Python Qt.QDrag类代码示例

 def mouseMoveEvent(self, event):
     dex = self.indexAt(event.pos())
     if dex.isValid():
         self.setCursor(Qt.PointingHandCursor)
     else:
         self.unsetCursor()
     if not event.buttons() & Qt.LeftButton:
         return
     if self.in_drag_drop or not dex.isValid():
         QTreeView.mouseMoveEvent(self, event)
         return
     # Must deal with odd case where the node being dragged is 'virtual',
     # created to form a hierarchy. We can't really drag this node, but in
     # addition we can't allow drag recognition to notice going over some
     # other node and grabbing that one. So we set in_drag_drop to prevent
     # this from happening, turning it off when the user lifts the button.
     self.in_drag_drop = True
     if not self._model.flags(dex) & Qt.ItemIsDragEnabled:
         QTreeView.mouseMoveEvent(self, event)
         return
     md = self._model.mimeData([dex])
     pixmap = dex.data(DRAG_IMAGE_ROLE).pixmap(self.iconSize())
     drag = QDrag(self)
     drag.setPixmap(pixmap)
     drag.setMimeData(md)
     if self._model.is_in_user_category(dex):
         drag.exec_(Qt.CopyAction|Qt.MoveAction, Qt.CopyAction)
     else:
         drag.exec_(Qt.CopyAction)

	def __init__(self, parent, url = ''):
		super(WebView, self).__init__(parent)
		self.draging = False
		self.drag = QDrag(self)
		self.webPage = WebPage()
		self.setPage(self.webPage)
		self.mainFrame = self.page().mainFrame()
		self.setAttribute(Qt.WA_DeleteOnClose, True)
		self.titleChanged.connect(parent.setWindowTitle)
		self.load(url)
		webSettings = self.settings()
		webSettings.setDefaultTextEncoding("utf-8")
		# webSettings.setOfflineStorageDefaultQuota(sys.maxsize)
		# webSettings.setOfflineWebApplicationCacheQuota(sys.maxsize)
		webSettings.enablePersistentStorage(assets.fs.dataPath())
		webSettings.setAttribute(QWebSettings.PluginsEnabled, True)
		webSettings.setAttribute(QWebSettings.DnsPrefetchEnabled, True)
		webSettings.setAttribute(QWebSettings.XSSAuditingEnabled, True)
		webSettings.setAttribute(QWebSettings.CSSGridLayoutEnabled, True)
		webSettings.setAttribute(QWebSettings.ScrollAnimatorEnabled, True)
		webSettings.setAttribute(QWebSettings.DeveloperExtrasEnabled, True)
		webSettings.setAttribute(QWebSettings.JavascriptCanOpenWindows, True)
		webSettings.setAttribute(QWebSettings.JavascriptCanCloseWindows, True)
		webSettings.setAttribute(QWebSettings.JavascriptCanAccessClipboard, True)
		webSettings.setAttribute(QWebSettings.LocalContentCanAccessFileUrls, True)
		webSettings.setAttribute(QWebSettings.LocalContentCanAccessRemoteUrls, True)
		self.mainFrame.javaScriptWindowObjectCleared.connect(self.setJavaScriptObject)
		self.mainFrame.iconChanged.connect(self.changeIcon)

 def drag_data(self):
     m = self.model()
     rows = self.selectionModel().selectedRows()
     paths = [force_unicode(p, enc=filesystem_encoding) for p in m.paths(rows) if p]
     md = QMimeData()
     md.setData("application/calibre+from_device", b"dummy")
     md.setUrls([QUrl.fromLocalFile(p) for p in paths])
     drag = QDrag(self)
     drag.setMimeData(md)
     cover = self.drag_icon(m.cover(self.currentIndex().row()), len(paths) > 1)
     drag.setHotSpot(QPoint(-15, -15))
     drag.setPixmap(cover)
     return drag

def drag_data(self):
    m = self.model()
    db = m.db
    selected = self.get_selected_ids()
    ids = ' '.join(map(str, selected))
    md = QMimeData()
    md.setData('application/calibre+from_library', ids.encode('utf-8'))
    fmt = prefs['output_format']

    def url_for_id(i):
        try:
            ans = db.format_path(i, fmt, index_is_id=True)
        except:
            ans = None
        if ans is None:
            fmts = db.formats(i, index_is_id=True)
            if fmts:
                fmts = fmts.split(',')
            else:
                fmts = []
            for f in fmts:
                try:
                    ans = db.format_path(i, f, index_is_id=True)
                except:
                    ans = None
        if ans is None:
            ans = db.abspath(i, index_is_id=True)
        return QUrl.fromLocalFile(ans)

