Wt  4.0.2
Public Member Functions | Protected Member Functions | List of all members
Wt::WPopupMenu Class Reference

A menu presented in a popup window. More...

#include <Wt/WPopupMenu.h>

Inheritance diagram for Wt::WPopupMenu:
Inheritance graph
[legend]

Public Member Functions

 WPopupMenu (WStackedWidget *contentsStack=nullptr)
 Creates a new popup menu. More...
 
void popup (const WPoint &point)
 Shows the the popup at a position. More...
 
void popup (const WMouseEvent &event)
 Shows the the popup at the location of a mouse event. More...
 
void popup (WWidget *location, Orientation orientation=Orientation::Vertical)
 Shows the popup besides a widget. More...
 
WMenuItemexec (const WPoint &point)
 Executes the the popup at a position. More...
 
WMenuItemexec (const WMouseEvent &event)
 Executes the the popup at the location of a mouse event. More...
 
WMenuItemexec (WWidget *location, Orientation orientation=Orientation::Vertical)
 Executes the popup besides a widget. More...
 
WMenuItemresult () const
 Returns the last triggered menu item. More...
 
virtual void setHidden (bool hidden, const WAnimation &animation=WAnimation()) override
 Hides or shows the widget. More...
 
virtual void setMaximumSize (const WLength &width, const WLength &height) override
 Sets a maximum size. More...
 
virtual void setMinimumSize (const WLength &width, const WLength &height) override
 Sets a minimum size. More...
 
SignalaboutToHide ()
 Signal emitted when the popup is hidden. More...
 
Signal< WMenuItem * > & triggered ()
 Signal emitted when an item is selected. More...
 
void setAutoHide (bool enabled, int autoHideDelay=0)
 Configure auto-hide when the mouse leaves the menu. More...
 
- Public Member Functions inherited from Wt::WMenu
 WMenu ()
 Creates a new menu. More...
 
 WMenu (WStackedWidget *contentsStack)
 Creates a new menu. More...
 
 ~WMenu ()
 Destructor.
 
WMenuItemaddItem (const WString &label, std::unique_ptr< WWidget > contents=nullptr, ContentLoading policy=ContentLoading::Lazy)
 Adds an item. More...
 
WMenuItemaddItem (const std::string &iconPath, const WString &label, std::unique_ptr< WWidget > contents=nullptr, ContentLoading policy=ContentLoading::Lazy)
 Adds an item. More...
 
template<class T , class V >
WMenuItemaddItem (const WString &text, T *target, void(V::*method)())
 Adds an item with given text, and specify a slot method to be called when the item is triggered. More...
 
template<class T , class V >
WMenuItemaddItem (const std::string &iconPath, const WString &text, T *target, void(V::*method)())
 Adds an item with given text and icon, and specify a slot method to be called when activated. More...
 
WMenuItemaddMenu (const WString &text, std::unique_ptr< WMenu > menu)
 Adds a submenu, with given text. More...
 
WMenuItemaddMenu (const std::string &iconPath, const WString &text, std::unique_ptr< WMenu > menu)
 Adds a submenu, with given icon and text. More...
 
virtual WMenuItemaddItem (std::unique_ptr< WMenuItem > item)
 Adds an item. More...
 
WMenuIteminsertItem (int index, const WString &label, std::unique_ptr< WWidget > contents=nullptr, ContentLoading policy=ContentLoading::Lazy)
 inserts an item. More...
 
WMenuIteminsertItem (int index, const std::string &iconPath, const WString &label, std::unique_ptr< WWidget > contents=nullptr, ContentLoading policy=ContentLoading::Lazy)
 inserts an item. More...
 
template<class T , class V >
WMenuIteminsertItem (int index, const WString &text, T *target, void(V::*method)())
 inserts an item with given text, and specify a slot method to be called when the item is triggered. More...
 
template<class T , class V >
WMenuIteminsertItem (int index, const std::string &iconPath, const WString &text, T *target, void(V::*method)())
 inserts an item with given text and icon, and specify a slot method to be called when activated. More...
 
