您好,我是 wxPython 的新手,仍在学习中。我正在尝试使用像这样的特定图像制作位图按钮,例如:http://i.min.us/idk3Uy.png
问题是我想保留按钮中图像的原始形状,例如圆形按钮而不是矩形按钮(默认)。
我想知道如何准确地做到这一点,或者是否有可能做到这一点;我确实查看了文档,发现样式常量 wx.BU_EXACTFIT 删除了不必要的边框……但它仍然不是我想要的理想形状。
谢谢。
最佳答案
您可能必须为此实现一个自定义控件。我已经完成了自定义 wxPython 控件的部分工作,因此我继续为您编写了一个 ShapedButton
类。 =)
要运行这个演示,您只需要三张图片:
- 按钮-normal.png
- 按下按钮.png
- 按钮禁用.png
根据按钮的状态使用这三个图像。只有“正常”是必需的,但您可能希望至少提供“正常”和“按下”,以便用户在点击时获得反馈。
该控件仅响应在普通位图的非透明区域中的点击。单击和释放时,它会正确触发 EVT_BUTTON
事件。
尽情享受吧!
import wx
class ShapedButton(wx.PyControl):
def __init__(self, parent, normal, pressed=None, disabled=None):
super(ShapedButton, self).__init__(parent, -1, style=wx.BORDER_NONE)
self.normal = normal
self.pressed = pressed
self.disabled = disabled
self.region = wx.RegionFromBitmapColour(normal, wx.Color(0, 0, 0, 0))
self._clicked = False
self.SetBackgroundStyle(wx.BG_STYLE_CUSTOM)
self.Bind(wx.EVT_SIZE, self.on_size)
self.Bind(wx.EVT_PAINT, self.on_paint)
self.Bind(wx.EVT_LEFT_DOWN, self.on_left_down)
self.Bind(wx.EVT_LEFT_DCLICK, self.on_left_dclick)
self.Bind(wx.EVT_LEFT_UP, self.on_left_up)
self.Bind(wx.EVT_MOTION, self.on_motion)
self.Bind(wx.EVT_LEAVE_WINDOW, self.on_leave_window)
def DoGetBestSize(self):
return self.normal.GetSize()
def Enable(self, *args, **kwargs):
super(ShapedButton, self).Enable(*args, **kwargs)
self.Refresh()
def Disable(self, *args, **kwargs):
super(ShapedButton, self).Disable(*args, **kwargs)
self.Refresh()
def post_event(self):
event = wx.CommandEvent()
event.SetEventObject(self)
event.SetEventType(wx.EVT_BUTTON.typeId)
wx.PostEvent(self, event)
def on_size(self, event):
event.Skip()
self.Refresh()
def on_paint(self, event):
dc = wx.AutoBufferedPaintDC(self)
dc.SetBackground(wx.Brush(self.GetParent().GetBackgroundColour()))
dc.Clear()
bitmap = self.normal
if self.clicked:
bitmap = self.pressed or bitmap
if not self.IsEnabled():
bitmap = self.disabled or bitmap
dc.DrawBitmap(bitmap, 0, 0)
def set_clicked(self, clicked):
if clicked != self._clicked:
self._clicked = clicked
self.Refresh()
def get_clicked(self):
return self._clicked
clicked = property(get_clicked, set_clicked)
def on_left_down(self, event):
x, y = event.GetPosition()
if self.region.Contains(x, y):
self.clicked = True
def on_left_dclick(self, event):
self.on_left_down(event)
def on_left_up(self, event):
if self.clicked:
x, y = event.GetPosition()
if self.region.Contains(x, y):
self.post_event()
self.clicked = False
def on_motion(self, event):
if self.clicked:
x, y = event.GetPosition()
if not self.region.Contains(x, y):
self.clicked = False
def on_leave_window(self, event):
self.clicked = False
def main():
def on_button(event):
print 'Button was clicked.'
app = wx.PySimpleApp()
frame = wx.Frame(None, -1, 'Shaped Button Demo')
panel = wx.Panel(frame, -1)
button = ShapedButton(panel,
wx.Bitmap('button-normal.png'),
wx.Bitmap('button-pressed.png'),
wx.Bitmap('button-disabled.png'))
button.Bind(wx.EVT_BUTTON, on_button)
sizer = wx.BoxSizer(wx.VERTICAL)
sizer.AddStretchSpacer(1)
sizer.Add(button, 0, wx.ALIGN_CENTER)
sizer.AddStretchSpacer(1)
panel.SetSizer(sizer)
frame.Show()
app.MainLoop()
if __name__ == '__main__':
main()
关于python - WxPython 改变位图按钮的形状,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/6449709/