Wt  3.3.9
Public Types | Public Member Functions | List of all members
Wt::WContainerWidget Class Reference

A widget that holds and manages child widgets. More...

#include <Wt/WContainerWidget>

Inheritance diagram for Wt::WContainerWidget:
Inheritance graph
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Public Types

- Public Types inherited from Wt::WObject
typedef void(WObject::* Method) ()
 Typedef for a WObject method without arguments.
 

Public Member Functions

 WContainerWidget (WContainerWidget *parent=0)
 Creates a container with optional parent.
 
 ~WContainerWidget ()
 Destructor.
 
void setLayout (WLayout *layout)
 Sets a layout manager for the container. More...
 
void setLayout (WLayout *layout, WFlags< AlignmentFlag > alignment)
 Sets a layout manager for the container (deprecated). More...
 
WLayoutlayout ()
 Returns the layout manager that was set for the container. More...
 
virtual void addWidget (WWidget *widget)
 Adds a child widget to this container. More...
 
virtual void insertBefore (WWidget *widget, WWidget *before)
 Inserts a child widget in this container, before another widget. More...
 
virtual void insertWidget (int index, WWidget *widget)
 Inserts a child widget in this container at given index. More...
 
virtual void removeWidget (WWidget *widget)
 Removes a child widget from this container. More...
 
virtual void clear ()
 Removes and deletes all child widgets. More...
 
virtual int indexOf (WWidget *widget) const
 Returns the index of a widget.
 
virtual WWidgetwidget (int index) const
 Returns the widget at index
 
virtual int count () const
 Returns the number of widgets in this container.
 
void setContentAlignment (WFlags< AlignmentFlag > contentAlignment)
 Specifies how child widgets must be aligned within the container. More...
 
void setPadding (const WLength &padding, WFlags< Side > sides=All)
 Sets padding inside the widget. More...
 
WLength padding (Side side) const
 Returns the padding set for the widget. More...
 
WFlags< AlignmentFlagcontentAlignment () const
 Returns the alignment of children. More...
 
void setOverflow (Overflow overflow, WFlags< Orientation > orientation=(Horizontal|Vertical))
 Sets how overflow of contained children must be handled. More...
 
void setList (bool list, bool ordered=false)
 Renders the container as an HTML list. More...
 
bool isList () const
 Returns if this container is rendered as a List. More...
 
bool isUnorderedList () const
 Returns if this container is rendered as an Unordered List. More...
 
bool isOrderedList () const
 Returns if this container is rendered as an Ordered List. More...
 
EventSignal< WScrollEvent > & scrolled ()
 Event signal emitted when scrolling in the widget. More...
 
int scrollTop () const
 return the number of pixels the container is scrolled horizontally More...
 
int scrollLeft () const
 return the number of pixels the container is scrolled vertically More...
 
- Public Member Functions inherited from Wt::WInteractWidget
 WInteractWidget (WContainerWidget *parent=0)
 Create an InteractWidget with optional parent.
 
EventSignal< WKeyEvent > & keyWentDown ()
 Event signal emitted when a keyboard key is pushed down. More...
 
EventSignal< WKeyEvent > & keyPressed ()
 Event signal emitted when a "character" was entered. More...
 
EventSignal< WKeyEvent > & keyWentUp ()
 Event signal emitted when a keyboard key is released. More...
 
EventSignalenterPressed ()
 Event signal emitted when enter was pressed. More...
 
EventSignalescapePressed ()
 Event signal emitted when escape was pressed. More...
 
EventSignal< WMouseEvent > & clicked ()
 Event signal emitted when a mouse key was clicked on this widget. More...
 
EventSignal< WMouseEvent > & doubleClicked ()
 Event signal emitted when a mouse key was double clicked on this widget. More...
 
EventSignal< WMouseEvent > & mouseWentDown ()
 Event signal emitted when a mouse key was pushed down on this widget. More...
 
EventSignal< WMouseEvent > & mouseWentUp ()
 Event signal emitted when a mouse key was released on this widget. More...
 