WMenuIteminsertMenu (int index, const WString &text, std::unique_ptr< WMenu > menu)
 inserts a submenu, with given text. More...
 
WMenuIteminsertMenu (int index, const std::string &iconPath, const WString &text, std::unique_ptr< WMenu > menu)
 inserts a submenu, with given icon and text. More...
 
virtual WMenuIteminsertItem (int index, std::unique_ptr< WMenuItem > item)
 Inserts an item. More...
 
WMenuItemaddSeparator ()
 Adds a separator to the menu. More...
 
WMenuItemaddSectionHeader (const WString &text)
 Adds a section header to the menu.
 
virtual std::unique_ptr< WMenuItemremoveItem (WMenuItem *item)
 Removes an item. More...
 
void select (WMenuItem *item)
 Selects an item. More...
 
void select (int index)
 Selects an item. More...
 
Signal< WMenuItem * > & itemSelected ()
 Signal which indicates that a new item was selected. More...
 
Signal< WMenuItem * > & itemSelectRendered ()
 Signal which indicates that a new selected item is rendered. More...
 
void close (WMenuItem *item)
 Closes an item. More...
 
void close (int index)
 Closes an item. More...
 
std::vector< WMenuItem * > items () const
 Returns the items. More...
 
Signal< WMenuItem * > & itemClosed ()
 Signal which indicates that an item was closed. More...
 
void setItemHidden (WMenuItem *item, bool hidden)
 Hides an item. More...
 
void setItemHidden (int index, bool hidden)
 Hides an item. More...
 
bool isItemHidden (WMenuItem *item) const
 Returns whether the item widget of the given item is hidden. More...
 
bool isItemHidden (int index) const
 Returns whether the item widget of the given index is hidden. More...
 
void setItemDisabled (WMenuItem *item, bool disabled)
 Disables an item. More...
 
void setItemDisabled (int index, bool disabled)
 Disables an item. More...
 
bool isItemDisabled (WMenuItem *item) const
 Returns whether the item widget of the given item is disabled. More...
 
bool isItemDisabled (int index) const
 Returns whether the item widget of the given index is disabled. More...
 
WMenuItemcurrentItem () const
 Returns the currently selected item. More...
 
int currentIndex () const
 Returns the index of the currently selected item. More...
 
void setInternalPathEnabled (const std::string &basePath="")
 Enables internal paths for items. More...
 
bool internalPathEnabled () const
 Returns whether the menu generates internal paths entries. More...
 
void setInternalBasePath (const std::string &basePath)
 Sets the internal base path. More...
 
const std::string & internalBasePath () const
 Returns the internal base path. More...
 
WStackedWidgetcontentsStack () const
 Returns the contents stack associated with the menu.
 
int count () const
 Returns the item count.
 
WMenuItemitemAt (int index) const
 Returns the item by index. More...
 
int indexOf (WMenuItem *item) const
 Returns the index of an item. More...
 
WMenuItemparentItem () const
 Returns the parent item (for a submenu) More...
 
virtual void load () override
 Loads content just before the widget is used. More...
 
- Public Member Functions inherited from Wt::WCompositeWidget
 WCompositeWidget ()
 Creates a WCompositeWidget. More...
 
 WCompositeWidget (std::unique_ptr< WWidget > implementation)
 Creates a WCompositeWidget with given implementation. More...
 
virtual std::vector< WWidget * > children () const override
 Returns child widgets. More...
 
virtual std::unique_ptr< WWidgetremoveWidget (WWidget *widget) override
 Removes a child widget.
 
virtual void setObjectName (const std::string &name) override
 Sets an object name. More...
 
virtual std::string objectName () const override
 Returns the object name. More...
 
virtual const std::string id () const override
 Returns the (unique) identifier for this object. More...
 
virtual void setPositionScheme (PositionScheme scheme) override
 Sets the CSS position scheme. More...
 
virtual PositionScheme positionScheme () const override
 Returns the CSS position scheme. More...
 
