class MListWidget(QListWidget):
'''Allows setting HTML items instead of just text.
This is a nasty hack, unfortunately - thanks to some unfortunate Qt API decicions (QLabel inconsistently hides certain internals :( )
'''
gainedFocus = pyqtSignal()
lostFocus = pyqtSignal()
def __init__(self, parent = None):
QListWidget.__init__(self, parent)
self._htmlItemLabel = None
self._htmlItemWidget = None
self._htmlItemWidgetFinishedLoading = False
self._prepHtmlItemWidget()
#def focusInEvent(self, event):
#self.gainedFocus.emit()
#event.accept()
#QListWidget.focusInEvent(self, event)
#def focusOutEvent(self, event):
#self.lostFocus.emit()
#event.accept()
#QListWidget.focusOutEvent(self, event)
#def event(self, event):
#if event.type() == QEvent.InputMethod:
#print 'ionout pmethod'
#self.inputMethodEvent(event)
#elif event.type() == QEvent.KeyPress:
#print 'key pressed'
#return QListWidget.event(self, event)
#@pyqtSignature('QInputMethodEvent')
#def inputMethodEvent(self, event):
#print 'custom input event!'
#print event
def event(self, event):
'''Intercept enter/return presses.
'''
if event.type() == QEvent.KeyPress:
key_press = QKeyEvent(event)
if key_press.key() in [Qt.Key_Enter, Qt.Key_Return]:
self.returnPressed.emit()
return True
return QListWidget.event(self, event)
def _htmlItemWidgetLoadedSignal(self, ok):
self._htmlItemWidgetFinishedLoading = True
def _prepHtmlItemWidget(self):
self._htmlItemWidget = QWebView()
hw = self._htmlItemWidget
hw.loadFinished.connect(self._htmlItemWidgetLoadedSignal)
#TODO hw.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
#hw.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOff)
# font
ws = hw.settings()
font_size = self.font().pointSize()
ws.setFontSize(QWebSettings.DefaultFontSize, font_size)
ws.setFontFamily(QWebSettings.StandardFont, self.font().family())
# transparency
palette = hw.palette()
palette.setBrush(QPalette.Base, Qt.transparent)
hw.page().setPalette(palette)
hw.setAttribute(Qt.WA_OpaquePaintEvent, False)
# better rendering
hw.setRenderHint(QPainter.Antialiasing, True)
hw.setRenderHint(QPainter.TextAntialiasing, True)
hw.setRenderHint(QPainter.SmoothPixmapTransform, True)
hw.setRenderHint(QPainter.HighQualityAntialiasing, True)
hw.setHtml(u'')
h = font_size + 6
hw.setFixedHeight(h)
def addHtmlItem(self, html, data):
'''Adds a new QTextEdit widget containing the given HTMl as an item in the list.
'''
item = QListWidgetItem()
item.setData(Qt.UserRole, data)
self.addItem(item)
item.setSizeHint(self._htmlItemWidget.frameSize())
label = QLabel()
label.setTextInteractionFlags(Qt.NoTextInteraction)
html = u'<html><body style="margin:0px 0px 0px 4px">{0}</body></html>'.format(html)
if '<img' in html:
self._htmlItemWidgetFinishedLoading = False
self._htmlItemWidget.setHtml(html)
pm = QImage(self._htmlItemWidget.size(), QImage.Format_ARGB32)
pm.fill(Qt.transparent)
# wait for it to finish loading, then render
q_app = QApplication.instance()
while not self._htmlItemWidgetFinishedLoading:
q_app.processEvents(QEventLoop.WaitForMoreEvents | QEventLoop.ExcludeUserInputEvents)
self._htmlItemWidget.render(pm, flags=QWidget.DrawChildren)
label.setPixmap(QPixmap.fromImage(pm))
else:
label.setText(html)
self.setItemWidget(item, label)
