299 lines
10 KiB
C++
299 lines
10 KiB
C++
#include "ExQTreeWidget.h"
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#include "ui_ExQTreeWidget.h"
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ExQTreeWidget::ExQTreeWidget(QWidget *parent) :
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QMainWindow(parent),
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ui(new Ui::ExQTreeWidget)
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{
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ui->setupUi(this);
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setWindowTitle(QObject::tr("QTreeWidget和QDockWidget的讲解和使用"));
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setCentralWidget(ui->scrollArea); //设置scrollArea为中心控件
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initTree();
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m_labFlie = new QLabel("当前文件的路径:", this);
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ui->statusBar->addWidget(m_labFlie);
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}
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ExQTreeWidget::~ExQTreeWidget()
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{
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delete ui;
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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//初始化根节点（只能够有唯一）
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void ExQTreeWidget::initTree()
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{
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//准备工作
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ui->treeFiles->clear();
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QString dataStr = "";
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QIcon icon;
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icon.addFile(":/image/Image001.jpg");
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//创建唯一root的节点
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QTreeWidgetItem* root = new QTreeWidgetItem(treeItemType::itemRoot);
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root->setIcon(treeColNum::colItem, icon);
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root->setText(treeColNum::colItem, QString("相簿"));
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root->setText(treeColNum::colItemType, QString("treeItemType"));
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root->setFlags(Qt::ItemIsSelectable | Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsAutoTristate);
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root->setCheckState(treeColNum::colItem, Qt::Unchecked);
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root->setData(treeColNum::colItem, Qt::UserRole, QVariant(dataStr));
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//添加顶层节点
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ui->treeFiles->addTopLevelItem(root);
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}
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//添加目录节点
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void ExQTreeWidget::addFolderItem(QTreeWidgetItem *parItem, QString dirName)
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{
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QIcon icon;
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icon.addFile(":/image/Image006.jpg");
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//添加一个新的节点
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QTreeWidgetItem* item = new QTreeWidgetItem(treeItemType::itemFile);
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QString folderName = getFinalFolderName(dirName);
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item->setIcon(treeColNum::colItem, icon);
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item->setText(treeColNum::colItem, folderName);
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item->setText(treeColNum::colItemType, QString("treeItemType"));
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item->setFlags(Qt::ItemIsSelectable | Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsAutoTristate);
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item->setCheckState(treeColNum::colItem, Qt::Unchecked);
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item->setData(treeColNum::colItem, Qt::UserRole, QVariant(dirName));
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//添加子节点
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if (parItem->type() == treeItemType::itemFile) { //若是文件节点
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parItem->addChild(item);
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} else if (parItem->type() == treeItemType::itemRoot) { //若是唯一root节点
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QTreeWidgetItem *root = ui->treeFiles->topLevelItem(0);
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root->addChild(item);
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}
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}
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//添加图片节点
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void ExQTreeWidget::addImageItem(QTreeWidgetItem *parItem, QString fileName)
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{
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if (parItem == nullptr)
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return;
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QIcon icon;
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icon.addFile(":/image/Image014.jpg");
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//添加一个新的节点
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QTreeWidgetItem* item = new QTreeWidgetItem(treeItemType::itemImage);
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QString folderName = getFinalFolderName(fileName);
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item->setIcon(treeColNum::colItem, icon);
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item->setText(treeColNum::colItem, folderName);
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item->setText(treeColNum::colItemType, QString("treeItemType"));
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item->setFlags(Qt::ItemIsSelectable | Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsAutoTristate);
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item->setCheckState(treeColNum::colItem, Qt::Unchecked);
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item->setData(treeColNum::colItem, Qt::UserRole, QVariant(fileName));
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//添加子节点
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if (parItem->type() == treeItemType::itemFile) { //若是文件节点
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parItem->addChild(item);
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} else if (parItem->type() == treeItemType::itemRoot) { //若是唯一root节点
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QTreeWidgetItem *root = ui->treeFiles->topLevelItem(0);
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root->addChild(item);
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}
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}
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//从完整的路径里面，获取最后的文件夹名称
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QString ExQTreeWidget::getFinalFolderName(const QString &pathName)
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{
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QString path = pathName;
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int cnt = pathName.count();
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int i = pathName.lastIndexOf("/");
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QString str = pathName.right(cnt - i - 1);
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return str;
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}
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//遍历传进来的父节点下的所有子节点；每遍历过该节点，就在其节点的信息加一个#
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void ExQTreeWidget::changeItemCaption(QTreeWidgetItem *parItem)
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{
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QString str = "# " + parItem->text(treeColNum::colItem);
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parItem->setText(treeColNum::colItem, str);
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if (parItem->childCount() < 0)
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return;
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for (int i = 0; i < parItem->childCount(); i++) {
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changeItemCaption(parItem->child(i)); //回调，调用自己
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}
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}
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//显示当前item的图片（默认以适配高度）
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void ExQTreeWidget::displayImage(QTreeWidgetItem *item)
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{
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QString fileName = item->data(treeColNum::colItem, Qt::UserRole).toString();
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m_labFlie->setText(fileName);
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m_curPixmap.load(fileName); //从文件载入图片
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on_actAdaptiveHeight_triggered(); //自动适应高度显示
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ui->actAmplification->setEnabled(true);
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ui->actShrink->setEnabled(true);
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ui->actZoomRealSize->setEnabled(true);
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ui->actAdaptiveHeight->setEnabled(true);
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ui->actAdaptiveWidth->setEnabled(true);
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}
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//+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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//增加文件夹
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void ExQTreeWidget::on_actAddFolder_triggered()
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{
