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# Copyright 2007 Nanorex, Inc. See LICENSE file for details.
"""
PM_Clipboard.py
The PM_Clipboard class provides a groupbox containing a list of clipboard
items that can be pasted in the 3D Workspace. The selected item in this
list is shown by its elementViewer (an instance of L{PM_PreviewGroupBox})
The object being previewed can then be deposited into the 3D workspace.
@author: Ninad
@version: $Id$
@copyright: 2007 Nanorex, Inc. See LICENSE file for details.
History:
ninad 2007-08-29: Created. (Initially to support the clipboard in L{PasteFromClipboard_Command})
"""
from PyQt4.Qt import QListWidget
from PyQt4.Qt import SIGNAL
from graphics.widgets.ThumbView import MMKitView
from PM.PM_GroupBox import PM_GroupBox
from utilities.constants import diTUBES
class PM_Clipboard(PM_GroupBox):
"""
The PM_Clipboard class provides a groupbox containing a list of clipboard
items that can be pasted in the 3D Workspace. The selected item in this
list is shown by its elementViewer (an instance of L{PM_PreviewGroupBox})
The object being previewed can then be deposited into the 3D workspace.
"""
def __init__(self,
parentWidget,
title = 'Clipboard',
win = None,
elementViewer = None
):
"""
Appends a PM_Clipboard groupbox widget to I{parentWidget},a L{PM_Dialog}
@param parentWidget: The parent dialog (Property manager) containing
this widget.
@type parentWidget: L{PM_Dialog}
@param title: The title (button) text.
@type title: str
@param win: MainWindow object
@type win: L{MWsemantics} or None
@param elementViewer: The associated preview pane groupbox. If provided,
The selected item in L{self.clipboardListWidget}
is shown (previewed) by L{elementViewer}.
The object being previewed can then be deposited
into the 3D workspace.
@type elementViewer: L{PM_PreviewGroupBox} or None
"""
self.w = win
self.elementViewer = elementViewer
self.elementViewer.setDisplay(diTUBES)
self.pastableItems = None
PM_GroupBox.__init__(self, parentWidget, title)
self._loadClipboardGroupbox()
def _loadClipboardGroupbox(self):
"""
Load the L{self.clipboardListWidget} widget used to display a list of
clipboard items inside this clipboard groupbox.
"""
self.clipboardListWidget = QListWidget(self)
self.gridLayout.addWidget(self.clipboardListWidget)
#Append to the widget list. This is important for expand -collapse
#functions (of the groupbox) to work properly.
self._widgetList.append(self.clipboardListWidget)
def _updateElementViewer(self, newModel = None):
"""
Update the view of L{self.elementViewer}
@param newModel: The model correseponding to the item selected
in L{self.clipboardListWidget}.
@type newModel: L{molecule} or L{Group}
"""
if not self.elementViewer:
return
assert isinstance(self.elementViewer, MMKitView)
self.elementViewer.resetView()
if newModel:
self.elementViewer.updateModel(newModel)
def update(self):
"""
Updates the clipboard items in the L{PM_Clipboard} groupbox. Also
updates its element viewer.
"""
PM_GroupBox.update(self)
self.pastableItems = self.w.assy.shelf.getPastables()
i = self.clipboardListWidget.currentRow()
self.clipboardListWidget.clear()
newModel = None
if len(self.pastableItems):
for item in self.pastableItems:
self.clipboardListWidget.addItem(item.name)
if i >= self.clipboardListWidget.count():
i = self.clipboardListWidget.count() - 1
if i < 0:
i = 0
self.clipboardListWidget.setCurrentItem(
self.clipboardListWidget.item(i))
newModel = self.pastableItems[i]
self._updateElementViewer(newModel)
def clipboardListItemChanged(self, currentItem = None, previousItem = None):
"""
Slot method. Called when user clicks on a different pastable item
displayed in this groupbox
@param currentItem: Current item in the L{self.clipboardListWidget}
that is selected
@type currentItem: U{B{QListWidgetItem}
<http://doc.trolltech.com/4.2/qlistwidgetitem.html>}
@param previousItem: Previously selected item in the
L{self.clipboardListWidget}
@type previousItem: U{B{QListWidgetItem}
<http://doc.trolltech.com/4.2/qlistwidgetitem.html>}
"""
if not (currentItem or previousItem):
return
itemId = self.clipboardListWidget.row(currentItem)
if itemId != -1:
newChunk = self.pastableItems[itemId]
self.clipboardListWidget.setCurrentRow(itemId)
self._updateElementViewer(newChunk)
def connect_or_disconnect_signals(self, isConnect):
"""
Connect or disconnect widget signals sent to their slot methods.
@param isConnect: If True the widget will send the signals to the slot
method.
@type isConnect: boolean
"""
if isConnect:
change_connect = self.w.connect
else:
change_connect = self.w.disconnect
change_connect(
self.clipboardListWidget,
SIGNAL("currentItemChanged(QListWidgetItem*,QListWidgetItem*)"),
self.clipboardListItemChanged )
def currentRow(self):
"""
Return the current row of the selected item in this groupbox's
listwidget ( L{self.clipboardListWidget} )
@return: Current Row of the selected pastable item in the
clipboard groupbox.
@rtype: int
"""
currentRow = self.clipboardListWidget.currentRow()
return currentRow
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