DockArea.py 8.77 KB
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# -*- coding: utf-8 -*-
from pyqtgraph.Qt import QtCore, QtGui
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from .Container import *
from .DockDrop import *
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from .Dock import Dock
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import pyqtgraph.debug as debug
import weakref

## TODO:
# - containers should be drop areas, not docks. (but every slot within a container must have its own drop areas?)
# - drop between tabs
# - nest splitters inside tab boxes, etc.




class DockArea(Container, QtGui.QWidget, DockDrop):
    def __init__(self, temporary=False, home=None):
        Container.__init__(self, self)
        QtGui.QWidget.__init__(self)
        DockDrop.__init__(self, allowedAreas=['left', 'right', 'top', 'bottom'])
        self.layout = QtGui.QVBoxLayout()
        self.layout.setContentsMargins(0,0,0,0)
        self.layout.setSpacing(0)
        self.setLayout(self.layout)
        self.docks = weakref.WeakValueDictionary()
        self.topContainer = None
        self.raiseOverlay()
        self.temporary = temporary
        self.tempAreas = []
        self.home = home
        
    def type(self):
        return "top"
        
    def addDock(self, dock, position='bottom', relativeTo=None):
        """Adds a dock to this area.
        position may be: bottom, top, left, right, over, under
        If relativeTo specifies an existing dock, the new dock is added adjacent to it"""
        
        ## 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, basestring):
                relativeTo = self.docks[relativeTo]
            container = self.getContainer(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
        container.insert(dock, insertPos, neighbor)
        dock.area = self
        self.docks[dock.name()] = dock
        
    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)
        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.raiseOverlay()
        return new
    
    def insert(self, new, pos=None, neighbor=None):
        if self.topContainer is not None:
            self.topContainer.containerChanged(None)
        self.layout.addWidget(new)
        self.topContainer = new
        #print self, "set top:", new
        new._container = self
        self.raiseOverlay()
        #print "Insert top:", new
        
    def count(self):
        if self.topContainer is None:
            return 0
        return 1
        
    def moveDock(self, dock, position, neighbor):
        old = dock.container()
        ## 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)
        old.apoptose()
        
    #def paintEvent(self, ev):
        #self.drawDockOverlay()
        
    def resizeEvent(self, ev):
        self.resizeOverlay(self.size())
        
    def addTempArea(self):
        if self.home is None:
            area = DockArea(temporary=True, home=self)
            self.tempAreas.append(area)
            win = QtGui.QMainWindow()
            win.setCentralWidget(area)
            area.win = win
            win.show()
        else:
            area = self.home.addTempArea()
        #print "added temp area", area, area.window()
        return area
        
    def floatDock(self, dock):
        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):
        state = {'main': self.childState(self.topContainer), '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):
        ## 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
        self.buildFromState(state['main'], docks, self)
        
        ## 3) create floating areas, populate
        for s in state['float']:
            a = self.addTempArea()
            a.buildFromState(s[0]['main'], docks, a)
            a.win.setGeometry(*s[1])
        
        ## 4) Add any remaining docks to the bottom
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        for d in docks.values():
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            self.moveDock(d, 'below', 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):
        typ, contents, state = state
        pfx = "  " * depth
        if typ == 'dock':
            obj = docks[contents]
            del docks[contents]
        else:
            obj = self.makeContainer(typ)
            
        root.insert(obj, 'after')
        #print pfx+"Add:", obj, " -> ", root
        
        if typ != 'dock':
            for o in contents:
                self.buildFromState(o, docks, obj, depth+1)
            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
        else:
            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):
        #print "apoptose area:", self.temporary, self.topContainer, self.topContainer.count()
        if self.temporary and self.topContainer.count() == 0:
            self.topContainer = None
            self.home.removeTempArea(self)
            #self.close()