diff options
Diffstat (limited to 'pynxc/waxy/demos/Rubberband.py')
| -rwxr-xr-x | pynxc/waxy/demos/Rubberband.py | 221 |
1 files changed, 221 insertions, 0 deletions
diff --git a/pynxc/waxy/demos/Rubberband.py b/pynxc/waxy/demos/Rubberband.py new file mode 100755 index 0000000..316850a --- /dev/null +++ b/pynxc/waxy/demos/Rubberband.py @@ -0,0 +1,221 @@ +#!/usr/bin/env python + +from waxy import * + +# Modified from: +# Recipe 189744: wxPython Graphics - Drawing rubberbands over a canvas +# http://code.activestate.com/recipes/189744/ + +class Sprite: + def __init__(self, fname): + self.bitmap = Image(fname+".png").ConvertToBitmap() + self.bitmap_rev = Image(fname+"rev.png").ConvertToBitmap() + self.background = None + self.pos=wx.Point(0,0) + self.reversed=False + + def Draw(self, dc): + # copy background from dc to memory object + memdc = wx.MemoryDC() + memdc.Blit(0, 0, self.bitmap.GetWidth(), self.bitmap.GetHeight(), dc, + self.pos[0], self.pos[1], wx.COPY, 1) + self.background = memdc # keep around for later + + bitmap = self.bitmap if not self.reversed else self.bitmap_rev + dc.DrawBitmap(bitmap, self.pos[0], self.pos[1], 1) + + def HitTest(self, pt): + rect = self.GetRect() + return rect.InsideXY(pt.x, pt.y) + + def Intersects(self, rect): + myrect = self.GetRect() + + # adjust for negative + arect=[val for val in rect] + if arect[2]<0: + arect[0]+=arect[2] + arect[2]=-arect[2] + + if arect[3]<0: + arect[1]+=arect[3] + arect[3]=-arect[3] + + return myrect.Intersects(arect) + + def GetRect(self): + return wx.Rect(self.pos[0], self.pos[1], + self.bitmap.GetWidth(), self.bitmap.GetHeight()) + +class MyCanvas(Canvas): + + def Init(self): + self.SetBackgroundColour('WHITE') + self.SetScrollbars(20, 20, 100, 100) + self.sprite = Sprite('heretic2') + self.sprite.pos=wx.Point(50,50) + + # mouse selection start point + self.m_stpoint=Point(0,0) + # mouse selection end point + self.m_endpoint=Point(0,0) + # mouse selection cache point + self.m_savepoint=Point(0,0) + + # flags for left click/ selection + self._leftclicked=False + self._selected=False + + def OnLeftDown(self,event): + + # Left mouse button down, change cursor to + # something else to denote event capture + self.m_stpoint = event.GetPosition() + self.SetCursor('cross') + + # invalidate current canvas + self.Refresh() + # cache current position + self.m_savepoint = self.m_stpoint + self.m_endpoint = self.m_savepoint + self._selected = False + self._leftclicked = True + + + def OnMotion(self,event): + + if event.Dragging() and self._leftclicked: + + # Draw new rectangle + self.m_endpoint = event.GetPosition() + self.m_savepoint = self.m_endpoint # cache current endpoint + self.Refresh() + + def OnLeftUp(self,event): + + # User released left button, change cursor back + self.SetCursor('arrow') + self._selected = True #selection is done + self._leftclicked = False # end of clicking + self.Refresh() + + def OnDraw(self, dc): + dc.SetTextForeground('BLUE') + dc.SetPen(wx.MEDIUM_GREY_PEN) + for i in range(50): + dc.DrawLine(0, i*10, i*10, 0) + + w = (self.m_endpoint.x - self.m_stpoint.x) + h = (self.m_endpoint.y - self.m_stpoint.y) + rect=self.m_stpoint.x, self.m_stpoint.y, w, h + + if self.sprite.Intersects(rect): + self.sprite.reversed=True + else: + self.sprite.reversed=False + + self.sprite.Draw(dc) + + if not self._selected: + dc.SetLogicalFunction(wx.XOR) + wbrush = wx.Brush(wx.Colour(255,255,255), wx.TRANSPARENT) + wpen = wx.Pen(wx.Colour(200, 200, 200), 1, wx.SOLID) + dc.SetBrush(wbrush) + dc.SetPen(wpen) + + + # Set clipping region to rectangle corners + # dc.SetClippingRegion(self.m_stpoint.x, self.m_stpoint.y, w,h) + dc.DrawRectangle(*rect) + + + + def GetCurrentSelection(self): + """ Return the current selected rectangle """ + + # if there is no selection, selection defaults to + # current viewport + + left = Point(0,0) + right = Point(0,0) + + # user dragged mouse to right + if self.m_endpoint.y > self.m_stpoint.y: + right = self.m_endpoint + left = self.m_stpoint + # user dragged mouse to left + elif self.m_endpoint.y < self.m_stpoint.y: + right = self.m_stpoint + left = self.m_endpoint + + return (left.x, left.y, right.x, right.y) + + + def ClearCurrentSelection(self): + """ Clear the current selected rectangle """ + + box = self.GetCurrentSelection() + + dc=wx.ClientDC(self) + + w = box[2] - box[0] + h = box[3] - box[1] + dc.SetClippingRegion(box[0], box[1], w, h) + dc.SetLogicalFunction(wx.XOR) + + # The brush is not really needed since we + # dont do any filling of the dc. It is set for + # sake of completion. + + wbrush = wx.Brush(wx.Colour(255,255,255), wx.TRANSPARENT) + wpen = wx.Pen(wx.Colour(200, 200, 200), 1, wx.SOLID) + dc.SetBrush(wbrush) + dc.SetPen(wpen) + dc.DrawRectangle(box[0], box[1], w,h) + self._selected = false + + # reset selection to canvas size + self.ResetSelection() + + def ResetSelection(self): + """ Resets the mouse selection to entire canvas """ + + self.m_stpoint = Point(0,0) + sz=self._canvas.GetSize() + w,h=sz.GetWidth(), sz.GetHeight() + self.m_endpoint = wxPoint(w,h) + + +class MainFrame(VerticalFrame): # frame has a sizer built in + + def Body(self): + + + self.CreateStatusBar() + self.SetStatusText("This is the statusbar") + + menubar = MenuBar(self) + menu1 = Menu(self) + menu1.Append("E&xit", self.CloseWindow, "Exit demo",hotkey="Ctrl+Q") + menubar.Append(menu1, "&File") + + + self.canvas = MyCanvas(self) + self.canvas.SetSize((400,300)) + self.AddComponent(self.canvas, expand=1, stretch=1) + + self.Pack() + + self.CenterOnScreen() + + self.Show() + + + def CloseWindow(self,event): + self.Close() + + + +if __name__=="__main__": + app = Application(MainFrame, title=__file__) + app.Run() |