a6cb8040a8
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38062 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
773 lines
25 KiB
Python
773 lines
25 KiB
Python
#----------------------------------------------------------------------
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# Name: wx.lib.splitter
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# Purpose: A class similar to wx.SplitterWindow but that allows more
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# than a single split
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#
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# Author: Robin Dunn
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#
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# Created: 9-June-2005
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# RCS-ID: $Id$
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# Copyright: (c) 2005 by Total Control Software
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# Licence: wxWindows license
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#----------------------------------------------------------------------
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"""
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This module provides the `MultiSplitterWindow` class, which is very
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similar to the standard `wx.SplitterWindow` except it can be split
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more than once.
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"""
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import wx
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import sys
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_RENDER_VER = (2,6,1,1)
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#----------------------------------------------------------------------
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class MultiSplitterWindow(wx.PyPanel):
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"""
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This class is very similar to `wx.SplitterWindow` except that it
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allows for more than two windows and more than one sash. Many of
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the same styles, constants, and methods behave the same as in
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wx.SplitterWindow. The key differences are seen in the methods
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that deal with the child windows managed by the splitter, and also
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those that deal with the sash positions. In most cases you will
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need to pass an index value to tell the class which window or sash
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you are refering to.
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The concept of the sash position is also different than in
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wx.SplitterWindow. Since the wx.Splitterwindow has only one sash
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you can think of it's position as either relative to the whole
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splitter window, or as relative to the first window pane managed
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by the splitter. Once there is more than one sash then the
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distinciton between the two concepts needs to be clairified. I've
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chosen to use the second definition, and sash positions are the
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distance (either horizontally or vertically) from the origin of
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the window just before the sash in the splitter stack.
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NOTE: These things are not yet supported:
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* Using negative sash positions to indicate a position offset
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from the end.
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* User controlled unsplitting (with double clicks on the sash
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or dragging a sash until the pane size is zero.)
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* Sash gravity
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"""
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def __init__(self, parent, id=-1,
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pos = wx.DefaultPosition, size = wx.DefaultSize,
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style = 0, name="multiSplitter"):
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# always turn on tab traversal
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style |= wx.TAB_TRAVERSAL
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# and turn off any border styles
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style &= ~wx.BORDER_MASK
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style |= wx.BORDER_NONE
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# initialize the base class
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wx.PyPanel.__init__(self, parent, id, pos, size, style, name)
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self.SetBackgroundStyle(wx.BG_STYLE_CUSTOM)
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# initialize data members
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self._windows = []
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self._sashes = []
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self._pending = {}
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self._permitUnsplitAlways = self.HasFlag(wx.SP_PERMIT_UNSPLIT)
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self._orient = wx.HORIZONTAL
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self._dragMode = wx.SPLIT_DRAG_NONE
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self._activeSash = -1
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self._oldX = 0
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self._oldY = 0
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self._checkRequestedSashPosition = False
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self._minimumPaneSize = 0
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self._sashCursorWE = wx.StockCursor(wx.CURSOR_SIZEWE)
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self._sashCursorNS = wx.StockCursor(wx.CURSOR_SIZENS)
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self._sashTrackerPen = wx.Pen(wx.BLACK, 2, wx.SOLID)
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self._needUpdating = False
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self._isHot = False
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# Bind event handlers
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self.Bind(wx.EVT_PAINT, self._OnPaint)
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self.Bind(wx.EVT_IDLE, self._OnIdle)
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self.Bind(wx.EVT_SIZE, self._OnSize)
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self.Bind(wx.EVT_MOUSE_EVENTS, self._OnMouse)
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def SetOrientation(self, orient):
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"""
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Set whether the windows managed by the splitter will be
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stacked vertically or horizontally. The default is
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horizontal.
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"""
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assert orient in [ wx.VERTICAL, wx.HORIZONTAL ]
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self._orient = orient
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def GetOrientation(self):
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"""
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Returns the current orientation of the splitter, either
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wx.VERTICAL or wx.HORIZONTAL.
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"""
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return self._orient
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def SetMinimumPaneSize(self, minSize):
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"""
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Set the smallest size that any pane will be allowed to be
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resized to.
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"""
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self._minimumPaneSize = minSize
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def GetMinimumPaneSize(self):
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"""
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Returns the smallest allowed size for a window pane.
