Newer
Older
.. _ViewExercise1Solution:
========================
View Exercise 1 Solution
========================
main.py
#######
.. code-block:: python
from __future__ import (absolute_import,division,print_function)
import PyQt4.QtGui as QtGui
import PyQt4.QtCore as QtCore
import sys
import view
"""
A wrapper class for setting the main window
"""
class demo(QtGui.QMainWindow):
def __init__(self,parent=None):
super(demo,self).__init__(parent)
self.window = QtGui.QMainWindow()
my_view = view.view()
# set the view for the main window
self.setCentralWidget(my_view)
self.setWindowTitle("view tutorial")
if QtGui.QApplication.instance():
_app = QtGui.QApplication.instance()
else:
_app = QtGui.QApplication(sys.argv)
return _app
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
app = qapp()
window = demo()
window.show()
app.exec_()
view.py
#######
.. code-block:: python
from __future__ import (absolute_import,division,print_function)
import PyQt4.QtGui as QtGui
import PyQt4.QtCore as QtCore
class view(QtGui.QWidget):
def __init__(self, parent=None):
super(view, self).__init__(parent)
grid = QtGui.QVBoxLayout(self)
self.table = QtGui.QTableWidget(self)
self.table.setRowCount(4)
self.table.setColumnCount(2)
grid.addWidget(self.table)
self.colours = QtGui.QComboBox()
options = ["Blue", "Green", "Red"]
self.colours.addItems(options)
self.grid_lines = QtGui.QTableWidgetItem()
self.grid_lines.setFlags(QtCore.Qt.ItemIsUserCheckable | QtCore.Qt.ItemIsEnabled)
self.grid_lines.setCheckState(QtCore.Qt.Unchecked)
self.addItemToTable("Show grid lines", self.grid_lines, 1)
self.freq = QtGui.QTableWidgetItem("1.0")
self.phi = QtGui.QTableWidgetItem("0.0")
self.addWidgetToTable("Colour", self.colours, 0)
self.addItemToTable("Frequency", self.freq, 2)
self.addItemToTable("Phase", self.phi, 3)
self.plot = QtGui.QPushButton('Add', self)
self.plot.setStyleSheet("background-color:lightgrey")
grid.addWidget(self.plot)
self.setLayout(grid)
def setTableRow(self, name, row):
text = QtGui.QTableWidgetItem(name)
text.setFlags(QtCore.Qt.ItemIsEnabled)
col = 0
self.table.setItem(row, col, text)
def addWidgetToTable(self, name, widget, row):
self.setTableRow(name,row)
col = 1
self.table.setCellWidget(row, col, widget)
def addItemToTable(self, name, widget, row):
self.setTableRow(name, row)
col = 1
self.table.setItem(row, col, widget)
In the above code the following functions have been added to prevent
repetition of code:
- ``setTableRow`` sets the label for the table row
- ``addWidgetToTable`` adds a widget to the table
- ``addItemToTable`` adds an item to the table (needed because the
frequency and phase are items and not widgets)