简述功能
1.支持拉伸，拖拽；
2.双击控件支持编辑功能；
效果图
这里写图片描述
这里写图片描述
代码
//用法试列代码
CompontEditor* editlabel = new CompontEditor(ui.label, ui.label->text(), this);
CompontEditor* editbutton = new CompontEditor(ui.pushButton, ui.pushButton->text(), this);
//以下为核心代码
TextEditor::TextEditor(QWidget* parent)
: QWidget(parent)
, m_lineEdit(new QLineEdit(this))
{
installEventFilter(this);
m_lineEdit->setObjectName("q_texteditor");
m_lineEdit->setFrame(false);
m_lineEdit->setBackgroundRole(parent->backgroundRole());
setFocusProxy(m_lineEdit);
connect(m_lineEdit, &QLineEdit::editingFinished, this, &TextEditor::editingFinished);
connect(m_lineEdit, &QLineEdit::returnPressed, this, &TextEditor::slotEditingFinished);
connect(m_lineEdit, &QLineEdit::textChanged, this, &TextEditor::slotTextChanged);
}
TextEditor::~TextEditor()
{
}
void TextEditor::slotTextChanged(const QString &text)
{
m_cachedText = text;
}
void TextEditor::slotEditingFinished()
{
emit textChanged(m_cachedText);
}
QString TextEditor::text() const{
return m_cachedText;
}
void TextEditor::setText(const QString &text){
m_cachedText = text;
m_lineEdit->setText(text);
}
void TextEditor::setAlignment(Qt::Alignment align)
{
m_lineEdit->setAlignment(align);
}
void TextEditor::selectAll() {
m_lineEdit->selectAll();
}
void TextEditor::clear() {
m_lineEdit->clear();
}
void TextEditor::resizeEvent(QResizeEvent * event) {
m_lineEdit->resize(event->size());
}
QSize TextEditor::sizeHint() const {
return m_lineEdit->sizeHint();
}
QSize TextEditor::minimumSizeHint() const {
return m_lineEdit->minimumSizeHint();
}
void TextEditor::installEventFilter(QObject *filterObject)
{
if (m_lineEdit)
m_lineEdit->installEventFilter(filterObject);
}
CompontEditor::CompontEditor(QWidget *widget, const QString& text, QWidget* parent)
: TextEditor(parent)
, m_widget(widget)
, m_leftButtonPress(false)
, m_type(Type::NORMAL)
{
qApp->installEventFilter(this);
setText(text);
selectAll();
setAlignment(alignment());
QRect r = editRectangle();
setGeometry(QRect(widget->mapTo(widget->window(), r.topLeft()), r.size()));
this->hide();
connect(this, &TextEditor::editingFinished, [this](){
this->hide();
m_widget->setProperty("text", this->text());
});
}
Qt::Alignment CompontEditor::alignment() const {
if (m_widget->metaObject()->indexOfProperty("alignment") != -1)
return Qt::Alignment(m_widget->property("alignment").toInt());
if (qobject_cast(m_widget) || qobject_cast(m_widget))
return Qt::AlignHCenter;
return Qt::AlignJustify;
}
CompontEditor::~CompontEditor(){
}
QRect CompontEditor::editRectangle() const
{
QStyleOptionButton opt;
opt.init(m_widget);
if (m_widget->inherits("QPushButton")){
return m_widget->style()->subElementRect(QStyle::SE_PushButtonContents, &opt, m_widget);
}
else if (m_widget->inherits("QRadioButton")){
return m_widget->style()->subElementRect(QStyle::SE_RadioButtonContents, &opt, m_widget);
}
else if (m_widget->inherits("QCheckBox")){
return m_widget->style()->subElementRect(QStyle::SE_CheckBoxContents, &opt, m_widget);
}
else{
return opt.rect;
}
}
bool CompontEditor::eventFilter(QObject *watched, QEvent *event)