EventSignal< WMouseEvent > & mouseWentOut ()
 Event signal emitted when the mouse went out of this widget. More...
 
EventSignal< WMouseEvent > & mouseWentOver ()
 Event signal emitted when the mouse entered this widget. More...
 
EventSignal< WMouseEvent > & mouseMoved ()
 Event signal emitted when the mouse moved over this widget. More...
 
EventSignal< WMouseEvent > & mouseDragged ()
 Event signal emitted when the mouse is dragged over this widget. More...
 
EventSignal< WMouseEvent > & mouseWheel ()
 Event signal emitted when the mouse scroll wheel was used. More...
 
EventSignal< WTouchEvent > & touchStarted ()
 Event signal emitted when a finger is placed on the screen. More...
 
EventSignal< WTouchEvent > & touchEnded ()
 Event signal emitted when a finger is removed from the screen. More...
 
EventSignal< WTouchEvent > & touchMoved ()
 Event signal emitted when a finger, which is already placed on the screen, is moved across the screen. More...
 
EventSignal< WGestureEvent > & gestureStarted ()
 Event signal emitted when a gesture is started. More...
 
EventSignal< WGestureEvent > & gestureChanged ()
 Event signal emitted when a gesture is changed. More...
 
EventSignal< WGestureEvent > & gestureEnded ()
 Event signal emitted when a gesture is ended. More...
 
void setDraggable (const std::string &mimeType, WWidget *dragWidget=0, bool isDragWidgetOnly=false, WObject *sourceWidget=0)
 Configure dragging for drag and drop. More...
 
void unsetDraggable ()
 Disable drag & drop for this widget. More...
 
void setMouseOverDelay (int delay)
 Sets a delay for the mouse over event. More...
 
int mouseOverDelay () const
 Returns the mouse over signal delay. More...
 
virtual void setPopup (bool popup)
 Lets the widget overlay over other sibling widgets. More...
 
virtual void load ()
 Loads content just before the widget is used. More...
 
virtual bool isEnabled () const
 Returns whether the widget is enabled. More...
 
- Public Member Functions inherited from Wt::WWebWidget
 WWebWidget (WContainerWidget *parent=0)
 Construct a WebWidget with a given parent. More...
 
virtual void setPositionScheme (PositionScheme scheme)
 Sets the CSS position scheme. More...
 
virtual PositionScheme positionScheme () const
 Returns the CSS position scheme. More...
 
virtual void setOffsets (const WLength &offset, WFlags< Side > sides=All)
 Sets CSS offsets for a non-statically positioned widget. More...
 
virtual WLength offset (Side s) const
 Returns a CSS offset. More...
 
virtual void resize (const WLength &width, const WLength &height)
 Resizes the widget. More...
 
virtual WLength width () const
 Returns the width. More...
 
virtual WLength height () const
 Returns the height. More...
 
virtual void setMinimumSize (const WLength &width, const WLength &height)
 Sets a minimum size. More...
 
virtual WLength minimumWidth () const
 Returns the minimum width. More...
 
virtual WLength minimumHeight () const
 Returns the minimum height. More...
 
virtual void setMaximumSize (const WLength &width, const WLength &height)
 Sets a maximum size. More...
 
virtual WLength maximumWidth () const
 Returns the maximum width. More...
 
virtual WLength maximumHeight () const
 Returns the maximum height. More...
 
virtual void setLineHeight (const WLength &height)
 Sets the CSS line height for contained text.
 
virtual WLength lineHeight () const
 Returns the CSS line height for contained text. More...
 
virtual void setFloatSide (Side s)
 Specifies a CSS float side. More...
 
virtual Side floatSide () const
 Returns the CSS float side. More...
 
virtual void setClearSides (WFlags< Side > sides)
 Sets the sides that should be cleared of floats. More...
 
virtual WFlags< SideclearSides () const
 Returns the sides that should remain empty. More...
 
virtual void setMargin (const WLength &margin, WFlags< Side > sides=All)
 Sets CSS margins around the widget. More...
 
