DsDropList Class Reference

DsDropList is a class that implements a drop-down list. More...

#include <ds_droplist.h>

Inheritance diagram for DsDropList:

Classes
class	Listener
	Listener is an interface class that receives requests and events from the list view. More...

Public Member Functions
	DsDropList (DsView *parent, const DsPoint &pos, const DsSize &size, uint32_t maximum_height, const ds_bitmap_font_t *font)
	Creates a DsDropList object.
void	setListener (Listener *listener)
	Sets the DsDropList event listener.
void	setListColors (DsColor color, DsColor color_selected)
	Sets the list row colors.
void	setTextColors (DsColor color, DsColor color_selected)
	Sets the list text colors.
void	setBorderColor (DsColor color)
	Sets the border color.
void	setBorderThickness (uint8_t thickness)
	Sets the border thickness.
void	setButtonColor (DsColor color)
	Sets the expand button color.
void	setScrollBarColor (DsColor color)
	Sets the color of the scroll bar.
void	expand (void)
	Sets the drop list in the expanded state.
void	fold (void)
	Sets the drop list in the folded state.
Public Member Functions inherited from DsView
	DsView (DsView *parent, const DsPoint &pos=DsPoint(), const DsSize &size=DsSize())
	Creates a DsView with an optional position and size.
	DsView (DsView *parent, DsOrientation layout_orientation)
	Creates a DsView with the auto-layout mode active. This view can align it's children automatically.
void	addChild (DsView *view)
	Adds a child to the current DsView.
void	removeChild (DsView *view)
	Removes a child to the current DsView.
void	removeAllChildren (void)
	Removes all children of the current DsView.
void	bringFront (void)
	Brings the current view to the top of the drawing order.
void	sendBack (void)
	Sends the current view to the bottom of the drawing order.
DsView *	getParent (void) const
	Returns the parent of the current view.
void	setParent (DsView *parent)
	Sets a new parent to the view.
const DsPoint &	getPosition (void) const
	Returns the position of the view in parent coordinates.
DsFPoint	getCenterPoint (void) const
	Returns the center point of the view in current coordinates.
DsPoint	translatePositionInParentCoordinates (const DsView *parent, DsPoint pos) const
	Translates position (x, y) in parent coordinate system.
DsPoint	translatePositionInParentCoordinates (uint32_t parent_level, DsPoint pos) const
	Translates position (x, y) in parent coordinate system.
DsPoint	getPositionInParentCoordinates (const DsView *parent) const
	Returns the position in the parent's coordinate system.
void	setPosition (const DsPoint &pos)
	Sets the position of the view in parent coordinates.
void	setCenterPosition (const DsPoint &pos)
	Sets the position of the center of the view in parent coordinates.
void	centerVertically (DsView *view)
	Aligns vertically the center of the current view with the center of another view.
void	centerHorizontally (DsView *view)
	Aligns horizontally the center of the current view with the center of another view.
const DsSize &	getParentSize (void) const
	Returns the size of the parent view.
const DsSize &	getSize (void) const
	Returns the size of the view.
void	setMinimumSize (const DsSize &size)
	Returns the minimum size of the view.
void	setSize (const DsSize &size)
	Sets the size of the view.
void	setWidth (int32_t width)
	Sets the width of the view.
void	setHeight (int32_t height)
	Sets the height of the view.
DsRect	getRegion (void) const
	Returns a rectangle describing the space occupied by the current view in it's own coordinate system (X and Y coordinates are 0).
DsRect	getRegionInParentCoordinates (const DsView *parent) const
	Returns a rectangle describing the space occupied by the current view in the parent's coordinate system.
void	alignInParent (void)
	Aligns the view relative to it's parent.
void	alignInParent (const DsAlignment &alignment, int32_t padding_top, int32_t padding_left, int32_t padding_bottom, int32_t padding_right)
	Aligns the view relative to it's parent.
DsView *	setPaddingTop (int16_t padding, uint16_t proportion=0)
	Sets the top padding used by the auto-layout.
DsView *	setPaddingBottom (int16_t padding, uint16_t proportion=0)
	Sets the bottom padding used by the auto-layout.
DsView *	setPaddingLeft (int32_t padding, uint16_t proportion=0)
	Sets the left padding used by the auto-layout.
DsView *	setPaddingRight (int16_t padding, uint16_t proportion=0)
