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The QStyleOptionViewItem class is used to describe the parameters used to draw an item in a view widget. More.
Header: | #include <QStyleOptionViewItem> |
qmake: | QT += widgets |
Inherits: | QStyleOption |
Public Types
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 } |
Public Functions
QStyleOptionViewItem(const QStyleOptionViewItem &other) |
QStyleOptionViewItem() |
Public Variables
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 |
Detailed Description
QStyleOptionViewItem contains all the information that QStyle functions need to draw the items for Qt's model/view classes.
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.For an example demonstrating how style options can be used, see the Styles example.
See also QStyleOption and Model/View Programming.
Member Type Documentation
enum QStyleOptionViewItem::Position
This enum describes the position of the item's decoration.
Constant | Value | Description |
---|---|---|
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. |
See also Michigan casinos and hotels. decorationPosition.
enum QStyleOptionViewItem::StyleOptionType
This enum is used to hold information about the type of the style option, and is defined for each QStyleOption subclass.
Constant | Value | Description |
---|---|---|
QStyleOptionViewItem::Type | SO_ViewItem | The type of style option provided (SO_ViewItem for this class). |
The type is used internally by QStyleOption, its subclasses, and 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.
See also Lovely outlaws slot machine. StyleOptionVersion.
enum QStyleOptionViewItem::StyleOptionVersion
This enum is used to hold information about the version of the style option, and is defined for each QStyleOption subclass.
Constant | Value | Description |
---|---|---|
QStyleOptionViewItem::Version | 4 | 4 |
The version is used by QStyleOption subclasses to implement extensions without breaking compatibility. If you use qstyleoption_cast(), you normally do not need to check it.
Jackpot party casino slots on facebook. See also StyleOptionType.
enum QStyleOptionViewItem::ViewItemFeature
flags QStyleOptionViewItem::ViewItemFeatures
Types of gambling machines. This enum describes the different types of features an item can have.
Constant | Value | Description |
---|---|---|
QStyleOptionViewItem::None | 0x00 | Indicates a normal item. |
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. |
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The ViewItemFeatures type is a typedef for QFlags<ViewItemFeature>. It stores an OR combination of ViewItemFeature values.
enum QStyleOptionViewItem::ViewItemPosition
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.
Constant | Value | Description |
---|---|---|
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. |
Member Function Documentation
QStyleOptionViewItem::QStyleOptionViewItem(const QStyleOptionViewItem &other)
Constructs a copy of the other style option.
QStyleOptionViewItem::QStyleOptionViewItem()
Constructs a QStyleOptionViewItem, initializing the members variables to their default values.
Member Variable Documentation
QBrush QStyleOptionViewItem::backgroundBrush
The QBrush that should be used to paint the view items background.
Qt::CheckState QStyleOptionViewItem::checkState
If this view item is checkable, i.e., ViewItemFeature::HasCheckIndicator is true,
checkState
is true if the item is checked; otherwise, it is false.Qt::Alignment QStyleOptionViewItem::decorationAlignment
This variable holds the alignment of the decoration for the item
The default value is Qt::AlignLeft.
QStyleOptionViewItem::Position QStyleOptionViewItem::decorationPosition
This variable holds the position of the decoration for the item
The default value is Left.
See also Position.
QSize QStyleOptionViewItem::decorationSize
This variable holds the size of the decoration for the item
The default value is QSize(-1, -1), i.e. an invalid size.
See also decorationAlignment and decorationPosition.
Qt::Alignment QStyleOptionViewItem::displayAlignment
This variable holds the alignment of the display value for the item
The default value is Qt::AlignLeft.
QStyleOptionViewItem::ViewItemFeatures QStyleOptionViewItem::features
This variable holds a bitwise OR of the features that describe this view item
See also ViewItemFeature.
QFont QStyleOptionViewItem::font
This variable holds the font used for the item
By default, the application's default font is used.
See also QFont.
QIcon QStyleOptionViewItem::icon
The icon (if any) to be drawn in the view item.
QModelIndex QStyleOptionViewItem::index
The model index that is to be drawn.
bool QStyleOptionViewItem::showDecorationSelected
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.
See also QStyle::SH_ItemView_ShowDecorationSelected and QAbstractItemView.
QString QStyleOptionViewItem::text
The text (if any) to be drawn in the view item.
Qt::TextElideMode QStyleOptionViewItem::textElideMode
5'4 Cm
where ellipsis should be added for text that is too long to fit into an item
The default value is Qt::ElideMiddle, i.e. the ellipsis appears in the middle of the text.
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See also Qt::TextElideMode and QStyle::SH_ItemView_EllipsisLocation.
QStyleOptionViewItem::ViewItemPosition QStyleOptionViewItem::viewItemPosition
Gives the position of this view item relative to other items. See the ViewItemPosition enum for the details.
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