Adding the first code files

Author: Deusdies

01-firstTutorial-alarm.py

@@ -0,0 +1,48 @@
+import sys
+from PySide.QtCore import *
+from PySide.QtGui import *
+import time
+
+
+app = QApplication(sys.argv)
+
+
+try:
+    due = QTime.currentTime()
+    message = "Alert!"
+
+    if len(sys.argv) < 2:
+        raise ValueError
+
+    hours, minutes = sys.argv[1].split(":")
+    due = QTime(int(hours), int(minutes))
+
+    if not due.isValid():
+        raise ValueError
+
+    if len(sys.argv) > 2:
+        message = " ".join(sys.argv[2:])
+
+except ValueError:
+    message = "Usage: firstTutorial-alarm.py HH:MM [optional message]" #24 hour clock
+
+while QTime.currentTime() < due:
+    time.sleep(10)
+
+
+
+label = QLabel("<font color=red size=72><b>" + message + "</b></font>")
+label.setWindowFlags(Qt.SplashScreen)
+label.show()
+
+QTimer.singleShot(20000, app.quit) #20 seconds
+app.exec_()
+
+
+
+
+
+
+
+
+

02-secondTutorial-calculator.py

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+import sys
+from PySide.QtCore import *
+from PySide.QtGui import *
+from math import *
+
+
+class Form(QDialog):
+
+    def __init__(self, parent=None):
+        super(Form, self).__init__(parent)
+
+        self.browser = QTextBrowser()
+        self.lineedit = QLineEdit("Type an expression and press Enter")
+        self.lineedit.selectAll()
+
+        layout = QVBoxLayout()
+        layout.addWidget(self.browser)
+        layout.addWidget(self.lineedit)
+        self.setLayout(layout)
+
+        self.lineedit.setFocus()
+
+        self.connect(self.lineedit, SIGNAL("returnPressed()"), self.updateUi)
+        self.setWindowTitle("Calculate")
+
+
+    def updateUi(self):
+        try:
+            text = self.lineedit.text()
+            self.browser.append("%s = <b>%s</b>" % (text, eval(text)))
+        except:
+            self.browser.append("<font color=red>%s is invalid</font>" % text)
+
+
+
+app = QApplication(sys.argv)
+form = Form()
+form.show()
+app.exec_()
+
+
+
+
+
+
+
+

03-thirdTutorial-currency.py

@@ -0,0 +1,83 @@
+import sys
+from PySide.QtCore import *
+from PySide.QtGui import *
+
+import urllib2
+
+
+class Form(QDialog):
+
+    def __init__(self, parent=None):
+        super(Form, self).__init__(parent)
+
+        date = self.getdata()
+        rates = sorted(self.rates.keys())
+
+        dateLabel = QLabel(date)
+        self.fromComboBox = QComboBox()
+        self.fromComboBox.addItems(rates)
+        self.fromSpinBox = QDoubleSpinBox()
+        self.fromSpinBox.setRange(0.01, 10000000.00)
+        self.fromSpinBox.setValue(1.00)
+        self.toComboBox = QComboBox()
+        self.toComboBox.addItems(rates)
+        self.toLabel = QLabel("1.00")
+
+        grid = QGridLayout()
+        grid.addWidget(dateLabel, 0, 0)
+        grid.addWidget(self.fromComboBox, 1, 0)
+        grid.addWidget(self.fromSpinBox, 1, 1)
+        grid.addWidget(self.toComboBox, 2, 0)
+        grid.addWidget(self.toLabel, 2, 1)
+        self.setLayout(grid)
+
+
+        self.connect(self.fromComboBox, SIGNAL("currentIndexChanged(int)"), self.updateUi)
+        self.connect(self.toComboBox, SIGNAL("currentIndexChanged(int)"), self.updateUi)
+        self.connect(self.fromSpinBox, SIGNAL("valueChanged(double)"), self.updateUi)
+
+
+    def updateUi(self):
+        to = self.toComboBox.currentText()
+        from_ = self.fromComboBox.currentText()
+
+        amount = (self.rates[from_] / self.rates[to]) * self.fromSpinBox.value()
+        self.toLabel.setText("%0.2f" % amount)
+
+    def getdata(self):
+        self.rates = {}
+
+        try:
+            date = "Unknown"
+
+            fh = urllib2.urlopen("http://www.bankofcanada.ca/en/markets/csv/exchange_eng.csv")
+
+            for line in fh:
+                line = line.rstrip()
+                if not line or line.startswith(("#", "Closing")):
+                    continue
+
+                fields = line.split(",")
+                if line.startswith("Date "):
+                    date = fields[-1]
+
+                else:
+                    try:
+                        value = float(fields[-1])
+                        self.rates[fields[0]] = value
+                    except ValueError:
+                        pass
+
+            return "Exchange rates date: " + date
+        except Exception, e:
+            return "Failued to download:\n%s" % e
+
+
+app = QApplication(sys.argv)
+form = Form()
+form.show()
+app.exec_()
+
+
+
+

