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

An abstract widget that can receive user-interface interaction. More...

#include <Wt/WInteractWidget.h>

Inheritance diagram for Wt::WInteractWidget:
Inheritance graph
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Public Member Functions

 WInteractWidget ()
 Create an InteractWidget.
 
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=nullptr, bool isDragWidgetOnly=false, WObject *sourceWidget=nullptr)
 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) override
 Lets the widget overlay over other sibling widgets. More...
 
virtual void load () override
 Loads content just before the widget is used. More...
 
virtual bool isEnabled () const override
 Returns whether the widget is enabled. More...
 
- Public Member Functions inherited from Wt::WWebWidget
 WWebWidget ()
 Construct a WebWidget.
 
virtual std::vector< WWidget * > children () const override
 Returns child widgets. More...
 
SignalchildrenChanged ()
 Signal emitted when children have been added or removed. 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 void setMinimumSize (const WLength &width, const WLength &height) override
 Sets a minimum size. More...
 
virtual WLength minimumWidth () const override
 Returns the minimum width. More...
 
virtual WLength minimumHeight () const override
 Returns the minimum height. More...
 
virtual void setMaximumSize (const WLength &width, const WLength &height) override
 Sets a maximum size. 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 void setHidden (bool hidden, const WAnimation &animation=WAnimation()) override
 Hides or shows the widget. 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 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()) 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 void setDeferredToolTip (bool enable, TextFormat textFormat=TextFormat::Plain) override
 Enable deferred tooltip. More...
 
virtual WString toolTip () const override
 Returns the tooltip.
 
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 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 &id) override
 Finds a descendent widget by id.
 
virtual void setSelectable (bool selectable) override
 Sets as selectable. More...
 
virtual void doJavaScript (const std::string &javascript) override
 Executes the given JavaScript statements when the widget is rendered or updated. More...
 
virtual const std::string id () const override
 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...
 
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 bool setFirstFocus () override
 Set focus on the widget's first descendant. More...
 
virtual void setFocus (bool focus) override
 Sets focus. 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...
 
EventSignalblurred ()
 Signal emitted when the widget lost focus. More...
 
EventSignalfocussed ()
 Signal emitted when the widget recieved focus. 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...
 
virtual void setObjectName (const std::string &name) override
 Sets an object name. More...
 
- Public Member Functions inherited from Wt::WWidget
virtual ~WWidget ()
 Destructor. More...
 
WWidgetparent () const
 Returns the parent widget.
 
virtual std::unique_ptr< WWidgetremoveWidget (WWidget *widget)
 Removes a child 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.
 
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...
 
- Public Member Functions inherited from Wt::Core::observable
 observable () noexcept
 Default constructor.
 
virtual ~observable ()
 Destructor. More...
 

Protected Member Functions

virtual void propagateSetEnabled (bool enabled) override
 Propagates that a widget was enabled or disabled through children. More...
 
- Protected Member Functions inherited from Wt::WWebWidget
virtual void enableAjax () override
 Progresses to an Ajax-enabled widget. More...
 
virtual WStatelessSlot * getStateless (Method method) override
 On-demand stateless slot implementation. More...
 
virtual void render (WFlags< RenderFlag > flags) override
 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 ()
 Creates a widget.
 
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=None)
 Schedules rerendering of the widget. 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::WWebWidget
static std::string jsStringLiteral (const std::string &v, char delimiter= '\'')
 Turn a CharEncoding::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...
 

Detailed Description

An abstract widget that can receive user-interface interaction.

This abstract widget provides access to event signals that correspond to user-interface interaction through mouse or keyboard.

When JavaScript is disabled, only the clicked() event will propagate (but without event details information).

CSS

Styling through CSS is not applicable.

Member Function Documentation

EventSignal< WMouseEvent > & Wt::WInteractWidget::clicked ( )

Event signal emitted when a mouse key was clicked on this widget.

The event details contains information such as the button, optional keyboard modifiers, and mouse coordinates relative to the widget, the window window, or the document.

Note
When JavaScript is disabled, the event details contain invalid information.
EventSignal< WMouseEvent > & Wt::WInteractWidget::doubleClicked ( )

Event signal emitted when a mouse key was double clicked on this widget.

The event details contains information such as the button, optional keyboard modifiers, and mouse coordinates relative to the widget, the window window, or the document.

Note
When JavaScript is disabled, the signal will never fire.
EventSignal & Wt::WInteractWidget::enterPressed ( )

Event signal emitted when enter was pressed.

This signal is emitted when the Enter or Return key was pressed.

Form widgets (like WLineEdit) will receive key events when focussed. Other widgets will receive key events when they contain (directly or indirectly) a form widget that has focus.

