rewrote debug message handler

dialogs/debugdialog.cpp

@@ -0,0 +1,26 @@
+#include "debugdialog.h"
+
+#include <QTextEdit>
+#include <QVBoxLayout>
+
+#include "debug.h"
+
+DebugDialog* debug_dialog = NULL;
+
+DebugDialog::DebugDialog(QWidget *parent) : QDialog(parent) {
+	setWindowTitle("Debug Log");
+
+	QVBoxLayout* layout = new QVBoxLayout();
+	setLayout(layout);
+
+	textEdit = new QTextEdit();
+	layout->addWidget(textEdit);
+}
+
+void DebugDialog::update_log() {
+	textEdit->setHtml(get_debug_str());
+}
+
+void DebugDialog::showEvent(QShowEvent *) {
+	update_log();
+}