Undo: clear undo history on load / import

Keeping undo-history across load makes little sense. The user was
expressly reminded that they have unsaved work.

For import (from other logs or the dive-computer) an undo-functionality
would be desirable. Nevertheless, this is rather complex since
new and old dives are merged. Implementation would require a finer
backend<->undocommand interface. Thus, leave this for now until more
experience with the undo system is acquired.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

desktop-widgets/divelogimportdialog.cpp

@@ -7,6 +7,7 @@
 #include <QDrag>
 #include <QMimeData>
 #include <QRegExp>
+#include <QUndoStack>
 #include "core/qthelper.h"
 #include "core/import-csv.h"
 
@@ -1008,6 +1009,7 @@ void DiveLogImportDialog::on_buttonBox_accepted()
 	}
 
 	process_imported_dives(&table, false, false);
+	MainWindow::instance()->undoStack->clear();
 	MainWindow::instance()->refreshDisplay();
 }
 

desktop-widgets/downloadfromdivecomputer.cpp

@@ -14,6 +14,7 @@
 #include <QMessageBox>
 #include <QShortcut>
 #include <QTimer>
+#include <QUndoStack>
 
 DownloadFromDCWidget::DownloadFromDCWidget(QWidget *parent, Qt::WindowFlags f) : QDialog(parent, f),
 	downloading(false),
@@ -507,6 +508,7 @@ void DownloadFromDCWidget::on_ok_clicked()
 		// first new dive) and select it again after processing all the dives
 		int uniqId = downloadTable.dives[downloadTable.nr - 1]->id;
 		process_imported_dives(&downloadTable, preferDownloaded(), true);
+		MainWindow::instance()->undoStack->clear();
 		// after process_imported_dives does any merging or resorting needed, we need
 		// to recreate the model for the dive list so we can select the newest dive
 		MainWindow::instance()->recreateDiveList();

desktop-widgets/mainwindow.cpp

@@ -618,6 +618,7 @@ void MainWindow::on_actionCloudstorageopen_triggered()
 	if (!parse_file(fileNamePtr.data(), &dive_table))
 		setCurrentFile(fileNamePtr.data());
 	process_loaded_dives();
+	undoStack->clear();
 	hideProgressBar();
 	refreshDisplay();
 }
@@ -1740,6 +1741,7 @@ void MainWindow::importFiles(const QStringList fileNames)
 		parse_file(fileNamePtr.data(), &table);
 	}
 	process_imported_dives(&table, false, false);
+	undoStack->clear();
 	refreshDisplay();
 }
 
@@ -1762,6 +1764,7 @@ void MainWindow::loadFiles(const QStringList fileNames)
 	hideProgressBar();
 	updateRecentFiles();
 	process_loaded_dives();
+	undoStack->clear();
 
 	refreshDisplay();