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simple

QtPropertyBrowser提供了丰富的示例来展示该扩展是如何使用的。

示例simple展示如下：

其中包括int、bool、string等普通数据类型，file文件类型，group族类型等。如果要重绘某种类型的控件如何办呢？

特殊需求

比如在group中来增加两个按钮，实现组内成员的增减，效果如下：

点击“+”，组内增加指定类型的成员，点击“-”，组内删除选中的成员。

问题

需要解决以下问题：

1. 把按钮加进去
2. 给多组“+”/"-"按钮绑定信号槽
3. 改变group组的显示风格，例如：按钮正常状态下也要显示/不设置焦点捕获等
4. 兼容int/double/bool/file等众多类型，模板化

方法

选用simple示例中展示的size类型来进行重写，当然你可以选择你感兴趣的任何类型。

QtVectorPropertyManager的实现

继承QtVariantPropertyManager，实现以下接口：

QString valueText(const QtProperty *property) const;	virtual void initializeProperty(QtProperty *property);	virtual void uninitializeProperty(QtProperty *property);	QtProperty *addProperty(const QString &name);

QtVectorEditoryFactory的实现

继承QtAbstractEditorFactory，实现以下接口：

void connectPropertyManager(QtArrayPropertyManager *manager);	QWidget *createEditor(QtArrayPropertyManager *manager, QtProperty *property,		QWidget *parent); //关于按钮的，主要在createEditor这个函数里实现。	void disconnectPropertyManager(QtArrayPropertyManager *manager);	void pushGroupItem(QtProperty *property);	void delGroupItem(QtProperty* property);	void btnSignalsSlots();

qtvectorypropertymanager.h

QtVectorPropertyManager.h

class  QtVectorPropertyManager: public QtVariantPropertyManager{
   	Q_OBJECTpublic:	explicit QtVectorPropertyManager(QWidget *parent = 0);	virtual ~QtVectorPropertyManager();public:	// must a name to identity different group	QtProperty *addProperty(const QString &name);//	void setValue(const QString &value);	void setTreeBrowser(QtAbstractPropertyBrowser* browser);	QtAbstractPropertyBrowser* getTreeBrowser();protected:	QString displayText(const QtProperty *property) const;	QString valueText(const QtProperty *property) const;	virtual void initializeProperty(QtProperty *property);	virtual void uninitializeProperty(QtProperty *property);private:	QMap
   
     _propertyToGroup;	// 用于动态绑定	QtAbstractPropertyBrowser *_browser;};
   

qtvectorypropertymanager.cpp

QtVectoryPropertyManager.cpp

QtVectoryPropertyManager::QtVectoryPropertyManager(QWidget *parent) :	QtVectoryPropertyManager(parent){
   }QtVectoryPropertyManager::~QtVectoryPropertyManager(){
   }// must a name to identity different groupQtProperty* QtVectoryPropertyManager::addProperty(const QString &name){
   	// add a top item	QtProperty* topItem = QtVariantPropertyManager::addProperty(QVariant::Size, name);	_propertyToGroup[topItem] = name;	topItem->setGroupBox(true);	return topItem;}//void QtVectoryPropertyManager::setValue(const QString &value){
   	return;}void QtVectoryPropertyManager::setTreeBrowser(QtAbstractPropertyBrowser* browser){
   	_browser = browser;}QtVectoryPropertyManager* QtArrayPropertyManager::getTreeBrowser(){
   	return _browser;}QString QtVectoryPropertyManager::displayText(const QtProperty *property) const{
   	return "";}QString QtVectoryPropertyManager::valueText(const QtProperty *property) const{
   	// nothing return;	//QString text = QtVariantPropertyManager::valueText(property);	//if (!_propertyToGroup.contains(property))	//	return text;	//QString data = _propertyToGroup[property];	return "";}void QtVectoryPropertyManager::initializeProperty(QtProperty *property){
   	return;}void QtVectoryPropertyManager::uninitializeProperty(QtProperty *property){
   	QtVariantPropertyManager::uninitializeProperty(property);}

