The QStyleOptionViewItem class is used to describe the parameters used to draw an item in a view widget. 更多...
| 头： | #include <QStyleOptionViewItem> |
| 继承： | QStyleOption |
| 继承者： | QStyleOptionViewItemV2 |
| enum | Position { Left, Right, Top, Bottom } |
| enum | StyleOptionType { Type } |
| enum | StyleOptionVersion { Version } |
| QStyleOptionViewItem () | |
| QStyleOptionViewItem (const QStyleOptionViewItem & other ) |
| Qt::Alignment | decorationAlignment |
| Position | decorationPosition |
| QSize | decorationSize |
| Qt::Alignment | displayAlignment |
| QFont | font |
| bool | showDecorationSelected |
| Qt::TextElideMode | textElideMode |
The QStyleOptionViewItem class is used to describe the parameters used to draw an item in a view widget.
QStyleOptionViewItem contains all the information that QStyle 函数需要为 Qt 模型/视图类绘制项。
For performance reasons, the access to the member variables is direct (i.e., using the
.
or
->
operator). This low-level feel makes the structures straightforward to use and emphasizes that these are simply parameters used by the style functions.
对于可以如何使用样式选项的演示范例，见 样式 范例。
另请参阅 QStyleOption and 模型/视图编程 .
This enum describes the position of the item's decoration.
| 常量 | 值 | 描述 |
|---|---|---|
QStyleOptionViewItem::Left
|
0
|
On the left of the text. |
QStyleOptionViewItem::Right
|
1
|
On the right of the text. |
QStyleOptionViewItem::Top
|
2
|
Above the text. |
QStyleOptionViewItem::Bottom
|
3
|
Below the text. |
另请参阅 decorationPosition .
This enum is used to hold information about the type of the style option, and is defined for each QStyleOption 子类。
| 常量 | 值 | 描述 |
|---|---|---|
QStyleOptionViewItem::Type
|
SO_ViewItem
|
提供样式选项的类型 ( SO_ViewItem 对于此类)。 |
类型内部使用通过 QStyleOption ，其子类，和 qstyleoption_cast () to determine the type of style option. In general you do not need to worry about this unless you want to create your own QStyleOption subclass and your own styles.
另请参阅 StyleOptionVersion .
This enum is used to hold information about the version of the style option, and is defined for each QStyleOption 子类。
| 常量 | 值 | 描述 |
|---|---|---|
QStyleOptionViewItem::Version
|
1
|
1 |
版本的使用通过 QStyleOption 子类以实现扩展在不破坏兼容性的情况下。若使用 qstyleoption_cast ()，通常不需要校验它。
另请参阅 StyleOptionType .
构造 QStyleOptionViewItem , initializing the members variables to their default values.
构造副本为 other 样式选项。
This variable holds the alignment of the decoration for the item.
默认值为 Qt::AlignLeft .
This variable holds the position of the decoration for the item.
默认值为 Left .
另请参阅 Position .
This variable holds the size of the decoration for the item.
默认值为 QSize (-1, -1)，即：无效尺寸。
另请参阅 decorationAlignment and decorationPosition .
This variable holds the alignment of the display value for the item.
默认值为 Qt::AlignLeft .
This variable holds the font used for the item.
By default, the application's default font is used.
另请参阅 QFont .
This variable holds whether the decoration should be highlighted on selected items.
If this option is true, the branch and any decorations on selected items should be highlighted, indicating that the item is selected; otherwise, no highlighting is required. The default value is false.
另请参阅 QStyle::SH_ItemView_ShowDecorationSelected and QAbstractItemView .
This variable holds where ellipsis should be added for text that is too long to fit into an item.
默认值为 Qt::ElideMiddle , i.e. the ellipsis appears in the middle of the text.
另请参阅 Qt::TextElideMode and QStyle::SH_ItemView_EllipsisLocation .
