#include <Pt/Forms/Button.h>

Interaction control for press, release, and click. More...

Inherited by CheckBox, PushButton, and SpinBoxButton.

Public Types
enum	FocusPolicy { NoFocus, AcceptFocus, KeepFocus }
	Defines whether a control can receive or retain focus. More...

Public Member Functions
	Button ()
	Creates a button that accepts focus.

virtual	~Button ()
	Destroys the button.

const Pt::String &	text () const
	Returns the caption.

void	setText (const Pt::String &t)
	Sets the caption to t and records its mnemonic.

bool	isHovered () const
	Returns true if the pointer is over the button.

void	click ()
	Runs press then release as a completed click.

Signal &	clicked ()
	Returns the signal emitted after a completed click.

void	setParent (View &parent)
	Attaches this control to parent. More...

void	unparent ()
	Detaches this control from its current parent. More...

void	add (Control &control)
	Attaches control as a direct child. More...

void	remove (Control &control)
	Detaches direct child control without destroying it. More...

const std::vector< Control * > &	controls () const
	Returns the non-owning, ordered list of direct children.

FocusPolicy	focusPolicy () const
	Returns this control's focus policy.

void	setFocusPolicy (FocusPolicy f)
	Sets this control's focus policy. More...

size_t	focusIndex () const
	Returns this control's focus-navigation index.

void	setFocusIndex (size_t index)
	Sets this control's focus-navigation index. More...

bool	hasFocus () const
	Returns true when this control currently has form focus.

void	focus ()
	Requests focus from the containing form. More...

Key	actionKey () const
	Returns the key that invokes onActionKey() while focused.

void	setActionKey (const Key &ak)
	Sets the focused action key to ak. More...

const Key *	shortcut () const
	Returns the registered form shortcut, or 0 when none is set.

void	setShortcut (const Key *k)
	Registers k as this control's form shortcut. More...

const Pt::Char *	mnemonic () const
	Returns the registered mnemonic character, or 0 when none is set.

void	setMnemonic (const Char &ch)
	Registers ch as this control's Alt mnemonic. More...

String	setMnemonic (const String &text)
	Extracts and registers a mnemonic marked by an ampersand. More...

void	setMnemonicControl (Control *control)
	Forwards mnemonic activation to control. More...

void	processShortcut (const Key &key)
	Invokes this control's shortcut hook for key. More...

void	processMnemonic (Pt::Char m)
	Invokes this control's mnemonic hook for m. More...

bool	acceptsInput () const
	Returns true when this control is visible and enabled. More...

void	raise ()
	Requests that this control be painted above its siblings. More...

const Gfx::RectF	geometry () const
	Returns the position and size in parent logical coordinates.

const SizePolicy &	sizePolicy () const
	Returns this control's requested size policy.

void	setSizePolicy (const SizePolicy &policy)
	Sets this control's requested size policy and requests relayout. More...

Gfx::SizeF	preferredSize () const
	Returns the result of the most recent measure() call.

Gfx::SizeF	measure (const SizePolicy &policy)
	Measures the preferred size under parent constraint policy. More...

void	relayout ()
	Invalidates this control's measurement and layout. More...

const Spacing &	margin () const
	Returns the outer spacing requested around this control.

void	setMargin (const Spacing &s)
	Sets the outer spacing to s and requests relayout.

void	setMargin (double n)
	Sets equal outer spacing on every side and requests relayout.

void	setMargin (double horiz, double vertical)
	Sets horizontal and vertical outer spacing and requests relayout.

const Spacing &	padding () const
	Returns the inner spacing requested around this control's content.

void	setPadding (const Spacing &p)
	Sets the inner spacing to p and requests relayout.

void	setPadding (double n)
	Sets equal inner spacing on every side and requests relayout.

void	setPadding (double horiz, double vertical)
	Sets horizontal and vertical inner spacing and requests relayout.

Gfx::PointF	toControl (const Control &control, const Gfx::PointF &pos) const
	Converts pos from this view to control coordinates. More...

Gfx::PointF	fromControl (const Control &control, const Gfx::PointF &pos) const
	Converts pos from control to this view coordinates. More...

PaintSurface &	surface ()
	Returns this view's local paint-surface adapter. More...

const PaintSurface &	surface () const
	Returns this view's local paint-surface adapter.

void	setSurface (PaintSurface *surface, const Gfx::PointF &pos=Gfx::PointF())
	Assigns the surface on which this view displays its controls. More...