{
if (event->type() == QEvent::MouseButtonDblClick){
if (watched == m_widget){
this->selectAll();
this->setFocus();
this->show();
}
}
else if (event->type() == QEvent::MouseButtonPress){
QMouseEvent* mouse = dynamic_cast(event);
if (watched == m_widget){
if (mouse->button() == Qt::LeftButton){
m_leftButtonPress = true;
}
m_mousepressPos = mouse->globalPos();
}
else{
QRect rect(this->mapToGlobal(QPoint(0, 0)), this->size());
if (this->isVisible() && !rect.contains(mouse->globalPos())){
emit editingFinished();
}
}
}
else if (event->type() == QEvent::MouseMove){
QMouseEvent* mouse = dynamic_cast(event);
if (watched == m_widget){
m_mousemovePos = mouse->globalPos();
if (m_leftButtonPress && m_type == NORMAL){
QPoint movepoint = mouse->globalPos() - m_mousepressPos;
m_mousepressPos = mouse->globalPos();
m_widget->move(m_widget->pos() + movepoint);
}
else if (m_leftButtonPress && m_type != NORMAL){
resizeSection();
}
else{
updateCursorType();
}
}
}
else if (event->type() == QEvent::MouseButtonRelease){
QMouseEvent* mouse = dynamic_cast(event);
if (watched == m_widget){
m_mousepressPos = mouse->globalPos();
m_leftButtonPress = false;
}
}
else if (event->type() == QEvent::Resize) {
if (watched == m_widget){
const QResizeEvent *resizeevent = static_cast(event);
}
}
else if (event->type() == QEvent::Show) {
if (watched == this){
QRect r = editRectangle();
setGeometry(QRect(m_widget->mapTo(m_widget->window(), r.topLeft()), r.size()));
}
}
return QWidget::eventFilter(watched, event);
}
void CompontEditor::updateCursor()
{
switch (m_type) {
case LeftTop:
m_widget->setCursor(Qt::SizeFDiagCursor);
break;
case Top:
m_widget->setCursor(Qt::SizeVerCursor);
break;
case RightTop:
m_widget->setCursor(Qt::SizeBDiagCursor);
break;
case Right:
m_widget->setCursor(Qt::SizeHorCursor);
break;
case RightBottom:
m_widget->setCursor(Qt::SizeFDiagCursor);
break;
case Bottom:
m_widget->setCursor(Qt::SizeVerCursor);
break;
case LeftBottom:
m_widget->setCursor(Qt::SizeBDiagCursor);
break;
case Left:
m_widget->setCursor(Qt::SizeHorCursor);
break;
default:
m_widget->setCursor(Qt::ArrowCursor);
break;
}
}
void CompontEditor::resizeSection()
{
QPoint widgetGloabPoint(m_widget->mapToGlobal(QPoint(0, 0)));
QPoint widgetpoint = m_widget->mapToParent(m_widget->mapFromGlobal(m_mousemovePos));
switch (m_type) {
case LeftTop:{
int resizeH = widgetGloabPoint.y() - m_mousemovePos.y() + m_widget->height();
int resizeW = widgetGloabPoint.x() - m_mousemovePos.x() + m_widget->width();
if (m_widget->minimumHeight() <= resizeH && resizeH <= m_widget->maximumHeight()){
m_widget->setGeometry(m_widget->x(), widgetpoint.y(), resizeW, resizeH);
}
if (m_widget->minimumWidth() <= resizeW && resizeW <= m_widget->maximumWidth()){
m_widget->setGeometry(widgetpoint.x(), m_widget->y(), resizeW, resizeH);
}
}
break;
case Top:{
int resizeH = widgetGloabPoint.y() - m_mousemovePos.y() + m_widget->height();
if (m_widget->minimumHeight() <= resizeH && resizeH <= m_widget->maximumHeight()){
m_widget->setGeometry(m_widget->x(), widgetpoint.y(), m_widget->width(), resizeH);
}
}
break;