	Sets the right padding used by the auto-layout.
DsView *	setPadding (int16_t padding, uint16_t proportion=0)
	Sets the padding used by the auto-layout.
DsView *	setPaddingHorizontal (int16_t padding, uint16_t proportion=0)
	Sets the horizontal padding used by the auto-layout.
DsView *	setPaddingVertical (int16_t padding, uint16_t proportion=0)
	Sets the vertical padding used by the auto-layout.
DsView *	setProportion (uint32_t proportion)
	Sets the view proportion used by the auto-layout.
DsAlignment	getParentAlignment (void) const
	Returns parent alignment mode of the view.
DsView *	setParentAlignment (const DsAlignment &alignment)
	Sets parent alignment mode of the view.
void	reserveSpace (bool state)
	Configures if during auto-layout the view will reserve space even if it's hidden.
void	setAutoLayout (DsOrientation orientation, bool enable)
	Enables or disables the auto-layout mode and sets the primary orientation.
virtual DsSize	fitContent (void)
	Calculates the minimum size required by the view.
void	doLayout (void)
	Runs the auto-layout algorithm.
void	setBackgroundColor (DsColor color)
	Sets the background color of the view.
void	setBackgroundImage (const DsSurface *surface)
	Sets the background image.
void	setPanelColor (DsColor color)
	Sets the color of the panel.
void	setPanelBorderColor (DsColor color)
	Sets the color of the panel border.
void	setPanelCornerRadius (uint16_t radius)
	Sets the radius of the panel corners.
void	setPanelBorderThickness (uint8_t thickness)
	Sets the thickness of the panel border.
DsScreen &	getScreen (void)
	Returns a reference to the screen to which this view belongs.
bool	isFocused (void)
	Is the view focused?
bool	getIsVisible (void) const
	Is the view visibility enabled?
bool	isVisible (void) const
	Is the view actually visible on the screen?
bool	isParentVisible (void) const
	Is the parent view actually visible on the screen?
bool	show (void)
	Shortcut to setVisible(true).
bool	hide (void)
	Shortcut to setVisible(false).
bool	setVisible (bool is_visible)
	Changes the visibility of the view.
virtual void	onShow (void)
	This virtual method is called when the view becomes visible on the screen.
virtual void	onHide (void)
	This virtual method is called when the view becomes invisible (hidden) on the screen.
void	enable (bool state)
	Enables or disables the view.
bool	isEnabled (void) const
	Is the view enabled?
void	enableTouch (bool state)
	Enables or disables processing of touch events.
bool	isTouchEnabled (void) const
	Is the view enabled to process touch events?
void	sendTap (DsPoint pos)
	Sends a tap event to the view.
void	setOnTapCallback (const lambda< void(const DsPoint &p)> &cb)
	Sets the lambda to be executed when the user taps on the view.
void	setOnLongTapCallback (const lambda< void(const DsPoint &p)> &cb)
	Sets the lambda to be executed when the user taps the view and holds for a specific time (set with setLongTapDetection()).
void	setOnTouchActiveCallback (const lambda< void(const DsPoint &p)> &cb)
	Sets the lambda to be executed when the user touches the view.
void	setOnTouchReleaseCallback (const lambda< void(void)> &cb)
	Sets the lambda to be executed when the user touch is released.
void	setLongTapDetection (uint32_t delay_ms)
	Configures the long tap detection.
bool	isInputInside (void) const
	Returns if there is user input (touch) inside the view.
const DsPoint &	getTouchPosition (void) const
	Returns the location of the user touch input inside the view.
void	enableHorizontalScroll (bool state)
	Enables or disables the horizontal scroll of the view contents.
void	enableVerticalScroll (bool state)
	Enables or disables the vertical scroll of the view contents.
void	setScrollbarColor (DsColor color)
	Configure the color of the scroll bars.
virtual void	invalidate (void)
	Invalidates the view.
virtual void	invalidateRegion (DsRect region)
	Invalidates only a region of the view.
void	addStateObserver (StateObserver *observer)
	Adds a state observer object.
void	removeStateObserver (StateObserver *observer)
	Removes a state observer object.
Public Member Functions inherited from DsSelectionBase
void	setSelection (int32_t selection)
	Sets the selection value.
int32_t	getSelection (void) const
	Returns the selection value.
void	setOnChangeCallback (const lambda< void(int32_t selection, bool in_motion, bool user_input)> &cb)

