now waveforms and thumbnails are cached

dialogs/loaddialog.cpp

@@ -0,0 +1,30 @@
+#include "loaddialog.h"
+
+#include <QHBoxLayout>
+#include <QVBoxLayout>
+#include <QLabel>
+#include <QProgressBar>
+#include <QPushButton>
+
+LoadDialog::LoadDialog(QWidget *parent) : QDialog(parent) {
+	setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+
+	QVBoxLayout* layout = new QVBoxLayout();
+	setLayout(layout);
+
+	layout->addWidget(new QLabel("Loading ''..."));
+
+	bar = new QProgressBar();
+	bar->setValue(50);
+	layout->addWidget(bar);
+
+	QPushButton* cancel_button = new QPushButton("Cancel");
+	connect(cancel_button, SIGNAL(clicked(bool)), this, SLOT(reject()));
+
+	QHBoxLayout* hboxLayout = new QHBoxLayout();
+	hboxLayout->addStretch();
+	hboxLayout->addWidget(cancel_button);
+	hboxLayout->addStretch();
+
+	layout->addLayout(hboxLayout);
+}