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//===========================================
// Lumina-DE source code
// Copyright (c) 2015, Ken Moore
// Available under the 3-clause BSD license
// See the LICENSE file for full details
//===========================================
// This is a couple simple widget subclasses to enable drag and drop functionality
// NOTE: The "whatsThis()" item information needs to correspond to the "[cut/copy]::::<file path>" syntax
//NOTE2: The "whatsThis()" information on the widget itself should be the current dir path *if* it can accept drops
//===========================================
#ifndef _LUMINA_FM_DRAG_DROP_WIDGETS_H
#define _LUMINA_FM_DRAG_DROP_WIDGETS_H
#define MIME QString("x-special/lumina-copied-files")
#include <QListWidget>
#include <QTreeWidget>
#include <QDropEvent>
#include <QMimeData>
#include <QDrag>
#include <QFileInfo>
#include <QDebug>
#include <QMouseEvent>
//==============
// LIST WIDGET
//==============
class DDListWidget : public QListWidget{
Q_OBJECT
public:
DDListWidget(QWidget *parent=0) : QListWidget(parent){
//Drag and Drop Properties
this->setDragDropMode(QAbstractItemView::DragDrop);
this->setDefaultDropAction(Qt::MoveAction); //prevent any built-in Qt actions - the class handles it
//Other custom properties necessary for the FM
this->setFocusPolicy(Qt::StrongFocus);
this->setContextMenuPolicy(Qt::CustomContextMenu);
this->setSelectionMode(QAbstractItemView::ExtendedSelection);
this->setSelectionBehavior(QAbstractItemView::SelectRows);
this->setFlow(QListView::TopToBottom);
this->setWrapping(true);
this->setMouseTracking(true);
//this->setSortingEnabled(true); //This sorts *only* by name - type is not preserved
}
~DDListWidget(){}
signals:
void DataDropped(QString, QStringList); //Dir path, List of commands
protected:
void startDrag(Qt::DropActions act){
QList<QListWidgetItem*> items = this->selectedItems();
if(items.length()<1){ return; }
QStringList info;
for(int i=0; i<items.length(); i++){ info << items[i]->whatsThis(); }
//Create the mime data
QMimeData *mime = new QMimeData;
mime->setData(MIME,info.join("\n").toLocal8Bit());
//Create the drag structure
QDrag *drag = new QDrag(this);
drag->setMimeData(mime);
drag->exec(act | Qt::MoveAction | Qt::CopyAction);
}
void dragEnterEvent(QDragEnterEvent *ev){
//qDebug() << "Drag Enter Event:" << ev->mimeData()->hasFormat(MIME);
if(ev->mimeData()->hasFormat(MIME) && !this->whatsThis().isEmpty() ){
//qDebug() << "Accepted:" << ev->mimeData()->data(MIME);
if(QString(ev->mimeData()->data(MIME)).section("::::",0,0)=="cut"){
ev->setDropAction(Qt::MoveAction);
}else{
ev->setDropAction(Qt::CopyAction);
}
ev->accept(); //allow this to be dropped here
}
}
void dragMoveEvent(QDragMoveEvent *ev){
//qDebug() << "Drag Move Event:" << ev->mimeData()->hasFormat(MIME);
if(ev->mimeData()->hasFormat(MIME) && !this->whatsThis().isEmpty()){
//qDebug() << "Accepted:" << ev->mimeData()->data(MIME);
if(QString(ev->mimeData()->data(MIME)).section("::::",0,0)=="cut"){
ev->setDropAction(Qt::MoveAction);
}else{
ev->setDropAction(Qt::CopyAction);
}
ev->accept(); //allow this to be dropped here
}else{
ev->ignore();
}
}
void dropEvent(QDropEvent *ev){
if(this->whatsThis().isEmpty()){ ev->ignore(); return; } //not supported
//qDebug() << "Drop Event:";
ev->accept(); //handled here
QString dirpath = this->whatsThis();
//See if the item under the drop point is a directory or not
QListWidgetItem *it = this->itemAt( ev->pos());
if(it!=0){
QFileInfo info(it->whatsThis().section("::::",1,100));
if(info.isDir() && info.isWritable()){
dirpath = info.absoluteFilePath();
}
}
//qDebug() << "Drop Event:" << dirpath;
emit DataDropped( dirpath, QString(ev->mimeData()->data(MIME)).split("\n") );
}
void mouseReleaseEvent(QMouseEvent *ev){
if(ev->button() != Qt::RightButton && ev->button() != Qt::LeftButton){ ev->ignore(); }
