QSplitter class implements a splitter widget. 更多...
| 头： | #include <QSplitter> |
| qmake: | QT += widgets |
| 继承： | QFrame |
| QSplitter (QWidget * parent = Q_NULLPTR) | |
| QSplitter (Qt::Orientation orientation , QWidget * parent = Q_NULLPTR) | |
| ~QSplitter () | |
| void | addWidget (QWidget * widget ) |
| bool | childrenCollapsible () const |
| int | count () const |
| void | getRange (int index , int * min , int * max ) const |
| QSplitterHandle * | handle (int index ) const |
| int | handleWidth () const |
| int | indexOf (QWidget * widget ) const |
| void | insertWidget (int index , QWidget * widget ) |
| bool | isCollapsible (int index ) const |
| bool | opaqueResize () const |
| Qt::Orientation | orientation () const |
| void | refresh () |
| QWidget * | replaceWidget (int index , QWidget * widget ) |
| bool | restoreState (const QByteArray & state ) |
| QByteArray | saveState () const |
| void | setChildrenCollapsible ( bool ) |
| void | setCollapsible (int index , bool collapse ) |
| void | setHandleWidth ( int ) |
| void | setOpaqueResize (bool opaque = true) |
| void | setOrientation ( Qt::Orientation ) |
| void | setSizes (const QList<int> & list ) |
| void | setStretchFactor (int index , int stretch ) |
| QList<int> | sizes () const |
| QWidget * | widget (int index ) const |
| virtual QSize | minimumSizeHint () const |
| virtual QSize | sizeHint () const |
| void | splitterMoved (int pos , int index ) |
| int | closestLegalPosition (int pos , int index ) |
| virtual QSplitterHandle * | createHandle () |
| void | moveSplitter (int pos , int index ) |
| void | setRubberBand (int pos ) |
| virtual void | changeEvent (QEvent * ev ) |
| virtual void | childEvent (QChildEvent * c ) |
| virtual bool | event (QEvent * e ) |
| virtual void | resizeEvent ( QResizeEvent * ) |
QSplitter class implements a splitter widget.
A splitter lets the user control the size of child widgets by dragging the boundary between them. Any number of widgets may be controlled by a single splitter. The typical use of a QSplitter is to create several widgets and add them using insertWidget () 或 addWidget ().
以下范例将展示 QListView , QTreeView ，和 QTextEdit 并排，采用 2 个分割器手柄：
QSplitter *splitter = new QSplitter(parent);
QListView *listview = new QListView;
QTreeView *treeview = new QTreeView;
QTextEdit *textedit = new QTextEdit;
splitter->addWidget(listview);
splitter->addWidget(treeview);
splitter->addWidget(textedit);
If a widget is already inside a QSplitter when insertWidget () 或 addWidget () is called, it will move to the new position. This can be used to reorder widgets in the splitter later. You can use indexOf (), widget ()，和 count () to get access to the widgets inside the splitter.
A default QSplitter lays out its children horizontally (side by side); you can use setOrientation ( Qt::Vertical ) to lay its children out vertically.
By default, all widgets can be as large or as small as the user wishes, between the minimumSizeHint () (or minimumSize ()) and maximumSize () of the widgets.
QSplitter resizes its children dynamically by default. If you would rather have QSplitter resize the children only at the end of a resize operation, call setOpaqueResize (false).
The initial distribution of size between the widgets is determined by multiplying the initial size with the stretch factor. You can also use setSizes () to set the sizes of all the widgets. The function sizes () returns the sizes set by the user. Alternatively, you can save and restore the sizes of the widgets from a QByteArray 使用 saveState () 和 restoreState () respectively.
When you hide () a child, its space will be distributed among the other children. It will be reinstated when you show () it again.
注意： 添加 QLayout 到 QSplitter is not supported (either through setLayout () or making the QSplitter a parent of the QLayout )；使用 addWidget () 代替 (见以上范例)。
另请参阅 QSplitterHandle , QHBoxLayout , QVBoxLayout ，和 QTabWidget .
This property holds whether child widgets can be resized down to size 0 by the user
By default, children are collapsible. It is possible to enable and disable the collapsing of individual children using setCollapsible ().