virtual void setOffsets (const WLength &offset, WFlags< Side > sides=AllSides) override
 Sets CSS offsets for a non-statically positioned widget. More...
 
virtual WLength offset (Side s) const override
 Returns a CSS offset. More...
 
virtual void resize (const WLength &width, const WLength &height) override
 Resizes the widget. More...
 
virtual WLength width () const override
 Returns the width. More...
 
virtual WLength height () const override
 Returns the height. More...
 
virtual WLength minimumWidth () const override
 Returns the minimum width. More...
 
virtual WLength minimumHeight () const override
 Returns the minimum height. More...
 
virtual WLength maximumWidth () const override
 Returns the maximum width. More...
 
virtual WLength maximumHeight () const override
 Returns the maximum height. More...
 
virtual void setLineHeight (const WLength &height) override
 Sets the CSS line height for contained text.
 
virtual WLength lineHeight () const override
 Returns the CSS line height for contained text. More...
 
virtual void setFloatSide (Side s) override
 Specifies a CSS float side. More...
 
virtual Side floatSide () const override
 Returns the CSS float side. More...
 
virtual void setClearSides (WFlags< Side > sides) override
 Sets the sides that should be cleared of floats. More...
 
virtual WFlags< SideclearSides () const override
 Returns the sides that should remain empty. More...
 
virtual void setMargin (const WLength &margin, WFlags< Side > sides=AllSides) override
 Sets CSS margins around the widget. More...
 
virtual WLength margin (Side side) const override
 Returns a CSS margin set. More...
 
virtual void setHiddenKeepsGeometry (bool enabled) override
 Sets whether the widget keeps its geometry when hidden. More...
 
virtual bool hiddenKeepsGeometry () const override
 Returns whether the widget keeps its geometry when hidden. More...
 
virtual bool isHidden () const override
 Returns whether the widget is set hidden. More...
 
virtual bool isVisible () const override
 Returns whether the widget is visible. More...
 
virtual void setDisabled (bool disabled) override
 Sets whether the widget is disabled. More...
 
virtual bool isDisabled () const override
 Returns whether the widget is set disabled. More...
 
virtual bool isEnabled () const override
 Returns whether the widget is enabled. More...
 
virtual void setPopup (bool popup) override
 Lets the widget overlay over other sibling widgets. More...
 
virtual bool isPopup () const override
 Returns whether the widget is overlayed. More...
 
virtual void setInline (bool isInline) override
 Sets whether the widget is displayed inline or as a block. More...
 
virtual bool isInline () const override
 Returns whether the widget is displayed inline or as block. More...
 
virtual void setDecorationStyle (const WCssDecorationStyle &style) override
 Sets a CSS decoration style. More...
 
virtual WCssDecorationStyledecorationStyle () override
 Returns the decoration style of this widget. More...
 
virtual void setStyleClass (const WString &styleClass) override
 Sets (one or more) CSS style classes. More...
 
virtual WString styleClass () const override
 Returns the CSS style class. More...
 
virtual void addStyleClass (const WString &styleClass, bool force=false) override
 Adds a CSS style class. More...
 
virtual void removeStyleClass (const WString &styleClass, bool force=false) override
 Removes a CSS style class. More...
 
virtual bool hasStyleClass (const WString &styleClass) const override
 Returns whether the widget has a style class.
 
virtual void setVerticalAlignment (AlignmentFlag alignment, const WLength &length=WLength::Auto) override
 Sets the vertical alignment. More...
 
virtual AlignmentFlag verticalAlignment () const override
 Returns the vertical alignment. More...
 
virtual WLength verticalAlignmentLength () const override
 Returns the fixed vertical alignment that was set. More...
 
virtual void setToolTip (const WString &text, TextFormat textFormat=TextFormat::Plain) override
 Sets a tooltip. More...
 
virtual WString toolTip () const override
 Returns the tooltip.
 
virtual void setDeferredToolTip (bool enable, TextFormat textFormat=TextFormat::Plain) override
 Enable deferred tooltip. More...
 
virtual void refresh () override
 Refresh the widget. More...
 