qtvectoreditorfactory.h

使用模板，确保多类型的兼容。由于用了模板，类的实现也必须在头文件里完成。

template 
   
    class  QtVectorEditorFactory : public QtAbstractEditorFactory
    
     {
   public:	explicit QtVectorEditorFactory(QObject *parent = 0);	virtual ~QtVectorEditorFactory();	PropertyManager* subManager();	EditorFactory* subFactory();protected:	void connectPropertyManager(QtVectoryPropertyManager*manager);	QWidget *createEditor(QtVectoryPropertyManager*manager, QtProperty *property,		QWidget *parent);	void disconnectPropertyManager(QtVectoryPropertyManager *manager);	void pushGroupItem(QtProperty *property);	void delGroupItem(QtProperty* property);	void btnSignalsSlots();	private:	struct UserEditor {
   		QPushButton* btnAdd = nullptr;		QPushButton* btnRemove = nullptr;		bool isConnected = false;	};	QtVariantEditorFactory *_originalFactory = nullptr;	PropertyManager* _manager = nullptr;	EditorFactory *_factory = nullptr;	QMap
     
       _porpertyToEditor;	//different group,different index.	// auto add index.	QMap
      
        _propertyIndex;	};template 
       
        QtVectorEditorFactory< PropertyManager, EditorFactory >::QtArrayEditorFactory(QObject *parent)	: QtAbstractEditorFactory
        
         (parent){ _originalFactory = new QtVariantEditorFactory(this); _manager = new PropertyManager(this); _factory = new EditorFactory(this);}template 
         
          QtVectorEditorFactory< PropertyManager, EditorFactory >::~QtArrayEditorFactory(){ // not need to delete editor widgets, because they will be deleted by originalFactory in its destructor}template 
          
           PropertyManager* QtVectorEditorFactory< PropertyManager, EditorFactory >::subManager(){ return _manager;}template 
           
            EditorFactory* QtVectorEditorFactory< PropertyManager, EditorFactory >::subFactory(){ return _factory;}template 
            
             void QtVectorEditorFactory< PropertyManager, EditorFactory >::connectPropertyManager(QtVectoryPropertyManager *manager){ _originalFactory->addPropertyManager(manager); // set factory for tpl. manager->getTreeBrowser()->setFactoryForManager(_manager, _factory);}template 
             
              void QtVectorEditorFactory< PropertyManager, EditorFactory >::prepareSignalsSlots(){ QMap
              
               ::Iterator it = _porpertyToEditor.begin(); while (it != _porpertyToEditor.end()) { QtProperty* prop = it.key(); UserEditor ueditor = it.value(); if (!ueditor.isConnected) { // add button click singal and slot; connect(ueditor.btnAdd, &QPushButton::clicked, this, [=] { _propertyIndex[prop]++; this->pushBackGroupItem(prop); }); // del button clicked singal and slot; connect(ueditor.btnRemove, &QPushButton::clicked, this, [=] { this->removeGroupItem(prop); }); ueditor.isConnected = true; _porpertyToEditor[prop] = ueditor; } it++; }}template 
               
                QWidget *QtVectorEditorFactory< PropertyManager, EditorFactory >::createEditor(QtVectoryPropertyManager*manager, QtProperty *property, QWidget *parent){ // 这里指定了widget的parent，无需delete ... ???? QWidget* groupEditor = new QWidget(); QPushButton* btnAdd = new QPushButton(groupEditor); QPushButton* btnRemove = new QPushButton(groupEditor); UserEditor editor{ btnAdd,btnRemove,false }; _porpertyToEditor[property] = editor; groupEditor->setParent(parent); groupEditor->setToolTip("manager your properties here"); QSpacerItem* spacer = new QSpacerItem(0, 0, QSizePolicy::Expanding, QSizePolicy::Minimum); QHBoxLayout *layout = new QHBoxLayout(groupEditor); groupEditor->setAttribute(Qt::WA_StyledBackground, true); groupEditor->setLayout(layout); layout->addItem(spacer); layout->setContentsMargins(0, 0, 0, 0); btnAdd->setFixedWidth(24); btnAdd->setToolTip("add"); btnRemove->setFixedWidth(24); btnRemove->setToolTip("remove"); btnAdd->setIcon(QIcon(":/res/add.svg")); btnRemove->setIcon(QIcon(":/res/remove.svg")); layout->addWidget(btnAdd); layout->addWidget(btnRemove); // bind signals and slots. // prepare signals and slots. btnSignalsSlots(); return groupEditor;}template 
                