访问函数：
| bool | childrenCollapsible () const |
| void | setChildrenCollapsible ( bool ) |
另请参阅 setCollapsible ().
此特性保持分割器手柄的宽度
By default, this property contains a value that depends on the user's platform and style preferences.
If you set handleWidth to 1 or 0, the actual grab area will grow to overlap a few pixels of its respective widgets.
访问函数：
| int | handleWidth () const |
| void | setHandleWidth ( int ) |
This property holds whether resizing is opaque
默认重置尺寸行为从属样式 (由 SH_Splitter_OpaqueResize 样式提示确定)。不管怎样，可以覆盖它通过调用 setOpaqueResize()
访问函数：
| bool | opaqueResize () const |
| void | setOpaqueResize (bool opaque = true) |
另请参阅 QStyle::StyleHint .
此特性保持分割器的取向
By default, the orientation is horizontal (i.e., the widgets are laid out side by side). The possible orientations are Qt::Horizontal and Qt::Vertical .
访问函数：
| Qt::Orientation | orientation () const |
| void | setOrientation ( Qt::Orientation ) |
另请参阅 QSplitterHandle::orientation ().
构造水平分割器采用 parent argument passed on to the QFrame 构造函数。
另请参阅 setOrientation ().
构造分割器采用给定 orientation and parent .
另请参阅 setOrientation ().
销毁分割器。删除所有子级。
添加给定 widget 到分割器布局在所有其它项之后。
若 widget 已在分割器中，它将被移动到新位置。
注意： 分割器拥有 Widget 的所有权。
另请参阅 insertWidget (), widget ()，和 indexOf ().
[virtual protected]
void
QSplitter::
changeEvent
(
QEvent
*
ev
)
重实现自 QWidget::changeEvent ().
[virtual protected]
void
QSplitter::
childEvent
(
QChildEvent
*
c
)
重实现自 QObject::childEvent ().
Tells the splitter that the child widget described by c has been inserted or removed.
This method is also used to handle the situation where a widget is created with the splitter as a parent but not explicitly added with insertWidget () 或 addWidget (). This is for compatibility and not the recommended way of putting widgets into a splitter in new code. Please use insertWidget () 或 addWidget () in new code.
另请参阅 addWidget () 和 insertWidget ().
[protected]
int
QSplitter::
closestLegalPosition
(
int
pos
,
int
index
)
Returns the closest legal position to pos of the widget at index .
For right-to-left languages such as Arabic and Hebrew, the layout of horizontal splitters is reversed. Positions are then measured from the right edge of the widget.
另请参阅 getRange ().
返回分割器布局所包含的 Widget 数。
[virtual protected]
QSplitterHandle
*QSplitter::
createHandle
()
Returns a new splitter handle as a child widget of this splitter. This function can be reimplemented in subclasses to provide support for custom handles.
[virtual protected]
bool
QSplitter::
event
(
QEvent
*
e
)
重实现自 QObject::event ().
Returns the valid range of the splitter at index in * min 和 * max if min and max are not 0.
Returns the handle to the left (or above) for the item in the splitter's layout at the given index . The handle at index 0 is always hidden.
For right-to-left languages such as Arabic and Hebrew, the layout of horizontal splitters is reversed. The handle will be to the right of the widget at index .
另请参阅 count (), widget (), indexOf (), createHandle ()，和 setHandleWidth ().
Returns the index in the splitter's layout of the specified widget . This also works for handles.
Handles are numbered from 0. There are as many handles as there are child widgets, but the handle at position 0 is always hidden.
插入 widget specified into the splitter's layout at the given index .
若 widget 已在分割器中，它将被移动到新位置。
若 index is an invalid index, then the widget will be inserted at the end.
注意： 分割器拥有 Widget 的所有权。
另请参阅 addWidget (), indexOf ()，和 widget ().
返回
true
若 Widget 在
index
是可折叠的，否则返回
false
.
[virtual]
QSize
QSplitter::
minimumSizeHint
() const
重实现自 QWidget::minimumSizeHint ().
[protected]
void
QSplitter::
moveSplitter
(
int
pos
,
int
index
)
Moves the left or top edge of the splitter handle at index as close as possible to position pos , which is the distance from the left or top edge of the widget.
For right-to-left languages such as Arabic and Hebrew, the layout of horizontal splitters is reversed. pos is then the distance from the right edge of the widget.
