Add getMultiLineText static method to QInputDialog

Change-Id: I6d43772f6ee66c6c43d64fb3d18f2a5f0c894a00
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

2 files changed, 110 insertions, 11 deletions

diff --git a/src/widgets/dialogs/qinputdialog.cpp b/src/widgets/dialogs/qinputdialog.cpp
index 45aa49d552..c1f8deb4eb 100644
--- a/src/widgets/dialogs/qinputdialog.cpp
+++ b/src/widgets/dialogs/qinputdialog.cpp
@@ -49,6 +49,7 @@
 #include "qlabel.h"
 #include "qlayout.h"
 #include "qlineedit.h"
+#include "qplaintextedit.h"
 #include "qlistwidget.h"
 #include "qpushbutton.h"
 #include "qspinbox.h"
@@ -167,6 +168,7 @@ public:
 
     void ensureLayout();
     void ensureLineEdit();
+    void ensurePlainTextEdit();
     void ensureComboBox();
     void ensureListView();
     void ensureIntSpinBox();
@@ -180,11 +182,13 @@ public:
     void ensureLayout() const { const_cast<QInputDialogPrivate *>(this)->ensureLayout(); }
     bool useComboBoxOrListView() const { return comboBox && comboBox->count() > 0; }
     void _q_textChanged(const QString &text);
+    void _q_plainTextEditTextChanged();
     void _q_currentRowChanged(const QModelIndex &newIndex, const QModelIndex &oldIndex);
 
     mutable QLabel *label;
     mutable QDialogButtonBox *buttonBox;
     mutable QLineEdit *lineEdit;
+    mutable QPlainTextEdit *plainTextEdit;
     mutable QSpinBox *intSpinBox;
     mutable QDoubleSpinBox *doubleSpinBox;
     mutable QComboBox *comboBox;
@@ -198,8 +202,8 @@ public:
 };
 
 QInputDialogPrivate::QInputDialogPrivate()
-    : label(0), buttonBox(0), lineEdit(0), intSpinBox(0), doubleSpinBox(0), comboBox(0), listView(0),
-      inputWidget(0), mainLayout(0)
+    : label(0), buttonBox(0), lineEdit(0), plainTextEdit(0), intSpinBox(0), doubleSpinBox(0),
+      comboBox(0), listView(0), inputWidget(0), mainLayout(0)
 {
 }
 
@@ -250,6 +254,21 @@ void QInputDialogPrivate::ensureLineEdit()
     }
 }
 
+void QInputDialogPrivate::ensurePlainTextEdit()
+{
+    Q_Q(QInputDialog);
+    if (!plainTextEdit) {
+        plainTextEdit = new QPlainTextEdit(q);
+        plainTextEdit->setLineWrapMode(QPlainTextEdit::NoWrap);
+#ifndef QT_NO_IM
+        qt_widget_private(plainTextEdit)->inheritsInputMethodHints = 1;
+#endif
+        plainTextEdit->hide();
+        QObject::connect(plainTextEdit, SIGNAL(textChanged()),
+                         q, SLOT(_q_plainTextEditTextChanged()));
+    }
+}
+
 void QInputDialogPrivate::ensureComboBox()
 {
     Q_Q(QInputDialog);
@@ -344,6 +363,8 @@ void QInputDialogPrivate::setInputWidget(QWidget *widget)
     // textValue
     if (widget == lineEdit) {
         lineEdit->setText(textValue);
+    } else if (widget == plainTextEdit) {
+        plainTextEdit->setPlainText(textValue);
     } else if (widget == comboBox) {
         setComboBoxText(textValue);
     } else if (widget == listView) {
@@ -364,6 +385,9 @@ void QInputDialogPrivate::chooseRightTextInputWidget()
         } else {
             widget = comboBox;
         }
+    } else if (opts & QInputDialog::UsePlainTextEditForTextInput) {
+        ensurePlainTextEdit();
+        widget = plainTextEdit;
     } else {
         ensureLineEdit();
         widget = lineEdit;
@@ -417,6 +441,16 @@ void QInputDialogPrivate::_q_textChanged(const QString &text)
     }
 }
 
+void QInputDialogPrivate::_q_plainTextEditTextChanged()
+{
+    Q_Q(QInputDialog);
+    QString text = plainTextEdit->toPlainText();
+    if (textValue != text) {
+        textValue = text;
+        emit q->textValueChanged(text);
+    }
+}
+
 void QInputDialogPrivate::_q_currentRowChanged(const QModelIndex &newIndex,
                                                const QModelIndex & /* oldIndex */)
 {
@@ -434,8 +468,8 @@ void QInputDialogPrivate::_q_currentRowChanged(const QModelIndex &newIndex,
     The input value can be a string, a number or an item from a list. A label
     must be set to tell the user what they should enter.
 