virtual void setAttributeValue (const std::string &name, const WString &value) override
 Sets an attribute value. More...
 
virtual WString attributeValue (const std::string &name) const override
 Returns an attribute value. More...
 
virtual void setJavaScriptMember (const std::string &name, const std::string &value) override
 Sets a JavaScript member. More...
 
virtual std::string javaScriptMember (const std::string &name) const override
 Returns the value of a JavaScript member. More...
 
virtual void callJavaScriptMember (const std::string &name, const std::string &args) override
 Calls a JavaScript member. More...
 
virtual bool loaded () const override
 Returns whether this widget has been loaded. More...
 
virtual void setCanReceiveFocus (bool enabled) override
 Sets whether the widget can receive focus. More...
 
virtual bool canReceiveFocus () const override
 Returns whether the widget can receive focus. More...
 
virtual void setFocus (bool focus) override
 Sets focus. More...
 
virtual bool setFirstFocus () override
 Set focus on the widget's first descendant. More...
 
virtual bool hasFocus () const override
 Returns whether the widget currently has the focus.
 
virtual void setTabIndex (int index) override
 Sets the tab index. More...
 
virtual int tabIndex () const override
 Returns the tab index. More...
 
virtual void setId (const std::string &id) override
 Sets the CSS Id. More...
 
virtual WWidgetfind (const std::string &name) override
 Finds a descendent widget by name. More...
 
virtual WWidgetfindById (const std::string &name) override
 Finds a descendent widget by id.
 
virtual void setSelectable (bool selectable) override
 Sets as selectable. More...
 
virtual void doJavaScript (const std::string &js) override
 Executes the given JavaScript statements when the widget is rendered or updated. More...
 
virtual void propagateSetEnabled (bool enabled) override
 Propagates that a widget was enabled or disabled through children. More...
 
virtual bool scrollVisibilityEnabled () const finaloverride
 Returns whether scroll visibility detection is enabled for this widget. More...
 
virtual void setScrollVisibilityEnabled (bool enabled) finaloverride
 Sets whether scroll visibility detection is enabled for this widget. More...
 
virtual int scrollVisibilityMargin () const finaloverride
 Returns the margin around the viewport within which the widget is considered visible. More...
 
virtual void setScrollVisibilityMargin (int margin) finaloverride
 Sets the margin around the viewport within which the widget is considered visible. More...
 
virtual Signal< bool > & scrollVisibilityChanged () finaloverride
 Signal triggered when the scroll visibility of this widget changes. More...
 
virtual bool isScrollVisible () const finaloverride
 Returns whether this widget is currently considered scroll visible. More...
 
virtual void setThemeStyleEnabled (bool enabled) finaloverride
 Sets whether theme styling for a widget is enabled or disabled. More...
 
virtual bool isThemeStyleEnabled () const finaloverride
 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.
 
std::unique_ptr< WWidgetremoveFromParent ()
 Removes the widget from its parent. 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=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 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
void addChild (std::unique_ptr< WObject > child)
 Add a child WObject whose lifetime is determined by this WObject.
 
template<typename Child >
Child * addChild (std::unique_ptr< Child > child)
 Add a child WObject, returning a raw pointer. More...
 
std::unique_ptr< WObjectremoveChild (WObject *child)
 Remove a child WObject, so its lifetime is no longer determined by this WObject.
 
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...
 
- Public Member Functions inherited from Wt::Core::observable
 observable () noexcept
 Default constructor.
 
virtual ~observable ()
 Destructor. More...
 

Protected Member Functions

virtual void render (WFlags< RenderFlag > flags) override
 Renders the widget. More...
 
- Protected Member Functions inherited from Wt::WMenu
virtual void internalPathChanged (const std::string &path)
 Handling of internal path changes. More...
 
virtual int nextAfterHide (int index)
 Returns the index of the item to be selected after hides. More...
 
virtual void select (int index, bool changePath)
 Selects an item. More...
 
