Jan Grewe
ebca5c4b0b
items are only loaded upon activation (return) or clicking them, not because the list changes
202 lines
7.9 KiB
Python
202 lines
7.9 KiB
Python
import os
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from PyQt5 import QtWidgets
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from PyQt5.QtWidgets import QFrame, QGroupBox, QLabel, QListWidget, QListWidgetItem, QSplitter, QStackedLayout, QAbstractItemView, QVBoxLayout, QWidget, QGridLayout, QSpacerItem, QSizePolicy, QTreeView, QHeaderView
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from PyQt5.QtGui import QPixmap
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from PyQt5.QtCore import QItemSelectionModel, Qt, QSettings, QSize, pyqtSignal
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from file_handler import FileHandler
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from plot_screen import PlotScreen
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import communicator as comm
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import constants as cnst
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from tree_model import TreeModel, TreeType
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class CentralWidget(QWidget):
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def __init__(self, parent=None) -> None:
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super().__init__(parent=parent)
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self._splash = SplashScreen()
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self._file_view = FileView(self)
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self._plot_screen = PlotScreen(self)
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self._plot_screen.close_signal.connect(self.on_plot_close)
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self._stack = QStackedLayout(self)
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self._stack.addWidget(self._splash)
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self._stack.addWidget(self._file_view)
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self._stack.addWidget(self._plot_screen)
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self.setLayout(self._stack)
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#self.setStyleSheet("background-color: white;")
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def show_file_content(self):
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self._stack.setCurrentIndex(1)
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self._file_view.update()
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def plot_item(self, item):
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self._stack.setCurrentIndex(2)
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self._plot_screen.plot(item)
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def on_plot_close(self):
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self._stack.setCurrentIndex(1)
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def reset(self):
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self._file_view.reset()
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self._splash.reset()
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self._stack.setCurrentIndex(0)
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class FileView(QWidget):
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icon_size = QSize(30, 30)
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def __init__(self, parent=None) -> None:
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super().__init__(parent=parent)
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self._file_handler = FileHandler()
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vbox = QVBoxLayout()
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self.setLayout(vbox)
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splitter = QSplitter(Qt.Vertical)
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self._mdata_tree = QTreeView(self)
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self._mdata_tree.expanded.connect(self.metadataTreeResize)
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self._mdata_tree.collapsed.connect(self.metadataTreeResize)
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self._mdata_tree.setAlternatingRowColors(True)
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self._mdata_tree.setUniformRowHeights(True) # Allows for scrolling optimizations.
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self._mdata_tree.setWindowTitle("Metadata Tree")
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self._mdata_tree.setIconSize(self.icon_size)
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mheader = self._mdata_tree.header()
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mheader.setStretchLastSection(False)
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mheader.setSectionResizeMode(1, QHeaderView.ResizeToContents)
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mheader.setSectionResizeMode(2, QHeaderView.ResizeToContents)
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mheader.setSectionResizeMode(0, QHeaderView.Stretch)
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mdata_group = QGroupBox("Metadata")
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mdata_group.setLayout(QVBoxLayout())
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mdata_group.layout().addWidget(self._mdata_tree)
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self._data_tree = QTreeView(self)
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self._data_tree.expanded.connect(self.dataTreeResize)
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self._data_tree.collapsed.connect(self.dataTreeResize)
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self._data_tree.setAlternatingRowColors(True)
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self._data_tree.setUniformRowHeights(True) # Allows for scrolling optimizations.