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"""
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return self._minimumPaneSize
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def AppendWindow(self, window, sashPos=-1):
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"""
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Add a new window to the splitter at the right side or bottom
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of the window stack. If sashPos is given then it is used to
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size the new window.
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"""
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self.InsertWindow(sys.maxint, window, sashPos)
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def InsertWindow(self, idx, window, sashPos=-1):
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"""
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Insert a new window into the splitter at the position given in
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``idx``.
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"""
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assert window not in self._windows, "A window can only be in the splitter once!"
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self._windows.insert(idx, window)
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self._sashes.insert(idx, -1)
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if not window.IsShown():
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window.Show()
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if sashPos != -1:
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self._pending[window] = sashPos
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self._checkRequestedSashPosition = False
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self._SizeWindows()
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def DetachWindow(self, window):
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"""
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Removes the window from the stack of windows managed by the
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splitter. The window will still exist so you should `Hide` or
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`Destroy` it as needed.
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"""
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assert window in self._windows, "Unknown window!"
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idx = self._windows.index(window)
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del self._windows[idx]
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del self._sashes[idx]
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self._SizeWindows()
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def ReplaceWindow(self, oldWindow, newWindow):
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"""
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Replaces oldWindow (which is currently being managed by the
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splitter) with newWindow. The oldWindow window will still
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exist so you should `Hide` or `Destroy` it as needed.
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"""
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assert oldWindow in self._windows, "Unknown window!"
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idx = self._windows.index(oldWindow)
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self._windows[idx] = newWindow
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if not newWindow.IsShown():
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newWindow.Show()
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self._SizeWindows()
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def ExchangeWindows(self, window1, window2):
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"""
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Trade the positions in the splitter of the two windows.
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"""
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assert window1 in self._windows, "Unknown window!"
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assert window2 in self._windows, "Unknown window!"
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idx1 = self._windows.index(window1)
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idx2 = self._windows.index(window2)
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self._windows[idx1] = window2
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self._windows[idx2] = window1
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self._SizeWindows()
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def GetWindow(self, idx):
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"""
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Returns the idx'th window being managed by the splitter.
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"""
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assert idx < len(self._windows)
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return self._windows[idx]
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def GetSashPosition(self, idx):
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"""
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Returns the position of the idx'th sash, measured from the
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left/top of the window preceding the sash.
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"""
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assert idx < len(self._sashes)
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return self._sashes[idx]
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def SizeWindows(self):
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"""
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Reposition and size the windows managed by the splitter.
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Useful when windows have been added/removed or when styles
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have been changed.
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"""
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self._SizeWindows()
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def DoGetBestSize(self):
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"""
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Overridden base class virtual. Determines the best size of
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the control based on the best sizes of the child windows.
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"""
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best = wx.Size(0,0)
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if not self._windows:
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best = wx.Size(10,10)
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sashsize = self._GetSashSize()
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if self._orient == wx.HORIZONTAL:
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for win in self._windows:
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winbest = win.GetAdjustedBestSize()
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best.width += max(self._minimumPaneSize, winbest.width)
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best.height = max(best.height, winbest.height)
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best.width += sashsize * (len(self._windows)-1)
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else:
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for win in self._windows:
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winbest = win.GetAdjustedBestSize()
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best.height += max(self._minimumPaneSize, winbest.height)
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best.width = max(best.width, winbest.width)
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best.height += sashsize * (len(self._windows)-1)
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border = 2 * self._GetBorderSize()
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best.width += border
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best.height += border
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return best
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# -------------------------------------
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# Event handlers
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def _OnPaint(self, evt):
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dc = wx.PaintDC(self)
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self._DrawSash(dc)
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def _OnSize(self, evt):
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parent = wx.GetTopLevelParent(self)
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if parent.IsIconized():
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evt.Skip()
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return
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self._SizeWindows()
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def _OnIdle(self, evt):
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evt.Skip()
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# if this is the first idle time after a sash position has
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# potentially been set, allow _SizeWindows to check for a
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# requested size.
