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Diffstat (limited to 'gui/widgets/scrollcontainer.cpp')
| -rw-r--r-- | gui/widgets/scrollcontainer.cpp | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/gui/widgets/scrollcontainer.cpp b/gui/widgets/scrollcontainer.cpp new file mode 100644 index 0000000000..9a7792730d --- /dev/null +++ b/gui/widgets/scrollcontainer.cpp @@ -0,0 +1,153 @@ +/* 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, uint32 reflowCmd) + : Widget(boss, x, y, w, h), CommandSender(nullptr), _reflowCmd(reflowCmd) { + init(); +} + +ScrollContainerWidget::ScrollContainerWidget(GuiObject *boss, const Common::String &name, uint32 reflowCmd) + : Widget(boss, name), CommandSender(nullptr), _reflowCmd(reflowCmd) { + 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 && ptr->isVisible()) { + int y = ptr->getAbsY() - getChildY(); + min = MIN(min, y - spacing); + max = MAX(max, y + ptr->getHeight() + spacing); + } + ptr = ptr->next(); + } + h = max - min; + + if (h <= _limitH) _scrolledY = 0; + + _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(); + } + + //hide and move widgets, if needed + sendCommand(_reflowCmd, 0); + + //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 = ptr->isVisible(); + 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 + _verticalScroll->recalc(); +} + +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 |