QStyleOptionViewItem 類是用於繪製視圖 Widget 中項的描述參數。 更多...
| 頭： | #include <QStyleOptionViewItem> |
| qmake: | QT += widgets |
| 繼承： | QStyleOption |
| enum | Position { Left, Right, Top, Bottom } |
| enum | StyleOptionType { Type } |
| enum | StyleOptionVersion { Version } |
| enum | ViewItemFeature { None, WrapText, Alternate, HasCheckIndicator, HasDisplay, HasDecoration } |
| flags | ViewItemFeatures |
| enum | ViewItemPosition { Invalid, Beginning, Middle, End, OnlyOne } |
| QStyleOptionViewItem (const QStyleOptionViewItem & other ) | |
| QStyleOptionViewItem () |
| QBrush | backgroundBrush |
| Qt::CheckState | checkState |
| Qt::Alignment | decorationAlignment |
| QStyleOptionViewItem::Position | decorationPosition |
| QSize | decorationSize |
| Qt::Alignment | displayAlignment |
| QStyleOptionViewItem::ViewItemFeatures | features |
| QFont | font |
| QIcon | icon |
| QModelIndex | index |
| bool | showDecorationSelected |
| QString | text |
| Qt::TextElideMode | textElideMode |
| QStyleOptionViewItem::ViewItemPosition | viewItemPosition |
QStyleOptionViewItem 包含所有信息當 QStyle 函數需要為 Qt 模型/視圖類繪製項。
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.
對於可以如何使用樣式選項的演示範例，見 樣式 範例。
另請參閱 QStyleOption and 模型/視圖編程 .
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. |
另請參閱 decorationPosition .
This enum is used to hold information about the type of the style option, and is defined for each QStyleOption 子類。
| 常量 | 值 | 描述 |
|---|---|---|
QStyleOptionViewItem::Type
|
SO_ViewItem
|
提供樣式選項的類型 ( SO_ViewItem 對於此類)。 |
類型內部使用通過 QStyleOption ，其子類，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.
另請參閱 StyleOptionVersion .
This enum is used to hold information about the version of the style option, and is defined for each QStyleOption 子類。
| 常量 | 值 | 描述 |
|---|---|---|
QStyleOptionViewItem::Version
|
4
|
4 |
版本的使用通過 QStyleOption 子類以實現擴展在不破壞兼容性的情況下。若使用 qstyleoption_cast ()，通常不需要校驗它。
另請參閱 StyleOptionType .
This enum describes the different types of features an item can have.
| 常量 | 值 | 描述 |
|---|---|---|
QStyleOptionViewItem::None
|
0x00
|
指示正常項。 |
QStyleOptionViewItem::WrapText
|
0x01
|
Indicates an item with wrapped text. |
QStyleOptionViewItem::Alternate
|
0x02
|
Indicates that the item's background is rendered using alternateBase. |
QStyleOptionViewItem::HasCheckIndicator
|
0x04
|
Indicates that the item has a check state indicator. |
QStyleOptionViewItem::HasDisplay
|
0x08
|
Indicates that the item has a display role. |
QStyleOptionViewItem::HasDecoration
|
0x10
|
Indicates that the item has a decoration role. |
The ViewItemFeatures type is a typedef for QFlags <ViewItemFeature>. It stores an OR combination of ViewItemFeature values.
This enum is used to represent the placement of the item on a row. This can be used to draw items differently depending on their placement, for example by putting rounded edges at the beginning and end, and straight edges in between.
| 常量 | 值 | 描述 |
|---|---|---|
QStyleOptionViewItem::Invalid
|
0
|
The ViewItemPosition is unknown and should be disregarded. |
QStyleOptionViewItem::Beginning
|
1
|
The item appears at the beginning of the row. |
QStyleOptionViewItem::Middle
|
2
|
The item appears in the middle of the row. |
QStyleOptionViewItem::End
|
3
|
The item appears at the end of the row. |
QStyleOptionViewItem::OnlyOne
|
4
|
The item is the only one on the row, and is therefore both at the beginning and the end. |
構造副本為 other 樣式選項。
Constructs a QStyleOptionViewItem, initializing the members variables to their default values.
The QBrush that should be used to paint the view items background.
If this view item is checkable, i.e., ViewItemFeature::HasCheckIndicator is true,
checkState
is true if the item is checked; otherwise, it is false.
This variable holds the alignment of the decoration for the item
默認值為 Qt::AlignLeft .
This variable holds the position of the decoration for the item
默認值為 Left .
另請參閱 Position .
This variable holds the size of the decoration for the item
默認值為 QSize (-1, -1)，即：無效尺寸。
另請參閱 decorationAlignment and decorationPosition .
This variable holds the alignment of the display value for the item
默認值為 Qt::AlignLeft .
This variable holds a bitwise OR of the features that describe this view item
另請參閱 ViewItemFeature .
This variable holds the font used for the item
By default, the application's default font is used.
另請參閱 QFont .
視圖項要繪製的圖標 (若有的話)。
要繪製的模型索引。
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.
另請參閱 QStyle::SH_ItemView_ShowDecorationSelected and QAbstractItemView .
The text (if any) to be drawn in the view item.
where ellipsis should be added for text that is too long to fit into an item
默認值為 Qt::ElideMiddle , i.e. the ellipsis appears in the middle of the text.
另請參閱 Qt::TextElideMode and QStyle::SH_ItemView_EllipsisLocation .
Gives the position of this view item relative to other items. See the ViewItemPosition enum for the details.
