Source Code for Module mcbase.libs.reportviewer.viewer

  1  # -*- coding: utf-8 -*- 
  2   
  3  ########################################################################## 
  4  # viewer.py 
  5  # 
  6  # Gösterim ekranı 
  7  # 
  8  # (C) 2007 Likya Yazılım ve Bilişim Hizmetleri Ltd. Şti. 
  9  ########################################################################## 
 10   
 11  from PyQt4.QtCore import * 
 12  from PyQt4.QtGui import * 
 13   
 14  from plainpagewrapper import * 
 15   
 16 -class Viewer(QGraphicsView): 
 17       
 18      BACKGROUND_COLOR = QColor(160, 160, 164) 
 19      MARGIN = 5 
 20      WIDTH = 0 
 21      HEIGHT = 0 
 22       
 23 -    def __init__(self, parent): 
 24          ''' 
 25          Gösterim ekranı için toolbarı oluşturur. 
 26          ''' 
 27          QGraphicsView.__init__(self, parent) 
 28           
 29          self.setScene(QGraphicsScene(self)) 
 30          self.setCacheMode(QGraphicsView.CacheBackground) 
 31          self.setTransformationAnchor(QGraphicsView.AnchorUnderMouse) 
 32          self.setResizeAnchor(QGraphicsView.AnchorViewCenter) 
 33          self.setDragMode(QGraphicsView.ScrollHandDrag) 
 34          self.setViewportUpdateMode(QGraphicsView.SmartViewportUpdate) 
 35           
 36          # Zemin rengini değiştiriyoruz. 
 37          self.scene().setBackgroundBrush(Viewer.BACKGROUND_COLOR) 
 38           
 39          # Görünümdeki sayfalar. 
 40          self._pages = [] 
 41       
 42 -    def clearPages(self): 
 43          ''' 
 44          Tüm sayfaları siler. 
 45          ''' 
 46          for page in self._pages: 
 47              self.scene().removeItem(page) 
 48           
 49          self._pages = [] 
 50       
 51 -    def addPages(self, pageSource): 
 52          ''' 
 53          Gerektiği kadar sayfayı ekler. 
 54          ''' 
 55          for pageNumber in xrange(pageSource.numberOfPages()): 
 56              pageWrapper = PlainPageWrapper(pageSource) 
 57              pageWrapper.setPageNumber(pageNumber) 
 58              self.scene().addItem(pageWrapper) 
 59              self._pages.append(pageWrapper) 
 60       
 61 -    def gotoPage(self, pageNumber): 
 62          ''' 
 63          İstenilen sayfanın başına gider. 
 64          ''' 
 65          pageNumber = max(pageNumber, 1) 
 66          pageNumber = min(pageNumber, len(self._pages)) 
 67           
 68          page = self._pages[pageNumber - 1] 
 69          pos = page.scenePos() 
 70           
 71          width = self.viewport().width() 
 72          height = self.viewport().height() 
 73           
 74          pos.setX(pos.x() + width / 2.0 - Viewer.MARGIN) 
 75          pos.setY(pos.y() + height / 2.0 - Viewer.MARGIN) 
 76           
 77          self.centerOn(pos) 
 78           
 79          self.emit(SIGNAL('setPageNumberText(int)'), pageNumber) 
 80       
 81 -    def layoutPages(self): 
 82          ''' 
 83          Rapor sayfalarını ilgili layout'a göre düzgünce yerleştirir. 
 84          ''' 
 85          x = Viewer.MARGIN 
 86          y = Viewer.MARGIN 
 87           
 88          for page in self._pages: 
 89              page.setPos(x, y) 
 90               
 91              y += page.height() 
 92       
 93 -    def textItems(self): 
 94          ''' 
 95          Görünüm içerisindeki yazı alanlarını döndürür. 
 96          ''' 
 97          return filter(lambda x: isinstance(x, QGraphicsTextItem), self.scene().items()) 
 98       
 99 -    def adjustContentsSize(self): 
100          ''' 
101          Nesnelerin kapladığı alana göre scroll barları yeniden ayarlar. 
102          ''' 
103          itemsBoundingRect = self.scene().itemsBoundingRect() 
104           
105          margin = Viewer.MARGIN 
106          scrollBarWidth = self.verticalScrollBar().width() 
107          self.scene().setSceneRect(itemsBoundingRect.adjusted(-margin, -margin, margin, 0)) 
108       
109 -    def resizeEvent(self, e): 
110          ''' 
111          Scroll view'in boyu değiştiğinde, görünümü ortalar. 
112          ''' 
113          QGraphicsView.resizeEvent(self, e) 
114           
115          Viewer.WIDTH = self.viewport().width() - Viewer.MARGIN 
116          Viewer.HEIGHT = self.viewport().height() - Viewer.MARGIN 
117       
118 -    def scrollContentsBy(self, dx, dy): 
119          ''' 
120          Rapor sürüklendiğinde sayfa numarasını günceller. 
121          ''' 
122          QGraphicsView.scrollContentsBy(self, dx, dy) 
123           
124          width = self.viewport().width() 
125          height = self.viewport().height() 
126           
127          x = width / 2.0 
128          y = height / 2.0 
129           
130          for item in self.items(x, y): 
131              if hasattr(item, 'pageNumber'): 
132                  self.emit(SIGNAL('setPageNumberText(int)'), item.pageNumber() + 1) 
133