import weakref from ..Qt import QtWidgets from .Container import Container, HContainer, TContainer, VContainer from .Dock import Dock from .DockDrop import DockDrop class DockArea(Container, QtWidgets.QWidget): def __init__(self, parent=None, temporary=False, home=None): Container.__init__(self, self) QtWidgets.QWidget.__init__(self, parent=parent) self.dockdrop = DockDrop(self) self.dockdrop.removeAllowedArea('center') self.layout = QtWidgets.QVBoxLayout() self.layout.setContentsMargins(0,0,0,0) self.layout.setSpacing(0) self.setLayout(self.layout) self.docks = weakref.WeakValueDictionary() self.topContainer = None self.dockdrop.raiseOverlay() self.temporary = temporary self.tempAreas = [] self.home = home def type(self): return "top" def addDock(self, dock=None, position='bottom', relativeTo=None, **kwds): """Adds a dock to this area. ============== ================================================================= **Arguments:** dock The new Dock object to add. If None, then a new Dock will be created. position 'bottom', 'top', 'left', 'right', 'above', or 'below' relativeTo If relativeTo is None, then the new Dock is added to fill an entire edge of the window. If relativeTo is another Dock, then the new Dock is placed adjacent to it (or in a tabbed configuration for 'above' and 'below'). ============== ================================================================= All extra keyword arguments are passed to Dock.__init__() if *dock* is None. """ if dock is None: dock = Dock(**kwds) # store original area that the dock will return to when un-floated if not self.temporary: dock.orig_area = self ## Determine the container to insert this dock into. ## If there is no neighbor, then the container is the top. if relativeTo is None or relativeTo is self: if self.topContainer is None: container = self neighbor = None else: container = self.topContainer neighbor = None else: if isinstance(relativeTo, str): relativeTo = self.docks[relativeTo] container = self.getContainer(relativeTo) if container is None: raise TypeError("Dock %s is not contained in a DockArea; cannot add another dock relative to it." % relativeTo) neighbor = relativeTo ## what container type do we need? neededContainer = { 'bottom': 'vertical', 'top': 'vertical', 'left': 'horizontal', 'right': 'horizontal', 'above': 'tab', 'below': 'tab' }[position] ## Can't insert new containers into a tab container; insert outside instead. if neededContainer != container.type() and container.type() == 'tab': neighbor = container container = container.container() ## Decide if the container we have is suitable. ## If not, insert a new container inside. if neededContainer != container.type(): if neighbor is None: container = self.addContainer(neededContainer, self.topContainer) else: container = self.addContainer(neededContainer, neighbor) ## Insert the new dock before/after its neighbor insertPos = { 'bottom': 'after', 'top': 'before', 'left': 'before', 'right': 'after', 'above': 'before', 'below': 'after' }[position] #print "request insert", dock, insertPos, neighbor old = dock.container() container.insert(dock, insertPos, neighbor) self.docks[dock.name()] = dock if old is not None: old.apoptose() return dock def moveDock(self, dock, position, neighbor): """ Move an existing Dock to a new location. """ ## Moving to the edge of a tabbed dock causes a drop outside the tab box if position in ['left', 'right', 'top', 'bottom'] and neighbor is not None and neighbor.container() is not None and neighbor.container().type() == 'tab': neighbor = neighbor.container() self.addDock(dock, position, neighbor) def getContainer(self, obj): if obj is None: return self return obj.container() def makeContainer(self, typ): if typ == 'vertical': new = VContainer(self) elif typ == 'horizontal': new = HContainer(self) elif typ == 'tab': new = TContainer(self) else: raise ValueError("typ must be one of 'vertical', 'horizontal', or 'tab'") return new def addContainer(self, typ, obj): """Add a new container around obj""" new = self.makeContainer(typ) container = self.getContainer(obj) container.insert(new, 'before', obj) #print "Add container:", new, " -> ", container if obj is not None: new.insert(obj) self.dockdrop.raiseOverlay() return new def insert(self, new, pos=None, neighbor=None): if self.topContainer is not None: # Adding new top-level container; addContainer() should # take care of giving the old top container a new home. self.topContainer.containerChanged(None) self.layout.addWidget(new) new.containerChanged(self) self.topContainer = new self.dockdrop.raiseOverlay() def count(self): if self.topContainer is None: return 0 return 1 def resizeEvent(self, ev): self.dockdrop.resizeOverlay(self.size()) def addTempArea(self): if self.home is None: area = DockArea(temporary=True, home=self) self.tempAreas.append(area) win = TempAreaWindow(area) area.win = win win.show() else: area = self.home.addTempArea() #print "added temp area", area, area.window() return area def floatDock(self, dock): """Removes *dock* from this DockArea and places it in a new window.""" area = self.addTempArea() area.win.resize(dock.size()) area.moveDock(dock, 'top', None) def removeTempArea(self, area): self.tempAreas.remove(area) #print "close window", area.window() area.window().close() def saveState(self): """ Return a serialized (storable) representation of the state of all Docks in this DockArea.""" if self.topContainer is None: main = None else: main = self.childState(self.topContainer) state = {'main': main, 'float': []} for a in self.tempAreas: geo = a.win.geometry() geo = (geo.x(), geo.y(), geo.width(), geo.height()) state['float'].append((a.saveState(), geo)) return state def childState(self, obj): if isinstance(obj, Dock): return ('dock', obj.name(), {}) else: childs = [] for i in range(obj.count()): childs.append(self.childState(obj.widget(i))) return (obj.type(), childs, obj.saveState()) def restoreState(self, state, missing='error', extra='bottom'): """ Restore Dock configuration as generated by saveState. This function does not create any Docks--it will only restore the arrangement of an existing set of Docks. By default, docks that are described in *state* but do not exist in the dock area will cause an exception to be raised. This behavior can be changed by setting *missing* to 'ignore' or 'create'. Extra docks that are in the dockarea but that are not mentioned in *state* will be added to the bottom of the dockarea, unless otherwise specified by the *extra* argument. """ ## 1) make dict of all docks and list of existing containers containers, docks = self.findAll() oldTemps = self.tempAreas[:] #print "found docks:", docks ## 2) create container structure, move docks into new containers if state['main'] is not None: self.buildFromState(state['main'], docks, self, missing=missing) ## 3) create floating areas, populate for s in state['float']: a = self.addTempArea() a.buildFromState(s[0]['main'], docks, a, missing=missing) a.win.setGeometry(*s[1]) a.apoptose() # ask temp area to close itself if it is empty ## 4) Add any remaining docks to a float for d in docks.values(): if extra == 'float': a = self.addTempArea() a.addDock(d, 'below') else: self.moveDock(d, extra, None) #print "\nKill old containers:" ## 5) kill old containers for c in containers: c.close() for a in oldTemps: a.apoptose() def buildFromState(self, state, docks, root, depth=0, missing='error'): typ, contents, state = state if typ == 'dock': try: obj = docks[contents] del docks[contents] except KeyError: if missing == 'error': raise Exception('Cannot restore dock state; no dock with name "%s"' % contents) elif missing == 'create': obj = Dock(name=contents) elif missing == 'ignore': return else: raise ValueError('"missing" argument must be one of "error", "create", or "ignore".') else: obj = self.makeContainer(typ) root.insert(obj, 'after') if typ != 'dock': for o in contents: self.buildFromState(o, docks, obj, depth+1, missing=missing) # remove this container if possible. (there are valid situations when a restore will # generate empty containers, such as when using missing='ignore') obj.apoptose(propagate=False) obj.restoreState(state) ## this has to be done later? def findAll(self, obj=None, c=None, d=None): if obj is None: obj = self.topContainer ## check all temp areas first if c is None: c = [] d = {} for a in self.tempAreas: c1, d1 = a.findAll() c.extend(c1) d.update(d1) if isinstance(obj, Dock): d[obj.name()] = obj elif obj is not None: c.append(obj) for i in range(obj.count()): o2 = obj.widget(i) c2, d2 = self.findAll(o2) c.extend(c2) d.update(d2) return (c, d) def apoptose(self, propagate=True): # remove top container if possible, close this area if it is temporary. #print "apoptose area:", self.temporary, self.topContainer, self.topContainer.count() if self.topContainer is None or self.topContainer.count() == 0: self.topContainer = None if self.temporary and self.home is not None: self.home.removeTempArea(self) #self.close() def clear(self): docks = self.findAll()[1] for dock in docks.values(): dock.close() def dragEnterEvent(self, *args): self.dockdrop.dragEnterEvent(*args) def dragMoveEvent(self, *args): self.dockdrop.dragMoveEvent(*args) def dragLeaveEvent(self, *args): self.dockdrop.dragLeaveEvent(*args) def dropEvent(self, *args): self.dockdrop.dropEvent(*args) def printState(self, state=None, name='Main'): # for debugging if state is None: state = self.saveState() print("=== %s dock area ===" % name) if state['main'] is None: print(" (empty)") else: self._printAreaState(state['main']) for i, float in enumerate(state['float']): self.printState(float[0], name='float %d' % i) def _printAreaState(self, area, indent=0): if area[0] == 'dock': print(" " * indent + area[0] + " " + str(area[1:])) return else: print(" " * indent + area[0]) for ch in area[1]: self._printAreaState(ch, indent+1) class TempAreaWindow(QtWidgets.QWidget): def __init__(self, area, **kwargs): QtWidgets.QWidget.__init__(self, **kwargs) self.layout = QtWidgets.QGridLayout() self.setLayout(self.layout) self.layout.setContentsMargins(0, 0, 0, 0) self.dockarea = area self.layout.addWidget(area) def closeEvent(self, *args): # restore docks to their original area docks = self.dockarea.findAll()[1] for dock in docks.values(): if hasattr(dock, 'orig_area'): dock.orig_area.addDock(dock, ) # clear dock area, and close remaining docks self.dockarea.clear() super().closeEvent(*args)