+Throbbers utilize a wxTimer so that normal processing
+can continue unencumbered.
+"""
+
+#
+# throbber.py - Cliff Wells <clifford.wells@comcast.net>
+#
+# Thanks to Harald Massa <harald.massa@suedvers.de> for
+# suggestions and sample code.
+#
+# $Id$
+#
+# 12/12/2003 - Jeff Grimmett (grimmtooth@softhome.net)
+#
+# o 2.5 compatability update.
+#
+
+
+import os
+import wx
+
+# ------------------------------------------------------------------------------
+
+THROBBER_EVENT = wx.NewEventType()
+EVT_UPDATE_THROBBER = wx.PyEventBinder(THROBBER_EVENT, 0)
+
+class UpdateThrobberEvent(wx.PyEvent):
+ def __init__(self):
+ wx.PyEvent.__init__(self)
+ self.SetEventType(THROBBER_EVENT)
+
+# ------------------------------------------------------------------------------
+
+class Throbber(wx.PyPanel):
+ """
+ The first argument is either the name of a file that will be split into frames
+ (a composite image) or a list of strings of image names that will be treated
+ as individual frames. If a single (composite) image is given, then additional
+ information must be provided: the number of frames in the image and the width
+ of each frame. The first frame is treated as the "at rest" frame (it is not
+ shown during animation, but only when Throbber.Rest() is called.
+ A second, single image may be optionally specified to overlay on top of the
+ animation. A label may also be specified to show on top of the animation.
+ """
+ def __init__(self, parent, id,
+ bitmap, # single (composite) bitmap or list of bitmaps
+ pos = wx.DefaultPosition,
+ size = wx.DefaultSize,
+ frameDelay = 0.1,# time between frames
+ frames = 0, # number of frames (only necessary for composite image)
+ frameWidth = 0, # width of each frame (only necessary for composite image)
+ label = None, # optional text to be displayed
+ overlay = None, # optional image to overlay on animation
+ reverse = 0, # reverse direction at end of animation
+ style = 0, # window style
+ name = "throbber",
+ rest = 0,
+ current = 0,
+ direction = 1,
+ sequence = None
+ ):
+ wx.PyPanel.__init__(self, parent, id, pos, size, style, name)
+ self.name = name
+ self.label = label
+ self.running = (1 != 1)
+ _seqTypes = (type([]), type(()))
+
+ # set size, guessing if necessary
+ width, height = size
+ if width == -1:
+ if type(bitmap) in _seqTypes:
+ width = bitmap[0].GetWidth()
+ else:
+ if frameWidth:
+ width = frameWidth
+ if height == -1:
+ if type(bitmap) in _seqTypes:
+ height = bitmap[0].GetHeight()
+ else:
+ height = bitmap.GetHeight()
+ self.width, self.height = width, height
+
+ # double check it
+ assert width != -1 and height != -1, "Unable to guess size"
+
+ if label:
+ extentX, extentY = self.GetTextExtent(label)
+ self.labelX = (width - extentX)/2
+ self.labelY = (height - extentY)/2
+ self.frameDelay = frameDelay
+ self.rest = rest
+ self.current = current
+ self.direction = direction
+ self.autoReverse = reverse
+ self.overlay = overlay
+ if overlay is not None:
+ self.overlay = overlay
+ self.overlayX = (width - self.overlay.GetWidth()) / 2
+ self.overlayY = (height - self.overlay.GetHeight()) / 2
+ self.showOverlay = overlay is not None
+ self.showLabel = label is not None
+
+ # do we have a sequence of images?
+ if type(bitmap) in _seqTypes:
+ self.submaps = bitmap
+ self.frames = len(self.submaps)
+ # or a composite image that needs to be split?
+ else:
+ self.frames = frames
+ self.submaps = []
+ for chunk in range(frames):
+ rect = (chunk * frameWidth, 0, width, height)
+ self.submaps.append(bitmap.GetSubBitmap(rect))
+
+ # self.sequence can be changed, but it's not recommended doing it
+ # while the throbber is running. self.sequence[0] should always
+ # refer to whatever frame is to be shown when 'resting' and be sure
+ # that no item in self.sequence >= self.frames or < 0!!!
