Details
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Bug
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Resolution: Unresolved
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P3: Somewhat important
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None
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6.5.4
Description
It happens when render Sanskirt letters (probably also some other letters that I haven't tested) using certain fonts. Those certain fonts include, but probably not limited to, MS Gothic, Times New Roman, Consolas. When those fonts are used, space width for Sanskirt is different from most of other letters.
Meanwhile, some other fonts, e.g. Arial, MS UI Gothic, Noto Sans, do not have such problem.
A reproducer (I tested both QTextEdit and QPlainTextEdit and both show the issue):
#include <QApplication> #include <QMainWindow> #include <QPlainTextEdit> #include <QVBoxLayout> //#define PLAINTEXT int main(int argc, char** argv) { QApplication app(argc, argv); QMainWindow* mainWin = new QMainWindow(); #ifdef PLAINTEXT QPlainTextEdit* textEdit = new QPlainTextEdit(mainWin); textEdit->setLineWrapMode(QPlainTextEdit::NoWrap); #else QTextEdit* textEdit = new QTextEdit(mainWin); #endif QFont font(QString::fromLocal8Bit("MS Gothic"), 10); textEdit->setFont(font); QStringList strs { u8" 안녕하세요：ハングル", u8" नमस्ते：サンスクリット", u8" Olá：ポルトガル", u8" 你好：中国", u8" こんにちは：日本", u8" Grüß Gott：ドイツ", u8" Buenos días.：スペイン", u8" สวัสดี：タイ", u8" Здравствуйте：ロシア", u8" Xin chào：ベトナム" }; for (const QString& str : strs) { #ifdef PLAINTEXT textEdit->appendPlainText(str); #else textEdit->append(str); #endif textEdit->moveCursor(QTextCursor::End, QTextCursor::MoveAnchor); } QVBoxLayout* layout = new QVBoxLayout; layout->addWidget(textEdit, 1); mainWin->setLayout(layout); textEdit->resize(1200, 800); mainWin->resize(1250, 850); mainWin->show(); qDebug() << textEdit->font(); return app.exec(); }
The result of MS Gothic (Sanskrit letter has narrower space):
The result of Times New Roman (Sanskrit letter has wider space):
The result of Arial (all letters have the same space width and are aligned as expected):
Is it the problem of font files themselves or how Qt handles those fonts?
