flowcontainer.cpp

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/*
 * The ManaPlus Client
 * Copyright (C) 2009-2010 The Mana Developers
 * Copyright (C) 2011-2019 The ManaPlus Developers
 * Copyright (C) 2019-2021 Andrei Karas
 *
 * This file is part of The ManaPlus Client.
 *
 * 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
 * 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, see <http://www.gnu.org/licenses/>.
 */
 
#include "gui/widgets/flowcontainer.h"
 
#include "debug.h"
 
FlowContainer::FlowContainer(const Widget2 *const widget,
 const int boxWidth,
 const int boxHeight) :
 Container(widget),
 WidgetListener(),
 mBoxWidth(boxWidth),
 mBoxHeight(boxHeight),
 mGridWidth(1),
 mGridHeight(1)
{
 addWidgetListener(this);
 if (mBoxWidth == 0)
 mBoxWidth = 1;
 if (mBoxHeight == 0)
 mBoxHeight = 1;
}
 
void FlowContainer::widgetResized(const Event &event A_UNUSED)
{
 if (getWidth() < mBoxWidth)
 {
 setWidth(mBoxWidth);
 return;
 }
 
 const int itemCount = CAST_S32(mWidgets.size());
 
 if (mBoxWidth == 0)
 mGridWidth = getWidth();
 else
 mGridWidth = getWidth() / mBoxWidth;
 
 if (mGridWidth < 1)
 mGridWidth = 1;
 
 mGridHeight = itemCount / mGridWidth;
 
 if (itemCount % mGridWidth != 0 || mGridHeight < 1)
 ++mGridHeight;
 
 int height = mGridHeight * mBoxHeight;
 
 if (getHeight() != height)
 {
 setHeight(height);
 return;
 }
 
 int i = 0;
 height = 0;
 for (WidgetList::const_iterator it = mWidgets.begin();
 it != mWidgets.end(); ++it)
 {
 const int x = i % mGridWidth * mBoxWidth;
 (*it)->setPosition(x, height);
 
 i++;
 
 if (i % mGridWidth == 0)
 height += mBoxHeight;
 }
}
 
void FlowContainer::add(Widget *const widget)
{
 if (widget == nullptr)
 return;
 
 Container::add(widget);
 widget->setSize(mBoxWidth, mBoxHeight);
 widgetResized(Event(nullptr));
}