ListLayout

touchgfx/containers/ListLayout.hpp

This class provides a layout mechanism for arranging Drawable instances adjacent in the specified Direction. The first element in the ListLayout is positioned in the ListLayout origin (0,0). The dimensions of this class is automatically expanded to cover the area of the added Drawable instances, which may grow larger than the dimensions of the physical screen. Place the ListLayout inside e.g. a ScrollableContainer to allow all the children to be viewed.

See: ScrollableContainer

Inherits from: Container, Drawable

Public Functions

virtual void	add(Drawable & d)
	Adds a Drawable instance to the end of the list.
virtual Direction	getDirection() const
	Gets the direction of the ListLayout.
virtual void	insert(Drawable * previous, Drawable & d)
	Inserts a Drawable after a specific child node.
	ListLayout(const Direction d =SOUTH)
	Initializes a new instance of the ListLayout class.
virtual void	remove(Drawable & d)
	Removes a Drawable.
virtual void	removeAll()
	Removes all children in the Container by resetting their parent and sibling pointers.
virtual void	setDirection(const Direction d)
	Sets the direction of the ListLayout.

Additional inherited members

Public Functions inherited from Container

	Container()
virtual bool	contains(const Drawable & d)
	Query if a given Drawable has been added directly to this Container.
virtual void	draw(const Rect & invalidatedArea) const
	Draw this drawable.
virtual void	forEachChild(GenericCallback< Drawable & > * function)
	Executes the specified callback function for each child in the Container.
virtual Drawable *	getFirstChild()
	Obtain a pointer to the first child of this container.
virtual void	getLastChild(int16_t x, int16_t y, Drawable ** last)
	Gets the last child in the list of children in this Container.
virtual void	getLastChildNear(int16_t x, int16_t y, Drawable * last, int16_t fingerAdjustmentX, int16_t * fingerAdjustmentY)
	Works similar to getLastChild() but also considers the current set finger size in HAL.
virtual Rect	getSolidRect() const
	Get (the largest possible) rectangle that is guaranteed to be solid (opaque).
virtual void	unlink()
	Removes all children by unlinking the first child.

Protected Functions inherited from Container

virtual Rect	getContainedArea() const
	Gets a rectangle describing the total area covered by the children of this container.
virtual void	moveChildrenRelative(int16_t deltaX, int16_t deltaY)
	Calls moveRelative on all children.

Protected Attributes inherited from Container

Drawable *	firstChild
	Pointer to the first child of this container. Subsequent children can be found through firstChild's nextSibling.

