The QPlaceIcon class represents an icon. 更多...
| 头： | #include <QPlaceIcon> |
| qmake: | QT += location |
| Since: | Qt 5.6 |
| QPlaceIcon () | |
| QPlaceIcon (const QPlaceIcon & other ) | |
| ~QPlaceIcon () | |
| bool | isEmpty () const |
| QPlaceManager * | manager () const |
| QVariantMap | 参数 () const |
| void | setManager (QPlaceManager * manager ) |
| void | setParameters (const QVariantMap & 参数 ) |
| QUrl | url (const QSize & size = QSize()) const |
| bool | operator!= (const QPlaceIcon & other ) const |
| QPlaceIcon & | operator= (const QPlaceIcon & other ) |
| bool | operator== (const QPlaceIcon & other ) const |
| const QString | SingleUrl |
The QPlaceIcon class represents an icon.
The typical usage of an icon is to use the url () function to specify a preferred icon size.
QUrl iconSourceUrl = place.icon().url(QSize(32,32)); //A default icon may also be requested like so iconSourceUrl = place.icon().url();
The icons are typically backend dependent, if a manager backend does not support a given size, the URL of the icon that most closely matches those parameters is returned.
The icon class also has a key-value set of parameters. The precise key one needs to use depends on the plugin being used. These parameters influence which icon URL is returned by the manager and may also be used to specify icon URL locations when saving icons.
If there is only ever one image for an icon, then QPlaceIcon::SingleUrl can be used as a parameter key with a QUrl as the associated value. If this key is set, then the url () function will always return the specified URL and not defer to any manager.
Constructs an icon.
构造副本为 other .
销毁图标。
Returns a boolean indicating whether the all the fields of the icon are empty or not.
Returns the manager that this icon is associated with.
另请参阅 setManager ().
Returns a set of parameters for the icon that are manager/plugin specific. These parameters are used by the manager to return the appropriate URL when url () is called and to specify locations to save to when saving icons.
Consult the plugin documentation for what parameters are supported and how they should be used.
另请参阅 setParameters ().
设置 manager that this icon is associated with. The icon does not take ownership of the pointer.
另请参阅 manager ().
Sets the parameters of the icon to 参数 .
另请参阅 参数 ().
Returns an icon URL according to the given size .
If no manager has been assigned to the icon, and the parameters do not contain the QPlaceIcon::SingleUrl key, a default constructed QUrl 被返回。
返回 true 若 other is not equal to this icon, otherwise returns false.
赋值 other to this icon and returns a reference to this icon.
Returns true if this icon is equal to other ，否则返回 false。
Parameter key for an icon that only has a single image URL.
The parameter value to be used with this key is a QUrl . An icon with this parameter set will always return the specified URL regardless of the requested size when url () 被调用。
