b2f6eb0606
namespace rename the submodule to have a leading underscore to make it easier to document it that way. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@27634 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
361 lines
14 KiB
Python
361 lines
14 KiB
Python
# -*- coding: iso-8859-1 -*-
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#----------------------------------------------------------------------------
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# Name: canvas.py
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# Purpose: The canvas class
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#
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# Author: Pierre Hjälm (from C++ original by Julian Smart)
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#
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# Created: 2004-05-08
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# RCS-ID: $Id$
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# Copyright: (c) 2004 Pierre Hjälm - 1998 Julian Smart
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# Licence: wxWindows license
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#----------------------------------------------------------------------------
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from __future__ import division
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import wx
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from _lines import LineShape
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from _composit import *
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NoDragging, StartDraggingLeft, ContinueDraggingLeft, StartDraggingRight, ContinueDraggingRight = 0, 1, 2, 3, 4
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KEY_SHIFT, KEY_CTRL = 1, 2
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# Helper function: True if 'contains' wholly contains 'contained'.
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def WhollyContains(contains, contained):
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xp1, yp1 = contains.GetX(), contains.GetY()
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xp2, yp2 = contained.GetX(), contained.GetY()
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w1, h1 = contains.GetBoundingBoxMax()
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w2, h2 = contained.GetBoundingBoxMax()
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left1 = xp1-w1 / 2.0
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top1 = yp1-h1 / 2.0
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right1 = xp1 + w1 / 2.0
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bottom1 = yp1 + h1 / 2.0
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left2 = xp2-w2 / 2.0
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top2 = yp2-h2 / 2.0
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right2 = xp2 + w2 / 2.0
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bottom2 = yp2 + h2 / 2.0
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return ((left1 <= left2) and (top1 <= top2) and (right1 >= right2) and (bottom1 >= bottom2))
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class ShapeCanvas(wx.ScrolledWindow):
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def __init__(self, parent = None, id=-1, pos = wx.DefaultPosition, size = wx.DefaultSize, style = wx.BORDER, name="ShapeCanvas"):
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wx.ScrolledWindow.__init__(self, parent, id, pos, size, style, name)
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self._shapeDiagram = None
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self._dragState = NoDragging
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self._draggedShape = None
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self._oldDragX = 0
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self._oldDragY = 0
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self._firstDragX = 0
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self._firstDragY = 0
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self._checkTolerance = True
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wx.EVT_PAINT(self, self.OnPaint)
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wx.EVT_MOUSE_EVENTS(self, self.OnMouseEvent)
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def SetDiagram(self, diag):
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self._shapeDiagram = diag
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def GetDiagram(self):
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return self._shapeDiagram
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def OnPaint(self, evt):
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dc = wx.PaintDC(self)
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self.PrepareDC(dc)
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dc.SetBackground(wx.Brush(self.GetBackgroundColour(), wx.SOLID))
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dc.Clear()
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if self.GetDiagram():
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self.GetDiagram().Redraw(dc)
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def OnMouseEvent(self, evt):
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dc = wx.ClientDC(self)
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self.PrepareDC(dc)
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x, y = evt.GetLogicalPosition(dc)
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keys = 0
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if evt.ShiftDown():
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keys |= KEY_SHIFT
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if evt.ControlDown():
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keys |= KEY_CTRL
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dragging = evt.Dragging()
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# Check if we're within the tolerance for mouse movements.
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# If we're very close to the position we started dragging
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# from, this may not be an intentional drag at all.
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if dragging:
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dx = abs(dc.LogicalToDeviceX(x-self._firstDragX))
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dy = abs(dc.LogicalToDeviceY(y-self._firstDragY))
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if self._checkTolerance and (dx <= self.GetDiagram().GetMouseTolerance()) and (dy <= self.GetDiagram().GetMouseTolerance()):
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return
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# If we've ignored the tolerance once, then ALWAYS ignore
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# tolerance in this drag, even if we come back within
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# the tolerance range.
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self._checkTolerance = False
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# Dragging - note that the effect of dragging is left entirely up
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# to the object, so no movement is done unless explicitly done by
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# object.