Public Functions inherited from Drawable

void	center()
	Centers the Drawable inside its parent.
void	centerX()
	Center the Drawable horizontally inside its parent.
void	centerY()
	Center the Drawable vertically inside its parent.
virtual void	childGeometryChanged()
	This function can be called on parent nodes to signal that the size or position of one or more of its children has changed.
virtual void	draw(const Rect & invalidatedArea) const =0
	Draw this drawable.
	Drawable()
	Initializes a new instance of the Drawable class.
void	drawToDynamicBitmap(BitmapId id)
	Render the Drawable object into a dynamic bitmap.
void	expand(int margin =0)
	Expands the Drawable to have the same size as its parent with a given margin around the edge.
Rect	getAbsoluteRect() const
	Helper function for obtaining the rectangle this Drawable covers, expressed in absolute coordinates.
virtual Drawable *	getFirstChild()
	Function for obtaining the first child of this drawable if any.
int16_t	getHeight() const
	Gets the height of this Drawable.
virtual void	getLastChild(int16_t x, int16_t y, Drawable ** last) =0
	Function for obtaining the the last child of this drawable that intersects with the specified point.
Drawable *	getNextSibling()
	Gets the next sibling node.
Drawable *	getParent() const
	Returns the parent node.
const Rect &	getRect() const
	Gets the rectangle this Drawable covers, in coordinates relative to its parent.
virtual Rect	getSolidRect() const =0
	Get (the largest possible) rectangle that is guaranteed to be solid (opaque).
virtual Rect	getSolidRectAbsolute()
	Helper function for obtaining the largest solid rect (as implemented by getSolidRect()) expressed in absolute coordinates.
virtual void	getVisibleRect(Rect & rect) const
	Function for finding the visible part of this drawable.
int16_t	getWidth() const
	Gets the width of this Drawable.
int16_t	getX() const
	Gets the x coordinate of this Drawable, relative to its parent.
int16_t	getY() const
	Gets the y coordinate of this Drawable, relative to its parent.
virtual void	handleClickEvent(const ClickEvent & event)
	Defines the event handler interface for ClickEvents.
virtual void	handleDragEvent(const DragEvent & event)
	Defines the event handler interface for DragEvents.
virtual void	handleGestureEvent(const GestureEvent & event)
	Defines the event handler interface for GestureEvents.
virtual void	handleTickEvent()
	Called periodically by the framework if the Drawable instance has subscribed to timer ticks.
virtual void	invalidate() const
	Tell the framework that this entire Drawable needs to be redrawn.
virtual void	invalidateContent() const
	Tell the framework that the contents of the Drawable needs to be redrawn.
virtual void	invalidateRect(Rect & invalidatedArea) const
	Request that a region of this drawable is redrawn.
bool	isTouchable() const
	Gets whether this Drawable receives touch events or not.
bool	isVisible() const
	Gets whether this Drawable is visible.
virtual void	moveRelative(int16_t x, int16_t y)
	Moves the drawable.
virtual void	moveTo(int16_t x, int16_t y)
	Moves the drawable.
virtual void	setHeight(int16_t height)
	Sets the height of this drawable.
void	setPosition(const Drawable & drawable)
	Sets the position of the Drawable to the same as the given Drawable.
void	setPosition(int16_t x, int16_t y, int16_t width, int16_t height)
	Sets the size and position of this Drawable, relative to its parent.
void	setTouchable(bool touch)
	Controls whether this Drawable receives touch events or not.
void	setVisible(bool vis)
	Controls whether this Drawable should be visible.
virtual void	setWidth(int16_t width)
	Sets the width of this drawable.
void	setWidthHeight(const Bitmap & bitmap)
	Sets the dimensions (width and height) of the Drawable without changing the x and y coordinates).
void	setWidthHeight(const Drawable & drawable)
	Sets the dimensions (width and height) of the Drawable without changing the x and y coordinates).
void	setWidthHeight(const Rect & other)
	Sets the dimensions (width and height) of the Drawable without changing the x and y coordinates).
void	setWidthHeight(int16_t width, int16_t height)
	Sets the dimensions (width and height) of the Drawable without changing the x and y coordinates).
virtual void	setX(int16_t x)
	Sets the x coordinate of this Drawable, relative to its parent.
void	setXY(const Drawable & drawable)
	Sets the x and y coordinates of this Drawable.
void	setXY(int16_t x, int16_t y)
	Sets the x and y coordinates of this Drawable, relative to its parent.
virtual void	setY(int16_t y)
	Sets the y coordinate of this Drawable, relative to its parent.
virtual void	translateRectToAbsolute(Rect & r) const
	Helper function for converting a region of this Drawable to absolute coordinates.
virtual	~Drawable()
	Finalizes an instance of the Drawable class.

Protected Attributes inherited from Drawable

Drawable *	nextSibling
	Pointer to the next Drawable.
Drawable *	parent
	Pointer to this drawable's parent.
Rect	rect
	The coordinates of this Drawable, relative to its parent.
bool	touchable
	True if this drawable should receive touch events.
bool	visible
	True if this drawable should be drawn.

Public Functions Documentation

add

virtual void add	(	Drawable &	d	)

Adds a Drawable instance to the end of the list.

The Drawable dimensions shall be set prior to addition. The coordinates of the Drawable will be updated to reflect the position in the ListLayout.

Parameters:

d	The Drawable to add.

Reimplements: touchgfx::Container::add

getDirection

virtual Direction getDirection	(			)	const

Gets the direction of the ListLayout.

Returns:

The current direction to grow in when added children (either SOUTH or EAST).

See also:

setDirection

insert

virtual void insert	(	Drawable *	previous ,
		Drawable &	d
		)

Inserts a Drawable after a specific child node.

If previous child node is 0, the drawable will be inserted as the first element in the list. The first element in the list of children is the element drawn first, so this makes it possible to insert a Drawablebehind all previously added children.

Parameters:

previous	The Drawable to insert after. If null, insert as header.
d	The Drawable to insert.

Note

As with add, do not add the same drawable twice.

Reimplements: touchgfx::Container::insert

ListLayout

ListLayout	(	const Direction	d =SOUTH	)

Initializes a new instance of the ListLayout class.

Parameters:

d	(Optional) The direction to place the elements. SOUTH (Default) places the elements vertically, EAST places the elements horizontally.

See also:

setDirection

remove

virtual void remove	(	Drawable &	d	)

Removes a Drawable.

Safe to call even if drawable has not been added. Other Drawable elements in the ListLayout are repositioned and the size of the ListLayout is adjusted.

Parameters:

d	The drawable to remove.

Reimplements: touchgfx::Container::remove

removeAll

virtual void removeAll	(			)

Removes all children in the Container by resetting their parent and sibling pointers.

Please note that this is not done recursively, so any child which is itself a Container is not emptied.

Reimplements: touchgfx::Container::removeAll

setDirection

virtual void setDirection	(	const Direction	d	)

Sets the direction of the ListLayout.

If elements have already been added to the ListLayout, these elements will be repositioned to adhere to the new direction.

Parameters:

d	The new Direction to grow in when added children (either SOUTH or EAST).

See also:

getDirection