author | Edouard Tisserant <edouard.tisserant@gmail.com> |
Sun, 13 Feb 2022 21:05:19 +0100 | |
branch | wxPython4 |
changeset 3426 | c2c366964913 |
parent 3306 | 841fb2ee1213 |
child 3746 | 41be039fbb8c |
permissions | -rw-r--r-- |
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#!/usr/bin/env python |
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# -*- coding: utf-8 -*- |
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# This file is part of Beremiz, a Integrated Development Environment for |
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# programming IEC 61131-3 automates supporting plcopen standard and CanFestival. |
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# |
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# Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD |
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# |
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# See COPYING file for copyrights details. |
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# |
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# This program is free software; you can redistribute it and/or |
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# modify it under the terms of the GNU General Public License |
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# as published by the Free Software Foundation; either version 2 |
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# of the License, or (at your option) any later version. |
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# |
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# This program is distributed in the hope that it will be useful, |
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# but WITHOUT ANY WARRANTY; without even the implied warranty of |
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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# GNU General Public License for more details. |
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# |
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# You should have received a copy of the GNU General Public License |
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# along with this program; if not, write to the Free Software |
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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from __future__ import absolute_import |
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import wx |
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from graphics.GraphicCommons import GetScaledEventPosition |
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# ------------------------------------------------------------------------------- |
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# Viewer RubberBand |
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# ------------------------------------------------------------------------------- |
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class RubberBand(object): |
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""" |
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Class that implements a rubberband for graphic Viewers |
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""" |
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def __init__(self, viewer): |
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""" |
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Constructor |
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@param viewer: Viewer on which rubberband must be drawn |
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""" |
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self.Viewer = viewer |
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# wx.Panel on which rubberband will be drawn |
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self.DrawingSurface = viewer.Editor |
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self.Reset() |
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def Reset(self): |
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""" |
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Initialize internal attributes of rubberband |
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""" |
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self.StartPoint = None |
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self.CurrentBBox = None |
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self.LastBBox = None |
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def IsShown(self): |
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""" |
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Indicate if rubberband is drawn on viewer |
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@return: True if rubberband is drawn |
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""" |
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return self.CurrentBBox is not None |
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def GetCurrentExtent(self): |
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""" |
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Return the rubberband bounding box |
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@return: Rubberband bounding box (wx.Rect object) |
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""" |
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# In case of rubberband not shown, return the last rubberband |
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# bounding box |
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if self.IsShown(): |
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return self.CurrentBBox |
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return self.LastBBox |
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def OnLeftDown(self, event, dc, scaling): |
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""" |
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Called when left mouse is pressed on Viewer. Starts to edit a new |
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rubberband bounding box |
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@param event: Mouse event |
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@param dc: Device Context of Viewer |
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@param scaling: PLCOpen scaling applied on Viewer |
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""" |
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# Save the point where mouse was pressed in Viewer unit, position may |
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# be modified by scroll and zoom applied on viewer |
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self.StartPoint = GetScaledEventPosition(event, dc, scaling) |
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# Initialize rubberband bounding box |
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self.CurrentBBox = wx.Rect(self.StartPoint.x, self.StartPoint.y, 0, 0) |
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# Change viewer mouse cursor to reflect a rubberband bounding box is |
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# edited |
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self.DrawingSurface.SetCursor(wx.Cursor(wx.CURSOR_CROSS)) |
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self.Redraw() |
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def OnMotion(self, event, dc, scaling): |
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""" |
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Called when mouse is dragging over Viewer. Update the current edited |
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rubberband bounding box |
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@param event: Mouse event |
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@param dc: Device Context of Viewer |
