1.相关说明
1.设置widget或view的拖拽和放置模式函数setDragDropMode参数说明,NoDragDrop(无拖拽和放置)、DragOnly(只允许拖拽)、DropOnly(只允许放置)、DragDrop(允许拖拽和放置)、InternalMove(只移动不复制)
2.设置widget或view的放置动作函数setDefaultDropAction参数说明,Qt::CopyAction(复制)、Qt::MoveAction(移动)、Qt::LinkAction(创建链接)、Qt::IgnoreAction(忽略,什么都不做)
2.相关界面
文章来源:https://www.toymoban.com/news/detail-813197.html
文章来源地址https://www.toymoban.com/news/detail-813197.html
3.相关代码
#include "widget.h"
#include "ui_widget.h"
#include <QKeyEvent>
Widget::Widget(QWidget *parent)
: QWidget(parent)
, ui(new Ui::Widget)
{
ui->setupUi(this);
ui->listSource->setAcceptDrops(true);
ui->listSource->setDragEnabled(true);
ui->listSource->setDefaultDropAction(Qt::CopyAction);
ui->listSource->setDragDropMode(QAbstractItemView::DragDrop);
ui->listWidget->setAcceptDrops(true);
ui->listWidget->setDragEnabled(true);
ui->listWidget->setDefaultDropAction(Qt::CopyAction);
ui->listWidget->setDragDropMode(QAbstractItemView::DragDrop);
ui->treeWidget->setAcceptDrops(true);
ui->treeWidget->setDragEnabled(true);
ui->treeWidget->setDefaultDropAction(Qt::CopyAction);
ui->treeWidget->setDragDropMode(QAbstractItemView::DragDrop);
ui->tableWidget->setAcceptDrops(true);
ui->tableWidget->setDragEnabled(true);
ui->tableWidget->setDefaultDropAction(Qt::MoveAction);
ui->tableWidget->setDragDropMode(QAbstractItemView::DragDrop);
m_itemView = ui->listSource;
refreshToUI(ui->groupBox_listSource);
ui->listSource->installEventFilter(this);
ui->listWidget->installEventFilter(this);
ui->treeWidget->installEventFilter(this);
ui->tableWidget->installEventFilter(this);
}
Widget::~Widget()
{
delete ui;
}
void Widget::refreshToUI(QGroupBox *curGroupBox)
{
ui->chkAcceptDrops->setChecked(m_itemView->acceptDrops());
ui->chkDragEnabled->setChecked(m_itemView->dragEnabled());
ui->comboDragDropMode->setCurrentIndex((int)m_itemView->dragDropMode());
int index = getDropActionIndex(m_itemView->defaultDropAction());
ui->comboDefaultDropAction->setCurrentIndex(index);
QFont font = ui->groupBox_listSource->font();
font.setBold(false);
ui->groupBox_listSource->setFont(font);
ui->groupBox_listWidget->setFont(font);
ui->groupBox_treeWidget->setFont(font);
ui->groupBox_tableWidget->setFont(font);
font.setBold(true);
curGroupBox->setFont(font);
}
int Widget::getDropActionIndex(Qt::DropAction actionType)
{
switch(actionType){
case Qt::CopyAction: return 0;
case Qt::MoveAction: return 1;
case Qt::LinkAction: return 2;
case Qt::IgnoreAction: return 3;
default: return 0;
}
}
Qt::DropAction Widget::getDropActionType(int index)
{
switch(index){
case 0: return Qt::CopyAction;
case 1: return Qt::MoveAction;
case 2: return Qt::LinkAction;
case 3: return Qt::IgnoreAction;
default: return Qt::CopyAction;
}
}
// 设置listWidget对象
void Widget::on_radioListWidget_clicked()
{
m_itemView = ui->listWidget;
this->refreshToUI(ui->groupBox_listWidget);
}
// 设置listSource对象
void Widget::on_radioListSource_clicked()
{
m_itemView = ui->listSource;
this->refreshToUI(ui->groupBox_listSource);
}
// 设置treeWidget对象
void Widget::on_radioTreeWidget_clicked()
{
m_itemView = ui->treeWidget;
this->refreshToUI(ui->groupBox_treeWidget);
}
// 设置tableWidget对象
void Widget::on_radioTableWidget_clicked()
{
m_itemView = ui->tableWidget;
this->refreshToUI(ui->groupBox_tableWidget);
}
// 设置 acceptDrops
void Widget::on_chkAcceptDrops_clicked(bool checked)
{
m_itemView->setAcceptDrops(checked);
}
// 设置 dragEnabled
void Widget::on_chkDragEnabled_clicked(bool checked)
{
m_itemView->setDragEnabled(checked);
}
// dragDropMode选择
void Widget::on_comboDragDropMode_currentIndexChanged(int index)
{
m_itemView->setDragDropMode((QAbstractItemView::DragDropMode)index);
}
// defaultDropAction
void Widget::on_comboDefaultDropAction_currentIndexChanged(int index)
{
m_itemView->setDefaultDropAction(getDropActionType(index));
}
// 事件捕获与过滤
bool Widget::eventFilter(QObject *watched, QEvent *event)
{
if(event->type() != QEvent::KeyPress){
return QWidget::eventFilter(watched, event);
}
QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
if(keyEvent->key() != Qt::Key_Delete){
return QWidget::eventFilter(watched, event);
}
if(watched == ui->listSource){
delete ui->listSource->takeItem(ui->listSource->currentRow());
}else if(watched == ui->listWidget){
delete ui->listWidget->takeItem(ui->listWidget->currentRow());
}else if(watched == ui->treeWidget){
QTreeWidgetItem *curItem = ui->treeWidget->currentItem();
if(curItem->parent() != NULL){
curItem->parent()->removeChild(curItem);
} else {
int index = ui->treeWidget->indexOfTopLevelItem(curItem);
ui->treeWidget->takeTopLevelItem(index);
}
delete curItem;
} else if(watched == ui->tableWidget){
delete ui->tableWidget->takeItem(ui->tableWidget->currentRow(), ui->tableWidget->currentColumn());
}
return true;
}
到了这里,关于Qt拖拽组件与键盘事件的文章就介绍完了。如果您还想了解更多内容,请在右上角搜索TOY模板网以前的文章或继续浏览下面的相关文章,希望大家以后多多支持TOY模板网!