[Performous-commit] Tapio Vierros : Added a busy dialog to give user feedback when an operation takes long.

[Tapio V. <aa...@us...>]

Author: Tapio Vierros <tap...@gm...>
Date:   Tue Feb 22 11:00:26 2011 +0200

Added a busy dialog to give user feedback when an operation takes long.

---

 busydialog.hh      |   36 ++++++++++++++++++++++++++++++++++++
 editorapp.cc       |    3 +++
 notegraphwidget.cc |    3 +++
 3 files changed, 42 insertions(+), 0 deletions(-)

diff --git a/busydialog.hh b/busydialog.hh
new file mode 100644
index 0000000..f5b8fd2
--- /dev/null
+++ b/busydialog.hh
@@ -0,0 +1,36 @@
+#pragma once
+#include <QApplication>
+#include <QDialog>
+#include <QCloseEvent>
+#include <QProgressBar>
+#include <QVBoxLayout>
+#include <QElapsedTimer>
+
+class BusyDialog: public QDialog {
+public:
+	BusyDialog(QWidget *parent = NULL, int eventsInterval = 30): QDialog(parent), timer(), interval(eventsInterval), count() {
+		QProgressBar *progress = new QProgressBar(this);
+		progress->setRange(0,0);
+		setWindowTitle(tr("Working..."));
+		QVBoxLayout *vb = new QVBoxLayout(this);
+		vb->addWidget(progress);
+		setLayout(vb);
+		timer.start();
+	}
+	void operator()() {
+		if (count == 0) // Let's not process events all the time
+			QApplication::processEvents();
+		count = (count + 1) % interval;
+		// Only show the dialog after certainamount of time
+		if (timer.isValid() && timer.elapsed() > 1500) {
+			open();
+			timer.invalidate();
+		}
+	}
+protected:
+	void closeEvent(QCloseEvent* event) { event->ignore(); }
+private:
+	QElapsedTimer timer;
+	int interval;
+	int count;
+};
diff --git a/editorapp.cc b/editorapp.cc
index 162ca82..366a290 100644
--- a/editorapp.cc
+++ b/editorapp.cc
@@ -20,6 +20,7 @@
 #include "songwriter.hh"
 #include "textcodecselector.hh"
 #include "gettingstarted.hh"
+#include "busydialog.hh"
 
 namespace {
 	static const QString PROJECT_SAVE_FILE_EXTENSION = "songproject"; // FIXME: Nice extension here
@@ -163,11 +164,13 @@ void EditorApp::operationDone(const Operation &op)
 
 void EditorApp::doOpStack()
 {
+	BusyDialog busy(this);
 	noteGraph->clearNotes();
 	QString newMusic = "";
 	// Re-apply all operations in the stack
 	for (OperationStack::const_iterator opit = opStack.begin(); opit != opStack.end(); ++opit) {
 		//std::cout << "Doing op: " << opit->dump() << std::endl;
+		busy();
 		try {
 			if (opit->op() == "META") {
 				// META ops are handled differently:
diff --git a/notegraphwidget.cc b/notegraphwidget.cc
index e0e9e22..b8b1122 100644
--- a/notegraphwidget.cc
+++ b/notegraphwidget.cc
@@ -13,6 +13,7 @@
 #include "notegraphwidget.hh"
 #include "song.hh"
 #include "util.hh"
+#include "busydialog.hh"
 
 
 namespace {
@@ -56,11 +57,13 @@ NoteGraphWidget::NoteGraphWidget(QWidget *parent)
 
 void NoteGraphWidget::setLyrics(QString lyrics)
 {
+	BusyDialog busy(this, 5);
 	QTextStream ts(&lyrics, QIODevice::ReadOnly);
 
 	doOperation(Operation("CLEAR"));
 	bool firstNote = true;
 	while (!ts.atEnd()) {
+		busy();
 		// We want to loop one line at the time to insert line breaks
 		bool sentenceStart = true;
 		QString sentence = ts.readLine();