1 files changed, 151 insertions, 0 deletions
diff --git a/dggui/stackedwidget.cc b/dggui/stackedwidget.cc
new file mode 100644
index 0000000..05f8f3c
--- /dev/null
+++ b/dggui/stackedwidget.cc
@@ -0,0 +1,151 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            stackedwidget.cc
+ *
+ *  Mon Nov 21 19:36:49 CET 2016
+ *  Copyright 2016 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU Lesser General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  DrumGizmo 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 Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "stackedwidget.h"
+
+namespace GUI
+{
+
+StackedWidget::StackedWidget(Widget *parent)
+	: Widget(parent)
+{
+	CONNECT(this, sizeChangeNotifier, this, &StackedWidget::sizeChanged);
+}
+
+StackedWidget::~StackedWidget()
+{
+}
+
+void StackedWidget::addWidget(Widget *widget)
+{
+	widgets.push_back(widget);
+	widget->reparent(this);
+
+	if(currentWidget == nullptr)
+	{
+		setCurrentWidget(widget);
+	}
+	else
+	{
+		widget->setVisible(false);
+	}
+}
+
+void StackedWidget::removeWidget(Widget *widget)
+{
+	if(widget == currentWidget)
+	{
+		setCurrentWidget(nullptr);
+	}
+
+	widgets.remove(widget);
+}
+
+Widget *StackedWidget::getCurrentWidget() const
+{
+	return currentWidget;
+}
+
+void StackedWidget::setCurrentWidget(Widget *widget)
+{
+	if(widget == currentWidget)
+	{
+		return;
+	}
+
+	if(currentWidget)
+	{
+		currentWidget->setVisible(false);
+	}
+
+	currentWidget = widget;
+
+	if(currentWidget)
+	{
+		currentWidget->move(0, 0);
+		currentWidget->resize(width(), height());
+		currentWidget->setVisible(true);
+	}
+
+	currentChanged(currentWidget);
+}
+
+Widget* StackedWidget::getWidgetAfter(Widget* widget)
+{
+	bool found_it{false};
+
+	for(auto w : widgets)
+	{
+		if(found_it)
+		{
+			return w;
+		}
+
+		if(w == widget)
+		{
+			found_it = true;
+		}
+	}
+
+	if(found_it)
+	{
+		// widget was the last in the list.
+		return nullptr;
+	}
+
+	// The Widget pointed to by 'widget' was not in the list...
+	return nullptr;
+}
+
+Widget* StackedWidget::getWidgetBefore(Widget* widget)
+{
+	Widget* last{nullptr};
+
+	for(auto w : widgets)
+	{
+		if(w == widget)
+		{
+			return last;
+		}
+
+		last = w;
+	}
+
+	// The Widget pointed to by 'widget' was not in the list...
+	return nullptr;
+}
+
+void StackedWidget::sizeChanged(int width, int height)
+{
+	// Propagate size change to child:
+	if(currentWidget)
+	{
+		currentWidget->move(0, 0);
+		currentWidget->resize(width, height);
+	}
+}
+
+} // GUI::