QPdfDocument 类加载 PDF 文档并渲染其页面。 更多...
| 头： | #include <QPdfDocument> |
| Since: | Qt 5.10 |
| 继承： | QObject |
该类在 Qt 5.10 引入。
| enum | MetaDataField { Title, Author, Subject, Keywords, Creator, …, ModificationDate } |
| enum | Status { Null, Loading, Ready, Unloading, Error } |
| QPdfDocument (QObject * parent = nullptr) | |
| virtual | ~QPdfDocument () |
| void | close () |
| QPdfSelection | getAllText (int page ) |
| QPdfSelection | getSelection (int page , QPointF start , QPointF end ) |
| QPdfSelection | getSelectionAtIndex (int page , int startIndex , int maxLength ) |
| QVariant | metaData (QPdfDocument::MetaDataField field ) const |
| int | pageCount () const |
| QString | password () const |
| QImage | render (int page , QSize imageSize , QPdfDocumentRenderOptions renderOptions = QPdfDocumentRenderOptions()) |
| void | setPassword (const QString & password ) |
| QPdfDocument::Status | status () const |
| void | pageCountChanged (int pageCount ) |
| void | passwordChanged () |
| void | statusChanged (QPdfDocument::Status status ) |
此枚举描述元数据的可用字段。
| 常量 | 值 | 描述 |
|---|---|---|
QPdfDocument::Title
|
0
|
文档的标题作为 QString . |
QPdfDocument::Author
|
2
|
The name of the person who created the document as QString . |
QPdfDocument::Subject
|
1
|
The subject of the document as QString . |
QPdfDocument::Keywords
|
3
|
Keywords associated with the document as QString . |
QPdfDocument::Creator
|
5
|
If the document was converted to PDF from another format, the name of the conforming product that created the original document from which it was converted as QString . |
QPdfDocument::Producer
|
4
|
If the document was converted to PDF from another format, the name of the conforming product that converted it to PDF as QString . |
QPdfDocument::CreationDate
|
6
|
The date and time the document was created as QDateTime . |
QPdfDocument::ModificationDate
|
7
|
The date and time the document was most recently modified as QDateTime . |
另请参阅 QPdfDocument::metaData ().
此枚举描述文档的当前状态。
| 常量 | 值 | 描述 |
|---|---|---|
QPdfDocument::Null
|
0
|
The initial status after the document has been created or after it has been closed. |
QPdfDocument::Loading
|
1
|
The status after load() has been called and before the document is fully loaded. |
QPdfDocument::Ready
|
2
|
The status when the document is fully loaded and its data can be accessed. |
QPdfDocument::Unloading
|
3
|
The status after close () has been called on an open document. At this point the document is still valid and all its data can be accessed. |
QPdfDocument::Error
|
4
|
加载后的状态，若加载失败。 |
另请参阅 QPdfDocument::status ().
构造新文档采用父级对象 parent .
[virtual]
QPdfDocument::
~QPdfDocument
()
销毁文档。
关闭文档。
返回所有文本及其边界在给定 page .
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
Returns information about the text on the given page that can be found between the given start and end points, if any.
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
Returns information about the text on the given page that can be found beginning at the given startIndex with at most maxLength characters.
注意： 此函数可以被援引，通过元对象系统和从 QML。见 Q_INVOKABLE .
Returns the meta data of the document for the given field .
Returns the amount of pages for the loaded document or
0
若未加载文档。
注意： Getter 函数对于特性 pageCount。
渲染 page 成 QImage 的大小 imageSize according to the provided renderOptions .
Returns the rendered page or an empty image in case of an error.
注意：若 imageSize does not match the aspect ratio of the page in the PDF document, the page is rendered scaled, so that it covers the complete imageSize .
Returns the current status of the document.
注意： Getter 函数对于特性 status。