+ self.SetSequence(sequence)
+
+ self.SetClientSize((width, height))
+
+ timerID = wx.NewId()
+ self.timer = wx.Timer(self, timerID)
+
+ self.Bind(EVT_UPDATE_THROBBER, self.Update)
+ self.Bind(wx.EVT_PAINT, self.OnPaint)
+ self.Bind(wx.EVT_TIMER, self.OnTimer, self.timer)
+ self.Bind(wx.EVT_WINDOW_DESTROY, self.OnDestroyWindow)
+
+
+ def DoGetBestSize(self):
+ return (self.width, self.height)
+
+
+ def OnTimer(self, event):
+ wx.PostEvent(self, UpdateThrobberEvent())
+
+
+ def OnDestroyWindow(self, event):
+ self.Stop()
+ event.Skip()
+
+
+ def Draw(self, dc):
+ dc.DrawBitmap(self.submaps[self.sequence[self.current]], 0, 0, True)
+ if self.overlay and self.showOverlay:
+ dc.DrawBitmap(self.overlay, self.overlayX, self.overlayY, True)
+ if self.label and self.showLabel:
+ dc.DrawText(self.label, self.labelX, self.labelY)
+ dc.SetTextForeground(wx.WHITE)
+ dc.DrawText(self.label, self.labelX-1, self.labelY-1)
+
+
+ def OnPaint(self, event):
+ self.Draw(wx.PaintDC(self))
+ event.Skip()
+
+
+ def Update(self, event):
+ self.Next()
+
+
+ def Wrap(self):
+ if self.current >= len(self.sequence):
+ if self.autoReverse:
+ self.Reverse()
+ self.current = len(self.sequence) - 1
+ else:
+ self.current = 0
+ if self.current < 0:
+ if self.autoReverse:
+ self.Reverse()
+ self.current = 0
+ else:
+ self.current = len(self.sequence) - 1
+ self.Draw(wx.ClientDC(self))
+
+
+ # --------- public methods ---------
+ def SetFont(self, font):
+ """Set the font for the label"""
+ wx.Panel.SetFont(self, font)
+ self.SetLabel(self.label)
+ self.Draw(wx.ClientDC(self))
+
+
+ def Rest(self):
+ """Stop the animation and return to frame 0"""
+ self.Stop()
+ self.current = self.rest
+ self.Draw(wx.ClientDC(self))
+
+
+ def Reverse(self):
+ """Change the direction of the animation"""
+ self.direction = -self.direction
+
+
+ def Running(self):
+ """Returns True if the animation is running"""
+ return self.running
+
+
+ def Start(self):
+ """Start the animation"""
+ if not self.running:
+ self.running = not self.running
+ self.timer.Start(int(self.frameDelay * 1000))
+
+
+ def Stop(self):
+ """Stop the animation"""
+ if self.running:
+ self.timer.Stop()
+ self.running = not self.running
+
+
+ def SetCurrent(self, current):
+ """Set current image"""
+ running = self.Running()
+ if not running:
+ #FIXME: need to make sure value is within range!!!
+ self.current = current
+ self.Draw(wx.ClientDC(self))
+
+
+ def SetRest(self, rest):
+ """Set rest image"""
+ self.rest = rest
+
+
+ def SetSequence(self, sequence = None):
+ """Order to display images"""
+
+ # self.sequence can be changed, but it's not recommended doing it
+ # while the throbber is running. self.sequence[0] should always
+ # refer to whatever frame is to be shown when 'resting' and be sure
+ # that no item in self.sequence >= self.frames or < 0!!!
+
+ running = self.Running()
+ self.Stop()
+
+ if sequence is not None:
+ #FIXME: need to make sure values are within range!!!
+ self.sequence = sequence
+ else:
+ self.sequence = range(self.frames)
+
+ if running:
+ self.Start()
+
+
+ def Increment(self):
+ """Display next image in sequence"""
+ self.current += 1
+ self.Wrap()
+
+
+ def Decrement(self):
+ """Display previous image in sequence"""
+ self.current -= 1
+ self.Wrap()
+
+
+ def Next(self):
+ """Display next image in sequence according to direction"""
+ self.current += self.direction
+ self.Wrap()
+
+
+ def Previous(self):
+ """Display previous image in sequence according to direction"""
+ self.current -= self.direction
+ self.Wrap()
+
+
+ def SetFrameDelay(self, frameDelay = 0.05):
+ """Delay between each frame"""
+ self.frameDelay = frameDelay
+ if self.running:
+ self.Stop()
+ self.Start()
+
+
+ def ToggleOverlay(self, state = None):
+ """Toggle the overlay image"""
+ if state is None:
+ self.showOverlay = not self.showOverlay
+ else:
+ self.showOverlay = state
+ self.Draw(wx.ClientDC(self))
+
+
+ def ToggleLabel(self, state = None):
+ """Toggle the label"""
+ if state is None:
+ self.showLabel = not self.showLabel
+ else:
+ self.showLabel = state
+ self.Draw(wx.ClientDC(self))
+
+
+ def SetLabel(self, label):
+ """Change the text of the label"""
+ self.label = label
+ if label:
+ extentX, extentY = self.GetTextExtent(label)
+ self.labelX = (self.width - extentX)/2
+ self.labelY = (self.height - extentY)/2
+ self.Draw(wx.ClientDC(self))
+
+
+
+# ------------------------------------------------------------------------------
projects / wxWidgets.git / blobdiff