QPlaceIcon Class

The QPlaceIcon class represents an icon. 更多...

頭：	#include <QPlaceIcon>
qmake:	QT += location

• 所有成員列錶，包括繼承成員

公共函數

	QPlaceIcon ()
	QPlaceIcon (const QPlaceIcon & other )
	~QPlaceIcon ()
bool	isEmpty () const
QPlaceManager *	manager () const
QVariantMap	參數 () const
void	setManager (QPlaceManager * manager )
void	setParameters (const QVariantMap & 參數 )
QUrl	url (const QSize & size = QSize()) const
QPlaceIcon &	operator= (const QPlaceIcon & other )

靜態公共成員

const QString

SingleUrl

相關非成員

bool	operator!= (const QPlaceIcon & lhs , const QPlaceIcon & rhs )
bool	operator== (const QPlaceIcon & lhs , const QPlaceIcon & rhs )

詳細描述

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.

成員函數文檔編製

QPlaceIcon:: QPlaceIcon ()

Constructs an icon.

QPlaceIcon:: QPlaceIcon (const QPlaceIcon & other )

構造副本為 other .

QPlaceIcon:: ~QPlaceIcon ()

銷毀圖標。

bool QPlaceIcon:: isEmpty () const

Returns a boolean indicating whether the all the fields of the icon are empty or not.

QPlaceManager *QPlaceIcon:: manager () const

Returns the manager that this icon is associated with.

注意： Getter function for property manager.

另請參閱 setManager ().

QVariantMap QPlaceIcon:: 參數 () const

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.

注意： getter 函數對於特性 參數 .

另請參閱 setParameters ().

void QPlaceIcon:: setManager ( QPlaceManager * manager )

設置 manager that this icon is associated with. The icon does not take ownership of the pointer.

注意： setter 函數對於特性 manager .

另請參閱 manager ().

void QPlaceIcon:: setParameters (const QVariantMap & 參數 )

Sets the parameters of the icon to parameters .

注意： setter 函數對於特性 參數 .

另請參閱 參數 ().

[invokable] QUrl QPlaceIcon:: url (const QSize & size = QSize()) const

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 被返迴。

注意： 此函數可以被援引，通過元對象係統和從 QML。見 Q_INVOKABLE .

QPlaceIcon &QPlaceIcon:: operator= (const QPlaceIcon & other )

賦值 other to this icon and returns a reference to this icon.

成員變量文檔編製

const QString QPlaceIcon:: SingleUrl

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 () 被調用。

相關非成員

bool operator!= (const QPlaceIcon & lhs , const QPlaceIcon & rhs )

返迴 true 若 lhs 不等於 rhs ，否則返迴 false。

bool operator== (const QPlaceIcon & lhs , const QPlaceIcon & rhs )

返迴 true 若 lhs 等於 rhs ，否則返迴 false。

內容

1. 公共函數

2. 靜態公共成員

3. 相關非成員

4. 詳細描述