MainWindow.py

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from __future__ import absolute_import
from builtins import range
import logging
import os
import math

from PyQt4.QtCore import Qt, SIGNAL, QEvent, QPoint, QSize
from PyQt4.QtGui import QMainWindow, QTabWidget, QSizePolicy, QIcon

from Vispa.Main.StartupScreen import StartupScreen
from . import Resources

class MainWindow(QMainWindow):
    
    WINDOW_WIDTH = 800
    WINDOW_HEIGHT = 600
    
    """ MainWindow """
    def __init__(self, application=None, title="VISPA"):
        #logging.debug(__name__ + ": __init__")
                
        self._justActivated = False
        self._startupScreen = None
        self._application = application
        QMainWindow.__init__(self)
        
        self._tabWidget = QTabWidget(self)
        self._tabWidget.setSizePolicy(QSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding))
        self._tabWidget.setUsesScrollButtons(True)
        self.setCentralWidget(self._tabWidget)
        if hasattr(self._tabWidget,"setTabsClosable"):
            self._tabWidget.setTabsClosable(True)
        
        if "vispa" in title.lower():
            self.createStartupScreen()

        self._fileMenu = self.menuBar().addMenu("&File")
        self._editMenu = self.menuBar().addMenu("&Edit")
        self._helpMenu = self.menuBar().addMenu("&Help")

        self._fileToolBar = self.addToolBar("File")
        
        self.ensurePolished()
        self.setWindowIcon(QIcon(":/resources/vispabutton.png"))
        self.setWindowTitle(title)
        self.statusBar()

        self._loadIni()
        if self._startupScreen:
            self._startupScreen.raise_()
            self.updateStartupScreenGeometry()
        
    def startupScreen(self):
        return self._startupScreen
        
    def application(self):
        return self._application
    
    def fileMenu(self):
        return self._fileMenu

    def editMenu(self):
        return self._editMenu
    
    def helpMenu(self):
        return self._helpMenu
    
    def fileToolBar(self):
        return self._fileToolBar
    
    def closeEvent(self, event):
        """ Closes all tabs and exits program if succeeded.
        """
        logging.debug('MainWindow: closeEvent()')
        self._application.closeAllFiles()
        self._application.shutdownPlugins()
        if len(self.application().tabControllers()) == 0:
            event.accept()
            self._saveIni()
        else:
            event.ignore()

    def addWindow(self, widget, width=None, height=None):
        """ Add a new window and call the TabController to update the label of the window.
        """
        logging.debug('MainWindow: addWindow()')
        widget.setMainWindow(self)
        widget.setWindowFlags(Qt.Dialog)
        widget.show()
        if width and height:
            widget.resize(width,height)
        else:
            widget.resize(self._tabWidget.size())
        widget.controller().updateLabel()

    def addTab(self, widget):
        """ Add a new tab to the TabWidget and call the TabController to update the label of the Tab.
        """
        #logging.debug('MainWindow: addTab()')
        widget.setTabWidget(self._tabWidget)
        widget.setMainWindow(self)
        self._tabWidget.addTab(widget, '')
        self._tabWidget.setCurrentWidget(widget)
        widget.controller().updateLabel()

    def tabWidget(self):
        return self._tabWidget
    
    def tabWidgets(self):
        return [self._tabWidget.widget(i) for i in range(0, self._tabWidget.count())]
    
    def isTabWidget(self, widget):
        return (self._tabWidget.indexOf(widget) >= 0)

    def _loadIni(self):
        """ Load the window properties.
        """
        ini = self._application.ini()
        
        if ini.has_option("window", "width"):
            width = ini.getint("window", "width")
        else:
            width = self.WINDOW_WIDTH
        if ini.has_option("window", "height"):
            height = ini.getint("window", "height")
        else:
            height = self.WINDOW_HEIGHT
        self.resize(QSize(width, height))
        if ini.has_option("window", "maximized"):
            if ini.getboolean("window", "maximized"):
                self.setWindowState(Qt.WindowMaximized)
        if ini.has_option("window", "fullScreen"):
            if ini.getboolean("window", "fullScreen"):
                self.setWindowState(Qt.WindowFullScreen)

    def _saveIni(self):
        """ Save the window properties.
        """
        ini = self._application.ini()
        if not ini.has_section("window"):
            ini.add_section("window")
        if not self.isMaximized() and not self.isFullScreen():
            ini.set("window", "width", str(self.width()))
            ini.set("window", "height", str(self.height()))
        ini.set("window", "maximized", str(self.isMaximized()))
        ini.set("window", "fullScreen", str(self.isFullScreen()))
        self._application.writeIni()
        
    def event(self, event):
        """ Emits activated() signal if correct event occures and if correct changeEvent occured before.
        
