Introduce TextoutputLabel: Resizes automatically with text

qsrun.pro

@@ -12,6 +12,7 @@ HEADERS += calculationengine.h \
            entrypushbutton.h \
            settingsprovider.h \
            singleinstanceserver.h \
+           textoutputlabel.h \
            window.h
 SOURCES += calculationengine.cpp \
            entryprovider.cpp \
@@ -19,6 +20,7 @@ SOURCES += calculationengine.cpp \
            main.cpp \
            settingsprovider.cpp \
            singleinstanceserver.cpp \
+           textoutputlabel.cpp \
            window.cpp
 QT += widgets sql network
 QT_CONFIG -= no-pkg-config

textoutputlabel.cpp

@@ -0,0 +1,37 @@
+#include "textoutputlabel.h"
+
+TextoutputLabel::TextoutputLabel()
+{
+	QFont font;
+	font.setPointSize(48);
+	font.setBold(true);
+	this->setFont(font);
+	this->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+	this->setAlignment(Qt::AlignCenter);
+	this->setContextMenuPolicy(Qt::ContextMenuPolicy::CustomContextMenu);
+}
+
+void TextoutputLabel::setText(const QString &text)
+{
+	QLabel::setText(text);
+	QFont currentFont = this->font();
+	int calculatedPointSize = currentFont.pointSize();
+	QFontMetrics fm(currentFont);
+	int contentWidth = this->contentsRect().width() - this->margin();
+	while(calculatedPointSize < 48 && fm.boundingRect(this->text()).width() < contentWidth)
+	{
+		calculatedPointSize += 1;
+		currentFont.setPointSize(calculatedPointSize);
+		fm = QFontMetrics(currentFont);
+	}
+	while(fm.boundingRect(this->text()).width() >= contentWidth)
+	{
+		calculatedPointSize -= 1;
+		currentFont.setPointSize(calculatedPointSize);
+		fm = QFontMetrics(currentFont);
+	}
+	this->setFont(currentFont);
+}
+
+
+

textoutputlabel.h

@@ -0,0 +1,14 @@
+#ifndef TEXTOUTPUTLABEL_H
+#define TEXTOUTPUTLABEL_H
+#include <QLabel>
+
+class TextoutputLabel : public QLabel
+{
+public:
+	TextoutputLabel();
+	virtual void setText(const QString &text);
+
+
+};
+
+#endif // TEXTOUTPUTLABEL_H