                 void QtVectorEditorFactory< PropertyManager, EditorFactory >::disconnectPropertyManager(QtVectoryPropertyManager*manager){ _originalFactory->removePropertyManager(manager); _originalFactory->addPropertyManager(manager);}template 
                 
                  void QtVectorEditorFactory< PropertyManager, EditorFactory >::pushGroupItem(QtProperty *property){ QtArrayPropertyManager *manager = propertyManager(property); if (!manager) return; QtProperty* itemTop = property; QList
                  
                    properies = itemTop->subProperties(); QtProperty* item = _manager->addProperty(QString::number(_propertyIndex[property])); properies.append(item); itemTop->addSubProperty(item);}template 
                   
                    void QtVectorEditorFactory< PropertyManager, EditorFactory >::delGroupItem(QtProperty* property){ QtVectoryPropertyManager*manager = propertyManager(property); if (!manager) return; QtProperty* itemTop = property; QList
                    
                      subProperties = itemTop->subProperties(); QtBrowserItem * curItem = manager->getTreeBrowser()->currentItem(); // select nothing. if (curItem == nullptr) return; QtProperty* curSelProperty = curItem->property(); // select top item. if (curSelProperty == itemTop) return; // remove selected from subproperties; for (int i = 0; i < subProperties.size(); i++) { if (subProperties.contains(curSelProperty)) { int ret = QMessageBox::warning(NULL, "warning", "Are you sure to remove?", QMessageBox::Yes | QMessageBox::No, QMessageBox::Yes); if (ret == QMessageBox::Yes) { //... // remove from list. itemTop->removeSubProperty(curSelProperty); return; } return; } }}
                    
                   
                  
                 
                
               
              
             
            
           
          
         
        
       
      
     
    
   

使用方法，以文件的类型为例：

// 创建一个array	_arrayManager = new QtVectorPropertyManager(this);		_arrayFactory = new QtVectorEditorFactory
   
    (this);	_arrayManager->setTreeBrowser(_brower);	_brower->setFactoryForManager(_arrayManager, _arrayFactory);	connect(_arrayFactory->subManager(), &QtFilePathPropertyManager::valueChanged, _arrayFactory->subFactory(),		[=](QtProperty *subprop, const QString& val){
   		// do something ...			});
   

改变group组的显示风格

例如：按钮正常状态下也要显示/不设置焦点捕获等

这个group组，正常状态下是需要显示“+”，“-”的，并不是每次点击属性都需要运行createEditor这个函数。这里就需要改qtpropertybrowser的源码了。

修改文件qttreepropertybrowser.cpp 函数propertyInserted

void QtTreePropertyBrowserPrivate::propertyInserted(QtBrowserItem *index, QtBrowserItem *afterIndex){
       QTreeWidgetItem *afterItem = m_indexToItem.value(afterIndex);    QTreeWidgetItem *parentItem = m_indexToItem.value(index->parent());    QTreeWidgetItem *newItem = 0;    if (parentItem) {
           newItem = new QTreeWidgetItem(parentItem, afterItem);    } else {
           newItem = new QTreeWidgetItem(m_treeWidget, afterItem);    }    m_itemToIndex[newItem] = index;    m_indexToItem[index] = newItem;    newItem->setFlags(newItem->flags() | Qt::ItemIsEditable);	if ( index->property()->isGroupBox() ) // index->property()->isGroupBox() 是个属性控制，区分正常显示与组框显示的风格。自己添加。。。	{
   		QWidget* editor = createEditor(index->property(), m_treeWidget);		editor->setFocusPolicy(Qt::NoFocus);		m_treeWidget->setItemWidget(newItem, 1, editor);	}    m_treeWidget->setItemExpanded(newItem, true);    updateItem(newItem);}

至此，基本功能大概完成。很草率，写的代码自己都看不下去，只是提供个思路而已，抛转引玉…哎…

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