-    Four static convenience functions are provided: getText(), getInt(),
-    getDouble(), and getItem(). All the functions can be used in a similar way,
+    Five static convenience functions are provided: getText(), getMultiLineText(),
+    getInt(), getDouble(), and getItem(). All the functions can be used in a similar way,
     for example:
 
     \snippet dialogs/standarddialogs/dialog.cpp 3
@@ -575,6 +609,8 @@ QString QInputDialog::labelText() const
     \value NoButtons Don't display \uicontrol{OK} and \uicontrol{Cancel} buttons (useful for "live dialogs").
     \value UseListViewForComboBoxItems Use a QListView rather than a non-editable QComboBox for
                                        displaying the items set with setComboBoxItems().
+    \value UsePlainTextEditForTextInput Use a QPlainTextEdit for multiline text input. This value was
+                                       introduced in 5.2.
 
     \sa options, setOption(), testOption()
 */
@@ -628,6 +664,8 @@ void QInputDialog::setOptions(InputDialogOptions options)
         d->buttonBox->setVisible(!(options & NoButtons));
     if ((changed & UseListViewForComboBoxItems) && inputMode() == TextInput)
         d->chooseRightTextInputWidget();
+    if ((changed & UsePlainTextEditForTextInput) && inputMode() == TextInput)
+        d->chooseRightTextInputWidget();
 }
 
 QInputDialog::InputDialogOptions QInputDialog::options() const
@@ -653,6 +691,8 @@ void QInputDialog::setTextValue(const QString &text)
     setInputMode(TextInput);
     if (d->inputWidget == d->lineEdit) {
         d->lineEdit->setText(text);
+    } else if (d->inputWidget == d->plainTextEdit) {
+        d->plainTextEdit->setPlainText(text);
     } else if (d->inputWidget == d->comboBox) {
         d->setComboBoxText(text);
     } else {
@@ -1075,6 +1115,8 @@ void QInputDialog::setVisible(bool visible)
         d->inputWidget->setFocus();
         if (d->inputWidget == d->lineEdit) {
             d->lineEdit->selectAll();
+        } else if (d->inputWidget == d->plainTextEdit) {
+            d->plainTextEdit->selectAll();
         } else if (d->inputWidget == d->intSpinBox) {
             d->intSpinBox->selectAll();
         } else if (d->inputWidget == d->doubleSpinBox) {
@@ -1144,7 +1186,7 @@ void QInputDialog::done(int result)
     want to do this, you should create the dialog yourself using one of the
     QInputDialog constructors.
 
-    \sa getInt(), getDouble(), getItem()
+    \sa getInt(), getDouble(), getItem(), getMultiLineText()
 */
 
 QString QInputDialog::getText(QWidget *parent, const QString &title, const QString &label,
@@ -1169,6 +1211,58 @@ QString QInputDialog::getText(QWidget *parent, const QString &title, const QStri
 }
 
 /*!
+    \since 5.2
+
+    Static convenience function to get a multiline string from the user.
+
+    \a title is the text which is displayed in the title bar of the dialog.
+    \a label is the text which is shown to the user (it should say what should
+    be entered).
+    \a text is the default text which is placed in the plain text edit.
+    \a inputMethodHints is the input method hints that will be used in the
+    edit widget if an input method is active.
+
+    If \a ok is nonnull \e *\a ok will be set to true if the user pressed
+    \uicontrol OK and to false if the user pressed \uicontrol Cancel. The dialog's parent
+    is \a parent. The dialog will be modal and uses the specified widget
+    \a flags.
+
+    If the dialog is accepted, this function returns the text in the dialog's
+    plain text edit. If the dialog is rejected, a null QString is returned.
+
+    Use this static function like this:
+
+    \snippet dialogs/standarddialogs/dialog.cpp 4
+
+    \warning Do not delete \a parent during the execution of the dialog. If you
+    want to do this, you should create the dialog yourself using one of the
+    QInputDialog constructors.
+
+    \sa getInt(), getDouble(), getItem(), getText()
+*/
+
+QString QInputDialog::getMultiLineText(QWidget *parent, const QString &title, const QString &label,
+                                       const QString &text, bool *ok, Qt::WindowFlags flags,
+                                       Qt::InputMethodHints inputMethodHints)
+{
+    QInputDialog dialog(parent, flags);
+    dialog.setOptions(QInputDialog::UsePlainTextEditForTextInput);
+    dialog.setWindowTitle(title);
+    dialog.setLabelText(label);
+    dialog.setTextValue(text);
+    dialog.setInputMethodHints(inputMethodHints);
+
+    int ret = dialog.exec();
+    if (ok)
+        *ok = !!ret;
+    if (ret) {
+        return dialog.textValue();
+    } else {
+        return QString();
+    }
+}
+
+/*!
     \since 4.5
 
