0ad/source/gui/ObjectBases/IGUIPanel.cpp
Vantha 5a92c22d90
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Compute actual size of GUI objects lazily
This shifts the responsibility of updating the actual size more towards
IGUIObject, and enables only ever doing it when the value is actually
needed. This allows us to remove the delay of size changed
notifications, since the value is now already recalculated as
infrequently as possible anyways.

All of that ensures that the actual size (returned by GetActualSize) is
always up-to-date e.g. when reading it from the parent, which was
previously broken.

Fixes #8200
2026-04-12 00:17:02 +02:00

58 lines
1.4 KiB
C++

/* Copyright (C) 2026 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. 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.
*
* 0 A.D. 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 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#include "precompiled.h"
#include "IGUIPanel.h"
#include "gui/CGUI.h"
#include "gui/CGUISetting.h"
#include "ps/CStr.h"
#include <map>
#include <string>
#include <vector>
IGUIPanel::IGUIPanel(CGUI& pGUI)
: IGUIObject(pGUI)
{
}
IGUIPanel::~IGUIPanel()
{
}
bool IGUIPanel::IsMouseOver() const
{
GetActualSize(); // Updates m_CachedLayoutActualSize if necessary.
return m_CachedLayoutActualSize.PointInside(m_pGUI.GetMousePos());
}
void IGUIPanel::RecalculateActualSize() const
{
IGUIObject::RecalculateActualSize();
m_CachedLayoutActualSize = m_CachedActualSize;
}
const std::vector<IGUIObject*>& IGUIPanel::GetVisibleChildren() const
{
if (m_Drawing)
return m_Children;
static std::vector<IGUIObject*> emptyVector;
return emptyVector;
}