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self._data_tree.setWindowTitle("Data Tree")
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self._data_tree.setIconSize(self.icon_size)
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self._data_tree.setSelectionBehavior(QAbstractItemView.SelectItems)
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self._data_tree.setSelectionMode(QAbstractItemView.SingleSelection)
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header = self._data_tree.header()
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header.setStretchLastSection(False)
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header.setSectionResizeMode(1, QHeaderView.ResizeToContents)
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header.setSectionResizeMode(2, QHeaderView.ResizeToContents)
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header.setSectionResizeMode(0, QHeaderView.Stretch)
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data_group = QGroupBox("Data")
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data_vbox = QVBoxLayout()
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data_vbox.addWidget(self._data_tree)
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data_group.setLayout(data_vbox)
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splitter.insertWidget(0, mdata_group)
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splitter.insertWidget(1, data_group)
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vbox.addWidget(splitter)
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def metadataTreeResize(self, index):
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self._mdata_tree.resizeColumnToContents(index.column())
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def dataTreeResize(self, index):
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self._data_tree.resizeColumnToContents(index.column())
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def dataTreeSelection(self, current_index, last_index):
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if not current_index.isValid():
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return
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item = current_index.internalPointer()
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comm.communicator.item_selected.emit(item)
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def update(self):
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data_model = TreeModel(self._file_handler, TreeType.Data)
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metadata_model = TreeModel(self._file_handler, TreeType.Metadata)
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self._data_tree.setModel(data_model)
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selection_model = QItemSelectionModel(data_model)
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self._data_tree.setSelectionModel(selection_model)
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selection_model.currentChanged.connect(self.dataTreeSelection)
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self._mdata_tree.setModel(metadata_model)
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for i in range(data_model.columnCount(None)):
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self._data_tree.resizeColumnToContents(i)
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self._mdata_tree.resizeColumnToContents(i)
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def reset(self):
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pass
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class SplashScreen(QWidget):
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keyPressed = pyqtSignal(int)
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def __init__(self, parent=None) -> None:
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super().__init__(parent=parent)
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layout = QGridLayout()
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self.setLayout(layout)
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self.setStyleSheet("background-color: white;")
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label = QLabel()
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label.setPixmap(QPixmap("./icons/nixview256.png"))
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label.setAlignment(Qt.AlignCenter)
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layout.addWidget(label, 1, 1)
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verticalSpacer = QSpacerItem(20, 40, QSizePolicy.Minimum, QSizePolicy.Expanding)
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verticalSpacer2 = QSpacerItem(20, 40, QSizePolicy.Minimum, QSizePolicy.Expanding)
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hSpacer = QSpacerItem(400, 20, QSizePolicy.Maximum, QSizePolicy.Expanding)
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hSpacer2 = QSpacerItem(400, 20, QSizePolicy.Maximum, QSizePolicy.Expanding)
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layout.addItem(verticalSpacer, 0, 1)
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layout.addItem(verticalSpacer2, 2, 1)
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layout.addItem(hSpacer, 1, 0)
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layout.addItem(hSpacer2, 1, 2)
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frame = QFrame()
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l = QVBoxLayout()
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l.addWidget(QLabel("Recently opened files:"))
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self._file_list = QListWidget(self)
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self._file_list.setSelectionMode(QAbstractItemView.SingleSelection)
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self._file_list.itemClicked.connect(self._on_file_clicked)
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self.keyPressed.connect(self._on_key_pressed)
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l.addWidget(self._file_list)
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frame.setLayout(l)
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layout.addWidget(frame, 3, 1)
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self._file_map = {}
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self._read_recent_files()
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def keyPressEvent(self, event):
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super(SplashScreen, self).keyPressEvent(event)
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if event.key() == Qt.Key_Return:
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self.keyPressed.emit(event.key())
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def _create_short_filename(self, original, index, max_len=40):
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short = original
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parts = original.split(os.sep)
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if len(parts) == 1:
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short = "%i: %s" % (index, short[:max_len])
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else:
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post = parts[-1]
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if len(post) > max_len - 4:
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post = post[:max_len - 4]
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short = str("%i: " % index) + "... " + post
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else:
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short = str("%i: " % index) + " ... ".join([original[:max_len - len(post) - 4], post])
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return short
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def _read_recent_files(self):
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settings = QSettings(cnst.organization, cnst.application)
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filenames = settings.value(cnst.settings_recent_files_key, [])
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del settings
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for i, f in enumerate(filenames):
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shortname = self._create_short_filename(f, i + 1, max_len=38)
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self._file_map[shortname] = f
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item = QListWidgetItem(shortname)
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item.setToolTip(f)
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self._file_list.addItem(item)
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def reset(self):
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self._file_list.clear()
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self._read_recent_files()
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def _on_file_clicked(self, item):
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comm.communicator.open_recent.emit(self._file_map[item.text()])
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def _on_key_pressed(self, key):
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item = self._file_list.currentItem()
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print(item)
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if item is not None and key == Qt.Key_Return:
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comm.communicator.open_recent.emit(self._file_map[item.text()])
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