Pt::uint64_t	id () const
	Returns the application-unique ID of this live widget.

const std::string &	name () const
	Returns the optional name.

void	setName (const std::string &n)
	Sets the optional name immediately.

void	setNextResponder (Responder *r)
	Sets the next responder for unhandled input. More...

bool	isConnected () const
	Returns true when the widget is connected to a screen.

Screen *	screen ()
	Returns the connected screen, or 0 when disconnected.

const Screen *	screen () const
	Returns the connected screen, or 0 when disconnected.

Widget *	parent ()
	Returns the non-owning parent, or 0 when unparented.

const Widget *	parent () const
	Returns the non-owning parent, or 0 when unparented.

bool	isDescendantOf (const Widget &top) const
	Returns true when this widget is a strict descendant of top.

bool	isAncestorOf (const Widget &child) const
	Returns true when this widget is a strict ancestor of child.

Widget *	hitTest (const Gfx::PointF &pos)
	Returns the descendant hit at local position pos. More...

Gfx::PointF	toParent (const Gfx::PointF &pos) const
	Converts local position pos to parent coordinates.

Gfx::PointF	fromParent (const Gfx::PointF &pos) const
	Converts parent position pos to local coordinates.

Gfx::PointF	toGlobal (const Gfx::PointF &pos) const
	Converts local position pos to global coordinates. More...

Gfx::PointF	fromGlobal (const Gfx::PointF &pos) const
	Converts global position pos to local coordinates. More...

void	addPeer (Widget &peer)
	Adds a bidirectional, non-owning peer association with peer. More...

void	removePeer (Widget &peer)
	Removes the bidirectional peer association with peer. More...

void	invalidate ()
	Queues a coalesced invalidation. More...

virtual void	repaint (const Gfx::RectF &rect)
	Requests repainting local dirty rectangle rect. More...

virtual void	repaint ()
	Requests repainting the complete local bounds.

double	scaleFactor () const
	Returns the current logical-to-device scale factor.

const Gfx::Scaling &	scaling () const
	Returns the current logical-to-device scaling.

bool	isVisible () const
	Returns whether the last show event made the widget visible.

virtual void	show (bool b=true)
	Requests that the widget be shown or hidden. More...

bool	isEnabled () const
	Returns whether the last enable event made the widget enabled.

virtual void	enable (bool isEnable=true)
	Requests that the widget be enabled or disabled. More...

void	activate (bool active=true)
	Requests that the widget become active or inactive. More...

const Gfx::PointF &	position () const
	Returns the position in parent logical coordinates.

virtual void	move (const Gfx::PointF &pos)
	Requests a new parent-local position pos. More...

const Gfx::SizeF &	size () const
	Returns the size in local logical coordinates.

const Gfx::RectF &	bounds () const
	Returns local bounds, whose origin is always local zero.

const Gfx::SizeF &	minimumSize () const
	Returns the locally stored minimum size. More...

void	setMinimumSize (const Gfx::SizeF &s)
	Sets the local minimum size and notifies the size-limit hook. More...

void	setMinimumSize (double w, double h)
	Sets the local minimum width and height.

void	setMinimumWidth (double w)
	Sets the local minimum width.

void	setMinimumHeight (double h)
	Sets the local minimum height.

const Gfx::SizeF &	maximumSize () const
	Returns the locally stored maximum size. More...

void	setMaximumSize (const Gfx::SizeF &s)
	Sets the local maximum size and notifies the size-limit hook. More...

void	setMaximumSize (double w, double h)
	Sets the local maximum width and height.

void	setMaximumWidth (double w)
	Sets the local maximum width.

void	setMaximumHeight (double h)
	Sets the local maximum height.

virtual void	resize (const Gfx::SizeF &s)
	Requests a new local size s. More...

void	setCapture (bool capture)
	Requests pointer input capture or release. More...

const Cursor *	cursor () const
	Returns this widget's cursor or the default cursor. More...

void	setCursor (const Cursor *c)
	Sets a local cursor override. More...

void	processEvent (const Pt::Event &ev)
	Processes ev through this widget's event dispatcher. More...