        Also see changeEvent().
        The Application shall connect to windowActivated().
        """
        QMainWindow.event(self, event)
        if self._justActivated and event.type() == QEvent.LayoutRequest:
            self._justActivated = False
            self.emit(SIGNAL("windowActivated()"))
        elif event.type()==QEvent.WindowActivate:
            self.emit(SIGNAL("windowActivated()"))
        return False
        
    def changeEvent(self, event):
        """ Together with event() this function makes sure tabChanged() is called when the window is activated.
        """
        if event.type() == QEvent.ActivationChange and self.isActiveWindow():
            self._justActivated = True

    def keyPressEvent(self, event):
        """ On Escape cancel all running operations.
        """
        #logging.debug(__name__ + ": keyPressEvent")
        if event.key() == Qt.Key_Escape:
            self.application().cancel()
        QMainWindow.keyPressEvent(self, event)

    def resizeEvent(self, event):
        QMainWindow.resizeEvent(self, event)
        self.updateStartupScreenGeometry()
                
    def setStartupScreenVisible(self, show):
        if self._startupScreen:
            self._startupScreen.setVisible(show)
            #logging.debug(self.__class__.__name__ +": setStartupScreenVisible() %d" % self._startupScreen.isVisible())
            if show:
                self.updateStartupScreenGeometry()
            
    def updateStartupScreenGeometry(self):
        if not self._startupScreen:
            return
        boundingRect = self._startupScreen.boundingRect()
        deltaWidth = self.width() - boundingRect.width() - 20
        deltaHeight = self.height() - boundingRect.height() - 80
                
        if deltaWidth != 0 or deltaHeight != 0:
            self._startupScreen.setMaximumSize(max(1, self._startupScreen.width() + deltaWidth), max(1, self._startupScreen.height() + deltaHeight))
            boundingRect = self._startupScreen.boundingRect()
        self._startupScreen.move(QPoint(0.5 * (self.width() - boundingRect.width()), 0.5 * (self.height() - boundingRect.height()) + 10) + self._startupScreen.pos() - boundingRect.topLeft()) 

    def createStartupScreen(self):
        self._startupScreen = StartupScreen(self)
        
    def newAnalysisDesignerSlot(self, checked=False):
        """ Creates new analysis designer tab if that plugin was loaded.
        """
        plugin = self.application().plugin("AnalysisDesigner")
        if plugin:
            plugin.newAnalysisDesignerTab()
        
    def newPxlSlot(self, checked=False):
        """ Creates new pxl tab if that plugin was loaded.
        """
        plugin = self.application().plugin("Pxl")
        if plugin:
            plugin.newFile()
            
    def openAnalysisFileSlot(self, checked=False):
        plugin = self.application().plugin("AnalysisDesigner")
        if plugin:
            currentRow=self._startupScreen._analysisDesignerRecentFilesList.currentRow()
            if currentRow!=0:
                files=self.application().recentFilesFromPlugin(plugin)
                if currentRow<=len(files):
                    self.application().openFile(files[currentRow-1])
            else:
                filetypes = plugin.filetypes()
                if len(filetypes) > 0:
                    self.application().openFileDialog(filetypes[0].fileDialogFilter())
        
    def openPxlFileSlot(self, checked=False):
        plugin = self.application().plugin("Pxl")
        if plugin:
            currentRow=self._startupScreen._pxlEditorRecentFilesList.currentRow()
            if currentRow!=0:
                files=self.application().recentFilesFromPlugin(plugin)
                if currentRow<=len(files):
                    self.application().openFile(files[currentRow-1])
            else:
                filetypes = plugin.filetypes()
                if len(filetypes) > 0:
                    self.application().openFileDialog(filetypes[0].fileDialogFilter())