscribe(self.onLoadDirectory, ("load directory")) 
    Publisher().subscribe(self.resizeImage, ("resize window")) 

    # Set Layout 
    self.mainSizer = wx.BoxSizer(wx.VERTICAL) 
    self.mainSizer.Add(self.control, 1, wx.ALL|wx.CENTER|wx.EXPAND, 
      self.padding) 
    self.SetSizer(self.mainSizer) 
    self.SetBackgroundColour(self.background) 

#--------------------------------------------------------------------------- 
def scaleImage(self, image, maxWidth, maxHeight): 
    """asd""" 
    width = image.GetWidth() 
    height = image.GetHeight() 
    ratio = min(maxWidth/width, maxHeight/ height); 
    image = image.Scale(ratio*width, ratio*height, wx.IMAGE_QUALITY_HIGH) 
    result = wx.BitmapFromImage(image) 

    return result 

#--------------------------------------------------------------------------- 
def loadImage(self, image): 
    """Load image""" 
    self.image = wx.Image(image, wx.BITMAP_TYPE_ANY) 
    bmp = wx.BitmapFromImage(self.image) 
    w, h = self.mainSizer.GetSize() 
    w = w - self.padding*2 
    h = h - self.padding*2 
    bmp = self.scaleImage(self.image, w, h)   
    self.control.SetBitmap(bmp) 

#--------------------------------------------------------------------------- 
def getImageIndex(self, path): 
    """Retrieve index of image from imagePaths""" 
    i = 0 
    for image in self.imagePaths: 
     if image == path: 
      return i 
     i += 1 
    return -1 

#--------------------------------------------------------------------------- 
def resizeImage(self, event): 
    self.SetSize(event.data) 
    if self.total: 
     w = event.data[0] - self.padding*2 
     h = event.data[1] - self.padding*2 
     bmp = self.scaleImage(self.image, w, h) 
     self.control.SetBitmap(bmp) 

#--------------------------------------------------------------------------- 
def onLoadDirectory(self, event): 
    """Load the image and compile a list of image files from directory""" 
    self.folderPath  = os.path.dirname(event.data) 
    self.imagePaths  = glob.glob(self.folderPath + "\\*.jpg") 
    self.total   = len(self.imagePaths) 
    self.current  = self.getImageIndex(event.data) 
    self.SetSize(self.GetSize()) 
    self.loadImage(self.imagePaths[self.current]) 

Answer 1

在double buffered DC嘗試drawing而不是使用的StaticBitmap。

Answer 2

在你resizeImage方法，它可能有助於增加凍結和解凍，這樣的：

def resizeImage(self, event): 
    self.SetSize(event.data) 
    if self.total: 
     w = event.data[0] - self.padding*2 
     h = event.data[1] - self.padding*2 
     self.Freeze() 
     bmp = self.scaleImage(self.image, w, h) 
     self.control.SetBitmap(bmp) 
     self.Thaw()