To capture an enter press when no element has focus, see WApplication::globalEnterPressed()

See also
keyPressed(), Key::Enter
EventSignal & Wt::WInteractWidget::escapePressed ( )

Event signal emitted when escape was pressed.

This signal is emitted when the Escape key was pressed.

Form widgets (like WLineEdit) will receive key events when focussed. Other widgets will receive key events when they contain (directly or indirectly) a form widget that has focus.

To capture an escape press when no element has focus, see WApplication::globalEscapePressed()

See also
keyPressed(), Key::Escape
EventSignal< WGestureEvent > & Wt::WInteractWidget::gestureChanged ( )

Event signal emitted when a gesture is changed.

The event details contains information about the scale and the rotation.

Note
When JavaScript is disabled, the signal will never fire.
EventSignal< WGestureEvent > & Wt::WInteractWidget::gestureEnded ( )

Event signal emitted when a gesture is ended.

The event details contains information about the scale and the rotation.

Note
When JavaScript is disabled, the signal will never fire.
EventSignal< WGestureEvent > & Wt::WInteractWidget::gestureStarted ( )

Event signal emitted when a gesture is started.

The event details contains information about the scale and the rotation.

Note
When JavaScript is disabled, the signal will never fire.
bool Wt::WInteractWidget::isEnabled ( ) const
overridevirtual

Returns whether the widget is enabled.

A widget is enabled if it is not disabled, and none of its ancestors are disabled. This method returns whether the widget is rendered as enabled, while isDisabled() returns whether a widget has been explicitly disabled.

Note that a widget may be at the same time not enabled, and not disabled, in case one of its ancestors was disabled.

See also
isDisabled()

Reimplemented from Wt::WWebWidget.

EventSignal< WKeyEvent > & Wt::WInteractWidget::keyPressed ( )

Event signal emitted when a "character" was entered.

The keyPressed signal is emitted when a key is pressed, and a character is entered. Unlike keyWentDown(), it is emitted only for key presses that result in a character being entered, and thus not for modifier keys or keyboard navigation keys.

Form widgets (like WLineEdit) will receive key events when focussed. Other widgets will receive key events when they contain (directly or indirectly) a form widget that has focus.

To capture a key press when no element has focus, see WApplication::globalKeyPressed()

See also
keyWentDown()
EventSignal< WKeyEvent > & Wt::WInteractWidget::keyWentDown ( )

Event signal emitted when a keyboard key is pushed down.

The keyWentDown signal is the first signal emitted when a key is pressed (before the keyPressed signal). Unlike keyPressed() however it is also emitted for modifier keys (such as "shift", "control", ...) or keyboard navigation keys that do not have a corresponding character.

Form widgets (like WLineEdit) will receive key events when focussed. Other widgets will receive key events when they contain (directly or indirectly) a form widget that has focus.

To capture a key down event when no element has focus, see WApplication::globalKeyWentDown()

See also
keyPressed(), keyWentUp()
EventSignal< WKeyEvent > & Wt::WInteractWidget::keyWentUp ( )

Event signal emitted when a keyboard key is released.

This is the counter-part of the keyWentDown() event. Every key-down has its corresponding key-up.

Form widgets (like WLineEdit) will receive key events when focussed. Other widgets will receive key events when they contain (directly or indirectly) a form widget that has focus.

To capture a key up event when no element has focus, see WApplication::globalKeyWentUp()

See also
keyWentDown()
void Wt::WInteractWidget::load ( )
overridevirtual

Loads content just before the widget is used.

This method is called after a widget is inserted in the widget hierarchy and fully constructed, but before the widget is rendered. Widgets that get inserted in the widget hierarchy will be rendered. Visible widgets are rendered immediately, and invisible widgets in the back-ground (or not for a plain HTML session). This method is called when the widget is directly or indirectly inserted into the widget tree.

The default implementation simply propagates the load signal to its children. You may want to override this method to delay loading of resource-intensive contents.

During the life-time of a widget, this method may be called multiple times, so you should make sure that you do a deferred initializiation only once.

Reimplemented from Wt::WWebWidget.

Reimplemented in Wt::WDateEdit, and Wt::WTimeEdit.

EventSignal< WMouseEvent > & Wt::WInteractWidget::mouseDragged ( )

Event signal emitted when the mouse is dragged over this widget.

The mouse event contains information on the button(s) currently pressed. If multiple buttons are currently pressed, only the button with smallest enum value is returned.

Note
When JavaScript is disabled, the signal will never fire.
EventSignal< WMouseEvent > & Wt::WInteractWidget::mouseMoved ( )

Event signal emitted when the mouse moved over this widget.

The mouse event contains information on the button(s) currently pressed. If multiple buttons are currently pressed, only the button with smallest enum value is returned.

Note
When JavaScript is disabled, the signal will never fire.
int Wt::WInteractWidget::mouseOverDelay ( ) const

Returns the mouse over signal delay.