Pt::Signal< const Pt::Event & > &	eventReceived ()
	Returns the event dispatcher signal. More...

bool	mouseEvent (const MouseEvent &ev)
	Delivers ev along the mouse responder chain. More...

void	touchEvent (const TouchEvent &ev)
	Delivers ev along the touch responder chain. More...

void	scrollEvent (const ScrollEvent &ev)
	Delivers ev along the scroll responder chain.

void	enterEvent (const EnterEvent &ev)
	Delivers ev along the enter responder chain.

void	leaveEvent (const LeaveEvent &ev)
	Delivers ev along the leave responder chain.

void	keyEvent (const KeyEvent &ev)
	Delivers ev along the key responder chain.

Protected Member Functions
virtual void	onPressed ()
	Called when a click gesture begins.

virtual void	onReleased ()
	Called when a click gesture completes.

virtual void	onCanceled ()
	Called when a click gesture is abandoned.

virtual void	onMnemonic (Pt::Char m)
	Runs a completed click for the mnemonic character m.

virtual void	onShortcut (const Key &key)
	Runs a completed click for the shortcut key.

virtual void	onActionKey (const KeyEvent &kev)
	Presses or releases the button for the action key kev.

virtual bool	onEnterEvent (const EnterEvent &ev)
	Marks the button hovered and requests a repaint.

virtual bool	onLeaveEvent (const LeaveEvent &ev)
	Clears hover and requests a repaint.

virtual void	onFocusEvent (const FocusEvent &ev)
	Forwards the focus change to the base control.

virtual bool	onMouseEvent (const MouseEvent &ev)
	Presses, releases, or cancels from the mouse event ev.

virtual bool	onTouchEvent (const TouchEvent &ev)
	Presses, releases, or cancels from the touch event ev.

virtual bool	onScrollEvent (const ScrollEvent &ev)
	Cancels an in-progress click and forwards ev.

virtual void	onInvalidateEvent (const InvalidateEvent &ev)
	Handles the final coalesced invalidation event. More...

virtual void	onInvalidate ()
	Updates derived state after invalidation. More...

virtual void	onProcessPaintEvent (const PaintEvent &ev)
	Processes a paint event and paints visible child controls. More...

virtual void	onPaintEvent (const PaintEvent &ev)
	Handles this control's own paint event. More...

virtual void	onPaint (PaintContext &context, const Gfx::RectF &rect)
	Paints custom content in local coordinates. More...

virtual Gfx::SizeF	onMeasure (const SizePolicy &policy)
	Measures intrinsic content for effective policy policy. More...

virtual void	onProcessLayoutEvent (const LayoutEvent &ev)
	Processes a pending layout event. More...

virtual void	onLayoutEvent (const LayoutEvent &ev)
	Handles the aligned layout rectangle and requests repaint.

virtual void	onLayout (const Gfx::RectF &rect)
	Assigns geometry to direct children within rect. More...

virtual void	onSetSizeLimits (const Gfx::SizeF &minSize, const Gfx::SizeF &maxSize)
	Requests relayout after local size limits change.

virtual void	onSetSurface (PaintSurface *surface, const Gfx::PointF &pos)
	Propagates a surface assignment to direct children. More...

virtual void	onAddControl (Control &control)
	Notifies after control becomes a direct child.

virtual void	onRemoveControl (Control &control)
	Notifies after control stops being a direct child.

virtual void	onConnect (Screen &screen)
	Connects this control and all direct descendants to screen.

virtual void	onDisconnect ()
	Disconnects this control and all direct descendants from the screen.

virtual Widget *	onHitTest (const Gfx::PointF &p)
	Returns the frontmost descendant hit at local position p. More...

virtual Gfx::PointF	onToParent (const Gfx::PointF &pos) const
	Converts local coordinates to the containing view.

virtual Gfx::PointF	onFromParent (const Gfx::PointF &pos) const
	Converts containing-view coordinates to local coordinates.

virtual void	onRequestRepaint (const Gfx::RectF &rect)
	Forwards a local repaint request to the parent view.

virtual void	onRequestShow (bool isShown)
	Records and forwards a visibility request to the parent view.

virtual void	onRequestEnable (bool isEnable)
	Records and forwards an enable request to the parent view.

virtual void	onRequestActivate (bool active)
	Forwards an activation request to the parent view.

virtual void	onRequestMove (const Gfx::PointF &pos)
	Records and forwards a move request to the parent view.

virtual void	onRequestResize (const Gfx::SizeF &s)
	Records and forwards a resize request to the parent view.

virtual void	onProcessEvent (const Pt::Event &ev)
	Dispatches ev through the inherited widget event dispatcher.

virtual void	onProcessEnableEvent (const EnableEvent &ev)
	Dispatches effective enabled state to this control and its children. More...