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if not self._checkRequestedSashPosition:
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self._checkRequestedSashPosition = True
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self._SizeWindows()
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if self._needUpdating:
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self._SizeWindows()
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def _OnMouse(self, evt):
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if self.HasFlag(wx.SP_NOSASH):
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return
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x, y = evt.GetPosition()
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isLive = self.HasFlag(wx.SP_LIVE_UPDATE)
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adjustNeighbor = evt.ShiftDown()
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# LeftDown: set things up for dragging the sash
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if evt.LeftDown() and self._SashHitTest(x, y) != -1:
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self._activeSash = self._SashHitTest(x, y)
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self._dragMode = wx.SPLIT_DRAG_DRAGGING
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self.CaptureMouse()
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self._SetResizeCursor()
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if not isLive:
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self._pendingPos = (self._sashes[self._activeSash],
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self._sashes[self._activeSash+1])
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self._DrawSashTracker(x, y)
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self._oldX = x
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self._oldY = y
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return
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# LeftUp: Finsish the drag
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elif evt.LeftUp() and self._dragMode == wx.SPLIT_DRAG_DRAGGING:
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self._dragMode = wx.SPLIT_DRAG_NONE
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self.ReleaseMouse()
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self.SetCursor(wx.STANDARD_CURSOR)
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if not isLive:
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# erase the old tracker
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self._DrawSashTracker(self._oldX, self._oldY)
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diff = self._GetMotionDiff(x, y)
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# determine if we can change the position
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if isLive:
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oldPos1, oldPos2 = (self._sashes[self._activeSash],
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self._sashes[self._activeSash+1])
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else:
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oldPos1, oldPos2 = self._pendingPos
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newPos1, newPos2 = self._OnSashPositionChanging(self._activeSash,
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oldPos1 + diff,
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oldPos2 - diff,
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adjustNeighbor)
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if newPos1 == -1:
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# the change was not allowed
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return
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# TODO: check for unsplit?
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self._SetSashPositionAndNotify(self._activeSash, newPos1, newPos2, adjustNeighbor)
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self._activeSash = -1
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self._pendingPos = (-1, -1)
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self._SizeWindows()
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# Entering or Leaving a sash: Change the cursor
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elif (evt.Moving() or evt.Leaving() or evt.Entering()) and self._dragMode == wx.SPLIT_DRAG_NONE:
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if evt.Leaving() or self._SashHitTest(x, y) == -1:
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self._OnLeaveSash()
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else:
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self._OnEnterSash()
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# Dragging the sash
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elif evt.Dragging() and self._dragMode == wx.SPLIT_DRAG_DRAGGING:
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diff = self._GetMotionDiff(x, y)
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if not diff:
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return # mouse didn't move far enough
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# determine if we can change the position
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if isLive:
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oldPos1, oldPos2 = (self._sashes[self._activeSash],
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self._sashes[self._activeSash+1])
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else:
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oldPos1, oldPos2 = self._pendingPos
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newPos1, newPos2 = self._OnSashPositionChanging(self._activeSash,
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oldPos1 + diff,
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oldPos2 - diff,
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adjustNeighbor)
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if newPos1 == -1:
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# the change was not allowed
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return
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if newPos1 == self._sashes[self._activeSash]:
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return # nothing was changed
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if not isLive:
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# erase the old tracker
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self._DrawSashTracker(self._oldX, self._oldY)
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if self._orient == wx.HORIZONTAL:
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x = self._SashToCoord(self._activeSash, newPos1)
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else:
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y = self._SashToCoord(self._activeSash, newPos1)
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# Remember old positions
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self._oldX = x
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self._oldY = y
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if not isLive:
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# draw a new tracker
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self._pendingPos = (newPos1, newPos2)
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self._DrawSashTracker(self._oldX, self._oldY)
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else:
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self._DoSetSashPosition(self._activeSash, newPos1, newPos2, adjustNeighbor)
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self._needUpdating = True
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# -------------------------------------
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# Internal helpers
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def _RedrawIfHotSensitive(self, isHot):
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if not wx.VERSION >= _RENDER_VER:
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return
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if wx.RendererNative.Get().GetSplitterParams(self).isHotSensitive:
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self._isHot = isHot
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dc = wx.ClientDC(self)
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self._DrawSash(dc)
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def _OnEnterSash(self):
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self._SetResizeCursor()
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self._RedrawIfHotSensitive(True)