virtual WLength margin (Side side) const
 Returns a CSS margin set. More...
 
virtual void setHiddenKeepsGeometry (bool enabled)
 Sets whether the widget keeps its geometry when hidden. More...
 
virtual bool hiddenKeepsGeometry () const
 Returns whether the widget keeps its geometry when hidden. More...
 
virtual void setHidden (bool hidden, const WAnimation &animation=WAnimation())
 Hides or shows the widget. More...
 
virtual bool isHidden () const
 Returns whether the widget is set hidden. More...
 
virtual bool isVisible () const
 Returns whether the widget is visible. More...
 
virtual void setDisabled (bool disabled)
 Sets whether the widget is disabled. More...
 
virtual bool isDisabled () const
 Returns whether the widget is set disabled. More...
 
virtual bool isPopup () const
 Returns whether the widget is overlayed. More...
 
virtual void setInline (bool isInline)
 Sets whether the widget is displayed inline or as a block. More...
 
virtual bool isInline () const
 Returns whether the widget is displayed inline or as block. More...
 
virtual void setDecorationStyle (const WCssDecorationStyle &style)
 Sets a CSS decoration style. More...
 
virtual WCssDecorationStyledecorationStyle ()
 Returns the decoration style of this widget. More...
 
virtual void setStyleClass (const WString &styleClass)
 Sets (one or more) CSS style classes. More...
 
virtual WString styleClass () const
 Returns the CSS style class. More...
 
virtual void addStyleClass (const WString &styleClass, bool force=false)
 Adds a CSS style class. More...
 
virtual void removeStyleClass (const WString &styleClass, bool force=false)
 Removes a CSS style class. More...
 
virtual bool hasStyleClass (const WString &styleClass) const
 Returns whether the widget has a style class.
 
virtual void setVerticalAlignment (AlignmentFlag alignment, const WLength &length=WLength())
 Sets the vertical alignment. More...
 
virtual AlignmentFlag verticalAlignment () const
 Returns the vertical alignment. More...
 
virtual WLength verticalAlignmentLength () const
 Returns the fixed vertical alignment that was set. More...
 
virtual void setToolTip (const WString &text, TextFormat textFormat=PlainText)
 Sets a tooltip. More...
 
virtual void setDeferredToolTip (bool enable, TextFormat textFormat=PlainText)
 Enable deferred tooltip. More...
 
virtual WString toolTip () const
 Returns the tooltip.
 
virtual void refresh ()
 Refresh the widget. More...
 
virtual void setAttributeValue (const std::string &name, const WString &value)
 Sets an attribute value. More...
 
virtual WString attributeValue (const std::string &name) const
 Returns an attribute value. More...
 
virtual void setJavaScriptMember (const std::string &name, const std::string &value)
 Sets a JavaScript member. More...
 
virtual std::string javaScriptMember (const std::string &name) const
 Returns the value of a JavaScript member. More...
 
virtual void callJavaScriptMember (const std::string &name, const std::string &args)
 Calls a JavaScript member. More...
 
virtual bool loaded () const
 Returns whether this widget has been loaded. More...
 
virtual void setId (const std::string &id)
 Sets the CSS Id. More...
 
virtual WWidgetfind (const std::string &name)
 Finds a descendent widget by name. More...
 
virtual WWidgetfindById (const std::string &id)
 Finds a descendent widget by id.
 
virtual void setSelectable (bool selectable)
 Sets as selectable. More...
 
virtual void doJavaScript (const std::string &javascript)
 Executes the given JavaScript statements when the widget is rendered or updated. More...
 
virtual const std::string id () const
 Returns the (unique) identifier for this object. More...
 
void setLoadLaterWhenInvisible (bool)
 Change the way the widget is loaded when invisible. More...
 
std::string htmlTagName () const
 returns the current html tag name More...
 
void setHtmlTagName (const std::string &tag)
 set the custom HTML tag name More...
 
const std::vector< WWidget * > & children () const
 Returns contained widgets. More...
 