04-fourthTutorial-signals.py

@@ -0,0 +1,29 @@
+import sys
+from PySide.QtCore import *
+from PySide.QtGui import *
+
+class Form(QDialog):
+
+    def __init__(self, parent=None):
+        super(Form, self).__init__(parent)
+
+        dial = QDial()
+        dial.setNotchesVisible(True)
+
+        spinbox = QSpinBox()
+
+        layout = QHBoxLayout()
+        layout.addWidget(dial)
+        layout.addWidget(spinbox)
+        self.setLayout(layout)
+
+        self.connect(dial, SIGNAL("valueChanged(int)"), spinbox.setValue)
+        self.connect(spinbox, SIGNAL("valueChanged(int)"), dial.setValue)
+
+        self.setWindowTitle("Signals and Slots")
+
+
+app = QApplication(sys.argv)
+form = Form()
+form.show()
+app.exec_()

06-sixthTutorial-moresignals.py

@@ -0,0 +1,54 @@
+import sys
+from PySide.QtCore import *
+from PySide.QtGui import *
+
+class ZeroSpinBox(QSpinBox):
+
+    zeros = 0
+
+    def __init__(self, parent=None):
+        super(ZeroSpinBox, self).__init__(parent)
+
+        self.connect(self, SIGNAL("valueChanged(int)"), self.checkzero)
+
+    def checkzero(self):
+        if self.value() == 0:
+            self.zeros += 1
+            self.nulls = 5
+            self.emit(SIGNAL("atzero"), self.zeros, self.nulls)
+
+
+
+class Form(QDialog):
+
+    def __init__(self, parent=None):
+        super(Form, self).__init__(parent)
+
+        dial = QDial()
+        dial.setNotchesVisible(True)
+
+        zerospinbox = ZeroSpinBox()
+
+        layout = QHBoxLayout()
+        layout.addWidget(dial)
+        layout.addWidget(zerospinbox)
+        self.setLayout(layout)
+
+        self.connect(dial, SIGNAL("valueChanged(int)"), zerospinbox.setValue)
+        self.connect(zerospinbox, SIGNAL("valueChanged(int)"), dial.setValue)
+        self.connect(zerospinbox, SIGNAL("atzero"), self.announce)
+
+        self.setWindowTitle("Signals and Slots")
+
+    def announce(self, zeros, nulls):
+        print "ZeroSPinBox has been at zero " + str(zeros) + " times."
+        print "The constant nulls is ", str(nulls)
+
+
+
+app = QApplication(sys.argv)
+form = Form()
+form.show()
+app.exec_()
+
+

08-eightTutorial-QFileDialog-class.py

@@ -0,0 +1,60 @@
+from PySide.QtGui import *
+from PySide.QtCore import *
+import sys
+
+__appname__ = "Eight Video"
+
+class Program(QDialog):
+
+    def __init__(self, parent=None):
+        super(Program, self).__init__(parent)
+
+        openButton = QPushButton("Open")
+        saveButton = QPushButton("Save")
+        dirButton = QPushButton("Other")
+        closeButton = QPushButton("Close...")
+
+        self.connect(openButton, SIGNAL("clicked()"), self.open)
+        self.connect(saveButton, SIGNAL("clicked()"), self.save)
+
+        layout = QVBoxLayout()
+        layout.addWidget(openButton)
+        layout.addWidget(saveButton)
+        layout.addWidget(dirButton)
+        layout.addWidget(closeButton)
+        self.setLayout(layout)
+
+    def open(self):
+
+        dir = "."
+
+        fileObj = QFileDialog.getOpenFileName(self, __appname__ + " Open File Dialog", dir=dir, filter="Text files (*.txt)")
+        print fileObj
+        print type(fileObj)
+
+        fileName = fileObj[0]
+
+        file = open(fileName, "r")
+        read = file.read()
+        file.close()
+        print read
+
+    def save(self):
+        dir = "."
+
+        fileObj = QFileDialog.getSaveFileName(self, __appname__, dir=dir, filter="Text Files (*.txt)")
+
+        print fileObj
+        print type(fileObj)
+
+        contents = "Hello from http://py.bo.vc"
+
+        fileName = fileObj[0]
+
+        open(fileName, mode="w").write(contents)
+
+
+app = QApplication(sys.argv)
+form = Program()
+form.show()
+app.exec_()