Implemented precalulation of sizeHint

For the following classes:
* ComboBoxDelegate
* DateEditDelegate
* TimeEditDelegate
* SpinBoxEditDelegate

src/Gui/StyledItemDelegates.cpp

@@ -82,6 +82,7 @@ ComboBoxDelegate::ComboBoxDelegate
 (QObject *parent)
 : QStyledItemDelegate(parent)
 {
+    fillSizeHint();
 }
 
 
@@ -90,6 +91,7 @@ ComboBoxDelegate::addItems
 (const QStringList &texts)
 {
     this->texts = texts;
+    fillSizeHint();
 }
 
 
@@ -162,9 +164,17 @@ ComboBoxDelegate::sizeHint
     Q_UNUSED(option)
     Q_UNUSED(index)
 
+    return _sizeHint;
+}
+
+
+void
+ComboBoxDelegate::fillSizeHint
+()
+{
     QComboBox widget;
     widget.addItems(texts);
-    return widget.sizeHint();
+    _sizeHint = widget.sizeHint();
 }
 
 
@@ -370,14 +380,16 @@ SpinBoxEditDelegate::SpinBoxEditDelegate
 (QObject *parent)
 : QStyledItemDelegate(parent)
 {
+    fillSizeHint();
 }
 
 
 void
-SpinBoxEditDelegate::setMininum
+SpinBoxEditDelegate::setMinimum
 (int minimum)
 {
     this->minimum = minimum;
+    fillSizeHint();
 }
 
 
@@ -386,6 +398,7 @@ SpinBoxEditDelegate::setMaximum
 (int maximum)
 {
     this->maximum = maximum;
+    fillSizeHint();
 }
 
 
@@ -395,6 +408,7 @@ SpinBoxEditDelegate::setRange
 {
     this->minimum = minimum;
     this->maximum = maximum;
+    fillSizeHint();
 }
 
 
@@ -411,6 +425,7 @@ SpinBoxEditDelegate::setSuffix
 (const QString &suffix)
 {
     this->suffix = suffix;
+    fillSizeHint();
 }
 
 
@@ -419,6 +434,7 @@ SpinBoxEditDelegate::setShowSuffixOnEdit
 (bool show)
 {
     showSuffixOnEdit = show;
+    fillSizeHint();
 }
 
 
@@ -427,6 +443,7 @@ SpinBoxEditDelegate::setShowSuffixOnDisplay
 (bool show)
 {
     showSuffixOnDisplay = show;
+    fillSizeHint();
 }
 
 
@@ -494,13 +511,21 @@ SpinBoxEditDelegate::sizeHint
     Q_UNUSED(option)
     Q_UNUSED(index)
 
+    return _sizeHint;
+}
+
+
+void
+SpinBoxEditDelegate::fillSizeHint
+()
+{
     QSpinBox widget;
     if ((showSuffixOnEdit || showSuffixOnDisplay) && ! suffix.isEmpty()) {
         widget.setSuffix(" " + suffix);
     }
     widget.setMaximum(maximum);
     widget.setValue(maximum);
-    return widget.sizeHint();
+    _sizeHint = widget.sizeHint();
 }
 
 
@@ -676,6 +701,7 @@ DateEditDelegate::DateEditDelegate
 (QObject *parent)
 : QStyledItemDelegate(parent)
 {
+    fillSizeHint();
 }
 
 
@@ -684,6 +710,7 @@ DateEditDelegate::setCalendarPopup
 (bool enable)
 {
     calendarPopup = enable;
+    fillSizeHint();
 }
 
 
@@ -738,8 +765,17 @@ DateEditDelegate::sizeHint
     Q_UNUSED(option)
     Q_UNUSED(index)
 
+    return _sizeHint;
+}
+
+
+void
+DateEditDelegate::fillSizeHint
+()
+{
     QDateEdit widget;
-    return widget.sizeHint();
+    widget.setCalendarPopup(calendarPopup);
+    _sizeHint = widget.sizeHint();
 }
 
 
@@ -749,6 +785,7 @@ TimeEditDelegate::TimeEditDelegate
 (QObject *parent)
 : QStyledItemDelegate(parent)
 {
+    fillSizeHint();
 }
 
 
@@ -757,6 +794,7 @@ TimeEditDelegate::setFormat
 (const QString &format)
 {
     this->format = format;
+    fillSizeHint();
 }
 
 
@@ -765,6 +803,7 @@ TimeEditDelegate::setSuffix
 (const QString &suffix)
 {
     this->suffix = suffix;
+    fillSizeHint();
 }
 
 
@@ -773,6 +812,7 @@ TimeEditDelegate::setShowSuffixOnEdit
 (bool show)
 {
     showSuffixOnEdit = show;
+    fillSizeHint();
 }
 
 
@@ -781,6 +821,7 @@ TimeEditDelegate::setShowSuffixOnDisplay
 (bool show)
 {
     showSuffixOnDisplay = show;
+    fillSizeHint();
 }
 
 
@@ -866,6 +907,14 @@ TimeEditDelegate::sizeHint
     Q_UNUSED(option)
     Q_UNUSED(index)
 
+    return _sizeHint;
+}
+
+
+void
+TimeEditDelegate::fillSizeHint
+()
+{
     QTimeEdit widget;
     widget.setTime(QTime(0, 0, 0));
     QString f = format;
@@ -876,5 +925,5 @@ TimeEditDelegate::sizeHint
         f += " '" + suffix + "'";
     }
     widget.setDisplayFormat(f);
-    return widget.sizeHint();
+    _sizeHint = widget.sizeHint();
 }

src/Gui/StyledItemDelegates.h

@@ -68,6 +68,9 @@ private slots:
 
 private:
     QStringList texts;
+    QSize _sizeHint;
+
+    void fillSizeHint();
 };
 
 
@@ -128,7 +131,7 @@ class SpinBoxEditDelegate: public QStyledItemDelegate
 public:
     SpinBoxEditDelegate(QObject *parent = nullptr);
 
-    void setMininum(int minimum);
+    void setMinimum(int minimum);
     void setMaximum(int maximum);
     void setRange(int minimum, int maximum);
     void setSingleStep(int val);
@@ -149,6 +152,9 @@ private:
     QString suffix;
     bool showSuffixOnEdit = true;
     bool showSuffixOnDisplay = true;
+    QSize _sizeHint;
+
+    void fillSizeHint();
 };
 
 
@@ -203,6 +209,9 @@ public:
 
 private:
     bool calendarPopup = false;
+    QSize _sizeHint;
+
+    void fillSizeHint();
 };
 
 
@@ -231,6 +240,9 @@ private:
     bool showSuffixOnDisplay = true;
     QTime min;
     QTime max;
+    QSize _sizeHint;
+
+    void fillSizeHint();
 };
 
 #endif