python - 如何将静态位图帧从 GIF 提供给 wxpython 形状帧

Question

我正在努力弄清楚如何从用户选择的 GIF(具有透明背景)提交位图帧并显示 GIF/帧，而不创建额外的 UI 元素来删除透明度。 (假设用户的桌面环境不支持透明窗口)。

此处提供了最接近的解决方案:How to blit a image directly to the screen without a window?

但是该解决方案仅支持单个图像。我正在尝试修改发现的代码 here将 GIF 转换为帧，然后强制 wxPython 显示每个帧，但我完全不知道如何计时帧的显示时间，或者这是否是正确的方法。我复制了下面我正在使用的代码。

import wx
from PIL import Image, ImageSequence

IMAGE_PATH = 'TEST.gif'
im = Image.open(IMAGE_PATH)

index = 1
for frame in ImageSequence.Iterator(im):
    frame.save("frame%d.png" % index)
    index += 1

class ShapedFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, -1, "Shaped Window",
                style = wx.FRAME_SHAPED | wx.SIMPLE_BORDER)
        self.hasShape = False
        self.delta = wx.Point(0,0)            
        self.bmp = wx.BitmapFromImage(image)
        self.SetClientSize((self.bmp.GetWidth(), self.bmp.GetHeight()))
        dc = wx.ClientDC(self)
        dc.DrawBitmap(self.bmp, 0,0, True)
        self.SetWindowShape()
        self.Bind(wx.EVT_LEFT_DCLICK, self.OnDoubleClick)
        self.Bind(wx.EVT_LEFT_DOWN, self.OnLeftDown)
        self.Bind(wx.EVT_LEFT_UP, self.OnLeftUp)
        self.Bind(wx.EVT_MOTION, self.OnMouseMove)
        self.Bind(wx.EVT_RIGHT_UP, self.OnExit)
        self.Bind(wx.EVT_PAINT, self.OnPaint)
        self.Bind(wx.EVT_WINDOW_CREATE, self.SetWindowShape)
        self.Bind(wx.EVT_ERASE_BACKGROUND, self.OnEraseBackground)
    def OnEraseBackground(self,evt=None):
        pass        
    def SetWindowShape(self, evt=None):
        r = wx.RegionFromBitmap(self.bmp)
        self.hasShape = self.SetShape(r)
    def OnDoubleClick(self, evt):
        if self.hasShape:
            self.SetShape(wx.Region())
            self.hasShape = False
        else:
            self.SetWindowShape()
    def OnPaint(self, evt):
        dc = wx.PaintDC(self)
        dc.DrawBitmap(self.bmp, 0,0, True)
    def OnExit(self, evt):
        self.Close()
    def OnLeftDown(self, evt):
        self.CaptureMouse()
        pos = self.ClientToScreen(evt.GetPosition())
        origin = self.GetPosition()
        self.delta = wx.Point(pos.x - origin.x, pos.y - origin.y)
    def OnMouseMove(self, evt):
        if evt.Dragging() and evt.LeftIsDown():
            pos = self.ClientToScreen(evt.GetPosition())
            newPos = (pos.x - self.delta.x, pos.y - self.delta.y)
            self.Move(newPos)
    def OnLeftUp(self, evt):
        if self.HasCapture():
            self.ReleaseMouse()

i = 0
if __name__ == '__main__':
    while 1:
        while i >= index:
        # Load the image
        img = 'frame%s.png' % (i)
        image = wx.Image(img, wx.BITMAP_TYPE_PNG)        
        app = wx.PySimpleApp()
        ShapedFrame().Show()
        app.MainLoop()
        i = i + 1

Answer 1

我不确定您想通过“shapeframe”业务实现什么目标，但这应该会为您指明正确的方向。
我用 gif 文件中的帧填充屏幕，每 1/2 秒(500 毫秒)更改一次帧，在到达最终帧时循环回到开头。
这是使用 wx.Timer 的经典案例。
显然，如果不需要，您可以丢失 Scale 例程。

import wx
from PIL import Image, ImageSequence
IMAGE_PATH = 'TEST.gif'
im = Image.open(IMAGE_PATH)
imgs=[]

index = 1
for frame in ImageSequence.Iterator(im):
    frame.save("frame%d.png" % index)
    imgs.append("frame%d.png" % index)
    index += 1

class MyFrame(wx.Frame):
    def __init__(self):
        wx.Frame.__init__(self, None, -1, "Gif Frames")
        self.screenW = wx.SystemSettings.GetMetric( wx.SYS_SCREEN_X )
        self.screenH = wx.SystemSettings.GetMetric( wx.SYS_SCREEN_Y )
        self.SetSize(self.screenW,self.screenH)
        self.image_counter = 0
        image = wx.Image(imgs[self.image_counter], wx.BITMAP_TYPE_PNG)
        self.size = image.GetSize()
        bitmap = self.Scale(image)
        self.img = wx.StaticBitmap(self, wx.ID_ANY, bitmap)
        self.timer = wx.Timer(self)
        self.Bind(wx.EVT_TIMER, self.OnTimer, self.timer)
        self.Show()
        self.timer.Start(500)

    def Scale(self,image):
        image = image.Scale(self.screenW,self.screenH, wx.IMAGE_QUALITY_HIGH)
        #image = image.Scale(self.size[0],self.size[1], wx.IMAGE_QUALITY_HIGH)
        result = wx.Bitmap(image)
        return result


    def OnTimer(self, event):
        #New frame every 1/2 a second
        self.image_counter +=1
        if self.image_counter > len(imgs) -1:
            self.image_counter = 0
        image = wx.Image(imgs[self.image_counter], wx.BITMAP_TYPE_PNG)
        bitmap = self.Scale(image)
        self.img.SetBitmap(bitmap)

    def OnExit(self, evt):
        self.Destroy()

if __name__ == '__main__':
        app = wx.App()
        MyFrame()
        app.MainLoop()