virtual void	onEnableEvent (const EnableEvent &ev)
	Updates enabled state and handles an enable event.

virtual void	onEnable (bool isEnable)
	Performs behavior associated with effective enabled state isEnable.

virtual void	onProcessShowEvent (const ShowEvent &ev)
	Dispatches a visibility event.

virtual void	onShowEvent (const ShowEvent &ev)
	Handles a visibility event and requests relayout.

virtual void	onShow (bool visible)
	Performs behavior associated with visibility state visible.

virtual void	onProcessFocusEvent (const FocusEvent &ev)
	Dispatches a focus event.

virtual void	onProcessRescaleEvent (const RescaleEvent &ev)
	Dispatches a scale change to this control and all children.

virtual void	onRescaleEvent (const RescaleEvent &ev)
	Handles a scale change.

virtual void	onRescale (double scaling)
	Aligns local spacing and size-policy values to scaling.

virtual void	onProcessMoveEvent (const MoveEvent &ev)
	Dispatches a move event.

virtual void	onMoveEvent (const MoveEvent &ev)
	Updates parent-local position from a move event.

virtual void	onProcessResizeEvent (const ResizeEvent &ev)
	Dispatches a resize event.

virtual void	onResizeEvent (const ResizeEvent &ev)
	Updates local size and bounds from a resize event.

virtual void	onProcessMouseEvent (const MouseEvent &ev)
	Routes mouse input to the frontmost eligible child or this control. More...

virtual void	onProcessTouchEvent (const TouchEvent &ev)
	Routes touch input to the frontmost eligible child or this control. More...

virtual void	onProcessScrollEvent (const ScrollEvent &ev)
	Delivers scroll input only while this control accepts input.

virtual void	onProcessEnterEvent (const EnterEvent &ev)
	Dispatches a pointer-entry event.

virtual void	onProcessLeaveEvent (const LeaveEvent &ev)
	Dispatches a pointer-leave event.

virtual void	onProcessKeyEvent (const KeyEvent &ev)
	Delivers key input only while this control accepts input.

virtual bool	onKeyEvent (const KeyEvent &ev)
	Handles focused action keys or continues responder dispatch.

virtual Gfx::PointF	onToControl (const Control &control, const Gfx::PointF &pos) const
	Converts this control coordinates to direct child coordinates.

virtual Gfx::PointF	onFromControl (const Control &control, const Gfx::PointF &pos) const
	Converts direct child coordinates to this control coordinates.

virtual void	onAttach (Control &control)
	Stores control as a direct child and invokes onAddControl().

virtual void	onDetach (Control &control)
	Removes control as a direct child and invokes onRemoveControl().

virtual void	onInit (Control &control)
	Initializes runtime relationships for newly attached control. More...

virtual void	onRelease (Control &control)
	Releases runtime relationships for detached control. More...

virtual void	onRepaintRequest (Control &control, const Gfx::RectF &rect)
	Converts and forwards rect from control for repainting.

virtual void	onRelayoutRequest (Control &control)
	Requests relayout after a direct child changes its layout.

virtual void	onEnableRequest (Control &control, bool isEnable)
	Delivers an effective enable request to direct child control.

virtual void	onActivateRequest (Control &control, bool active)
	Forwards a direct child's activation request to the parent view.

virtual void	onShowRequest (Control &control, bool isShown)
	Delivers a visibility request to direct child control.

virtual void	onMoveRequest (Control &control, const Gfx::PointF &pos)
	Forwards a direct child's move request to the parent view.

virtual void	onResizeRequest (Control &control, const Gfx::SizeF &size)
	Forwards a direct child's resize request to the parent view.

virtual void	onRaiseRequest (Control &control)
	Moves direct child control to the front of child order.

virtual const std::vector< Key >	onGetShortcuts ()
	Returns shortcuts registered by this control.

virtual const std::vector< Char >	onGetMnemonics ()
	Returns mnemonics registered by this control.

virtual void	onSetParent (Widget *parent)
	Records the non-owning parent relationship. More...

virtual Gfx::PointF	onToGlobal (const Gfx::PointF &pos) const
	Converts local position pos to global coordinates. More...

virtual Gfx::PointF	onFromGlobal (const Gfx::PointF &pos) const
	Converts global position pos to local coordinates. More...

virtual void	onAttachPeer (Widget &peer)
	Attaches non-owning peer peer. More...

virtual void	onDetachPeer (Widget &peer)
	Detaches non-owning peer peer. More...

virtual void	onRequestCapture (bool capture)
	Requests application-managed pointer capture or release.

virtual void	onProcessInvalidateEvent (const InvalidateEvent &ev)
	Coalesces and dispatches an invalidation event.

virtual Responder *	onNextResponder ()
	Returns the non-owning next responder, or 0.

virtual bool	onMousePress (const MouseEvent &ev)
	Handles a mouse press. The default returns false.

virtual bool	onMouseRelease (const MouseEvent &ev)
	Handles a mouse release. The default returns false.

virtual bool	onMouseMove (const MouseEvent &ev)
	Handles a mouse move. The default returns false.