case RightTop:{
int resizeH = widgetGloabPoint.y() + m_widget->height() - m_mousemovePos.y();
int resizeW = m_mousemovePos.x() - widgetGloabPoint.x();
int pointY = widgetpoint.y();
if (m_widget->minimumHeight() <= resizeH && resizeH <= m_widget->maximumHeight()){
m_widget->setGeometry(m_widget->x(), widgetpoint.y(), resizeW, resizeH);
}
}
break;
case Right:{
int resizeW = m_mousemovePos.x() - widgetGloabPoint.x();
m_widget->setGeometry(m_widget->x(), m_widget->y() , resizeW, m_widget->height());
}
break;
case RightBottom:{
int resizeW = m_mousemovePos.x() - widgetGloabPoint.x();
int resizeH = m_mousemovePos.y() - widgetGloabPoint.y();
m_widget->setGeometry(m_widget->x(), m_widget->y(), resizeW, resizeH);
}
break;
case Bottom:{
int resizeH = m_mousemovePos.y() - widgetGloabPoint.y();
m_widget->setGeometry(m_widget->x(), m_widget->y(), m_widget->width(), resizeH);
}
break;
case LeftBottom:{
int resizeH = m_mousemovePos.y() - widgetGloabPoint.y();
int resizeW = widgetGloabPoint.x() - m_mousemovePos.x() + m_widget->width();
if (m_widget->minimumWidth() <= resizeW && resizeW <= m_widget->maximumWidth()){
m_widget->setGeometry(widgetpoint.x(), m_widget->y(), resizeW, resizeH);
}
if (m_widget->minimumHeight() <= resizeH && resizeH <= m_widget->maximumHeight()){
m_widget->setGeometry(m_widget->x(), m_widget->y(), resizeW, resizeH);
}
}
break;
case Left:{
int resizeW = widgetGloabPoint.x() - m_mousemovePos.x() + m_widget->width();
if (m_widget->minimumWidth() <= resizeW && resizeW <= m_widget->maximumWidth()){
m_widget->setGeometry(widgetpoint.x(), m_widget->y(), resizeW, m_widget->height());
}
}
break;
default:{
}
break;
}
}
void CompontEditor::updateCursorType()
{
QRect widgetGloabRect(m_widget->mapToGlobal(QPoint(0, 0)), m_widget->size());
if (QRect(widgetGloabRect.bottomLeft() - QPoint(DISTANCE / 2, DISTANCE / 2), widgetGloabRect.bottomLeft() + QPoint(DISTANCE / 2, DISTANCE / 2)).contains(m_mousemovePos)){
m_type = LeftBottom;
}
else if (QRect(widgetGloabRect.bottomRight() - QPoint(DISTANCE / 2, DISTANCE / 2), widgetGloabRect.bottomRight() + QPoint(DISTANCE / 2, DISTANCE / 2)).contains(m_mousemovePos)){
m_type = RightBottom;
}
else if (QRect(widgetGloabRect.topRight() - QPoint(DISTANCE / 2, DISTANCE / 2), widgetGloabRect.topRight() + QPoint(DISTANCE / 2, DISTANCE / 2)).contains(m_mousemovePos)){
m_type = RightTop;
}
else if (QRect(widgetGloabRect.topLeft() - QPoint(DISTANCE / 2, DISTANCE / 2), widgetGloabRect.topLeft() + QPoint(DISTANCE / 2, DISTANCE / 2)).contains(m_mousemovePos)){
m_type = LeftTop;
}
else if (qAbs(m_mousemovePos.x() - widgetGloabRect.left()) < DISTANCE){
m_type = Left;
}
else if (qAbs(m_mousemovePos.y() - widgetGloabRect.bottom()) < DISTANCE){
m_type = Bottom;
}
else if (qAbs(m_mousemovePos.x() - widgetGloabRect.right()) < DISTANCE){
m_type = Right;
}
else if (qAbs(m_mousemovePos.y() - widgetGloabRect.top()) < DISTANCE){
m_type = Top;
}
else{
m_type = NORMAL;
}
updateCursor();
}
工程文件
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在这里插入图片描述
结尾
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