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def _OnLeaveSash(self):
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self.SetCursor(wx.STANDARD_CURSOR)
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self._RedrawIfHotSensitive(False)
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def _SetResizeCursor(self):
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if self._orient == wx.HORIZONTAL:
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self.SetCursor(self._sashCursorWE)
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else:
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self.SetCursor(self._sashCursorNS)
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def _OnSashPositionChanging(self, idx, newPos1, newPos2, adjustNeighbor):
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# TODO: check for possibility of unsplit (pane size becomes zero)
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# make sure that minsizes are honored
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newPos1, newPos2 = self._AdjustSashPosition(idx, newPos1, newPos2, adjustNeighbor)
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# sanity check
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if newPos1 <= 0:
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newPos2 += newPos1
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newPos1 = 0
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# send the events
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evt = MultiSplitterEvent(
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wx.wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING, self)
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evt.SetSashIdx(idx)
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evt.SetSashPosition(newPos1)
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if not self._DoSendEvent(evt):
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# the event handler vetoed the change
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newPos1 = -1
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else:
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# or it might have changed the value
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newPos1 = evt.GetSashPosition()
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if adjustNeighbor and newPos1 != -1:
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evt.SetSashIdx(idx+1)
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evt.SetSashPosition(newPos2)
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if not self._DoSendEvent(evt):
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# the event handler vetoed the change
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newPos2 = -1
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else:
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# or it might have changed the value
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newPos2 = evt.GetSashPosition()
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if newPos2 == -1:
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newPos1 = -1
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return (newPos1, newPos2)
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def _AdjustSashPosition(self, idx, newPos1, newPos2=-1, adjustNeighbor=False):
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total = newPos1 + newPos2
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# these are the windows on either side of the sash
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win1 = self._windows[idx]
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win2 = self._windows[idx+1]
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# make adjustments for window min sizes
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minSize = self._GetWindowMin(win1)
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if minSize == -1 or self._minimumPaneSize > minSize:
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minSize = self._minimumPaneSize
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minSize += self._GetBorderSize()
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if newPos1 < minSize:
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newPos1 = minSize
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newPos2 = total - newPos1
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if adjustNeighbor:
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minSize = self._GetWindowMin(win2)
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if minSize == -1 or self._minimumPaneSize > minSize:
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minSize = self._minimumPaneSize
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minSize += self._GetBorderSize()
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if newPos2 < minSize:
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newPos2 = minSize
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newPos1 = total - newPos2
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return (newPos1, newPos2)
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def _DoSetSashPosition(self, idx, newPos1, newPos2=-1, adjustNeighbor=False):
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newPos1, newPos2 = self._AdjustSashPosition(idx, newPos1, newPos2, adjustNeighbor)
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if newPos1 == self._sashes[idx]:
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return False
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self._sashes[idx] = newPos1
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if adjustNeighbor:
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self._sashes[idx+1] = newPos2
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return True
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def _SetSashPositionAndNotify(self, idx, newPos1, newPos2=-1, adjustNeighbor=False):
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# TODO: what is the thing about _requestedSashPosition for?
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self._DoSetSashPosition(idx, newPos1, newPos2, adjustNeighbor)
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evt = MultiSplitterEvent(
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wx.wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED, self)
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evt.SetSashIdx(idx)
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evt.SetSashPosition(newPos1)
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self._DoSendEvent(evt)
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if adjustNeighbor:
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evt.SetSashIdx(idx+1)
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evt.SetSashPosition(newPos2)
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self._DoSendEvent(evt)
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def _GetMotionDiff(self, x, y):
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# find the diff from the old pos
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if self._orient == wx.HORIZONTAL:
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diff = x - self._oldX
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else:
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diff = y - self._oldY
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return diff
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def _SashToCoord(self, idx, sashPos):
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coord = 0
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for i in range(idx):
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coord += self._sashes[i]
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coord += self._GetSashSize()
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coord += sashPos
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return coord
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def _GetWindowMin(self, window):
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if self._orient == wx.HORIZONTAL:
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return window.GetMinWidth()
|
|
else:
|
|
return window.GetMinHeight()
|
|
|
|
|
|
def _GetSashSize(self):
|
|
if self.HasFlag(wx.SP_NOSASH):
|
|
return 0
|
|
if wx.VERSION >= _RENDER_VER:
|
|
return wx.RendererNative.Get().GetSplitterParams(self).widthSash
|
|
else:
|
|
return 5
|
|
|
|
|
|
def _GetBorderSize(self):
|
|
if wx.VERSION >= _RENDER_VER:
|
|
return wx.RendererNative.Get().GetSplitterParams(self).border
|
|
else:
|
|
return 0
|
|
|
|
|
|
def _DrawSash(self, dc):
|
|
if wx.VERSION >= _RENDER_VER:
|
|
if self.HasFlag(wx.SP_3DBORDER):
|
|
wx.RendererNative.Get().DrawSplitterBorder(
|
|
self, dc, self.GetClientRect())
