The QWebHistory class represents the history of a QWebPage 更多...
| 头： | #include <QWebHistory> |
| Since: | Qt 4.4 |
| void | back () |
| QWebHistoryItem | backItem () const |
| QList<QWebHistoryItem> | backItems (int maxItems ) const |
| bool | canGoBack () const |
| bool | canGoForward () const |
| void | clear () |
| int | count () const |
| QWebHistoryItem | currentItem () const |
| int | currentItemIndex () const |
| void | forward () |
| QWebHistoryItem | forwardItem () const |
| QList<QWebHistoryItem> | forwardItems (int maxItems ) const |
| void | goToItem (const QWebHistoryItem & item ) |
| QWebHistoryItem | itemAt (int i ) const |
| QList<QWebHistoryItem> | 项 () const |
| int | maximumItemCount () const |
| void | setMaximumItemCount (int count ) |
| QDataStream & | operator<< (QDataStream & stream , const QWebHistory & history ) |
| QDataStream & | operator>> (QDataStream & stream , QWebHistory & history ) |
The QWebHistory class represents the history of a QWebPage
每个 QWebPage instance contains a history of visited pages that can be accessed by QWebPage::history (). QWebHistory represents this history and makes it possible to navigate it.
The history uses the concept of a current item , dividing the pages visited into those that can be visited by navigating back and forward 使用 back () 和 forward () functions. The current item can be obtained by calling currentItem (), and an arbitrary item in the history can be made the current item by passing it to goToItem ().
A list of items describing the pages that can be visited by going back can be obtained by calling the backItems () function; similarly, items describing the pages ahead of the current page can be obtained with the forwardItems () function. The total list of items is obtained with the 项 () 函数。
Just as with containers, functions are available to examine the history in terms of a list. Arbitrary items in the history can be obtained with itemAt (), the total number of items is given by count (), and the history can be cleared with the clear () 函数。
QWebHistory 's state can be saved to a QDataStream using the >> operator and loaded by using the << operator.
另请参阅 QWebHistoryItem , QWebHistoryInterface ，和 QWebPage .
Set the current item to be the previous item in the history and goes to the corresponding page; i.e., goes back one history item.
另请参阅 forward () 和 goToItem ().
返回历史中在当前项之前的项。
Returns the list of items in the backwards history list. At most maxItems entries are returned.
另请参阅 forwardItems ().
Returns true if there is an item preceding the current item in the history; otherwise returns false.
另请参阅 canGoForward ().
Returns true if we have an item to go forward to; otherwise returns false.
另请参阅 canGoBack ().
清零历史。
Returns the total number of items in the history.
Returns the current item in the history.
Returns the index of the current item in history.
该函数在 Qt 4.5 引入。
Sets the current item to be the next item in the history and goes to the corresponding page; i.e., goes forward one history item.
Returns the item after the current item in the history.
Returns the list of items in the forward history list. At most maxItems entries are returned.
另请参阅 backItems ().
Sets the current item to be the specified item in the history and goes to the page.
Returns the item at index i in the history.
Returns a list of all items currently in the history.
Returns the maximum number of items in the history.
该函数在 Qt 4.5 引入。
另请参阅 setMaximumItemCount ().
Sets the maximum number of items in the history to count .
该函数在 Qt 4.5 引入。
另请参阅 maximumItemCount ().
The operator<< function streams a history into a data stream.
It saves the history 到指定 stream .
该函数在 Qt 4.6 引入。
The operator>> function loads a history from a data stream.
Loads a QWebHistory 从指定 stream 进给定 history .
该函数在 Qt 4.6 引入。
