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Write font descriptions in the stable Qt 5 10/11-field format

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QFont::toString() is not stable across Qt versions: Qt 6.11 switched to
a 19-field format carrying OpenType weights, which QFont::fromString()
of Qt 5.x and Qt <= 6.10 rejects, leaving a broken font. Projects saved
by a Qt 6.11+ build were therefore unreadable by older builds.

Add QETUtils::fontToString() composing the legacy 10/11-field
description (weight mapped back to the legacy scale with the same
closest-match table Qt uses when parsing) and use it at every site that
stores a font description in a project, element, table config or
settings file. Every Qt version from 5.15 through 6.12-beta parses this
form correctly, so files stay readable by every QET build in
circulation.

See issue #553.
This commit is contained in:
Dieter Mayer
2026-07-30 21:45:23 +02:00
parent 120ca08209
commit 5da1fe5fc8
11 changed files with 77 additions and 11 deletions
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sources/ui/configpage/generalconfigurationpage.cpp
+3 -2
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@@ -21,6 +21,7 @@
#include "../../qeticons.h"
#include "ui_generalconfigurationpage.h"
#include "../../utils/qetsettings.h"
#include "../../utils/qetutils.h"
#include "../../qetmessagebox.h"
#include <QFileDialog>
#include <QFontDialog>
@@ -459,7 +460,7 @@ void GeneralConfigurationPage::on_m_dyn_text_font_pb_clicked()
QFont font = QFontDialog::getFont(&ok, curFont, this);
if (ok)
{
settings.setValue("diagrameditor/dynamic_text_font", font.toString());
settings.setValue("diagrameditor/dynamic_text_font", QETUtils::fontToString(font));
QString fontInfos = font.family() + " " +
QString::number(font.pointSize()) + " (" +
font.styleName() + ")";
@@ -563,7 +564,7 @@ void GeneralConfigurationPage::on_m_indi_text_font_pb_clicked()
QFont font = QFontDialog::getFont(&ok, curFont, this);
if (ok)
{
settings.setValue("diagrameditor/independent_text_font", font.toString());
settings.setValue("diagrameditor/independent_text_font", QETUtils::fontToString(font));
QString fontInfos = font.family() + " " +
QString::number(font.pointSize()) + " (" +
font.styleName() + ")";