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/* 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;
_backgroundType = ThemeEngine::kDialogBackgroundDefault;
_verticalScroll = new ScrollBarWidget(this, _w-16, 0, 16, _h);
_verticalScroll->setTarget(this);
_scrolledX = 0;
_scrolledY = 0;
_limitH = 140;
recalc();
}
void ScrollContainerWidget::handleMouseWheel(int x, int y, int direction) {
_verticalScroll->handleMouseWheel(x, y, direction);
}
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;
if (_scrolledY > h - _limitH) _scrolledY = 0;
_verticalScroll->_numEntries = h;
_verticalScroll->_currentPos = _scrolledY;
_verticalScroll->_entriesPerPage = _limitH;
_verticalScroll->_singleStep = kLineHeight;
_verticalScroll->setPos(_w - scrollbarWidth, _scrolledY);
_verticalScroll->setSize(scrollbarWidth, _limitH-1);
}
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();
g_gui.scheduleTopDialogRedraw();
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()->drawDialogBackground(Common::Rect(_x, _y, _x + _w, _y + getHeight()), _backgroundType);
}
bool ScrollContainerWidget::containsWidget(Widget *w) const {
if (w == _verticalScroll || _verticalScroll->containsWidget(w))
return true;
return containsWidgetInChain(_firstWidget, w);
}
Widget *ScrollContainerWidget::findWidget(int x, int y) {
if (_verticalScroll->isVisible() && x >= _w - _verticalScroll->getWidth())
return _verticalScroll;
Widget *w = Widget::findWidgetInChain(_firstWidget, x + _scrolledX, y + _scrolledY);
if (w)
return w;
return this;
}
Common::Rect ScrollContainerWidget::getClipRect() const {
// Make sure the clipping rect contains the scrollbar so it is properly redrawn
return Common::Rect(getAbsX(), getAbsY(), getAbsX() + _w, getAbsY() + getHeight() - 1); // this -1 is because of container border, which might not be present actually
}
void ScrollContainerWidget::setBackgroundType(ThemeEngine::DialogBackground backgroundType) {
_backgroundType = backgroundType;
}
} // End of namespace GUI
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