Detailed Description

A Button holds a caption and hover, and runs a press, release, and cancel protocol that ends in clicked(). It is a base class for all button-like controls. Derive PushButton for a command or CheckBox for a boolean choice.

setText() sets the caption and records a mnemonic from an ampersand. Pointer, touch, mnemonic, shortcut, and the action key all run the protocol. A release outside the widget, or a scroll during a press, cancels.

Connect clicked() to handle a completed gesture. Override onPressed(), onReleased(), and onCanceled() in a subclass to implement the command or choice.

download.setText("&Download");
download.clicked() += Pt::slot(*this, &MainWindow::onStartDownload);
 
void MainWindow::onStartDownload()
{
    client.fetch(url);
}

Member Enumeration Documentation

◆ FocusPolicy

enum FocusPolicy

inherited

Enumerator
NoFocus	The control cannot receive focus.
AcceptFocus	The control participates in normal focus navigation.
KeepFocus	The control retains focus during focus navigation.

Member Function Documentation

◆ setParent()

void setParent ( View & parent )

inherited

The parent does not take ownership. If this control already has a parent, it is detached first. Attachment initializes the runtime relationships supplied by the parent, including form association, responder chain, screen connection, scaling, and paint surface.

◆ unparent()

void unparent ( )

inherited

Detachment removes the runtime relationships established during attachment but does not destroy this control.

◆ add()

void add ( Control & control )

inherited

The child remains owned by its caller. Direct children paint in attachment order and are hit-tested in reverse order.

◆ remove()

void remove ( Control & control )

inherited

Detachment reverses the runtime relationships established during attachment.

◆ setFocusPolicy()

void setFocusPolicy ( FocusPolicy f )

inherited

When the control belongs to a form, the form updates its focus navigation state. Changing the policy to NoFocus removes focus from this control when it currently owns it.

◆ setFocusIndex()

void setFocusIndex ( size_t index )

inherited

A containing form orders its focusable controls by this value.

◆ focus()

void focus ( )

inherited

The request has no effect while the control is unparented, outside a form, or uses the NoFocus policy. hasFocus() changes when the form delivers a FocusEvent.

◆ setActionKey()

void setActionKey ( const Key & ak )

inherited

New controls use Key::Space.

◆ setShortcut()

void setShortcut ( const Key * k )

inherited

The key is copied. Pass 0 to remove the shortcut. When multiple controls register the same key in a form, its last registration receives the shortcut.

◆ setMnemonic() [1/2]

void setMnemonic ( const Char & ch )

inherited

When multiple controls register the same character in a form, its last registration receives the mnemonic.

◆ setMnemonic() [2/2]

String setMnemonic ( const String & text )

inherited

For example, setMnemonic("&File") returns "File" and registers F. A doubled ampersand returns one literal ampersand. A trailing unpaired ampersand remains in the returned text.

◆ setMnemonicControl()

void setMnemonicControl ( Control * control )

inherited

The target is non-owning. Pass 0 to remove mnemonic forwarding.

◆ processShortcut()

void processShortcut ( const Key & key )

inherited

Forms call this after matching a registered shortcut. Applications normally register shortcuts with setShortcut() instead of calling this method directly.

◆ processMnemonic()

void processMnemonic ( Pt::Char m )

inherited

Forms call this after matching an Alt mnemonic. Applications normally register mnemonics with setMnemonic() instead of calling this method directly.

◆ acceptsInput()

bool acceptsInput ( ) const

inherited

Parent input routing uses this predicate before delivering pointer, touch, scroll, and key input to a child.

◆ raise()

void raise ( )

inherited

The parent moves a direct child to the end of its child order, which is painted last and hit-tested first.

◆ onInvalidateEvent()

virtual void onInvalidateEvent ( const InvalidateEvent & ev )

protectedvirtualinherited

The base implementation performs the normal widget invalidation and requests relayout. Overrides that retain this behavior must call the base implementation.

