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Qt: implement flow layout game grid

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This will allow us to properly style the grid and also remove the need to refresh the whole grid on a window resize
This commit is contained in:
Megamouse 2023-04-28 16:09:08 +02:00
parent 0b628cb50e
commit f115032095
48 changed files with 2563 additions and 1601 deletions
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89
rpcs3/rpcs3qt/flow_layout.cpp
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@ -51,14 +51,23 @@
#include <QtWidgets>
#include "flow_layout.h"
flow_layout::flow_layout(QWidget* parent, int margin, int hSpacing, int vSpacing)
: QLayout(parent), m_hSpace(hSpacing), m_vSpace(vSpacing)
flow_layout::flow_layout(QWidget* parent, int margin, bool dynamic_spacing, int hSpacing, int vSpacing)
: QLayout(parent)
, m_dynamic_spacing(dynamic_spacing)
, m_hSpaceInitial(hSpacing)
, m_vSpaceInitial(vSpacing)
, m_hSpace(hSpacing)
, m_vSpace(vSpacing)
{
setContentsMargins(margin, margin, margin, margin);
}
flow_layout::flow_layout(int margin, int hSpacing, int vSpacing)
: m_hSpace(hSpacing), m_vSpace(vSpacing)
flow_layout::flow_layout(int margin, bool dynamic_spacing, int hSpacing, int vSpacing)
: m_dynamic_spacing(dynamic_spacing)
, m_hSpaceInitial(hSpacing)
, m_vSpaceInitial(vSpacing)
, m_hSpace(hSpacing)
, m_vSpace(vSpacing)
{
setContentsMargins(margin, margin, margin, margin);
}
@ -76,10 +85,12 @@ void flow_layout::clear()
delete item;
}
itemList.clear();
m_positions.clear();
}
void flow_layout::addItem(QLayoutItem* item)
{
m_positions.append(position{ .row = -1, .col = -1 });
itemList.append(item);
}
@ -116,7 +127,10 @@ QLayoutItem* flow_layout::itemAt(int index) const
QLayoutItem* flow_layout::takeAt(int index)
{
if (index >= 0 && index < itemList.size())
{
m_positions.takeAt(index);
return itemList.takeAt(index);
}
return nullptr;
}
@ -167,13 +181,57 @@ int flow_layout::doLayout(const QRect& rect, bool testOnly) const
{
int left, top, right, bottom;
getContentsMargins(&left, &top, &right, &bottom);
QRect effectiveRect = rect.adjusted(+left, +top, -right, -bottom);
const QRect effectiveRect = rect.adjusted(+left, +top, -right, -bottom);
int x = effectiveRect.x();
int y = effectiveRect.y();
int lineHeight = 0;
int rows = 0;
int cols = 0;
for (QLayoutItem* item : qAsConst(itemList))
if (m_dynamic_spacing)
{
const int available_width = effectiveRect.width();
const int min_spacing = smartSpacing(QStyle::PM_LayoutHorizontalSpacing);
bool fits_into_width = true;
int width = 0;
int index = 0;
for (; index < itemList.size(); index++)
{
if (QLayoutItem* item = itemList.at(index))
{
const int new_width = width + item->sizeHint().width() + (width > 0 ? min_spacing : 0);
if (new_width > effectiveRect.width())
{
fits_into_width = false;
break;
}
width = new_width;
}
}
// Try to evenly distribute the items across the width
m_hSpace = (index == 0) ? -1 : ((available_width - width) / index);
if (fits_into_width)
{
// Make sure there aren't huge gaps between the items
m_hSpace = smartSpacing(QStyle::PM_LayoutHorizontalSpacing);
}
}
else
{
m_hSpace = m_hSpaceInitial;
}
for (int i = 0, row = 0, col = 0; i < itemList.size(); i++)
{
QLayoutItem* item = itemList.at(i);
if (!item)
continue;
const QWidget* wid = item->widget();
if (!wid)
continue;
@ -193,20 +251,33 @@ int flow_layout::doLayout(const QRect& rect, bool testOnly) const
y = y + lineHeight + spaceY;
nextX = x + item->sizeHint().width() + spaceX;
lineHeight = 0;
col = 0;
row++;
}
position& pos = m_positions[i];
pos.row = row;
pos.col = col++;
rows = std::max(rows, pos.row + 1);
cols = std::max(cols, pos.col + 1);
if (!testOnly)
item->setGeometry(QRect(QPoint(x, y), item->sizeHint()));
x = nextX;
lineHeight = qMax(lineHeight, item->sizeHint().height());
}
m_rows = rows;
m_cols = cols;
return y + lineHeight - rect.y() + bottom;
}
int flow_layout::smartSpacing(QStyle::PixelMetric pm) const
{
QObject* parent = this->parent();
const QObject* parent = this->parent();
if (!parent)
{
return -1;
@ -214,9 +285,9 @@ int flow_layout::smartSpacing(QStyle::PixelMetric pm) const
if (parent->isWidgetType())
{
QWidget* pw = static_cast<QWidget*>(parent);
const QWidget* pw = static_cast<const QWidget*>(parent);
return pw->style()->pixelMetric(pm, nullptr, pw);
}
return static_cast<QLayout*>(parent)->spacing();
return static_cast<const QLayout*>(parent)->spacing();
}