# -*- coding: utf-8 -*- # vim: autoindent shiftwidth=4 expandtab textwidth=120 tabstop=4 softtabstop=4 ############################################################################### # OpenLP - Open Source Lyrics Projection # # --------------------------------------------------------------------------- # # Copyright (c) 2008-2015 OpenLP Developers # # --------------------------------------------------------------------------- # # This program is free software; you can redistribute it and/or modify it # # under the terms of the GNU General Public License as published by the Free # # Software Foundation; version 2 of the License. # # # # This program is distributed in the hope that it will be useful, but WITHOUT # # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or # # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for # # more details. # # # # You should have received a copy of the GNU General Public License along # # with this program; if not, write to the Free Software Foundation, Inc., 59 # # Temple Place, Suite 330, Boston, MA 02111-1307 USA # ############################################################################### from PyQt4 import QtGui, QtCore from openlp.core.common import Registry, translate from openlp.plugins.alerts.lib.db import AlertItem from .alertdialog import Ui_AlertDialog class AlertForm(QtGui.QDialog, Ui_AlertDialog): """ Provide UI for the alert system """ def __init__(self, plugin): """ Initialise the alert form """ self.manager = plugin.manager self.plugin = plugin self.item_id = None super(AlertForm, self).__init__(Registry().get('main_window')) self.setupUi(self) self.display_button.clicked.connect(self.on_display_clicked) self.display_close_button.clicked.connect(self.on_display_close_clicked) self.alert_text_edit.textChanged.connect(self.on_text_changed) self.new_button.clicked.connect(self.on_new_click) self.save_button.clicked.connect(self.on_save_all) self.alert_list_widget.doubleClicked.connect(self.on_double_click) self.alert_list_widget.clicked.connect(self.on_single_click) self.alert_list_widget.currentRowChanged.connect(self.on_current_row_changed) def exec_(self): """ Execute the dialog and return the exit code. """ self.display_button.setEnabled(False) self.display_close_button.setEnabled(False) self.alert_text_edit.setText('') return QtGui.QDialog.exec_(self) def load_list(self): """ Loads the list with alerts. """ self.alert_list_widget.clear() alerts = self.manager.get_all_objects(AlertItem, order_by_ref=AlertItem.text) for alert in alerts: item_name = QtGui.QListWidgetItem(alert.text) item_name.setData(QtCore.Qt.UserRole, alert.id) self.alert_list_widget.addItem(item_name) if alert.text == str(self.alert_text_edit.text()): self.item_id = alert.id self.alert_list_widget.setCurrentRow(self.alert_list_widget.row(item_name)) def on_display_clicked(self): """ Display the current alert text. """ self.trigger_alert(self.alert_text_edit.text()) def on_display_close_clicked(self): """ Close the alert preview. """ if self.trigger_alert(self.alert_text_edit.text()): self.close() def on_delete_button_clicked(self): """ Deletes the selected item. """ item = self.alert_list_widget.currentItem() if item: item_id = item.data(QtCore.Qt.UserRole) self.manager.delete_object(AlertItem, item_id) row = self.alert_list_widget.row(item) self.alert_list_widget.takeItem(row) self.item_id = None self.alert_text_edit.setText('') def on_new_click(self): """ Create a new alert. """ if not self.alert_text_edit.text(): QtGui.QMessageBox.information(self, translate('AlertsPlugin.AlertForm', 'New Alert'), translate('AlertsPlugin.AlertForm', 'You haven\'t specified any text for your alert. \n' 'Please type in some text before clicking New.')) else: alert = AlertItem() alert.text = self.alert_text_edit.text() self.manager.save_object(alert) self.load_list() def on_save_all(self): """ Save the alert, we are editing. """ if self.item_id: alert = self.manager.get_object(AlertItem, self.item_id) alert.text = self.alert_text_edit.text() self.manager.save_object(alert) self.item_id = None self.load_list() self.save_button.setEnabled(False) def on_text_changed(self): """ Enable save button when data has been changed by editing the form. """ # Only enable the button, if we are editing an item. if self.item_id: self.save_button.setEnabled(True) if self.alert_text_edit.text(): self.display_button.setEnabled(True) self.display_close_button.setEnabled(True) else: self.display_button.setEnabled(False) self.display_close_button.setEnabled(False) def on_double_click(self): """ List item has been double clicked to display it. """ item = self.alert_list_widget.selectedIndexes()[0] list_item = self.alert_list_widget.item(item.row()) self.trigger_alert(list_item.text()) self.alert_text_edit.setText(list_item.text()) self.item_id = list_item.data(QtCore.Qt.UserRole) self.save_button.setEnabled(False) def on_single_click(self): """ List item has been single clicked to add it to the edit field so it can be changed. """ item = self.alert_list_widget.selectedIndexes()[0] list_item = self.alert_list_widget.item(item.row()) self.alert_text_edit.setText(list_item.text()) self.item_id = list_item.data(QtCore.Qt.UserRole) # If the alert does not contain '<>' we clear the ParameterEdit field. if self.alert_text_edit.text().find('<>') == -1: self.parameter_edit.setText('') self.save_button.setEnabled(False) def trigger_alert(self, text): """ Prepares the alert text for displaying. :param text: The alert text. """ if not text: return False # We found '<>' in the alert text, but the ParameterEdit field is empty. if text.find('<>') != -1 and not self.parameter_edit.text() and \ QtGui.QMessageBox.question(self, translate('AlertsPlugin.AlertForm', 'No Parameter Found'), translate('AlertsPlugin.AlertForm', 'You have not entered a parameter to be replaced.\n' 'Do you want to continue anyway?'), QtGui.QMessageBox.StandardButtons( QtGui.QMessageBox.No | QtGui.QMessageBox.Yes)) == QtGui.QMessageBox.No: self.parameter_edit.setFocus() return False # The ParameterEdit field is not empty, but we have not found '<>' # in the alert text. elif text.find('<>') == -1 and self.parameter_edit.text() and \ QtGui.QMessageBox.question(self, translate('AlertsPlugin.AlertForm', 'No Placeholder Found'), translate('AlertsPlugin.AlertForm', 'The alert text does not contain \'<>\'.\n' 'Do you want to continue anyway?'), QtGui.QMessageBox.StandardButtons( QtGui.QMessageBox.No | QtGui.QMessageBox.Yes)) == QtGui.QMessageBox.No: self.parameter_edit.setFocus() return False text = text.replace('<>', self.parameter_edit.text()) self.plugin.alerts_manager.display_alert(text) return True def on_current_row_changed(self, row): """ Called when the *alert_list_widget*'s current row has been changed. This enables or disables buttons which require an item to act on. :param row: The row (int). If there is no current row, the value is -1. """ if row == -1: self.display_button.setEnabled(False) self.display_close_button.setEnabled(False) self.save_button.setEnabled(False) self.delete_button.setEnabled(False) else: self.display_button.setEnabled(True) self.display_close_button.setEnabled(True) self.delete_button.setEnabled(True) # We do not need to enable the save button, as it is only enabled # when typing text in the "alert_text_edit".