Reimplemented from Widget.

◆ onInvalidate()

virtual void onInvalidate ( )

protectedvirtualinherited

The default implementation requests relayout because changed control content may affect its preferred size.

Reimplemented from Widget.

Reimplemented in TabView, SpinBox, SpinBoxButton, Slider, ScrollBar, PushButton, ProgressBar, Panel, MenuItemBase, MenuBar, ListBox, ListBoxItem, LineEdit, Label, ComboBox, and CheckBox.

◆ onProcessPaintEvent()

virtual void onProcessPaintEvent ( const PaintEvent & ev )

protectedvirtualinherited

The dirty rectangle is clipped and converted to each child's local coordinates. Overrides that retain normal painting must call the base implementation.

Reimplemented from Widget.

Reimplemented in Workspace.

◆ onPaintEvent()

virtual void onPaintEvent ( const PaintEvent & ev )

protectedvirtualinherited

The base implementation creates the paint context and calls onPaint().

Reimplemented from View.

◆ onPaint()

virtual void onPaint	(	PaintContext &	context,
		const Gfx::RectF &	rect
	)

protectedvirtualinherited

rect is the local dirty rectangle. The default implementation does not draw.

Reimplemented from View.

Reimplemented in MenuSubItem, MenuItemBase, MenuBarItem, MenuBar, TabView, Slider, PushButton, ProgressBar, Panel, ListBox, ListBoxItem, ComboBox, CheckBox, SpinBox, SpinBoxButton, ScrollBar, LineEdit, Label, and Workspace.

◆ setSizePolicy()

void setSizePolicy ( const SizePolicy & policy )

inherited

The policy size is aligned to the current device scaling.

◆ measure()

Gfx::SizeF measure ( const SizePolicy & policy )

inherited

The control combines its own policy with the stricter parent modes, applies its minimum size, and caches the resulting preferred size. Fixed dimensions override the measured result; maximum dimensions cap it. The result remains cached until content, policy, limits, or scaling invalidates measurement.

◆ relayout()

void relayout ( )

inherited

The request propagates to the parent and is performed later by the containing form or layout sequence.

◆ onMeasure()

virtual Gfx::SizeF onMeasure ( const SizePolicy & policy )

protectedvirtualinherited

Return the preferred local content size. The default implementation returns (0, 0).

Reimplemented in ScrollBar, Workspace, TabView, TableLayout2, StackLayout, SpinBox, Slider, ScrollView, ScrollLayout, PushButton, ProgressBar, Panel, ListBox, LineEdit, Label, GridLayout, FlowLayout, DockingLayout, ComboBox, CheckBox, CanvasLayout, ListBoxItem, MenuItemBase, MenuBarItem, and MenuBar.

◆ onProcessLayoutEvent()

virtual void onProcessLayoutEvent ( const LayoutEvent & ev )

protectedvirtualinherited

The base implementation aligns the control geometry to the device pixel grid, calls onLayoutEvent(), and queues layout events for direct children. Overrides that retain this sequence must call the base implementation.

Reimplemented in Workspace.

◆ onLayout()

virtual void onLayout ( const Gfx::RectF & rect )

protectedvirtualinherited

Use child move() and resize() requests. The default implementation does not lay out children.

Reimplemented in MenuBar, Workspace, TabView, TableLayout2, StackLayout, SpinBox, Slider, ScrollView, ScrollLayout, ScrollBar, PushButton, ProgressBar, Panel, ListBox, ListBoxItem, LineEdit, Label, GridLayout, FlowLayout, DockingLayout, ComboBox, CheckBox, and CanvasLayout.

◆ onSetSurface()

virtual void onSetSurface	(	PaintSurface *	surface,
		const Gfx::PointF &	pos
	)

protectedvirtualinherited

Overrides that retain standard child painting must call the base implementation.

Reimplemented from View.

Reimplemented in Workspace.

◆ onHitTest()

virtual Widget* onHitTest ( const Gfx::PointF & p )

protectedvirtualinherited

The control itself is returned when p is in bounds and no child is hit.

Reimplemented from Widget.

Reimplemented in Workspace.

◆ onProcessEnableEvent()

virtual void onProcessEnableEvent ( const EnableEvent & ev )

protectedvirtualinherited

A disabled parent keeps every descendant effectively disabled.

Reimplemented from Widget.

Reimplemented in Workspace.