     Static convenience function to get an integer input from the user.
@@ -1196,7 +1290,7 @@ QString QInputDialog::getText(QWidget *parent, const QString &title, const QStri
     want to do this, you should create the dialog yourself using one of the
     QInputDialog constructors.
 
-    \sa getText(), getDouble(), getItem()
+    \sa getText(), getDouble(), getItem(), getMultiLineText()
 */
 
 int QInputDialog::getInt(QWidget *parent, const QString &title, const QString &label, int value,
@@ -1248,7 +1342,7 @@ int QInputDialog::getInt(QWidget *parent, const QString &title, const QString &l
     want to do this, you should create the dialog yourself using one of the
     QInputDialog constructors.
 
-    \sa getText(), getDouble(), getItem()
+    \sa getText(), getDouble(), getItem(), getMultiLineText()
 */
 
 /*!
@@ -1277,7 +1371,7 @@ int QInputDialog::getInt(QWidget *parent, const QString &title, const QString &l
     want to do this, you should create the dialog yourself using one of the
     QInputDialog constructors.
 
-    \sa getText(), getInt(), getItem()
+    \sa getText(), getInt(), getItem(), getMultiLineText()
 */
 
 double QInputDialog::getDouble(QWidget *parent, const QString &title, const QString &label,
@@ -1331,7 +1425,7 @@ double QInputDialog::getDouble(QWidget *parent, const QString &title, const QStr
     want to do this, you should create the dialog yourself using one of the
     QInputDialog constructors.
 
-    \sa getText(), getInt(), getDouble()
+    \sa getText(), getInt(), getDouble(), getMultiLineText()
 */
 
 QString QInputDialog::getItem(QWidget *parent, const QString &title, const QString &label,
diff --git a/src/widgets/dialogs/qinputdialog.h b/src/widgets/dialogs/qinputdialog.h
index 41dca1f94f..c2c85835c8 100644
--- a/src/widgets/dialogs/qinputdialog.h
+++ b/src/widgets/dialogs/qinputdialog.h
@@ -78,8 +78,9 @@ class Q_WIDGETS_EXPORT QInputDialog : public QDialog
 
 public:
     enum InputDialogOption {
-        NoButtons                   = 0x00000001,
-        UseListViewForComboBoxItems = 0x00000002
+        NoButtons                    = 0x00000001,
+        UseListViewForComboBoxItems  = 0x00000002,
+        UsePlainTextEditForTextInput = 0x00000004
     };
 
     Q_DECLARE_FLAGS(InputDialogOptions, InputDialogOption)
@@ -168,6 +169,9 @@ public:
                            QLineEdit::EchoMode echo = QLineEdit::Normal,
                            const QString &text = QString(), bool *ok = 0, Qt::WindowFlags flags = 0,
                            Qt::InputMethodHints inputMethodHints = Qt::ImhNone);
+    static QString getMultiLineText(QWidget *parent, const QString &title, const QString &label,
+                           const QString &text = QString(), bool *ok = 0, Qt::WindowFlags flags = 0,
+                           Qt::InputMethodHints inputMethodHints = Qt::ImhNone);
     static QString getItem(QWidget *parent, const QString &title, const QString &label,
                            const QStringList &items, int current = 0, bool editable = true,
                            bool *ok = 0, Qt::WindowFlags flags = 0,
@@ -204,6 +208,7 @@ public:
 private:
     Q_DISABLE_COPY(QInputDialog)
     Q_PRIVATE_SLOT(d_func(), void _q_textChanged(const QString&))
+    Q_PRIVATE_SLOT(d_func(), void _q_plainTextEditTextChanged())
     Q_PRIVATE_SLOT(d_func(), void _q_currentRowChanged(const QModelIndex&, const QModelIndex&))
 };