另请参阅 splitterMoved (), closestLegalPosition ()，和 getRange ().
Updates the splitter's state. You should not need to call this function.
替换分割器布局中的 Widget 在给定 index by widget .
返回刚才被替换的 Widget 若 index 有效和 widget 尚不是分割器子级。否则，它返回 null 且不置换或添加。
新近插入 Widget 的几何体如同它替换的小部件。它可见和折叠状态也会被继承。
注意： 分割器拥有所有权对于 widget 并将替换小部件的父级设为 null。
注意： 因为 widget gets reparented 到分割器，其 geometry 可能不会被立即设置，直到 widget 接收适当事件。
该函数在 Qt 5.9 引入。
另请参阅 insertWidget () 和 indexOf ().
[virtual protected]
void
QSplitter::
resizeEvent
(
QResizeEvent *
)
重实现自 QWidget::resizeEvent ().
将分割器布局还原成
state
指定。返回
true
若状态被还原；否则返回
false
.
通常，这用于结合 QSettings 从过去的会话还原尺寸。这里是范例：
还原分割器的状态：
QSettings settings;
splitter->restoreState(settings.value("splitterSizes").toByteArray());
所提供的字节数组中的数据，无效或过期可能导致无法还原分割器布局。
另请参阅 saveState ().
保存分割器布局的状态。
通常，这用于结合 QSettings 以记住用于未来会议的尺寸。版本号作为数据的一部分被存储。这里是范例：
QSettings settings;
settings.setValue("splitterSizes", splitter->saveState());
另请参阅 restoreState ().
Sets whether the child widget at index is collapsible to collapse .
By default, children are collapsible, meaning that the user can resize them down to size 0, even if they have a non-zero minimumSize () 或 minimumSizeHint (). This behavior can be changed on a per-widget basis by calling this function, or globally for all the widgets in the splitter by setting the childrenCollapsible 特性。
另请参阅 isCollapsible () 和 childrenCollapsible .
[protected]
void
QSplitter::
setRubberBand
(
int
pos
)
Displays a rubber band at position pos 。若 pos is negative, the rubber band is removed.
Sets the child widgets' respective sizes to the values given in the list .
If the splitter is horizontal, the values set the width of each widget in pixels, from left to right. If the splitter is vertical, the height of each widget is set, from top to bottom.
Extra values in the list are ignored. If list contains too few values, the result is undefined, but the program will still be well-behaved.
The overall size of the splitter widget is not affected. Instead, any additional/missing space is distributed amongst the widgets according to the relative weight of the sizes.
If you specify a size of 0, the widget will be invisible. The size policies of the widgets are preserved. That is, a value smaller than the minimal size hint of the respective widget will be replaced by the value of the hint.
另请参阅 sizes ().
Updates the size policy of the widget at position index to have a stretch factor of stretch .
stretch is not the effective stretch factor; the effective stretch factor is calculated by taking the initial size of the widget and multiplying it with stretch .
This function is provided for convenience. It is equivalent to
QWidget *widget = splitter->widget(index); QSizePolicy policy = widget->sizePolicy(); policy.setHorizontalStretch(stretch); policy.setVerticalStretch(stretch); widget->setSizePolicy(policy);
[virtual]
QSize
QSplitter::
sizeHint
() const
重实现自 QWidget::sizeHint ().
返回此分割器所有 Widget 尺寸的参数列表。
若分割器方向水平，列表从左到右包含 Widget 宽度 (以像素为单位)；若方向垂直，列表从顶到下包含 Widget 高度 (以像素为单位)。
将值赋予另一分割器的 setSizes () 函数将产生如此具有相同布局的分割器。
注意：不可见 Widget 拥有 0 尺寸。
另请参阅 setSizes ().
[signal]
void
QSplitter::
splitterMoved
(
int
pos
,
int
index
)
This signal is emitted when the splitter handle at a particular index has been moved to position pos .
For right-to-left languages such as Arabic and Hebrew, the layout of horizontal splitters is reversed. pos is then the distance from the right edge of the widget.
另请参阅 moveSplitter ().
返回 Widget 在给定 index in the splitter's layout.
另请参阅 count (), handle (), indexOf ()，和 insertWidget ().