SignalchildrenChanged ()
 Signal emitted when children have been added or removed. More...
 
virtual void setCanReceiveFocus (bool enabled)
 Sets whether the widget can receive focus. More...
 
virtual bool canReceiveFocus () const
 Returns whether the widget can receive focus. More...
 
virtual bool setFirstFocus ()
 Set focus on the widget's first descendant. More...
 
virtual void setFocus (bool focus)
 Sets focus. More...
 
virtual bool hasFocus () const
 Returns whether the widget currently has the focus.
 
virtual void setTabIndex (int index)
 Sets the tab index. More...
 
virtual int tabIndex () const
 Returns the tab index. More...
 
EventSignalblurred ()
 Signal emitted when the widget lost focus. More...
 
EventSignalfocussed ()
 Signal emitted when the widget recieved focus. More...
 
virtual bool scrollVisibilityEnabled () const WT_CXX11ONLY(finaloverride)
 Returns whether scroll visibility detection is enabled for this widget. More...
 
virtual void setScrollVisibilityEnabled (bool enabled) WT_CXX11ONLY(finaloverride)
 Sets whether scroll visibility detection is enabled for this widget. More...
 
virtual int scrollVisibilityMargin () const WT_CXX11ONLY(finaloverride)
 Returns the margin around the viewport within which the widget is considered visible. More...
 
virtual void setScrollVisibilityMargin (int margin) WT_CXX11ONLY(finaloverride)
 Sets the margin around the viewport within which the widget is considered visible. More...
 
virtual Signal< bool > & scrollVisibilityChanged () WT_CXX11ONLY(finaloverride)
 Signal triggered when the scroll visibility of this widget changes. More...
 
virtual bool isScrollVisible () const WT_CXX11ONLY(finaloverride)
 Returns whether this widget is currently considered scroll visible. More...
 
virtual void setThemeStyleEnabled (bool enabled)
 Sets whether theme styling for a widget is enabled or disabled. More...
 
virtual bool isThemeStyleEnabled () const
 Returns whether this widget is currently styled by the chosen theme. More...
 
- Public Member Functions inherited from Wt::WWidget
virtual ~WWidget ()
 Destructor. More...
 
WWidgetparent () const
 Returns the parent widget. More...
 
virtual void removeChild (WObject *child)
 Removes a child object. More...
 
void setWidth (const WLength &width)
 Sets the width. More...
 
void setHeight (const WLength &height)
 Sets the height. More...
 
virtual void positionAt (const WWidget *widget, Orientation orientation=Vertical)
 Positions a widget next to another widget. More...
 
virtual void toggleStyleClass (const WString &styleClass, bool add, bool force=false)
 Toggles a CSS style class.
 
std::string jsRef () const
 Returns a JavaScript expression to the corresponding DOM node. More...
 
void setFocus ()
 Sets focus. More...
 
virtual void acceptDrops (const std::string &mimeType, const WString &hoverStyleClass=WString())
 Sets a mime type to be accepted for dropping. More...
 
virtual void stopAcceptDrops (const std::string &mimeType)
 Indicates that a mime type is no longer accepted for dropping. More...
 
virtual void setObjectName (const std::string &name)
 Sets an object name. More...
 
virtual void htmlText (std::ostream &out)
 Streams the (X)HTML representation. More...
 
bool isRendered () const
 Returns whether the widget is rendered. More...
 
void hide ()
 Hides the widget. More...
 
void animateHide (const WAnimation &animation)
 Hides the widget using an animation. More...
 
void show ()
 Shows the widget. More...
 
void animateShow (const WAnimation &animation)
 Shows the widget using an animation. More...
 
void enable ()
 Enables the widget. More...
 
void disable ()
 Disable thes widget. More...
 
bool layoutSizeAware () const
 Returns whether the widget is layout size aware. More...
 
