kwin/src/tiles/quicktile.h
Vlad Zahorodnii 826fb1cb29 Fix a crash that happens when resizing quick tiled window
QuickTile::setRelativeGeometry() and QuickRootTile::setVerticalSplit() or
QuickRootTile::setHorizontalSplit() can hit recursion when size
constraints start taking effect.

This change reworks how other quick tiles are resized. With the proposed
design, when relative geometry changes, QuickRootTile will notice that
and start resizing other tiles.

When QuickRootTile resizes horizontal or vertical split, it is going to
ignore QuickRootTile::relativeGeometryChanged() signals (m_resizedTile).
It prevents hitting the recursion and makes moving h/v splits more
predictable.

I do think that in order to make the tile design more robust to this
kind of bugs, it's worth splitting geometry in two kinds though - the
one that indicates the preferred geometry (implicitWidth/implicitHeight
in qtquick lingua) and the current geometry, the parent node then
monitors the preferred geometries and updates the current geometries.

BUG: 464621
2023-01-23 14:58:09 +02:00

52 lines
1.1 KiB
C++

/*
KWin - the KDE window manager
This file is part of the KDE project.
SPDX-FileCopyrightText: 2022 Marco Martin <mart@kde.org>
SPDX-License-Identifier: GPL-2.0-or-later
*/
#pragma once
#include "tile.h"
#include "utils/common.h"
#include <kwin_export.h>
namespace KWin
{
class KWIN_EXPORT QuickRootTile : public Tile
{
Q_OBJECT
public:
QuickRootTile(TileManager *tiling, Tile *parentItem = nullptr);
~QuickRootTile();
Tile *tileForMode(QuickTileMode mode);
Tile *tileForBorder(ElectricBorder border);
qreal horizontalSplit() const;
void setHorizontalSplit(qreal split);
qreal verticalSplit() const;
void setVerticalSplit(qreal split);
private:
void relayoutToFit(Tile *tile);
Tile *m_resizedTile = nullptr;
std::unique_ptr<Tile> m_leftVerticalTile;
std::unique_ptr<Tile> m_rightVerticalTile;
std::unique_ptr<Tile> m_topHorizontalTile;
std::unique_ptr<Tile> m_bottomHorizontalTile;
std::unique_ptr<Tile> m_topLeftTile;
std::unique_ptr<Tile> m_topRightTile;
std::unique_ptr<Tile> m_bottomLeftTile;
std::unique_ptr<Tile> m_bottomRightTile;
};
} // namespace KWin