Additional Inherited Members
Protected Member Functions inherited from DsView
virtual void	onChildAdd (DsView *child)
	This virtual method will be called when a new child had been added to the view.
virtual void	onPaintOver (DsRenderer &renderer)
	This virtual method will be called when the view needs to repaint it's content, but after the view and it's children had been painted.
virtual void	onVSync (void)
	This virtual method is be called at every vertical sync period.
virtual void	onKeyboard (int32_t key)
	This virtual method is called when there is a keyboard event that needs to be processed.
void	inputCapture (void)
	Captures the touch input.
bool	isInputCaptured (void) const
	Is the input captured?
void	skipInput (void)
	Skips receiving touch inputs until the end of the current touch event.
void	forAllChildren (const lambda< void(DsView *child)> &lambda)
	Calls the supplied lambda for every view in the children list.
void	forAllChildrenBackwards (const lambda< void(DsView *child)> &lambda)
	Calls the supplied lambda for every view in the children list.
Protected Member Functions inherited from DsSelectionBase
void	notifySelectionChange (bool in_motion)
Protected Attributes inherited from DsView
DsPoint	mScrollPosition
DsPoint	mPreviousScrollPosition
DsPoint	mScrollPositionBase
DsColor	mScrollbarColor
DsPoint	mTouchPos
uint32_t	mTouchTimestamp
Protected Attributes inherited from DsSelectionBase
int32_t	mSelectionCount
int32_t	mSelection

Detailed Description

DsDropList is a class that implements a drop-down list.

The list can be in two states: folded or expanded. In the folded state, the list displays the selected item. In the expanded state, the list displays a number of items the user can select from. Scroll controls are also included. List entries can only be text labels.

Constructor & Destructor Documentation

DsDropList()

DsDropList::DsDropList	(	DsView *	parent,
		const DsPoint &	pos,
		const DsSize &	size,
		uint32_t	maximum_height,
		const ds_bitmap_font_t *	font
	)

Creates a DsDropList object.

Parameters

parent	The parent view
pos	The position of the view in the parent coordinate system
size	The size of the view
maximum_height	Maximum height of the expanded list
font	Font used for rendering the row text labels

Member Function Documentation

setBorderColor()

void DsDropList::setBorderColor

(

DsColor

color

)

Sets the border color.

Parameters

color

Border color

setBorderThickness()

void DsDropList::setBorderThickness

(

uint8_t

thickness

)

Sets the border thickness.

Parameters

thickness

Border thickness in pixels

setButtonColor()

void DsDropList::setButtonColor

(

DsColor

color

)

Sets the expand button color.

Parameters

color

Button color

setListColors()

void DsDropList::setListColors	(	DsColor	color,
		DsColor	color_selected
	)

Sets the list row colors.

Parameters

color	Color of the unselected list row
color_selected	Color of the selected list row

setListener()

void DsDropList::setListener

(

Listener *

listener

)

Sets the DsDropList event listener.

Parameters

listener

Pointer to a user implemented object of type derived from DsDropList::Listener

setScrollBarColor()

void DsDropList::setScrollBarColor

(

DsColor

color

)

Sets the color of the scroll bar.

Parameters

color

Scroll bar color. If the alpha channel is set to zero, the scroll bar will not be rendered.

setTextColors()

void DsDropList::setTextColors	(	DsColor	color,
		DsColor	color_selected
	)

Sets the list text colors.

Parameters

color	Color of the unselected list row text
color_selected	Color of the selected list row text

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The documentation for this class was generated from the following file:

• inc/ds_droplist.h