Fixed adding and deleting children from MappingTreeModel

Another fix to MappingTreeModel's new database layout. I think we're
getting there...

Insert the mappings into mapping_parents2 and add the MapParentId to the
newly created index in the model. For now, the added date remains
invalid. Make it possible (again?) to add root items to
MappingTreeModel. For this I had to design a new QDialog with a
checkbox.

This one fixes another bug in SmTreeModel: Don't call parent() on a null
pointer.

Sometimes I'm getting random SIGBUS-Signals, but maybe that's because of
the debug build of qt I'm using. Couldn't track it down yet...

1 files changed, 55 insertions, 4 deletions

diff --git a/mappingtreewidget.cpp b/mappingtreewidget.cpp
index 7e62ba3..1897cf1 100644
--- a/mappingtreewidget.cpp
+++ b/mappingtreewidget.cpp
@@ -12,6 +12,8 @@
 #include <QVBoxLayout>
 #include <QHBoxLayout>
 #include <QInputDialog>
+#include <QCheckBox>
+#include <QLabel>
 #include <QStringListModel>
 #include <QMessageBox>
 #include <QSettings>
@@ -103,8 +105,12 @@ MappingData MappingTreeWidget::selectedItem() const {
 }
 
 void MappingTreeWidget::addChild(){
-    QModelIndex sel = selected();
-    QString value = QInputDialog::getText(this, tr("Mapping name"), tr("Enter mapping name"));
+    MappingInputDialog dlg(this);
+    int retval = dlg.exec();
+    if(retval != QDialog::Accepted){
+        return;
+    }
+    QString value = dlg.mappingName();
     if(value.isEmpty()){
         return;
     }
@@ -113,8 +119,16 @@ void MappingTreeWidget::addChild(){
         QMessageBox::critical(this, tr("Error"), msg);
         return;
     }
-    QModelIndex real = mProxy->mapToSource(sel);
-    mModel->addChild(value, real);
+    QModelIndex sel = selected();
+    QModelIndex parent = mModel->rootIndex();
+    if(!dlg.createRoot()){
+        QModelIndex sel = selected();
+        parent = mProxy->mapToSource(sel);
+    }
+    if(!mModel->addChild(value, parent)){
+        QString err = QString(tr("Error: Database said: %1")).arg(mModel->lastError().text());
+        QMessageBox::critical(this, tr("Error"), err);
+    }
 }
 
 void MappingTreeWidget::addType(){
@@ -311,6 +325,43 @@ void MappingEditWidget::setMappings(const QList<MappingData> &mappings){
     mMappingResult->expandAll();
 }
 
+MappingInputDialog::MappingInputDialog(QWidget *parent, Qt::WindowFlags f) : QDialog(parent, f){
+    mOk = new QPushButton(tr("Ok"));
+    connect(mOk, SIGNAL(clicked()), this, SLOT(accept()));
+    mCancel = new QPushButton(tr("Cancel"));
+    connect(mCancel, SIGNAL(clicked()), this, SLOT(reject()));
+    mIsRoot = new QCheckBox(tr("Create root item"));
+    mEditor = new QLineEdit;
+
+    QHBoxLayout *buttonLayout = new QHBoxLayout;
+    buttonLayout->addStretch();
+    buttonLayout->addWidget(mOk);
+    buttonLayout->addWidget(mCancel);
+
+    QVBoxLayout* inputLayout = new QVBoxLayout;
+    QLabel *caption = new QLabel(tr("Enter mapping name"));
+    inputLayout->addWidget(caption);
+    inputLayout->addWidget(mEditor);
+
+    QHBoxLayout *cbLayout = new QHBoxLayout;
+    cbLayout->addStretch();
+    cbLayout->addWidget(mIsRoot);
+
+    QVBoxLayout *mainLayout = new QVBoxLayout;
+    mainLayout->addLayout(inputLayout);
+    mainLayout->addLayout(cbLayout);
+    mainLayout->addLayout(buttonLayout);
+    setLayout(mainLayout);
+}
+
+QString MappingInputDialog::mappingName() const{
+    return mEditor->text();
+}
+
+bool MappingInputDialog::createRoot() const {
+    return mIsRoot->checkState() == Qt::Checked;
+}
+
 MappingEditDialog::MappingEditDialog(QWidget *parent, Qt::WindowFlags f) : QDialog(parent, f){
     mEditWidget = new MappingEditWidget;
     mOk = new QPushButton(tr("Ok"));