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QString path = QFileDialog::getExistingDirectory(); //选择目录
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if (! path.isEmpty()) {
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QTreeWidgetItem* item = ui->treeFiles->currentItem(); //获取当前节点
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if(item != nullptr)
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addFolderItem(item, path);
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}
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}
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//添加图片
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void ExQTreeWidget::on_actAddFile_triggered()
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{
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QStringList list = QFileDialog::getOpenFileNames(this, "选择多个将要加载的图片", "", "Images(*.jpg, *.png, *.*)"); //选择目录
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if (! list.isEmpty()) {
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QTreeWidgetItem* parItem = nullptr;
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QTreeWidgetItem* item = ui->treeFiles->currentItem(); //获取当前节点
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if (item == nullptr)
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return;
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if (item->type() == treeItemType::itemImage) { //获得父节点
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parItem = item->parent();
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} else {
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parItem = item;
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}
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for (int i = 0; i < list.size(); i++) {
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QString strName = list.at(i); //获得文件名称
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addImageItem(parItem, strName); //添加图片文件到文件节点
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}
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}
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}
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//删除节点
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void ExQTreeWidget::on_actDeleFile_triggered()
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{
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QTreeWidgetItem* parItem = nullptr;
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QTreeWidgetItem* currItem = ui->treeFiles->currentItem();
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if (currItem->type() != treeItemType::itemRoot)
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parItem = currItem->parent(); //只能够由其父节点删除
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// else
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// ui->treeFiles->takeTopLevelItem(0); //删除顶层节点使用这个
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if (currItem == nullptr || parItem == nullptr)
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return;
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parItem->removeChild(currItem); //移除没有从内存中删除，所以delete删除
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delete currItem;
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}
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//遍历所有的顶层节点(本处只有一个root顶层节点)
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void ExQTreeWidget::on_actScanItems_triggered()
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{
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for (int i = 0; i < ui->treeFiles->topLevelItemCount(); i++) {
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QTreeWidgetItem* currItem = ui->treeFiles->topLevelItem(i); //顶层item
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changeItemCaption(currItem);
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}
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}
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//图片自动适应高度
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void ExQTreeWidget::on_actAdaptiveHeight_triggered()
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{
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int height = ui->scrollArea->height(); //得到scrollArea的高度
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int realHeight = m_curPixmap.height(); //原始图片的实际高度
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m_ratio = height * 1.0 / realHeight; //当前显示比例，必须转换为浮点数
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QPixmap pixmap = m_curPixmap.scaledToHeight(height - 50); //图片缩放到指定高度
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ui->labDisplay->setPixmap(pixmap); //设置Label的PixMap
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}
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//图片自动适应宽度
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void ExQTreeWidget::on_actAdaptiveWidth_triggered()
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{
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int width = ui->scrollArea->width();
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int realWidth = m_curPixmap.width();
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m_ratio = width * 1.0 / realWidth;
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QPixmap pixmap = m_curPixmap.scaledToHeight(width - 50);
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ui->labDisplay->setPixmap(pixmap);
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}
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//当前节点变化的时候，自动加载当前图片
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void ExQTreeWidget::on_treeFiles_currentItemChanged(QTreeWidgetItem *current, QTreeWidgetItem *previous)
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{
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if (current != nullptr && previous != nullptr) {
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displayImage(current);
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}
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}
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//放大
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void ExQTreeWidget::on_actAmplification_triggered()
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{
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m_ratio *= 1.2; //在当前比例基础上乘以0.8
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int height = m_curPixmap.height() * m_ratio; // 显示宽度
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int widht = m_curPixmap.width() * m_ratio; // 显示宽度
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QPixmap pix = m_curPixmap.scaled(widht, height); //图片缩放到指定高度和宽度，保持长宽比例
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ui->labDisplay->setPixmap(pix);
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}
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//缩小
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void ExQTreeWidget::on_actShrink_triggered()
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{
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m_ratio *= 0.8;
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int height = m_curPixmap.height() * m_ratio;
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int widht = m_curPixmap.width() * m_ratio;
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QPixmap pix = m_curPixmap.scaled(widht, height);
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ui->labDisplay->setPixmap(pix);
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}
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//还原
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void ExQTreeWidget::on_actZoomRealSize_triggered()
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{
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m_ratio = 1;
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int height = m_curPixmap.height();
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int widht = m_curPixmap.width();
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QPixmap pix = m_curPixmap.scaled(widht, height);
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ui->labDisplay->setPixmap(pix);
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}
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//设置Dock窗口是否浮动
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void ExQTreeWidget::on_actDockFloating_triggered(bool check)
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{
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ui->dockWidget->setFloating(check);
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}
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//设置Dock窗口是否隐藏不显示
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void ExQTreeWidget::on_actDockVisible_triggered(bool checked)
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{
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ui->dockWidget->setVisible(!checked);
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}
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//退出
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void ExQTreeWidget::on_actQiut_triggered()
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{
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close();
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}
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//单击DockWidget组件的标题栏的关闭按钮时候，会隐藏在停靠区域，并且发射信号visibilityChanged; 停靠区域可见性变化
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void ExQTreeWidget::on_dockWidget_visibilityChanged(bool visible)
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{
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ui->actDockVisible->setChecked(visible);
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}
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//当拖动DockWidget组件，使其浮动或者停靠时候，会发射信号topLevelChanged; 更新其Action的状态
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void ExQTreeWidget::on_dockWidget_topLevelChanged(bool topLevel)
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{
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ui->actDockFloating->setChecked(topLevel);
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}
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