- Protected Member Functions inherited from Wt::WCompositeWidget
virtual void enableAjax () override
 Progresses to an Ajax-enabled widget. More...
 
void setImplementation (std::unique_ptr< WWidget > widget)
 Set the implementation widget. More...
 
WWidgetimplementation ()
 Method::Get the implementation widget. More...
 
virtual int boxPadding (Orientation orientation) const override
 Returns the widget's built-in padding. More...
 
virtual int boxBorder (Orientation orientation) const override
 Returns the widget's built-in border width. 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 ()
 Creates a widget.
 
virtual void dropEvent (WDropEvent dropEvent)
 Handles a drop event. More...
 
void scheduleRender (WFlags< RepaintFlag > flags=None)
 Schedules rerendering of the widget. More...
 
virtual WStatelessSlot * getStateless (Method method) override
 On-demand stateless slot implementation. More...
 

Additional Inherited Members

- Public Types inherited from Wt::WObject
typedef void(WObject::* Method) ()
 Typedef for a WObject method without arguments.
 
- Static Public Member Functions inherited from Wt::WWidget
static WString tr (const char *key)
 Short hand for WString::tr() More...
 

Detailed Description

A menu presented in a popup window.

The menu implements a typical context menu, with support for submenu's. It is a specialized WMenu from which it inherits most of the API.

When initially created, the menu is invisible, until popup() or exec() is called. Then, the menu will remain visible until an item is selected, or the user cancels the menu (by hitting Escape or clicking elsewhere).

The implementation assumes availability of JavaScript to position the menu at the current mouse position and provide feed-back of the currently selected item.

As with WDialog, there are two ways of using the menu. The simplest way is to use one of the synchronous exec() methods, which starts a reentrant event loop and waits until the user cancelled the popup menu (by hitting Escape or clicking elsewhere), or selected an item.

Alternatively, you can use one of the popup() methods to show the menu and listen to the triggered signal where you read the result(), or associate the menu with a button using WPushButton::setMenu().

You have several options to react to the selection of an item:

Usage example:

// Create a menu with some items
popup.addItem("icons/item1.gif", "Item 1");
popup.addItem("Item 2")->setCheckable(true);
popup.addItem("Item 3");
popup.addSeparator();
popup.addItem("Item 4");
popup.addSeparator();
popup.addItem("Item 5");
popup.addItem("Item 6");
popup.addSeparator();
auto subMenu = std::make_unique<Wt::WPopupMenu>();
subMenu->addItem("Sub Item 1");
subMenu->addItem("Sub Item 2");
popup.addMenu("Item 7", std::move(subMenu));
WMenuItem *item = popup.exec(event);
if (item) {
// ... do associated action.
}

A snapshot of the WPopupMenu:

WPopupMenu-default-1.png
WPopupMenu example (default)
WPopupMenu-polished-1.png
WPopupMenu example (polished)
See also
WMenuItem

Constructor & Destructor Documentation

Wt::WPopupMenu::WPopupMenu ( WStackedWidget contentsStack = nullptr)

Creates a new popup menu.

The menu is hidden, by default, and must be shown using popup() or exec().

Member Function Documentation

Signal& Wt::WPopupMenu::aboutToHide ( )

Signal emitted when the popup is hidden.

Unlike the itemSelected() signal, aboutToHide() is only emitted by the toplevel popup menu (and not by submenus), and is also emitted when no item was selected.

You can use result() to get the selected item, which may be 0.

See also
triggered(), itemSelected()
WMenuItem * Wt::WPopupMenu::exec ( const WPoint point)

Executes the the popup at a position.

Displays the popup at a point with document coordinates p, using popup(), and the waits until a menu item is selected, or the menu is cancelled.

Returns the selected menu (or sub-menu) item, or 0 if the user cancelled the menu.

See also
popup()
WMenuItem * Wt::WPopupMenu::exec ( const WMouseEvent event)

Executes the the popup at the location of a mouse event.

This is a convenience method for exec(const WPoint& p) that uses the event's document coordinates.

