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feat: create delegate for project item views

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This allows us to define custom painting for list view items. In
particular, this is applied to the mod downloader, in order to allow
displaying both the mod name and mod description, and settings their
effects (like bold or underline) independent of each other.

Signed-off-by: flow <flowlnlnln@gmail.com>
This commit is contained in:
flow 2022-07-14 22:23:41 -03:00
parent 0f61f5ba03
commit 4a13dbe3bb
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GPG key ID: 8D0F221F0A59F469
8 changed files with 139 additions and 24 deletions
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22
launcher/ui/widgets/Common.cpp
View file

@ -1,27 +1,33 @@
#include "Common.h"
// Origin: Qt
QStringList viewItemTextLayout(QTextLayout &textLayout, int lineWidth, qreal &height,
qreal &widthUsed)
// More specifically, this is a trimmed down version on the algorithm in:
// https://code.woboq.org/qt5/qtbase/src/widgets/styles/qcommonstyle.cpp.html#846
QList<std::pair<qreal, QString>> viewItemTextLayout(QTextLayout& textLayout, int lineWidth, qreal& height)
{
QStringList lines;
QList<std::pair<qreal, QString>> lines;
height = 0;
widthUsed = 0;
textLayout.beginLayout();
QString str = textLayout.text();
while (true)
{
while (true) {
QTextLine line = textLayout.createLine();
if (!line.isValid())
break;
if (line.textLength() == 0)
break;
line.setLineWidth(lineWidth);
line.setPosition(QPointF(0, height));
height += line.height();
lines.append(str.mid(line.textStart(), line.textLength()));
widthUsed = qMax(widthUsed, line.naturalTextWidth());
lines.append(std::make_pair(line.naturalTextWidth(), str.mid(line.textStart(), line.textLength())));
}
textLayout.endLayout();
return lines;
}