Split UI code into application/plugin UI and UI library.

1 files changed, 214 insertions, 0 deletions

diff --git a/dggui/tabwidget.cc b/dggui/tabwidget.cc
new file mode 100644
index 0000000..635f1bd
--- /dev/null
+++ b/dggui/tabwidget.cc
@@ -0,0 +1,214 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            tabwidget.cc
+ *
+ *  Thu Nov 24 17:46:22 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 "tabwidget.h"
+
+#include "painter.h"
+
+namespace GUI
+{
+
+TabWidget::TabWidget(Widget *parent)
+	: Widget(parent)
+	, stack(this)
+{
+	CONNECT(this, sizeChangeNotifier, this, &TabWidget::sizeChanged);
+	CONNECT(&stack, currentChanged, this, &TabWidget::setActiveButtons);
+}
+
+TabID TabWidget::addTab(const std::string& title, Widget* widget)
+{
+	buttons.emplace_back(this, widget);
+	auto& button = buttons.back();
+	button.setText(title);
+	stack.addWidget(widget);
+	CONNECT(&button, switchTabNotifier, this, &TabWidget::switchTab);
+	CONNECT(&button, scrollNotifier, this, &TabWidget::rotateTab);
+	sizeChanged(width(), height());
+	return button.getID();
+}
+
+void TabWidget::setTabWidth(std::size_t width)
+{
+	tab_width = width;
+	relayout();
+}
+
+std::size_t TabWidget::getTabWidth() const
+{
+	return tab_width;
+}
+
+void TabWidget::setVisible(TabID tab_id, bool visible)
+{
+	for (auto& button : buttons)
+	{
+		if(button.getID() == tab_id)
+		{
+			button.setVisible(visible);
+			relayout();
+			return;
+		}
+	}
+}
+
+std::size_t TabWidget::getBarHeight() const
+{
+	return topbar.height();
+}
+
+void TabWidget::rotateTab(float delta)
+{
+	Widget* widget{nullptr};
+	Widget* current = stack.getCurrentWidget();
+	if(delta > 0.0f)
+	{
+		while((widget = stack.getWidgetAfter(current)) != nullptr)
+		{
+			auto button = getButtonFromWidget(widget);
+			if(!button || !button->visible())
+			{
+				current = widget;
+				continue;
+			}
+			break;
+		}
+	}
+	else
+	{
+		while((widget = stack.getWidgetBefore(current)) != nullptr)
+		{
+			auto button = getButtonFromWidget(widget);
+			if(!button || !button->visible())
+			{
+				current = widget;
+				continue;
+			}
+			break;
+		}
+	}
+
+	if(widget)
+	{
+		switchTab(widget);
+	}
+}
+
+void TabWidget::switchTab(Widget* tab_widget)
+{
+	stack.setCurrentWidget(tab_widget);
+}
+
+void TabWidget::setActiveButtons(Widget* current_widget)
+{
+	for (auto& button : buttons) {
+		if (button.getTabWidget() == current_widget) {
+			button.setActive(true);
+		}
+		else
+		{
+			button.setActive(false);
+		}
+	}
+}
+
+void TabWidget::sizeChanged(int width, int height)
+{
+	std::size_t pos = 0;
+
+	int button_width = tab_width;
+	int bar_height = 25;
+	int button_border_width = 10;
+
+	int button_padding_left = 25;
+	int button_padding_inner = 3;
+	int logo_padding_right = button_padding_left / 2;
+
+	Painter p(*this);
+
+	if(buttons.size() > 0)
+	{
+		for(auto& button : buttons)
+		{
+			if(!button.visible())
+			{
+				continue;
+			}
+			int min_width = button.getMinimalWidth();
+			button_width = std::max(button_width, min_width + button_border_width);
+		}
+
+		button_width = std::min(button_width, width / (int)buttons.size());
+	}
+
+	// draw the upper bar
+	topbar.setSize(width, bar_height);
+	p.drawImage(0, 0, topbar);
+	auto x_logo = width - toplogo.width() - logo_padding_right;
+	auto y_logo = (bar_height - toplogo.height()) / 2;
+	p.drawImage(x_logo, y_logo, toplogo);
+
+	// place the buttons
+	pos = button_padding_left;
+	for(auto& button : buttons)
+	{
+		if(!button.visible())
+		{
+			continue;
+		}
+		button.resize(button_width, bar_height);
+		button.move(pos, 0);
+		pos += button_width + button_padding_inner;
+	}
+
+	stack.move(0, bar_height);
+	stack.resize(width, std::max((int)height - bar_height, 0));
+}
+
+void TabWidget::relayout()
+{
+	sizeChanged(TabWidget::width(), TabWidget::height()); // Force re-layout
+}
+
+const TabButton* TabWidget::getButtonFromWidget(const Widget* tab_widget)
+{
+	if(tab_widget == nullptr)
+	{
+		return nullptr;
+	}
+
+	for(auto& button : buttons)
+	{
+		if(button.getTabWidget() == tab_widget)
+		{
+			return &button;
+		}
+	}
+
+	return nullptr;
+}
+
+} // GUI::