[Macro] Use a key catcher line edit to get modifier(s) for recent macros

src/Gui/DlgSettingsMacro.ui

@@ -336,16 +336,10 @@
       </spacer>
      </item>
      <item row="2" column="5" colspan="3">
-      <widget class="Gui::PrefLineEdit" name="ShortcutModifiers">
+      <widget class="Gui::ModifierLineEdit" name="ShortcutModifiers">
        <property name="toolTip">
         <string>Keyboard modifiers, default = Ctrl+Shift+</string>
        </property>
-       <property name="prefEntry" stdset="0">
-        <cstring>ShortcutModifiers</cstring>
-       </property>
-       <property name="prefPath" stdset="0">
-        <cstring>RecentMacros</cstring>
-       </property>
       </widget>
      </item>
     </layout>
@@ -369,9 +363,9 @@
  <layoutdefault spacing="6" margin="11"/>
  <customwidgets>
  <customwidget>
-  <class>Gui::PrefLineEdit</class>
+  <class>Gui::ModifierLineEdit</class>
   <extends>QLineEdit</extends>
-  <header>Gui/PrefWidgets.h</header>
+  <header>Gui/Widgets.h</header>
  </customwidget>
  <customwidget>
   <class>Gui::PrefSpinBox</class>

src/Gui/DlgSettingsMacroImp.cpp

@@ -82,7 +82,8 @@ void DlgSettingsMacroImp::saveSettings()
     ui->FileLogCheckBox->onSave();
     ui->MacroPath_2->onSave();
     ui->RecentMacros->onSave();
-    ui->ShortcutModifiers->onSave();
+    ParameterGrp::handle hGrp = WindowParameter::getDefaultParameter()->GetGroup("RecentMacros");
+    hGrp->SetASCII("ShortcutModifiers", qPrintable(ui->ShortcutModifiers->text()));
     ui->ShortcutCount->onSave();
     setRecentMacroSize();
 }
@@ -97,7 +98,8 @@ void DlgSettingsMacroImp::loadSettings()
     ui->FileLogCheckBox->onRestore();
     ui->MacroPath_2->onRestore();
     ui->RecentMacros->onRestore();
-    ui->ShortcutModifiers->onRestore();
+    ParameterGrp::handle hGrp = WindowParameter::getDefaultParameter()->GetGroup("RecentMacros");
+    ui->ShortcutModifiers->setText(QString::fromStdString(hGrp->GetASCII("ShortcutModifiers", "Ctrl+Shift+")));
     ui->ShortcutCount->onRestore();
 }
 

src/Gui/Widgets.cpp

@@ -463,6 +463,66 @@ void AccelLineEdit::keyPressEvent ( QKeyEvent * e)
 
 // ------------------------------------------------------------------------------
 
+/* TRANSLATOR Gui::ModifierLineEdit */
+
+/**
+ * Constructs a line edit with no text.
+ * The \a parent argument is sent to the QLineEdit constructor.
+ */
+ModifierLineEdit::ModifierLineEdit ( QWidget * parent )
+  : QLineEdit(parent)
+{
+    setPlaceholderText(tr("none"));
+}
+
+/**
+ * Checks which modifiers are pressed and show it as text.
+ */
+void ModifierLineEdit::keyPressEvent ( QKeyEvent * e)
+{
+    int key = e->key();
+    Qt::KeyboardModifiers state = e->modifiers();
+
+    switch(key) {
+    case Qt::Key_Backspace:
+    case Qt::Key_Delete:
+        clear();
+        return;
+    case Qt::Key_Control:
+    case Qt::Key_Shift:
+    case Qt::Key_Alt:
+    case Qt::Key_Meta:
+        break;;
+    default:
+        return;
+    }
+
+    clear();
+    QString txtLine;
+
+    // Handles modifiers applying a mask.
+    if ((state & Qt::ControlModifier) == Qt::ControlModifier) {
+        QKeySequence ks(Qt::CTRL);
+        txtLine += ks.toString(QKeySequence::NativeText);
+    }
+    if ((state & Qt::AltModifier) == Qt::AltModifier) {
+        QKeySequence ks(Qt::ALT);
+        txtLine += ks.toString(QKeySequence::NativeText);
+    }
+    if ((state & Qt::ShiftModifier) == Qt::ShiftModifier) {
+        QKeySequence ks(Qt::SHIFT);
+        txtLine += ks.toString(QKeySequence::NativeText);
+    }
+    if ((state & Qt::MetaModifier) == Qt::MetaModifier) {
+        QKeySequence ks(Qt::META);
+        txtLine += ks.toString(QKeySequence::NativeText);
+    }
+
+    setText(txtLine);
+}
+
+// ------------------------------------------------------------------------------
+
 #if QT_VERSION >= 0x050200
 ClearLineEdit::ClearLineEdit (QWidget * parent)
   : QLineEdit(parent)

src/Gui/Widgets.h

@@ -149,6 +149,22 @@ private:
 
 // ------------------------------------------------------------------------------
 
+/**
+ * The ModifierLineEdit class provides a lineedit to specify modifiers.
+ */
+class GuiExport ModifierLineEdit : public QLineEdit
+{
+  Q_OBJECT
+
+public:
+    ModifierLineEdit(QWidget * parent=0);
+
+protected:
+    void keyPressEvent(QKeyEvent * e);
+};
+
+// ------------------------------------------------------------------------------
+
 /**
  * The ClearLineEdit class adds a clear button at the right side.
  * http://stackoverflow.com/questions/21232224/qlineedit-with-custom-button