beginning to refactor onionshare_gui to work with multiple files (#66)

onionshare_gui/file_selection.py

@@ -0,0 +1,145 @@
+import os
+from PyQt4 import QtCore, QtGui
+
+import common
+from onionshare import strings, helpers
+
+class FileList(QtGui.QListWidget):
+    files_dropped = QtCore.pyqtSignal()
+
+    def __init__(self, parent=None):
+        super(FileList, self).__init__(parent)
+        self.setAcceptDrops(True)
+        self.setIconSize(QtCore.QSize(32, 32))
+
+        # drag and drop label
+        self.drop_label = QtGui.QLabel(QtCore.QString(strings._('gui_drag_and_drop')), parent=self)
+        self.drop_label.setAlignment(QtCore.Qt.AlignCenter)
+        self.drop_label.setStyleSheet('background: url({0}/drop_files.png) no-repeat center center; color: #999999;'.format(common.onionshare_gui_dir))
+        self.drop_label.hide()
+
+        self.filenames = []
+        self.update()
+
+    def update(self):
+        # file list should have a background image if empty
+        if len(self.filenames) == 0:
+            self.drop_label.show()
+        else:
+            self.drop_label.hide()
+
+    def resizeEvent(self, event):
+        self.drop_label.setGeometry(0, 0, self.width(), self.height())
+
+    def dragEnterEvent(self, event):
+        if event.mimeData().hasUrls:
+            event.accept()
+        else:
+            event.ignore()
+
+    def dragMoveEvent(self, event):
+        if event.mimeData().hasUrls:
+            event.setDropAction(QtCore.Qt.CopyAction)
+            event.accept()
+        else:
+            event.ignore()
+
+    def dropEvent(self, event):
+        if event.mimeData().hasUrls:
+            event.setDropAction(QtCore.Qt.CopyAction)
+            event.accept()
+            for url in event.mimeData().urls():
+                filename = str(url.toLocalFile())
+                self.add_file(filename)
+        else:
+            event.ignore()
+        self.files_dropped.emit()
+
+    def add_file(self, filename):
+        if filename not in self.filenames:
+            self.filenames.append(filename)
+
+            basename = os.path.basename(filename)
+            fileinfo = QtCore.QFileInfo(filename)
+            ip = QtGui.QFileIconProvider()
+            icon = ip.icon(fileinfo)
+
+            if os.path.isfile(filename):
+                size = self.human_readable_filesize(fileinfo.size())
+            else:
+                size = self.human_readable_filesize(helpers.dir_size(filename))
+            item = QtGui.QListWidgetItem('{0} ({1})'.format(basename, size))
+            item.setToolTip(QtCore.QString(size))
+            
+            item.setIcon(icon)
+            self.addItem(item)
+
+    def human_readable_filesize(self, b):
+        thresh = 1024.0
+        if b < thresh:
+            return '{0} B'.format(b)
+        units = ['KiB','MiB','GiB','TiB','PiB','EiB','ZiB','YiB']
+        u = 0
+        b /= thresh
+        while b >= thresh:
+            b /= thresh
+            u += 1
+        return '{0} {1}'.format(round(b, 1), units[u])
+
+class FileSelection(QtGui.QVBoxLayout):
+    def __init__(self):
+        super(FileSelection, self).__init__()
+
+        # file list
+        self.file_list = FileList()
+        self.file_list.currentItemChanged.connect(self.update)
+        self.file_list.files_dropped.connect(self.update)
+
+        # buttons
+        self.add_files_button = QtGui.QPushButton(strings._('gui_add_files'))
+        self.add_files_button.clicked.connect(self.add_files)
+        self.add_dir_button = QtGui.QPushButton(strings._('gui_add_folder'))
+        self.add_dir_button.clicked.connect(self.add_dir)
+        self.delete_button = QtGui.QPushButton(strings._('gui_delete'))
+        self.delete_button.clicked.connect(self.delete_file)
+        button_layout = QtGui.QHBoxLayout()
+        button_layout.addWidget(self.add_files_button)
+        button_layout.addWidget(self.add_dir_button)
+        button_layout.addWidget(self.delete_button)
+
+        # add the widgets
+        self.addWidget(self.file_list)
+        self.addLayout(button_layout)
+
+        self.update()
+
+    def update(self):
+        # delete button should be disabled if item isn't selected
+        current_item = self.file_list.currentItem()
+        if not current_item:
+            self.delete_button.setEnabled(False)
+        else:
+            self.delete_button.setEnabled(True)
+
+        # update the file list
+        self.file_list.update()
+
+    def add_files(self):
+        filenames = QtGui.QFileDialog.getOpenFileNames(caption=strings._('gui_choose_files'), options=QtGui.QFileDialog.ReadOnly)
+        if filenames:
+            for filename in filenames:
+                self.file_list.add_file(str(filename))
+        self.update()
+
+    def add_dir(self):
+        filename = QtGui.QFileDialog.getExistingDirectory(caption=strings._('gui_choose_folder'), options=QtGui.QFileDialog.ReadOnly)
+        if filename:
+            self.file_list.add_file(str(filename))
+        self.update()
+
+    def delete_file(self):
+        current_row = self.file_list.currentRow()
+        self.file_list.filenames.pop(current_row)
+        self.file_list.takeItem(current_row)
+        self.update()
+