- Public Member Functions inherited from Wt::WObject
 WObject (WObject *parent=0)
 Create a WObject with a given parent object. More...
 
virtual ~WObject ()
 Destructor. More...
 
virtual std::string objectName () const
 Returns the object name. More...
 
void resetLearnedSlots ()
 Resets learned stateless slot implementations. More...
 
template<class T >
void resetLearnedSlot (void(T::*method)())
 Resets a learned stateless slot implementation. More...
 
template<class T >
WStatelessSlot * implementStateless (void(T::*method)())
 Declares a slot to be stateless and learn client-side behaviour on first invocation. More...
 
template<class T >
WStatelessSlot * implementStateless (void(T::*method)(), void(T::*undoMethod)())
 Declares a slot to be stateless and learn client-side behaviour in advance. More...
 
void isNotStateless ()
 Marks the current function as not stateless. More...
 
template<class T >
WStatelessSlot * implementJavaScript (void(T::*method)(), const std::string &jsCode)
 Provides a JavaScript implementation for a method. More...
 
void addChild (WObject *child)
 Adds a child object. More...
 
const std::vector< WObject * > & children () const
 Returns the children.
 
WObjectparent () const
 Returns the parent object.
 

Additional Inherited Members

- Static Public Member Functions inherited from Wt::WWebWidget
static WString escapeText (const WString &text, bool newlinesToo=false)
 Escape HTML control characters in the text, to display literally (deprecated). More...
 
static std::string & escapeText (std::string &text, bool newlinestoo=false)
 Escape HTML control characters in the text, to display literally (deprecated). More...
 
static bool removeScript (WString &text)
 Remove tags/attributes from text that are not passive (deprecated). More...
 
static std::string jsStringLiteral (const std::string &v, char delimiter= '\'')
 Turn a UTF8 encoded string into a JavaScript string literal. More...
 
- Static Public Member Functions inherited from Wt::WWidget
static WString tr (const char *key)
 Short hand for WString::tr() More...
 
- Protected Member Functions inherited from Wt::WInteractWidget
virtual void propagateSetEnabled (bool enabled)
 Propagates that a widget was enabled or disabled through children. More...
 
- Protected Member Functions inherited from Wt::WWebWidget
virtual void enableAjax ()
 Progresses to an Ajax-enabled widget. More...
 
virtual WStatelessSlot * getStateless (Method method)
 On-demand stateless slot implementation. More...
 
virtual void render (WFlags< RenderFlag > flags)
 Renders the widget. More...
 
- Protected Member Functions inherited from Wt::WWidget
void setLayoutSizeAware (bool sizeAware)
 Sets the widget to be aware of its size set by a layout manager. More...
 
virtual void layoutSizeChanged (int width, int height)
 Virtual method that indicates a size change. More...
 
 WWidget (WContainerWidget *parent=0)
 Creates a widget. More...
 
virtual void dropEvent (WDropEvent dropEvent)
 Handles a drop event. More...
 
virtual int boxPadding (Orientation orientation) const
 Returns the widget's built-in padding. More...
 
virtual int boxBorder (Orientation orientation) const
 Returns the widget's built-in border width. More...
 
void scheduleRender (WFlags< RepaintFlag > flags=0)
 Schedules rerendering of the widget. More...
 
- Static Protected Member Functions inherited from Wt::WObject
static WObjectsender ()
 Returns the sender of the current slot call. More...
 

Detailed Description

A widget that holds and manages child widgets.

A WContainerWidget acts as a container for child widgets. Child widgets may be added directly to the container or using a layout manager.

Use addWidget() or pass the container as constructor argument to a widget to directly add children to the container, without using a layout manager. In that case, CSS-based layout is used, and the resulting display is determined by properties of the children and the container. By default, a WContainerWidget is displayed as a block and manages its children within a rectangle. Inline child widgets are layed out in lines, wrapping around as needed, while block child widgets are stacked vertically. The container may add padding at the container edges using setPadding(), and provide alignment of contents using setContentAlignment(). A container is rendered by default using a HTML div tag, but this may be changed to an HTML ul or ol tag to make use of other CSS layout techniques, using setList(). In addition, specializations of this class as implemented by WAnchor, WGroupBox, WStackedWidget and WTableCell provide other alternative rendering of the container.