    md.setUrls([url_for_id(i) for i in selected])
    drag = QDrag(self)
    col = self.selectionModel().currentIndex().column()
    try:
        md.column_name = self.column_map[col]
    except AttributeError:
        md.column_name = 'title'
    drag.setMimeData(md)
    cover = self.drag_icon(m.cover(self.currentIndex().row()),
            len(selected) > 1)
    drag.setHotSpot(QPoint(-15, -15))
    drag.setPixmap(cover)
    return drag

class WebView(QWebView):
	def __init__(self, parent, url = ''):
		super(WebView, self).__init__(parent)
		self.draging = False
		self.drag = QDrag(self)
		self.webPage = WebPage()
		self.setPage(self.webPage)
		self.mainFrame = self.page().mainFrame()
		self.setAttribute(Qt.WA_DeleteOnClose, True)
		self.titleChanged.connect(parent.setWindowTitle)
		self.load(url)
		webSettings = self.settings()
		webSettings.setDefaultTextEncoding("utf-8")
		# webSettings.setOfflineStorageDefaultQuota(sys.maxsize)
		# webSettings.setOfflineWebApplicationCacheQuota(sys.maxsize)
		webSettings.enablePersistentStorage(assets.fs.dataPath())
		webSettings.setAttribute(QWebSettings.PluginsEnabled, True)
		webSettings.setAttribute(QWebSettings.DnsPrefetchEnabled, True)
		webSettings.setAttribute(QWebSettings.XSSAuditingEnabled, True)
		webSettings.setAttribute(QWebSettings.CSSGridLayoutEnabled, True)
		webSettings.setAttribute(QWebSettings.ScrollAnimatorEnabled, True)
		webSettings.setAttribute(QWebSettings.DeveloperExtrasEnabled, True)
		webSettings.setAttribute(QWebSettings.JavascriptCanOpenWindows, True)
		webSettings.setAttribute(QWebSettings.JavascriptCanCloseWindows, True)
		webSettings.setAttribute(QWebSettings.JavascriptCanAccessClipboard, True)
		webSettings.setAttribute(QWebSettings.LocalContentCanAccessFileUrls, True)
		webSettings.setAttribute(QWebSettings.LocalContentCanAccessRemoteUrls, True)
		self.mainFrame.javaScriptWindowObjectCleared.connect(self.setJavaScriptObject)
		self.mainFrame.iconChanged.connect(self.changeIcon)

	def load(self, url = ''):
		p = re.compile('(^file:\/\/)|(^http:\/\/)|(^https:\/\/)|(^data:)')
		if url and p.match(url) == None:
			url = QUrl.fromLocalFile(os.path.abspath(url))
		else:
			url = QUrl(url)
		super(WebView, self).load(url)

	def eval(self, javaScript):
		return self.mainFrame.evaluateJavaScript(javaScript)

	def changeIcon(self):
		self.parentWidget().setWindowIcon(self.mainFrame.icon())
		# self.parentWidget().setWindowIcon(QWebSettings.iconForUrl(self.url()))

	def setJavaScriptObject(self):
		self.mainFrame.addToJavaScriptWindowObject('HAE', self.parentWidget().api)
		self.mainFrame.addToJavaScriptWindowObject('HAE_app', self.parentWidget())
		self.mainFrame.addToJavaScriptWindowObject('HAE_fs', assets.fs)
		self.mainFrame.addToJavaScriptWindowObject('HAE_sys', assets.sys)
		self.mainFrame.addToJavaScriptWindowObject('HAE_codec', assets.codec)
		self.eval('''
			(function(){
				initModule('fs');
				initModule('sys');
				initModule('app');
				initModule('codec');
				initClass('Window');
				initClass('Dialog');
				initClass('FileDialog');
				initClass('File');
				initClass('Menu');
				initClass('MenuItem');
				initClass('TrayIcon');
				initClass('Downloader');
				initClass('Process');
				initClass('SocketServer');
				initClass('SocketClient');
				function initClass(name){
					HAE[name] = function(){
						return initEventBinder(HAE['create' + name].apply(window, arguments));
					};
				}
				function initModule(name){
					var key = 'HAE_' + name;
					HAE[name] = initEventBinder(window[key]);
					delete window[key];
				}
				function initEventBinder(object){
					object.addEvent = function(event, handler){
						if(typeof event == 'string'){
							var eventName = event;
							event = ('on' + event).toLowerCase();
							if(event in this && this[event].connect){
								this[event].connect(handler);
							}else{
								console.warn('Warning: This object dose not have "' + eventName + '" event');
							}
						}else if(typeof event == 'object'){
							for(var key in event){
								this.addEvent(key, event[key]);
							}
						}
					};
					object.removeEvent = function(event, handler){
						event = 'on' + event;
						console.log(this[event]);
						if(event in this && this[event].connect){
							this[event].disconnect(handler);
						}
#.........这里部分代码省略.........