See also
setMouseOverDelay()
EventSignal< WMouseEvent > & Wt::WInteractWidget::mouseWentDown ( )

Event signal emitted when a mouse key was pushed down on this widget.

The event details contains information such as the button, optional keyboard modifiers, and mouse coordinates relative to the widget, the window window, or the document.

Note
When JavaScript is disabled, the signal will never fire.
EventSignal< WMouseEvent > & Wt::WInteractWidget::mouseWentOut ( )

Event signal emitted when the mouse went out of this widget.

Note
When JavaScript is disabled, the signal will never fire.
EventSignal< WMouseEvent > & Wt::WInteractWidget::mouseWentOver ( )

Event signal emitted when the mouse entered this widget.

The signal is emitted as soon as the mouse enters the widget, or after some delay as configured by setMouseOverDelay()

Note
When JavaScript is disabled, the signal will never fire.
EventSignal< WMouseEvent > & Wt::WInteractWidget::mouseWentUp ( )

Event signal emitted when a mouse key was released on this widget.

The event details contains information such as the button, optional keyboard modifiers, and mouse coordinates relative to the widget, the window window, or the document.

If you connect also the mouseWentDown() signal, then a subsequent mouseWentUp() will be received by the same widget, even if mouse is no longer over the original widget.

Note
When JavaScript is disabled, the signal will never fire.
EventSignal< WMouseEvent > & Wt::WInteractWidget::mouseWheel ( )

Event signal emitted when the mouse scroll wheel was used.

The event details contains information such as the wheel delta, optional keyboard modifiers, and mouse coordinates relative to the widget, the window window, or the document.

Note
When JavaScript is disabled, the signal will never fire.
void Wt::WInteractWidget::propagateSetEnabled ( bool  enabled)
overrideprotectedvirtual

Propagates that a widget was enabled or disabled through children.

When enabling or disabling a widget, you usually also want to disable contained children. This method is called by setDisabled() to propagate its state to all children.

You may want to reimplement this method if they wish to render differently when a widget is disabled. The default implementation will propagate the signal to all children.

Reimplemented from Wt::WWebWidget.

Reimplemented in Wt::WPushButton, Wt::WTextEdit, Wt::WAnchor, Wt::WFormWidget, Wt::WLabel, Wt::WDateEdit, and Wt::WTimeEdit.

void Wt::WInteractWidget::setDraggable ( const std::string &  mimeType,
WWidget dragWidget = nullptr,
bool  isDragWidgetOnly = false,
WObject sourceWidget = nullptr 
)

Configure dragging for drag and drop.

Enable drag&drop for this widget. The mimeType is used to find a suitable drop target, which must accept dropping of this mimetype.

By default, the entire widget is dragged. One may specify another widget to be dragged (for example the parent as dragWidget) or a dragWidget whose function is only to represent the drag visually (when isDragWidgetOnly = true).

The widget to be identified as source in the dropEvent may be given explicitly, and will default to this widget otherwise.

When using a touch interface, the widget can also be dragged after a long press.

Note
When JavaScript is disabled, drag&drop does not work.
See also
WWidget::dropEvent(), WWidget::acceptDrops(), WDropEvent
void Wt::WInteractWidget::setMouseOverDelay ( int  delay)

Sets a delay for the mouse over event.

This sets a delay (in milliseconds) before the mouse over event is emitted.

The default value is 0.

See also
mouseWentOver()
void Wt::WInteractWidget::setPopup ( bool  popup)
overridevirtual

Lets the widget overlay over other sibling widgets.

A widget that isPopup() will be rendered on top of any other sibling widget contained within the same parent (including other popup widgets previously added to the container).

This will only have an effect when the widgetis either Wt::PositionScheme::Absolute or Wt::PositionScheme::Fixed positionScheme().

This applies to CSS-based layout, and configures the z-index property.

Reimplemented from Wt::WWebWidget.

EventSignal< WTouchEvent > & Wt::WInteractWidget::touchEnded ( )

Event signal emitted when a finger is removed from the screen.

The event details contains information such as the touches, target touches and changed touches.

Note
When JavaScript is disabled, the signal will never fire.
EventSignal< WTouchEvent > & Wt::WInteractWidget::touchMoved ( )

Event signal emitted when a finger, which is already placed on the screen, is moved across the screen.

The event details contains information such as the touches, target touches and changed touches.

Note
When JavaScript is disabled, the signal will never fire.
EventSignal< WTouchEvent > & Wt::WInteractWidget::touchStarted ( )

Event signal emitted when a finger is placed on the screen.

The event details contains information such as the touches, target touches and changed touches.

Note
When JavaScript is disabled, the signal will never fire.
void Wt::WInteractWidget::unsetDraggable ( )

Disable drag & drop for this widget.

See also
setDraggable()

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