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if dragging and self._draggedShape and self._dragState == StartDraggingLeft:
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self._dragState = ContinueDraggingLeft
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# If the object isn't m_draggable, transfer message to canvas
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if self._draggedShape.Draggable():
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self._draggedShape.GetEventHandler().OnBeginDragLeft(x, y, keys, self._draggedAttachment)
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else:
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self._draggedShape = None
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self.OnBeginDragLeft(x, y, keys)
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self._oldDragX, self._oldDragY = x, y
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elif dragging and self._draggedShape and self._dragState == ContinueDraggingLeft:
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# Continue dragging
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self._draggedShape.GetEventHandler().OnDragLeft(False, self._oldDragX, self._oldDragY, keys, self._draggedAttachment)
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self._draggedShape.GetEventHandler().OnDragLeft(True, x, y, keys, self._draggedAttachment)
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self._oldDragX, self._oldDragY = x, y
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elif evt.LeftUp and self._draggedShape and self._dragState == ContinueDraggingLeft:
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self._dragState = NoDragging
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self._checkTolerance = True
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self._draggedShape.GetEventHandler().OnDragLeft(False, self._oldDragX, self._oldDragY, keys, self._draggedAttachment)
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self._draggedShape.GetEventHandler().OnEndDragLeft(x, y, keys, self._draggedAttachment)
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self._draggedShape = None
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elif dragging and self._draggedShape and self._dragState == StartDraggingRight:
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self._dragState = ContinueDraggingRight
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if self._draggedShape.Draggable:
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self._draggedShape.GetEventHandler().OnBeginDragRight(x, y, keys, self._draggedAttachment)
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else:
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self._draggedShape = None
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self.OnBeginDragRight(x, y, keys)
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self._oldDragX, self._oldDragY = x, y
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elif dragging and self._draggedShape and self._dragState == ContinueDraggingRight:
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# Continue dragging
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self._draggedShape.GetEventHandler().OnDragRight(False, self._oldDragX, self._oldDragY, keys, self._draggedAttachment)
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self._draggedShape.GetEventHandler().OnDragRight(True, x, y, keys, self._draggedAttachment)
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self._oldDragX, self._oldDragY = x, y
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elif evt.RightUp() and self._draggedShape and self._dragState == ContinueDraggingRight:
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self._dragState = NoDragging
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self._checkTolerance = True
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self._draggedShape.GetEventHandler().OnDragRight(False, self._oldDragX, self._oldDragY, keys, self._draggedAttachment)
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self._draggedShape.GetEventHandler().OnEndDragRight(x, y, keys, self._draggedAttachment)
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self._draggedShape = None
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# All following events sent to canvas, not object
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elif dragging and not self._draggedShape and self._dragState == StartDraggingLeft:
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self._dragState = ContinueDraggingLeft
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self.OnBeginDragLeft(x, y, keys)
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self._oldDragX, self._oldDragY = x, y
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elif dragging and not self._draggedShape and self._dragState == ContinueDraggingLeft:
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# Continue dragging
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self.OnDragLeft(False, self._oldDragX, self._oldDragY, keys)
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self.OnDragLeft(True, x, y, keys)
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self._oldDragX, self._oldDragY = x, y
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elif evt.LeftUp() and not self._draggedShape and self._dragState == ContinueDraggingLeft:
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self._dragState = NoDragging
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self._checkTolerance = True
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self.OnDragLeft(False, self._oldDragX, self._oldDragY, keys)
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self.OnEndDragLeft(x, y, keys)
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self._draggedShape = None
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elif dragging and not self._draggedShape and self._dragState == StartDraggingRight:
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self._dragState = ContinueDraggingRight
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self.OnBeginDragRight(x, y, keys)
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self._oldDragX, self._oldDragY = x, y
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elif dragging and not self._draggedShape and self._dragState == ContinueDraggingRight:
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# Continue dragging
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self.OnDragRight(False, self._oldDragX, self._oldDragY, keys)
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self.OnDragRight(True, x, y, keys)
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self._oldDragX, self._oldDragY = x, y
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elif evt.RightUp() and not self._draggedShape and self._dragState == ContinueDraggingRight:
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self._dragState = NoDragging
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self._checkTolerance = True
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self.OnDragRight(False, self._oldDragX, self._oldDragY, keys)
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self.OnEndDragRight(x, y, keys)
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self._draggedShape = None
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# Non-dragging events
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elif evt.IsButton():
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self._checkTolerance = True
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# Find the nearest object
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attachment = 0
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nearest_object, attachment = self.FindShape(x, y)
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if nearest_object: # Object event
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if evt.LeftDown():
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self._draggedShape = nearest_object
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self._draggedAttachment = attachment
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self._dragState = StartDraggingLeft
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self._firstDragX = x
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self._firstDragY = y
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elif evt.LeftUp():
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# N.B. Only register a click if the same object was
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# identified for down *and* up.
