101 lines
3.4 KiB
Python
101 lines
3.4 KiB
Python
# -*- coding: utf-8 -*-
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from ..Qt import QtGui
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__all__ = ['LayoutWidget']
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class LayoutWidget(QtGui.QWidget):
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"""
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Convenience class used for laying out QWidgets in a grid.
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(It's just a little less effort to use than QGridLayout)
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"""
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def __init__(self, parent=None):
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QtGui.QWidget.__init__(self, parent)
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self.layout = QtGui.QGridLayout()
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self.setLayout(self.layout)
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self.items = {}
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self.rows = {}
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self.currentRow = 0
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self.currentCol = 0
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def nextRow(self):
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"""Advance to next row for automatic widget placement"""
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self.currentRow += 1
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self.currentCol = 0
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def nextColumn(self, colspan=1):
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"""Advance to next column, while returning the current column number
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(generally only for internal use--called by addWidget)"""
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self.currentCol += colspan
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return self.currentCol-colspan
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def nextCol(self, *args, **kargs):
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"""Alias of nextColumn"""
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return self.nextColumn(*args, **kargs)
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def addLabel(self, text=' ', row=None, col=None, rowspan=1, colspan=1, **kargs):
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"""
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Create a QLabel with *text* and place it in the next available cell (or in the cell specified)
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All extra keyword arguments are passed to QLabel().
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Returns the created widget.
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"""
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text = QtGui.QLabel(text, **kargs)
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self.addWidget(text, row, col, rowspan, colspan)
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return text
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def addLayout(self, row=None, col=None, rowspan=1, colspan=1, **kargs):
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"""
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Create an empty LayoutWidget and place it in the next available cell (or in the cell specified)
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All extra keyword arguments are passed to :func:`LayoutWidget.__init__ <pyqtgraph.LayoutWidget.__init__>`
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Returns the created widget.
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"""
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layout = LayoutWidget(**kargs)
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self.addWidget(layout, row, col, rowspan, colspan)
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return layout
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def addWidget(self, item, row=None, col=None, rowspan=1, colspan=1):
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"""
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Add a widget to the layout and place it in the next available cell (or in the cell specified).
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"""
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if row == 'next':
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self.nextRow()
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row = self.currentRow
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elif row is None:
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row = self.currentRow
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if col is None:
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col = self.nextCol(colspan)
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if row not in self.rows:
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self.rows[row] = {}
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self.rows[row][col] = item
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self.items[item] = (row, col)
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self.layout.addWidget(item, row, col, rowspan, colspan)
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def getWidget(self, row, col):
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"""Return the widget in (*row*, *col*)"""
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return self.rows[row][col]
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#def itemIndex(self, item):
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#for i in range(self.layout.count()):
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#if self.layout.itemAt(i).graphicsItem() is item:
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#return i
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#raise Exception("Could not determine index of item " + str(item))
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#def removeItem(self, item):
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#"""Remove *item* from the layout."""
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#ind = self.itemIndex(item)
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#self.layout.removeAt(ind)
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#self.scene().removeItem(item)
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#r,c = self.items[item]
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#del self.items[item]
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#del self.rows[r][c]
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#self.update()
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#def clear(self):
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#items = []
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#for i in list(self.items.keys()):
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#self.removeItem(i)
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