|
|
|
|
# if there are no splits then we're done.
|
|
if len(self._windows) < 2:
|
|
return
|
|
|
|
# if we are not supposed to use a sash then we're done.
|
|
if self.HasFlag(wx.SP_NOSASH):
|
|
return
|
|
|
|
# Reverse the sense of the orientation, in this case it refers
|
|
# to the direction to draw the sash not the direction that
|
|
# windows are stacked.
|
|
orient = { wx.HORIZONTAL : wx.VERTICAL,
|
|
wx.VERTICAL : wx.HORIZONTAL }[self._orient]
|
|
|
|
flag = 0
|
|
if self._isHot:
|
|
flag = wx.CONTROL_CURRENT
|
|
|
|
pos = 0
|
|
for sash in self._sashes[:-1]:
|
|
pos += sash
|
|
if wx.VERSION >= _RENDER_VER:
|
|
wx.RendererNative.Get().DrawSplitterSash(self, dc,
|
|
self.GetClientSize(),
|
|
pos, orient, flag)
|
|
else:
|
|
dc.SetPen(wx.TRANSPARENT_PEN)
|
|
dc.SetBrush(wx.Brush(self.GetBackgroundColour()))
|
|
sashsize = self._GetSashSize()
|
|
if orient == wx.VERTICAL:
|
|
x = pos
|
|
y = 0
|
|
w = sashsize
|
|
h = self.GetClientSize().height
|
|
else:
|
|
x = 0
|
|
y = pos
|
|
w = self.GetClientSize().width
|
|
h = sashsize
|
|
dc.DrawRectangle(x, y, w, h)
|
|
|
|
pos += self._GetSashSize()
|
|
|
|
|
|
def _DrawSashTracker(self, x, y):
|
|
# Draw a line to represent the dragging sash, for when not
|
|
# doing live updates
|
|
w, h = self.GetClientSize()
|
|
dc = wx.ScreenDC()
|
|
|
|
if self._orient == wx.HORIZONTAL:
|
|
x1 = x
|
|
y1 = 2
|
|
x2 = x
|
|
y2 = h-2
|
|
if x1 > w:
|
|
x1 = w
|
|
x2 = w
|
|
elif x1 < 0:
|
|
x1 = 0
|
|
x2 = 0
|
|
else:
|
|
x1 = 2
|
|
y1 = y
|
|
x2 = w-2
|
|
y2 = y
|
|
if y1 > h:
|
|
y1 = h
|
|
y2 = h
|
|
elif y1 < 0:
|
|
y1 = 0
|
|
y2 = 0
|
|
|
|
x1, y1 = self.ClientToScreenXY(x1, y1)
|
|
x2, y2 = self.ClientToScreenXY(x2, y2)
|
|
|
|
dc.SetLogicalFunction(wx.INVERT)
|
|
dc.SetPen(self._sashTrackerPen)
|
|
dc.SetBrush(wx.TRANSPARENT_BRUSH)
|
|
dc.DrawLine(x1, y1, x2, y2)
|
|
dc.SetLogicalFunction(wx.COPY)
|
|
|
|
|
|
def _SashHitTest(self, x, y, tolerance=5):
|
|
# if there are no splits then we're done.
|
|
if len(self._windows) < 2:
|
|
return -1
|
|
|
|
if self._orient == wx.HORIZONTAL:
|
|
z = x
|
|
else:
|
|
z = y
|
|
|
|
pos = 0
|
|
for idx, sash in enumerate(self._sashes[:-1]):
|
|
pos += sash
|
|
hitMin = pos - tolerance
|
|
hitMax = pos + self._GetSashSize() + tolerance
|
|
|
|
if z >= hitMin and z <= hitMax:
|
|
return idx
|
|
|
|
pos += self._GetSashSize()
|
|
|
|
return -1
|
|
|
|
|
|
def _SizeWindows(self):
