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#include "lsscenemodel.h"
#include "lsglobals.h"
LSSceneModel::LSSceneModel(LYTLayout *layout, QObject *parent) :
QAbstractItemModel(parent)
{
m_layout = layout;
m_paneIcons[LYTPane::PaneType] = LSGlobals::getIcon("pane");
m_paneIcons[LYTPane::PictureType] = LSGlobals::getIcon("picture");
m_paneIcons[LYTPane::TextBoxType] = LSGlobals::getIcon("textbox");
m_paneIcons[LYTPane::WindowType] = LSGlobals::getIcon("window");
m_paneIcons[LYTPane::BoundingType] = LSGlobals::getIcon("bounding");
m_movingPaneParent = 0;
}
LSSceneModel::~LSSceneModel() {
if (m_movingPaneParent)
delete m_movingPaneParent;
}
QModelIndex LSSceneModel::index(int row, int column, const QModelIndex &parent) const {
if (!hasIndex(row, column, parent))
return QModelIndex();
if (!parent.isValid())
return createIndex(row, column, m_layout->rootPane);
// what's the parent..?
LYTPane *parentPane = (LYTPane*)parent.internalPointer();
LYTPane *pane = parentPane->children.at(row);
return createIndex(row, column, pane);
}
QModelIndex LSSceneModel::parent(const QModelIndex &child) const {
if (!child.isValid())
return QModelIndex();
LYTPane *childPane = (LYTPane*)child.internalPointer();
LYTPane *parentPane = childPane->parent;
if (parentPane) {
LYTPane *parentParentPane = parentPane->parent;
int index = parentParentPane ? parentParentPane->children.indexOf(parentPane) : 0;
return createIndex(index, 0, parentPane);
} else {
return QModelIndex();
}
}
int LSSceneModel::rowCount(const QModelIndex &parent) const {
if (!parent.isValid()) {
return 1; // the root pane
}
LYTPane *parentPane = (LYTPane*)parent.internalPointer();
return parentPane->children.count();
}
int LSSceneModel::columnCount(const QModelIndex &parent) const {
(void)parent;
return 1;
}
QVariant LSSceneModel::data(const QModelIndex &index, int role) const {
LYTPane *pane = (LYTPane*)index.internalPointer();
if (pane) {
switch (role) {
case Qt::DisplayRole:
return pane->name;
case Qt::DecorationRole:
return m_paneIcons[pane->type()];
}
}
return QVariant();
}
Qt::ItemFlags LSSceneModel::flags(const QModelIndex &index) const {
Qt::ItemFlags flag;
flag = Qt::ItemIsEnabled | Qt::ItemIsSelectable |
Qt::ItemIsDropEnabled | Qt::ItemIsEditable;
if (index.isValid() && index.parent().isValid())
flag |= Qt::ItemIsDragEnabled;
return flag;
}
Qt::DropActions LSSceneModel::supportedDropActions() const {
return Qt::MoveAction;
}
// I am doing a terrible, terrible, terrible thing here.
// I hate drag-and-drop.
// As far as I can see, insertRows and removeRows are ONLY called by Qt when
// dragging something. So instead of doing a real insertion/removal... I'll
// store the intended destination, and once I'm told what pane needs to be
// removed (moved) I do the whole thing at once.
bool LSSceneModel::insertRows(int row, int count, const QModelIndex &parent) {
qDebug("LSSceneModel::insertRows(%d, %d, something)", row, count);
if (m_movingPaneParent) {
qWarning("huh, already moving something? dunno");
return false;
}
if (!parent.isValid()) {
qWarning("can't move stuff to the top level");
return false;
}
m_movingPaneParent = new QPersistentModelIndex(parent);
m_movingPaneRow = row;
m_movingPaneCount = count;
return true;
}
bool LSSceneModel::removeRows(int row, int count, const QModelIndex &parent) {
qDebug("LSSceneModel::removeRows(%d, %d, something)", row, count);
if (!m_movingPaneParent) {
qWarning("huh, not moving anything / nothing left to move? dunno");
return false;
}
// detach all the existing panes
LYTPane *parentPane = (LYTPane*)parent.internalPointer();
QVector<LYTPane *> removingPanes;
removingPanes.reserve(count);
beginRemoveRows(parent, row, row + count - 1);
for (int i = 0; i < count; i++) {
removingPanes.append(parentPane->children.at(row));
parentPane->children.removeAt(row);
}
endRemoveRows();
// now add them in their new homes!
LYTPane *newParentPane = (LYTPane*)m_movingPaneParent->internalPointer();
// note: compensate for the offset: if we're moving the thing within the
// same parent and the destination row is higher than the source row, then
// removing the source row will have changed the index of the row the user
// actually wanted to move the moved row to... what a terrible sentence :|
if (*m_movingPaneParent == parent && m_movingPaneRow > row)
m_movingPaneRow -= count;
beginInsertRows(*m_movingPaneParent, m_movingPaneRow, m_movingPaneRow + count - 1);
for (int i = 0; i < count; i++) {
LYTPane *pane = removingPanes.at(i);
pane->parent = newParentPane;
newParentPane->children.insert(m_movingPaneRow, pane);
m_movingPaneRow++;
}
endInsertRows();
// clean up if needed
m_movingPaneCount -= count;
if (m_movingPaneCount <= 0) {
delete m_movingPaneParent;
m_movingPaneParent = 0;
}
return true;
}
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