◆ onProcessMouseEvent()

virtual void onProcessMouseEvent ( const MouseEvent & ev )

protectedvirtualinherited

A press delivered to this control requests pointer capture until release. Overrides that retain child routing must call the base implementation.

Reimplemented from Widget.

Reimplemented in MenuBar, Workspace, TabView, and ComboBox.

◆ onProcessTouchEvent()

virtual void onProcessTouchEvent ( const TouchEvent & ev )

protectedvirtualinherited

A press delivered to this control requests pointer capture until release. Overrides that retain child routing must call the base implementation.

Reimplemented from Widget.

Reimplemented in Workspace, and TabView.

◆ onInit()

virtual void onInit ( Control & control )

protectedvirtualinherited

The base implementation connects it when necessary, sets its next responder and form association, propagates scaling, and requests relayout.

Reimplemented from View.

◆ onRelease()

virtual void onRelease ( Control & control )

protectedvirtualinherited

The base implementation removes its form association and next responder, disconnects it when necessary, and requests relayout.

Reimplemented from View.

◆ toControl()

Gfx::PointF toControl	(	const Control &	control,
		const Gfx::PointF &	pos
	)		const

inherited

The default conversion subtracts the control position. Override onToControl() when the hosted control uses a different coordinate mapping.

◆ fromControl()

Gfx::PointF fromControl	(	const Control &	control,
		const Gfx::PointF &	pos
	)		const

inherited

The default conversion adds the control position. Override onFromControl() when the hosted control uses a different coordinate mapping.

◆ surface()

PaintSurface& surface ( )

inherited

The adapter exposes this view's size, scaling, and position on the surface assigned with setSurface(). It remains available while no parent surface is assigned, but cannot then obtain a canvas.

◆ setSurface()

void setSurface	(	PaintSurface *	surface,
		const Gfx::PointF &	pos = `Gfx::PointF()`
	)

inherited

The view borrows surface and does not destroy it. Pass null to detach the view from its parent surface. pos identifies this view's origin in the assigned surface and is used to establish child-control surface positions.

◆ setNextResponder()

void setNextResponder ( Responder * r )

inherited

The widget does not own r. Do not create a responder cycle.

◆ hitTest()

Widget* hitTest ( const Gfx::PointF & pos )

inherited

Returns 0 when no descendant is hit. Derived classes implement their child hit-testing policy in onHitTest().

◆ toGlobal()

Gfx::PointF toGlobal ( const Gfx::PointF & pos ) const

inherited

The default conversion walks the parent chain.

◆ fromGlobal()

Gfx::PointF fromGlobal ( const Gfx::PointF & pos ) const

inherited

The default conversion walks the parent chain.

◆ addPeer()

void addPeer ( Widget & peer )

inherited

Peers are not a parent, child, or screen connection and do not transfer ownership. Add a relationship only once. Both endpoints receive onAttachPeer().

◆ removePeer()

void removePeer ( Widget & peer )

inherited

Both endpoints receive onDetachPeer().

◆ invalidate()

void invalidate ( )

inherited

The Forms event loop eventually calls onInvalidateEvent() after all pending invalidation requests for this widget have coalesced.

◆ repaint()

virtual void repaint ( const Gfx::RectF & rect )

virtualinherited

The containing view, frame, or backend converts and forwards the rectangle. This does not paint synchronously.

◆ show()

virtual void show ( bool b = true )

virtualinherited

isVisible() changes only when the request is confirmed by a ShowEvent.

◆ enable()

virtual void enable ( bool isEnable = true )

virtualinherited

isEnabled() changes only when the request is confirmed by an EnableEvent.

◆ activate()

void activate ( bool active = true )

inherited

Activation is defined by the receiving parent, frame, or backend.

◆ move()

virtual void move ( const Gfx::PointF & pos )

virtualinherited

position() changes only when a MoveEvent confirms the request.

◆ minimumSize()

const Gfx::SizeF& minimumSize ( ) const

inherited

New widgets use (0, 0).

◆ setMinimumSize()

void setMinimumSize ( const Gfx::SizeF & s )

inherited

This does not resize the widget or validate it against the maximum size. The receiver of onSetSizeLimits() applies the limits.

◆ maximumSize()

const Gfx::SizeF& maximumSize ( ) const

inherited

New widgets use (64000, 64000).

◆ setMaximumSize()

void setMaximumSize ( const Gfx::SizeF & s )

inherited

This does not resize the widget or validate it against the minimum size. The receiver of onSetSizeLimits() applies the limits.

