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/*
This file is part of Warzone 2100.
Copyright (C) 2021 Warzone 2100 Project
Warzone 2100 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.
Warzone 2100 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 Warzone 2100; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef __INCLUDED_LIB_WIDGET_GRIDLAYOUT_H__
#define __INCLUDED_LIB_WIDGET_GRIDLAYOUT_H__
#include <nonstd/optional.hpp>
#include <map>
#include <set>
#include "widget.h"
#include "gridallocation.h"
class GridLayout: public WIDGET
{
public:
struct Placement
{
public:
Placement(grid_allocation::slot column, grid_allocation::slot row, std::shared_ptr<WIDGET> widget);
grid_allocation::slot column;
grid_allocation::slot row;
std::shared_ptr<WIDGET> widget;
};
GridLayout();
void place(grid_allocation::slot columnAllocation, grid_allocation::slot rowAllocation, std::shared_ptr<WIDGET> widget);
int32_t idealWidth() override;
int32_t idealHeight() override;
nonstd::optional<std::vector<uint32_t>> getScrollSnapOffsets() override;
const std::map<uint32_t, int32_t> &getColumnOffsets();
const std::map<uint32_t, int32_t> &getRowOffsets();
protected:
void displayRecursive(WidgetGraphicsContext const &context) override;
void geometryChanged() override;
private:
typedef std::function<grid_allocation::item(const GridLayout::Placement)> PlacementTransformer;
void updateLayout();
void invalidateLayout();
void invalidateAllocation();
std::vector<grid_allocation::item> getAllocationItems(PlacementTransformer placementTransformer);
static grid_allocation::item placementColumn(GridLayout::Placement placement);
static grid_allocation::item placementRow(GridLayout::Placement placement);
grid_allocation::allocator &getColumnAllocator();
grid_allocation::allocator &getRowAllocator();
nonstd::optional<grid_allocation::allocator> columnAllocation;
nonstd::optional<grid_allocation::allocator> rowAllocation;
std::vector<Placement> placements;
bool layoutDirty = false;
std::vector<uint32_t> scrollSnapOffsets;
std::map<uint32_t, int32_t> columnOffsets;
std::map<uint32_t, int32_t> rowOffsets;
};
#endif // __INCLUDED_LIB_WIDGET_GRIDLAYOUT_H__
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