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@param scaling: PLCOpen scaling applied on Viewer |
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""" |
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# Get mouse position in Viewer unit, position may be modified by scroll |
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# and zoom applied on viewer |
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pos = GetScaledEventPosition(event, dc, scaling) |
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# Save the last bounding box drawn for erasing it later |
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self.LastBBox = wx.Rect(0, 0, 0, 0) |
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self.LastBBox.Union(self.CurrentBBox) |
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# Calculate new position and size of the box |
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self.CurrentBBox.x = min(pos.x, self.StartPoint.x) |
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self.CurrentBBox.y = min(pos.y, self.StartPoint.y) |
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self.CurrentBBox.width = abs(pos.x - self.StartPoint.x) + 1 |
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self.CurrentBBox.height = abs(pos.y - self.StartPoint.y) + 1 |
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self.Redraw() |
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def OnLeftUp(self, event, dc, scaling): |
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""" |
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Called when mouse is release from Viewer. Erase the current edited |
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rubberband bounding box |
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@param event: Mouse event |
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@param dc: Device Context of Viewer |
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@param scaling: PLCOpen scaling applied on Viewer |
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""" |
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# Change viewer mouse cursor to default |
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self.DrawingSurface.SetCursor(wx.NullCursor) |
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# Save the last edited bounding box |
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self.LastBBox = self.CurrentBBox |
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self.CurrentBBox = None |
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self.Redraw() |
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def DrawBoundingBoxes(self, bboxes, dc=None): |
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""" |
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Draw a list of bounding box on Viewer in the order given using XOR |
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logical function |
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@param bboxes: List of bounding boxes to draw on viewer |
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@param dc: Device Context of Viewer (default None) |
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""" |
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# Get viewer Device Context if not given |
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if dc is None: |
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dc = self.Viewer.GetLogicalDC() |
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# Save current viewer scale factors before resetting them in order to |
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# avoid rubberband pen to be scaled |
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scalex, scaley = dc.GetUserScale() |
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dc.SetUserScale(1, 1) |
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# Set DC drawing style |
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dc.SetPen(wx.Pen(wx.WHITE, style=wx.DOT)) |
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dc.SetBrush(wx.TRANSPARENT_BRUSH) |
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dc.SetLogicalFunction(wx.XOR) |
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# Draw the bounding boxes using viewer scale factor |
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for bbox in bboxes: |
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if bbox is not None: |
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dc.DrawRectangle( |
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bbox.x * scalex, bbox.y * scaley, |
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bbox.width * scalex, bbox.height * scaley) |
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dc.SetLogicalFunction(wx.COPY) |
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# Restore Viewer scale factor |
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dc.SetUserScale(scalex, scaley) |
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def Redraw(self, dc=None): |
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""" |
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Redraw rubberband on Viewer |
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@param dc: Device Context of Viewer (default None) |
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""" |
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# Erase last bbox and draw current bbox |
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self.DrawBoundingBoxes([self.LastBBox, self.CurrentBBox], dc) |
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def Erase(self, dc=None): |
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""" |
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Erase rubberband from Viewer |
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@param dc: Device Context of Viewer (default None) |
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""" |
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# Erase last bbox |
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self.DrawBoundingBoxes([self.LastBBox], dc) |
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def Draw(self, dc=None): |
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""" |
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Draw rubberband on Viewer |
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@param dc: Device Context of Viewer (default None) |
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""" |
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# Erase last bbox and draw current bbox |
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self.DrawBoundingBoxes([self.CurrentBBox], dc) |
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def PatchRubberBandForGTK3(): |
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""" |
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GTK3 implementation of DC doesn't support SetLogicalFuntion(XOR) |
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Then Rubberband can't be erased by just redrawing it on the same place |
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So this is a complete refresh instead, eating a lot of CPU. |
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""" |
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def Redraw(self, dc=None): |
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self.Viewer.Refresh() |
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self.Draw() |
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RubberBand.Redraw = Redraw |
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def Erase(self, dc=None): |
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self.Viewer.Refresh() |
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RubberBand.Erase = Erase |
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if "gtk3" in wx.PlatformInfo: |
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PatchRubberBandForGTK3() |