◆ resize()

virtual void resize ( const Gfx::SizeF & s )

virtualinherited

size() and bounds() change only when a ResizeEvent confirms the request.

◆ setCapture()

void setCapture ( bool capture )

inherited

Capture is owned by the application and routes pointer input to this widget until released. It is released during destruction.

◆ cursor()

const Cursor* cursor ( ) const

inherited

The returned cursor is always non-null and is owned by the widget or the Forms runtime.

◆ setCursor()

void setCursor ( const Cursor * c )

inherited

Pass 0 to remove the override and restore the default cursor. The cursor is copied, so the caller retains ownership of c. When this widget is under the pointer, the platform cursor is updated immediately.

◆ processEvent()

void processEvent ( const Pt::Event & ev )

inherited

Use the state-request APIs for ordinary operation. This method is for backends, tests, and code that deliberately injects events.

◆ eventReceived()

Pt::Signal<const Pt::Event&>& eventReceived ( )

inherited

Internal event-processing slots are connected to this signal. Additional slots can observe or process deliberately dispatched widget events.

◆ onSetParent()

virtual void onSetParent ( Widget * parent )

protectedvirtualinherited

Container classes call this while attaching or detaching the widget. Overrides that retain the base relationship must call this implementation.

◆ onToGlobal()

virtual Gfx::PointF onToGlobal ( const Gfx::PointF & pos ) const

protectedvirtualinherited

The base implementation walks the parent chain through onToParent().

Implements Responder.

Reimplemented in Screen.

◆ onFromGlobal()

virtual Gfx::PointF onFromGlobal ( const Gfx::PointF & pos ) const

protectedvirtualinherited

The base implementation walks the parent chain through onFromParent().

Implements Responder.

Reimplemented in Screen.

◆ onAttachPeer()

virtual void onAttachPeer ( Widget & peer )

protectedvirtualinherited

The base implementation stores the peer. Overrides that retain the association must call this implementation.

Reimplemented in Popup.

◆ onDetachPeer()

virtual void onDetachPeer ( Widget & peer )

protectedvirtualinherited

The base implementation removes one stored association. Overrides that retain the association must call this implementation.

Reimplemented in Popup.

◆ mouseEvent()

bool mouseEvent ( const MouseEvent & ev )

inherited

Converts the position to each responder's local coordinates. Returns true when a responder handles the event.

◆ touchEvent()

void touchEvent ( const TouchEvent & ev )

inherited

Converts the position to each responder's local coordinates.

The Power in your Hands

Public Types

Public Member Functions

Protected Member Functions

Detailed Description

Member Enumeration Documentation

◆ FocusPolicy

Member Function Documentation

◆ setParent()

◆ unparent()

◆ add()

◆ remove()

◆ setFocusPolicy()

◆ setFocusIndex()

◆ focus()

◆ setActionKey()

◆ setShortcut()

◆ setMnemonic() [1/2]

◆ setMnemonic() [2/2]

◆ setMnemonicControl()

◆ processShortcut()

◆ processMnemonic()

◆ acceptsInput()

◆ raise()

◆ onInvalidateEvent()

◆ onInvalidate()

◆ onProcessPaintEvent()

◆ onPaintEvent()

◆ onPaint()

◆ setSizePolicy()

◆ measure()

◆ relayout()

◆ onMeasure()

◆ onProcessLayoutEvent()

◆ onLayout()

◆ onSetSurface()

◆ onHitTest()

◆ onProcessEnableEvent()

◆ onProcessMouseEvent()

◆ onProcessTouchEvent()

◆ onInit()

◆ onRelease()

◆ toControl()

◆ fromControl()

◆ surface()

◆ setSurface()

◆ setNextResponder()

◆ hitTest()

◆ toGlobal()

◆ fromGlobal()

◆ addPeer()

◆ removePeer()

◆ invalidate()

◆ repaint()

◆ show()

◆ enable()

◆ activate()

◆ move()

◆ minimumSize()

◆ setMinimumSize()

◆ maximumSize()

◆ setMaximumSize()

◆ resize()

◆ setCapture()

◆ cursor()

◆ setCursor()

◆ processEvent()

◆ eventReceived()

◆ onSetParent()

◆ onToGlobal()

◆ onFromGlobal()

◆ onAttachPeer()

◆ onDetachPeer()

◆ mouseEvent()

◆ touchEvent()