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if nearest_object == self._draggedShape:
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nearest_object.GetEventHandler().OnLeftClick(x, y, keys, attachment)
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self._draggedShape = None
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self._dragState = NoDragging
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elif evt.LeftDClick():
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nearest_object.GetEventHandler().OnLeftDoubleClick(x, y, keys, attachment)
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self._draggedShape = None
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self._dragState = NoDragging
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elif evt.RightDown():
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self._draggedShape = nearest_object
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self._draggedAttachment = attachment
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self._dragState = StartDraggingRight
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self._firstDragX = x
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self._firstDragY = y
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elif evt.RightUp():
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if nearest_object == self._draggedShape:
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nearest_object.GetEventHandler().OnRightClick(x, y, keys, attachment)
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self._draggedShape = None
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self._dragState = NoDragging
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else: # Canvas event
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if evt.LeftDown():
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self._draggedShape = None
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self._dragState = StartDraggingLeft
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self._firstDragX = x
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self._firstDragY = y
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elif evt.LeftUp():
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self.OnLeftClick(x, y, keys)
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self._draggedShape = None
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self._dragState = NoDragging
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elif evt.RightDown():
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self._draggedShape = None
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self._dragState = StartDraggingRight
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self._firstDragX = x
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self._firstDragY = y
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elif evt.RightUp():
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self.OnRightClick(x, y, keys)
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self._draggedShape = None
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self._dragState = NoDragging
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def FindShape(self, x, y, info = None, notObject = None):
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nearest = 100000.0
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nearest_attachment = 0
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nearest_object = None
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# Go backward through the object list, since we want:
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# (a) to have the control points drawn LAST to overlay
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# the other objects
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# (b) to find the control points FIRST if they exist
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for object in self.GetDiagram().GetShapeList()[::-1]:
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# First pass for lines, which might be inside a container, so we
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# want lines to take priority over containers. This first loop
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# could fail if we clickout side a line, so then we'll
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# try other shapes.
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if object.IsShown() and \
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isinstance(object, LineShape) and \
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object.HitTest(x, y) and \
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((info == None) or isinstance(object, info)) and \
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(not notObject or not notObject.HasDescendant(object)):
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temp_attachment, dist = object.HitTest(x, y)
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# A line is trickier to spot than a normal object.
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# For a line, since it's the diagonal of the box
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# we use for the hit test, we may have several
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# lines in the box and therefore we need to be able
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# to specify the nearest point to the centre of the line
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# as our hit criterion, to give the user some room for
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# manouevre.
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if dist<nearest:
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nearest = dist
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nearest_object = object
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nearest_attachment = temp_attachment
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for object in self.GetDiagram().GetShapeList()[::-1]:
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# On second pass, only ever consider non-composites or
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# divisions. If children want to pass up control to
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# the composite, that's up to them.
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if (object.IsShown() and
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(isinstance(object, DivisionShape) or
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not isinstance(object, CompositeShape)) and
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object.HitTest(x, y) and
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(info == None or isinstance(object, info)) and
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(not notObject or not notObject.HasDescendant(object))):
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temp_attachment, dist = object.HitTest(x, y)
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if not isinstance(object, LineShape):
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# If we've hit a container, and we have already
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# found a line in the first pass, then ignore
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# the container in case the line is in the container.
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# Check for division in case line straddles divisions
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# (i.e. is not wholly contained).
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if not nearest_object or not (isinstance(object, DivisionShape) or WhollyContains(object, nearest_object)):
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nearest_object = object
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nearest_attachment = temp_attachment
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break
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return nearest_object, nearest_attachment
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def AddShape(self, object, addAfter = None):
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self.GetDiagram().AddShape(object, addAfter)
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def InsertShape(self, object):
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self.GetDiagram().InsertShape(object)
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def RemoveShape(self, object):
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self.GetDiagram().RemoveShape(object)
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def GetQuickEditMode(self):
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return self.GetDiagram().GetQuickEditMode()
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def Redraw(self, dc):
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self.GetDiagram().Redraw(dc)
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def Snap(self, x, y):
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return self.GetDiagram().Snap(x, y)
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def OnLeftClick(self, x, y, keys = 0):
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pass
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def OnRightClick(self, x, y, keys = 0):
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pass
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def OnDragLeft(self, draw, x, y, keys = 0):
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pass
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def OnBeginDragLeft(self, x, y, keys = 0):
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pass
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def OnEndDragLeft(self, x, y, keys = 0):
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pass
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def OnDragRight(self, draw, x, y, keys = 0):
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pass
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def OnBeginDragRight(self, x, y, keys = 0):
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pass
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def OnEndDragRight(self, x, y, keys = 0):
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pass
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