|
|
# no windows yet?
|
|
if not self._windows:
|
|
return
|
|
|
|
# are there any pending size settings?
|
|
for window, spos in self._pending.items():
|
|
idx = self._windows.index(window)
|
|
# TODO: this may need adjusted to make sure they all fit
|
|
# in the current client size
|
|
self._sashes[idx] = spos
|
|
del self._pending[window]
|
|
|
|
# are there any that still have a -1?
|
|
for idx, spos in enumerate(self._sashes[:-1]):
|
|
if spos == -1:
|
|
# TODO: this should also be adjusted
|
|
self._sashes[idx] = 100
|
|
|
|
cw, ch = self.GetClientSize()
|
|
border = self._GetBorderSize()
|
|
sash = self._GetSashSize()
|
|
|
|
if len(self._windows) == 1:
|
|
# there's only one, it's an easy layout
|
|
self._windows[0].SetDimensions(border, border,
|
|
cw - 2*border, ch - 2*border)
|
|
else:
|
|
if 'wxMSW' in wx.PlatformInfo:
|
|
self.Freeze()
|
|
if self._orient == wx.HORIZONTAL:
|
|
x = y = border
|
|
h = ch - 2*border
|
|
for idx, spos in enumerate(self._sashes[:-1]):
|
|
self._windows[idx].SetDimensions(x, y, spos, h)
|
|
x += spos + sash
|
|
# last one takes the rest of the space. TODO make this configurable
|
|
last = cw - 2*border - x
|
|
self._windows[idx+1].SetDimensions(x, y, last, h)
|
|
if last > 0:
|
|
self._sashes[idx+1] = last
|
|
else:
|
|
x = y = border
|
|
w = cw - 2*border
|
|
for idx, spos in enumerate(self._sashes[:-1]):
|
|
self._windows[idx].SetDimensions(x, y, w, spos)
|
|
y += spos + sash
|
|
# last one takes the rest of the space. TODO make this configurable
|
|
last = ch - 2*border - y
|
|
self._windows[idx+1].SetDimensions(x, y, w, last)
|
|
if last > 0:
|
|
self._sashes[idx+1] = last
|
|
if 'wxMSW' in wx.PlatformInfo:
|
|
self.Thaw()
|
|
|
|
self._DrawSash(wx.ClientDC(self))
|
|
self._needUpdating = False
|
|
|
|
|
|
def _DoSendEvent(self, evt):
|
|
return not self.GetEventHandler().ProcessEvent(evt) or evt.IsAllowed()
|
|
|
|
#----------------------------------------------------------------------
|
|
|
|
class MultiSplitterEvent(wx.PyCommandEvent):
|
|
"""
|
|
This event class is almost the same as `wx.SplitterEvent` except
|
|
it adds an accessor for the sash index that is being changed. The
|
|
same event type IDs and event binders are used as with
|
|
`wx.SplitterEvent`.
|
|
"""
|
|
def __init__(self, type=wx.wxEVT_NULL, splitter=None):
|
|
wx.PyCommandEvent.__init__(self, type)
|
|
if splitter:
|
|
self.SetEventObject(splitter)
|
|
self.SetId(splitter.GetId())
|
|
self.sashIdx = -1
|
|
self.sashPos = -1
|
|
self.isAllowed = True
|
|
|
|
def SetSashIdx(self, idx):
|
|
self.sashIdx = idx
|
|
|
|
def SetSashPosition(self, pos):
|
|
self.sashPos = pos
|
|
|
|
def GetSashIdx(self):
|
|
return self.sashIdx
|
|
|
|
def GetSashPosition(self):
|
|
return self.sashPos
|
|
|
|
# methods from wx.NotifyEvent
|
|
def Veto(self):
|
|
self.isAllowed = False
|
|
def Allow(self):
|
|
self.isAllowed = True
|
|
def IsAllowed(self):
|
|
return self.isAllowed
|
|
|
|
|
|
|
|
#----------------------------------------------------------------------
|
|
|
|
|
|
|