See also
exec(const WPoint&)
WMenuItem * Wt::WPopupMenu::exec ( WWidget location,
Orientation  orientation = Orientation::Vertical 
)

Executes the popup besides a widget.

See also
positionAt(), popup(const WPointF&)
void Wt::WPopupMenu::popup ( const WPoint point)

Shows the the popup at a position.

Displays the popup at a point with document coordinates point. The positions intelligent, and will chose one of the four menu corners to correspond to this point so that the popup menu is completely visible within the window.

See also
exec()
void Wt::WPopupMenu::popup ( const WMouseEvent event)

Shows the the popup at the location of a mouse event.

This is a convenience method for popup(const WPoint&) that uses the event's document coordinates.

See also
popup(const WPoint& p), WMouseEvent::document()
void Wt::WPopupMenu::popup ( WWidget location,
Orientation  orientation = Orientation::Vertical 
)

Shows the popup besides a widget.

See also
positionAt(), popup(const WPointF&)
void Wt::WPopupMenu::render ( WFlags< RenderFlag flags)
overrideprotectedvirtual

Renders the widget.

This function renders the widget (or an update for the widget), after this has been scheduled using scheduleRender().

The default implementation will render the widget by serializing changes to JavaScript and HTML. You may want to reimplement this widget if you have been postponing some of the layout / rendering implementation until the latest moment possible. In that case you should make sure you call the base implementation however.

Reimplemented from Wt::WMenu.

WMenuItem* Wt::WPopupMenu::result ( ) const

Returns the last triggered menu item.

The result is 0 when the user cancelled the popup menu.

void Wt::WPopupMenu::setAutoHide ( bool  enabled,
int  autoHideDelay = 0 
)

Configure auto-hide when the mouse leaves the menu.

If enabled, The popup menu will be hidden when the mouse leaves the menu for longer than autoHideDelay (milliseconds). The popup menu result will be 0, as if the user cancelled.

By default, this option is disabled.

void Wt::WPopupMenu::setHidden ( bool  hidden,
const WAnimation animation = WAnimation() 
)
overridevirtual

Hides or shows the widget.

Hides or show the widget (including all its descendant widgets). When setting hidden = false, this widget and all descendant widgets that are not hidden will be shown. A widget is only visible if it and all its ancestors in the widget tree are visible, which may be checked using isVisible().

Note
hide() and show() are considered to be stateless slots by default. If you override setHidden() and need to modify server state whenever it is called, you'll need to call WObject::isNotStateless().

Reimplemented from Wt::WCompositeWidget.

void Wt::WPopupMenu::setMaximumSize ( const WLength width,
const WLength height 
)
overridevirtual

Sets a maximum size.

Specifies a maximum size for this widget, setting CSS max-width and max-height properties.

The default the maximum width and height are WLength::Auto, indicating no maximum size. A LengthUnit::Percentage size should not be used, as this is (in virtually all cases) undefined behaviour.

When the widget is a container widget that contains a layout manager, then setting a maximum size will have the effect of letting the size of the container to reflect the preferred size of the contents (rather than constraining the size of the children based on the size of the container), up to the specified maximum size.

See also
resize(), setMinimumSize()

Reimplemented from Wt::WCompositeWidget.

void Wt::WPopupMenu::setMinimumSize ( const WLength width,
const WLength height 
)
overridevirtual

Sets a minimum size.

Specifies a minimum size for this widget, setting CSS min-width and min-height properties.

The default minimum width and height is 0. The special value WLength::Auto indicates that the initial width is used as minimum size. A LengthUnit::Percentage size should not be used, as this is (in virtually all cases) undefined behaviour.

When the widget is inserted in a layout manager, then the minimum size will be taken into account.

See also
resize(), minimumWidth(), minimumHeight()

Reimplemented from Wt::WCompositeWidget.

Signal<WMenuItem *>& Wt::WPopupMenu::triggered ( )

Signal emitted when an item is selected.

Unlike the itemSelected() signal, triggered() is only emitted by the toplevel popup menu (and not by submenus).

See also
aboutToHide(), itemSelected()

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