1 files changed, 147 insertions, 0 deletions
diff --git a/gui/widgets/scrollcontainer.cpp b/gui/widgets/scrollcontainer.cpp
new file mode 100644
index 0000000000..1b38478c11
--- /dev/null
+++ b/gui/widgets/scrollcontainer.cpp
@@ -0,0 +1,147 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "common/util.h"
+#include "gui/widgets/scrollcontainer.h"
+#include "gui/gui-manager.h"
+
+#include "gui/ThemeEval.h"
+
+namespace GUI {
+
+ScrollContainerWidget::ScrollContainerWidget(GuiObject *boss, int x, int y, int w, int h)
+	: Widget(boss, x, y, w, h) {
+	init();
+}
+
+ScrollContainerWidget::ScrollContainerWidget(GuiObject *boss, const Common::String &name)
+	: Widget(boss, name) {
+	init();
+}
+
+void ScrollContainerWidget::init() {
+	setFlags(WIDGET_ENABLED);
+	_type = kScrollContainerWidget;
+	_verticalScroll = new ScrollBarWidget(this, _w-16, 0, 16, _h);
+	_verticalScroll->setTarget(this);
+	_scrolledX = 0;
+	_scrolledY = 0;
+	_limitH = 140;
+	recalc();
+}
+
+void ScrollContainerWidget::recalc() {
+	int scrollbarWidth = g_gui.xmlEval()->getVar("Globals.Scrollbar.Width", 0);
+	_limitH = _h;
+	
+	//calculate virtual height
+	const int spacing = g_gui.xmlEval()->getVar("Global.Font.Height", 16); //on the bottom
+	int h = 0;
+	int min = spacing, max = 0;
+	Widget *ptr = _firstWidget;
+	while (ptr) {
+		if (ptr != _verticalScroll) {
+			int y = ptr->getAbsY() - getChildY();
+			min = MIN(min, y - spacing);
+			max = MAX(max, y + ptr->getHeight() + spacing);
+		}
+		ptr = ptr->next();
+	}
+	h = max - min;
+
+	_verticalScroll->_numEntries = h;
+	_verticalScroll->_currentPos = _scrolledY;
+	_verticalScroll->_entriesPerPage = _limitH;
+	_verticalScroll->setPos(_w - scrollbarWidth, _scrolledY+1);
+	_verticalScroll->setSize(scrollbarWidth, _limitH -2);
+}
+
+
+ScrollContainerWidget::~ScrollContainerWidget() {}
+
+int16 ScrollContainerWidget::getChildX() const {
+	return getAbsX() - _scrolledX;
+}
+
+int16 ScrollContainerWidget::getChildY() const {
+	return getAbsY() - _scrolledY;
+}
+
+uint16 ScrollContainerWidget::getWidth() const {
+	return _w - (_verticalScroll->isVisible() ? _verticalScroll->getWidth() : 0);
+}
+
+uint16 ScrollContainerWidget::getHeight() const {
+	return _limitH;
+}
+
+void ScrollContainerWidget::handleCommand(CommandSender *sender, uint32 cmd, uint32 data) {
+	Widget::handleCommand(sender, cmd, data);
+	switch (cmd) {
+	case kSetPositionCmd:
+		_scrolledY = _verticalScroll->_currentPos;
+		reflowLayout();
+		draw();
+		g_gui.doFullRedraw();
+		break;
+	}
+}
+
+void ScrollContainerWidget::reflowLayout() {
+	Widget::reflowLayout();
+
+	//reflow layout of inner widgets
+	Widget *ptr = _firstWidget;
+	while (ptr) {
+		ptr->reflowLayout();
+		ptr = ptr->next();
+	}
+	
+	//recalculate height
+	recalc();
+
+	//hide those widgets which are out of visible area
+	ptr = _firstWidget;
+	while (ptr) {
+		int y = ptr->getAbsY() - getChildY();
+		int h = ptr->getHeight();
+		bool visible = true;
+		if (y + h - _scrolledY < 0) visible = false;
+		if (y - _scrolledY > _limitH) visible = false;
+		ptr->setVisible(visible);
+		ptr = ptr->next();
+	}
+
+	_verticalScroll->setVisible(_verticalScroll->_numEntries > _limitH); //show when there is something to scroll
+}
+
+void ScrollContainerWidget::drawWidget() {
+	g_gui.theme()->drawDialogBackgroundClip(Common::Rect(_x, _y, _x + _w, _y + getHeight() - 1), getBossClipRect(), ThemeEngine::kDialogBackgroundDefault);
+}
+
+Widget *ScrollContainerWidget::findWidget(int x, int y) {
+	if (_verticalScroll->isVisible() && x >= _w - _verticalScroll->getWidth())
+		return _verticalScroll;
+	return Widget::findWidgetInChain(_firstWidget, x + _scrolledX, y + _scrolledY);
+}
+
+} // End of namespace GUI