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公共類型
公共函數
詳細描述

QTreeWidgetItemIterator 類

The QTreeWidgetItemIterator class provides a way to iterate over the items in a QTreeWidget 實例。更多...

頭：	#include <QTreeWidgetItemIterator>
qmake:	QT += widgets

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公共類型

enum	IteratorFlag { All, Hidden, NotHidden, Selected, ..., UserFlag }
flags	IteratorFlags

公共函數

	QTreeWidgetItemIterator (const QTreeWidgetItemIterator & it )
	QTreeWidgetItemIterator (QTreeWidget * widget , QTreeWidgetItemIterator::IteratorFlags flags = All)
	QTreeWidgetItemIterator (QTreeWidgetItem * item , QTreeWidgetItemIterator::IteratorFlags flags = All)
	~QTreeWidgetItemIterator ()
QTreeWidgetItem *	operator* () const
QTreeWidgetItemIterator &	operator++ ()
const QTreeWidgetItemIterator	operator++ ( int )
QTreeWidgetItemIterator &	operator+= (int n )
QTreeWidgetItemIterator &	operator-- ()
const QTreeWidgetItemIterator	operator-- ( int )
QTreeWidgetItemIterator &	operator-= (int n )
QTreeWidgetItemIterator &	operator= (const QTreeWidgetItemIterator & it )

詳細描述

The QTreeWidgetItemIterator class provides a way to iterate over the items in a QTreeWidget 實例。

迭代器將按預定次序的遍曆順序走查項，從而拜訪父級節點 before 它繼續到子級節點。

例如，以下代碼範例中的每一樹項，對照用戶指定的搜索字符串校驗首列文本：

    QTreeWidgetItemIterator it(treeWidget);
    while (*it) {
        if ((*it)->text(0) == itemText)
            (*it)->setSelected(true);
        ++it;
    }

過濾齣某些類型的節點也是可能的，通過傳遞一些 flags to the constructor of QTreeWidgetItemIterator .

另請參閱 QTreeWidget , 模型/視圖編程，和 QTreeWidgetItem .

成員類型文檔編製

enum QTreeWidgetItemIterator:: IteratorFlag
flags QTreeWidgetItemIterator:: IteratorFlags

這些標誌可以傳遞給 QTreeWidgetItemIterator 構造函數 (OR 在一起若使用一個以上)，以便迭代器將僅迭代匹配給定標誌的項。

常量	值
`QTreeWidgetItemIterator::All`	`0x00000000`
`QTreeWidgetItemIterator::Hidden`	`0x00000001`
`QTreeWidgetItemIterator::NotHidden`	`0x00000002`
`QTreeWidgetItemIterator::Selected`	`0x00000004`
`QTreeWidgetItemIterator::Unselected`	`0x00000008`
`QTreeWidgetItemIterator::Selectable`	`0x00000010`
`QTreeWidgetItemIterator::NotSelectable`	`0x00000020`
`QTreeWidgetItemIterator::DragEnabled`	`0x00000040`
`QTreeWidgetItemIterator::DragDisabled`	`0x00000080`
`QTreeWidgetItemIterator::DropEnabled`	`0x00000100`
`QTreeWidgetItemIterator::DropDisabled`	`0x00000200`
`QTreeWidgetItemIterator::HasChildren`	`0x00000400`
`QTreeWidgetItemIterator::NoChildren`	`0x00000800`
`QTreeWidgetItemIterator::Checked`	`0x00001000`
`QTreeWidgetItemIterator::NotChecked`	`0x00002000`
`QTreeWidgetItemIterator::Enabled`	`0x00004000`
`QTreeWidgetItemIterator::Disabled`	`0x00008000`
`QTreeWidgetItemIterator::Editable`	`0x00010000`
`QTreeWidgetItemIterator::NotEditable`	`0x00020000`
`QTreeWidgetItemIterator::UserFlag`	`0x01000000`

IteratorFlags 類型是 typedef 對於 QFlags <IteratorFlag>。它存儲 IteratorFlag 值的 OR 組閤。

成員函數文檔編製

QTreeWidgetItemIterator:: QTreeWidgetItemIterator (const QTreeWidgetItemIterator & it )

構造迭代器為相同 QTreeWidget as it 。當前迭代器項被設為指嚮當前項在 it .

QTreeWidgetItemIterator:: QTreeWidgetItemIterator ( QTreeWidget * widget , QTreeWidgetItemIterator::IteratorFlags flags = All)

構造迭代器為給定 widget 使用指定 flags 以確定在迭代期間找到哪些項。迭代器被設為指嚮 Widget 包含的第一頂層項，或下一匹配項若頂層項不匹配標誌。

另請參閱 QTreeWidgetItemIterator::IteratorFlag .

QTreeWidgetItemIterator:: QTreeWidgetItemIterator ( QTreeWidgetItem * item , QTreeWidgetItemIterator::IteratorFlags flags = All)

構造迭代器為給定 item 使用指定 flags 以確定在迭代期間找到哪些項。迭代器被設為指嚮 item ，或下一匹配項若 item 不匹配標誌。

另請參閱 QTreeWidgetItemIterator::IteratorFlag .

QTreeWidgetItemIterator:: ~QTreeWidgetItemIterator ()

銷毀迭代器。

QTreeWidgetItem QTreeWidgetItemIterator:: operator () const

解引用運算符。返迴指嚮當前項的指針。

QTreeWidgetItemIterator &QTreeWidgetItemIterator:: operator++ ()

The prefix ++ operator (++it) advances the iterator to the next matching item and returns a reference to the resulting iterator. Sets the current pointer to 0 if the current item is the last matching item.

const QTreeWidgetItemIterator QTreeWidgetItemIterator:: operator++ ( int )

後綴 ++ 運算符 (it++) 把迭代器推進到下一匹配項，並返迴指嚮先前當前項迭代器。

QTreeWidgetItemIterator &QTreeWidgetItemIterator:: operator+= ( int n )

使迭代器前進 n 匹配項 (若 n 為負，迭代器後退)。

If the current item is beyond the last item, the current item pointer is set to 0. Returns the resulting iterator.

QTreeWidgetItemIterator &QTreeWidgetItemIterator:: operator-- ()

The prefix -- operator (--it) advances the iterator to the previous matching item and returns a reference to the resulting iterator. Sets the current pointer to 0 if the current item is the first matching item.

const QTreeWidgetItemIterator QTreeWidgetItemIterator:: operator-- ( int )

後綴 -- 運算符 (it--) 使之前的匹配當前項，並返迴指嚮先前當前項迭代器。

QTreeWidgetItemIterator &QTreeWidgetItemIterator:: operator-= ( int n )

使迭代器後退 n 匹配項 (若 n 為負，迭代器前進)。

If the current item is ahead of the last item, the current item pointer is set to 0. Returns the resulting iterator.

QTreeWidgetItemIterator &QTreeWidgetItemIterator:: operator= (const QTreeWidgetItemIterator & it )

賦值。製作副本為 it 並返迴其迭代器的引用。

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