学步园

知识点：

QTreeWidget

QTreeWidgetItem

QDockWidget

QVBoxLayout

1. Qt的界面布局中使用了层的概念，layout，当主窗口改变后，窗口中控件尺寸随之改变，对于layout需要设置margin。
2. QTreeWidget的基本元素是QTreeWidgetItem，
3. QTreeWidgetItem *styleItem = new QTreeWidgetItem(familyItem);
   //familyItem为styleItem的父节点，QT中所有的窗口控件都是这种方式构造的~

效果图:

核心代码如下：

//-----------------------------------------------------------------------<br /> dockWidget = new QDockWidget(this);<br /> dockWidget->setObjectName(QString::fromUtf8("dockWidget"));<br /> dockWidget->setFeatures(QDockWidget::DockWidgetFloatable|QDockWidget::DockWidgetMovable|QDockWidget::AllDockWidgetFeatures);<br /> dockWidgetContents = new QWidget();<br /> dockWidgetContents->setObjectName(QString::fromUtf8("dockWidgetContents"));</p> <p> vboxLayout = new QVBoxLayout(dockWidgetContents);<br /> vboxLayout->setSpacing(60);<br /> vboxLayout->setObjectName(QString::fromUtf8("vboxLayout"));</p> <p> mTree = new QTreeWidget(dockWidgetContents);<br /> mTree->setObjectName(QString::fromUtf8("scene"));<br /> mTree->setSelectionMode(QAbstractItemView::ExtendedSelection);</p> <p> vboxLayout->addWidget(mTree);<br /> dockWidget->setWidget(dockWidgetContents);<br /> this->addDockWidget(static_cast<Qt::DockWidgetArea>(1), dockWidget);</p> <p> mTree->setColumnCount(1);<br /> mTree->setHeaderLabels(QStringList() << tr("Scene"));<br /> mTree->setSelectionMode(QAbstractItemView::ExtendedSelection);</p> <p> // Demonstrating look and feel features<br /> mTree->setAnimated(true);<br /> mTree->setIndentation(20);<br /> mTree->setSortingEnabled(false);</p> <p> //----------------------------------<br /> QTreeWidgetItem *familyItem = new QTreeWidgetItem(mTree);<br /> familyItem->setText(0, QString("MyFamily"));<br /> //familyItem->setCheckState(0, Qt::Unchecked);</p> <p> QString treeItems[5] = {"One","Two", "Three", "Four", "Five"};<br /> for (int i(0); i<5; i++)<br /> {<br /> QTreeWidgetItem *styleItem = new QTreeWidgetItem(familyItem);<br /> styleItem->setText(0, treeItems[i]);<br /> if (i%2)<br /> styleItem->setIcon(0, QIcon("gift.png"));<br /> else<br /> styleItem->setIcon(0, QIcon("gift1.png"));<br /> //styleItem->setCheckState(0, Qt::Unchecked);<br /> //styleItem->setData(0, Qt::UserRole, QVariant(i));<br /> for (int j(0); j<=i; j++)<br /> {<br /> QTreeWidgetItem *childItem = new QTreeWidgetItem(styleItem);<br /> childItem->setText(0, "apple");<br /> childItem->setIcon(0, QIcon("treeItem.png"));<br /> }<br /> }<br /> //----------------------------------