When setting the WContainerWidget inline the container only acts as a conceptual container, offering a common style to its children. Inline children are still layed out inline within the flow of the parent container of this container, as if they were inserted directly into that parent container. Block children are then not allowed (according to the HTML specification).

To use a layout manager instead of CSS-based layout, use setLayout() or pass the container as constructor argument to a layout manager. In that case you should not define any padding for the container, and widgets and nested layout managers must be added to the layout manager, instead of to the container directly.

Usage example:

// Example 1:
// Instantiate a container widget and add some children whose layout
// is governed based on HTML/CSS rules.
container1->addWidget(new Wt::WText("Some text"));
container1->addWidget(new Wt::WImage("images/img.png"));
Wt::WContainerWidget *child3 = new Wt::WContainerWidget(container1);
// Example 2:
// Instantiate a container widget which uses a layout manager
container2->resize(WLength::Auto, 600); // give the container a fixed height.
layout->addWidget(new Wt::WText("Some text"));
layout->addWidget(new Wt::WImage("images/img.png"));
container2->setLayout(layout); // set the layout to the container.

When using a layout manager, you need to carefully consider the alignment of the layout manager with respect to the container: when the container's height is unconstrained (not specified explicitly using resize() or a style class, and the container is not included in a layout manager), you should pass AlignTop to setLayout().

CSS

Depending on its configuration and usage, the widget corresponds to the following HTML tags:

This widget does not provide styling, and can be styled using inline or external CSS as appropriate.

Member Enumeration Documentation

How to handle overflow of inner content.

Enumerator
OverflowVisible 

Show content that overflows.

OverflowAuto 

Show scrollbars when needed.

OverflowHidden 

Hide content that overflows.

OverflowScroll 

Always show scroll bars.

Member Function Documentation

void Wt::WContainerWidget::addWidget ( WWidget widget)
virtual

Adds a child widget to this container.

This is equivalent to passing this container as the parent when constructing the child. The widget is appended to the list of children, and thus also layed-out at the end.

Reimplemented in Wt::Ext::Splitter, and Wt::WStackedWidget.

void Wt::WContainerWidget::clear ( )
virtual

Removes and deletes all child widgets.

This deletes all children that have been added to this container.

If a layout was set, also the layout manager is deleted.

WFlags<AlignmentFlag> Wt::WContainerWidget::contentAlignment ( ) const

Returns the alignment of children.

See also
setContentAlignment(WFlags<AlignmentFlag>)
void Wt::WContainerWidget::insertBefore ( WWidget widget,
WWidget before 
)
virtual

Inserts a child widget in this container, before another widget.

The widget is inserted at the place of the before widget, and subsequent widgets are shifted.

See also
insertWidget(int index, WWidget *widget);

Reimplemented in Wt::Ext::Splitter.

void Wt::WContainerWidget::insertWidget ( int  index,
WWidget widget 
)
virtual

Inserts a child widget in this container at given index.

The widget is inserted at the given index, and subsequent widgets are shifted.

See also
insertBefore(WWidget *widget, WWidget *before);

Reimplemented in Wt::Ext::Splitter, and Wt::WStackedWidget.

bool Wt::WContainerWidget::isList ( ) const

Returns if this container is rendered as a List.

See also
setList(), isOrderedList(), isUnorderedList()
bool Wt::WContainerWidget::isOrderedList ( ) const

Returns if this container is rendered as an Ordered List.

See also
setList(), isList(), isUnorderedList()
bool Wt::WContainerWidget::isUnorderedList ( ) const

Returns if this container is rendered as an Unordered List.

See also
setList(), isList(), isOrderedList()
WLayout* Wt::WContainerWidget::layout ( )
virtual

Returns the layout manager that was set for the container.

If no layout manager was previously set using setLayout(WLayout *), 0 is returned.

See also
setLayout(WLayout *)

Reimplemented from Wt::WWidget.

WLength Wt::WContainerWidget::padding ( Side  side) const

Returns the padding set for the widget.