else{ QListWidget::mouseReleaseEvent(ev); } //pass it along to the widget
}
void mousePressEvent(QMouseEvent *ev){
if(ev->button() != Qt::RightButton && ev->button() != Qt::LeftButton){ ev->ignore(); }
else{ QListWidget::mousePressEvent(ev); } //pass it along to the widget
}
/*void mouseMoveEvent(QMouseEvent *ev){
if(ev->button() != Qt::RightButton && ev->button() != Qt::LeftButton){ ev->ignore(); }
else{ QListWidget::mouseMoveEvent(ev); } //pass it along to the widget
}*/
};
//================
// TreeWidget
//================
class DDTreeWidget : public QTreeWidget{
Q_OBJECT
public:
DDTreeWidget(QWidget *parent=0) : QTreeWidget(parent){
//Drag and Drop Properties
this->setDragDropMode(QAbstractItemView::DragDrop);
this->setDefaultDropAction(Qt::MoveAction); //prevent any built-in Qt actions - the class handles it
//Other custom properties necessary for the FM
this->setFocusPolicy(Qt::StrongFocus);
this->setContextMenuPolicy(Qt::CustomContextMenu);
this->setSelectionMode(QAbstractItemView::ExtendedSelection);
this->setSelectionBehavior(QAbstractItemView::SelectRows);
this->setMouseTracking(true);
this->setSortingEnabled(true);
this->setIndentation(0);
this->setItemsExpandable(false);
}
~DDTreeWidget(){}
signals:
void DataDropped(QString, QStringList); //Dir path, List of commands
protected:
void startDrag(Qt::DropActions act){
QList<QTreeWidgetItem*> items = this->selectedItems();
if(items.length()<1){ return; }
QStringList info;
for(int i=0; i<items.length(); i++){ info << items[i]->whatsThis(0); }
//Create the mime data
QMimeData *mime = new QMimeData;
mime->setData(MIME,info.join("\n").toLocal8Bit());
//Create the drag structure
QDrag *drag = new QDrag(this);
drag->setMimeData(mime);
drag->exec(act | Qt::MoveAction | Qt::CopyAction);
}
void dragEnterEvent(QDragEnterEvent *ev){
//qDebug() << "Drag Enter Event:" << ev->mimeData()->hasFormat(MIME);
if(ev->mimeData()->hasFormat(MIME) && !this->whatsThis().isEmpty() ){
//qDebug() << "Accepted:" << ev->mimeData()->data(MIME);
if(QString(ev->mimeData()->data(MIME)).section("::::",0,0)=="cut"){
ev->setDropAction(Qt::MoveAction);
}else{
ev->setDropAction(Qt::CopyAction);
}
ev->accept(); //allow this to be dropped here
}
}
void dragMoveEvent(QDragMoveEvent *ev){
//qDebug() << "Drag Move Event:" << ev->mimeData()->hasFormat(MIME);
if(ev->mimeData()->hasFormat(MIME) && !this->whatsThis().isEmpty()){
//qDebug() << "Accepted:" << ev->mimeData()->data(MIME);
if(QString(ev->mimeData()->data(MIME)).section("::::",0,0)=="cut"){
ev->setDropAction(Qt::MoveAction);
}else{
ev->setDropAction(Qt::CopyAction);
}
ev->accept(); //allow this to be dropped here
}
}
void dropEvent(QDropEvent *ev){
if(this->whatsThis().isEmpty()){ return; } //not supported
ev->accept(); //handled here
QString dirpath = this->whatsThis();
//See if the item under the drop point is a directory or not
QTreeWidgetItem *it = this->itemAt( ev->pos());
if(it!=0){
QFileInfo info(it->whatsThis(0).section("::::",1,100));
if(info.isDir() && info.isWritable()){
dirpath = info.absoluteFilePath();
}
}
//qDebug() << "Drop Event:" << dirpath;
emit DataDropped( dirpath, QString(ev->mimeData()->data(MIME)).split("\n") );
}
void mouseReleaseEvent(QMouseEvent *ev){
if(ev->button() != Qt::RightButton && ev->button() != Qt::LeftButton){ ev->ignore(); }
else{ QTreeWidget::mouseReleaseEvent(ev); } //pass it along to the widget
}
void mousePressEvent(QMouseEvent *ev){
if(ev->button() != Qt::RightButton && ev->button() != Qt::LeftButton){ ev->ignore(); }
else{ QTreeWidget::mousePressEvent(ev); } //pass it along to the widget
}
/*void mouseMoveEvent(QMouseEvent *ev){
if(ev->button() != Qt::RightButton && ev->button() != Qt::LeftButton){ ev->ignore(); }
else{ QTreeWidget::mouseMoveEvent(ev); } //pass it along to the widget
}*/
};
#endif
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