See also
setPadding(const WLength&, WFlags<Side>)
void Wt::WContainerWidget::removeWidget ( WWidget widget)
virtual

Removes a child widget from this container.

This removes the widget from this container, but does not delete the widget !

EventSignal< WScrollEvent > & Wt::WContainerWidget::scrolled ( )

Event signal emitted when scrolling in the widget.

This event is emitted when the user scrolls in the widget (for setting the scroll bar policy, see setOverflow()). The event conveys details such as the new scroll bar position, the total contents height and the current widget height.

See also
setOverflow()
int Wt::WContainerWidget::scrollLeft ( ) const

return the number of pixels the container is scrolled vertically

This value is only set if setOverflow() has been called

See also
setOverflow()
scrollTop();
int Wt::WContainerWidget::scrollTop ( ) const

return the number of pixels the container is scrolled horizontally

This value is only set if setOverflow() has been called

See also
setOverflow()
scrollLeft();
void Wt::WContainerWidget::setContentAlignment ( WFlags< AlignmentFlag contentAlignment)

Specifies how child widgets must be aligned within the container.

For a WContainerWidget, only specifes the horizontal alignment of child widgets. Note that there is no way to specify vertical alignment: children are always pushed to the top of the container.

For a WTableCell, this may also specify the vertical alignment. The default alignment is (Wt::AlignTop | Wt::AlignLeft).

void Wt::WContainerWidget::setLayout ( WLayout layout)
virtual

Sets a layout manager for the container.

Note that you can nest layout managers inside each other, to create a complex layout hierarchy.

If a previous layout manager was already set, it is first deleted. In that case, you will need to make sure that you either readd all widgets that were part of the previous layout to the new layout, or delete them, to avoid memory leaks.

See also
layout()

Reimplemented from Wt::WWidget.

void Wt::WContainerWidget::setLayout ( WLayout layout,
WFlags< AlignmentFlag alignment 
)

Sets a layout manager for the container (deprecated).

The alignment argument determines how the layout is aligned inside the container. By default, the layout manager arranges children over the entire width and height of the container, corresponding to a value of AlignJustify.

In general, alignment is the logical OR of a horizontal and a vertical flag:

When using a horizontal alignment different from Wt::AlignJustify, and a vertical alignment different from '0', the widget is sized in that direction to fit the contents, instead of the contents being adjusted to the widget size. This is useful when the container does not have a specific size in that direction and when the layout manager does not contain any widgets that wish to consume all remaining space in that direction.

The widget will take ownership of layout.

Deprecated:
using setLayout() instead, use spacers or a nested layout to control the overall alignment of the layout contents within the container, and use setMaximumSize() (if needed) to let the layout contents determine the size of the container.
See also
layout()
void Wt::WContainerWidget::setList ( bool  list,
bool  ordered = false 
)

Renders the container as an HTML list.

Setting renderList to true will cause the container to be using an HTML <ul> or <ol> type, depending on the value of orderedList. This must be set before the initial render of the container. When set, any contained WContainerWidget will be rendered as an HTML <li>. Adding non-WContainerWidget children results in unspecified behaviour.

Note that CSS default layout rules for <ul> and <ol> add margin and padding to the container, which may look odd if you do not use bullets.

By default, a container is rendered using a <div> element.

See also
isList(), isOrderedList(), isUnorderedList()
void Wt::WContainerWidget::setOverflow ( Overflow  overflow,
WFlags< Orientation orientation = (Horizontal | Vertical) 
)

Sets how overflow of contained children must be handled.

This is an alternative (CSS-ish) way to configure scroll bars on a container widget, compared to wrapping inside a WScrollArea.

Unlike WScrollArea, horizontal scrolling does not work reliably when the container widget is inserted in a layout manager: the layout manager will overflow rather than use scrollbars for this container widget. A solution then is to use WScrollArea instead.

See also
WScrollArea
void Wt::WContainerWidget::setPadding ( const WLength padding,
WFlags< Side sides = All 
)

Sets padding inside the widget.

Setting padding has the effect of adding distance between the widget children and the border.


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