A scrollable, resizable grid component that displays buttons in a structured layout. More...

#include <ButtonGrid.h>

Inheritance diagram for ButtonGrid:

Public Member Functions
	ButtonGrid ()
	Constructor. Initializes the grid.
virtual	~ButtonGrid ()
	Destructor. Cleans up any allocated resources.
void	clear ()
	Clears all items from the grid.
void	setMinColumnWidth (long minWidth)
	Sets the minimum width for columns in the grid layout.
void	setTitle (const wstring &title)
	Sets the grid's title.
void	setImagePosition (const Direction &imagePosition)
	Sets the position of the image displayed on the button.
long	addButton (const wstring &itemText, const IconSource &iconSource=IconSource())
	Adds a button to the grid.
void	enableButton (const wstring &itemText, BOOL enabled=TRUE)
	enables/disabled button.
void	onWindowResized ()
	Handles window resize events and recalculates layout.
void	onPaint (Graphics *g)
	Paints the button grid on the screen.
BOOL	getScrollingInfo (__int64 &scrollMin, __int64 &scrollMax, __int64 &pageSize)
	Retrieves scroll range and page size information.
void	setScrollbarTopOffset (__int64 firstVisibleRow)
	Sets the top row index for vertical scrollbar.
void	addActionListener (ActionListener *l)
	Registers an ActionListener to receive item click events.
Keyboard Navigation
void	onArrowUp (BOOL shiftPressed, BOOL ctrlPressed)
void	onArrowDown (BOOL shiftPressed, BOOL ctrlPressed)
void	onPageUp (BOOL shiftPressed, BOOL ctrlPressed)
void	onPageDown (BOOL shiftPressed, BOOL ctrlPressed)
void	onKeyHome (BOOL shiftPressed, BOOL ctrlPressed)
void	onKeyEnd (BOOL shiftPressed, BOOL ctrlPressed)
Mouse Events
void	onMousePressed (WinHandle hWnd, int x, int y, int clickCount, BOOL shiftPressed, BOOL ctrlPressed)
	Called when the mouse is pressed within the component.
void	onMouseReleased (WinHandle hWnd, int x, int y, BOOL shiftPressed, BOOL ctrlPressed)
	Called when the mouse button is released within the component.
void	onMouseRightClicked (WinHandle hWnd, int x, int y, BOOL shiftPressed, BOOL ctrlPressed)
	Called when the right mouse button is clicked within the component.
BOOL	onMouseWheel (WinHandle hWnd, int x, int y, int delta)
	Called when the mouse wheel is used over the component.
Public Member Functions inherited from Component
	Component ()
	Constructs a new Component instance.
virtual	~Component ()
	Virtual destructor.
long	getId ()
	Gets the unique ID assigned to this component.
void	setParent (Component *parent)
Component *	getParent ()
wstring	getComponentType ()
	Gets the component type string.
BOOL	isWindowCreated ()
	Returns whether the native window has been created.
WinHandle	getWindowHandle ()
	Returns the native WinHandle for this component.
int	createComponent (WinHandle hParent, Bounds rect, long nCmd=-1, BOOL isVisible=TRUE)
	Creates the component's native window as a child of hParent.
void	setFont (long fontSize, BOOL isBold=FALSE, BOOL isItalic=FALSE, BOOL isUnderlined=FALSE, const wstring &fontName=L"Arial")
	Sets the font for the component.
void	showBorder (BOOL bShow=TRUE)
void	setEnabled (BOOL bEnable=TRUE)
	Enables or disables the component.
void	setVisible (BOOL bShow=TRUE)
	Shows or hides the component.
void	GetClientRect (Bounds &rect)
void	GetWindowRect (Bounds &rect)
void	moveWindow (long x, long y, long width, long height, BOOL bRedraw=TRUE)
	Moves and resizes the component window.
void	reconfigureScrollBar ()
	Forces the component to recalculate the scrollbar info.
void	setMouseWheelDelta (int delta)
	Sets the accumulated mouse wheel delta.
int	getMouseWheelDelta ()
	Gets the current mouse wheel delta.
virtual int	getMinimumHeight ()
	Returns the minimum height the component can have.
virtual int	getPreferredHeight ()
	Returns the preferred height of the component.
void	repaint (WinHandle hWnd=NULL)
	Requests the component to repaint itself.
void	clearQueuedPaintRequest ()
	clears the queued paint request. This function should only be called internally from the library.
virtual void	onWindowMoved ()
	Called when the component's window is moved.
virtual void	onAction (WinHandle hTarget, long actionId, const ProcParams &procParams)
	Called when an action occurs on the component.
virtual void	onSelectionChanged (WinHandle hTarget, int itemIndex, const wstring &itemText, BOOL itemChecked, const ProcParams &procParams)
	Called when the selection changes.
virtual void	onDataChanged (WinHandle hTarget, const wstring &newValue, const ProcParams &procParams)
	Called when data changes in the component.
virtual BOOL	onHorzScroll (WinHandle hTarget, const ProcParams &procParams)
	Called on horizontal scroll events.
virtual BOOL	onDrawMeasureItem (LPMEASUREITEMSTRUCT dis, const ProcParams &procParams)
	Called when measuring an item for owner-draw controls.
virtual BOOL	onDrawItem (LPDRAWITEMSTRUCT dis, const ProcParams &procParams)
	Called when drawing an item for owner-draw controls.
virtual void	onMouseMoved (WinHandle hWnd, int x, int y, BOOL shiftPressed, BOOL ctrlPressed)
	Called when the mouse is moved within the component.
virtual void	onArrowLeft (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onArrowRight (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyInsert (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyDelete (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyBackSpace (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyTyped (wchar_t ch, BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyTab (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyEnter (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyF1 (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyF2 (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyF3 (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyF4 (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyF5 (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyF6 (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyF7 (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyF8 (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyF9 (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyF10 (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyF11 (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onKeyF12 (BOOL shiftPressed, BOOL ctrlPressed)
virtual void	onFocusGained ()
	Called when the component gains keyboard focus.
virtual void	onFocusLost ()
	Called when the component loses keyboard focus.
virtual void	onTimer (unsigned int timerId)
	Called on timer events.
void	updateScrollbarTopOffset (__int64 firstVisibleRow)
	Updates the scrollbar's top offset based on the current first visible row.

Protected Member Functions
BOOL	getCreateWindowOptions (wstring &title, UINT &windowStyles, wstring &wndClassName, BOOL &isCustomWndProc)
	Sets the options used to create the native window.
void	windowCreated ()
	Called when the window is created.
Protected Member Functions inherited from Component
long	getActionId ()
	Returns the component's action command ID.
void	doNotSubclass ()
	Marks this component's native window to avoid subclassing.
void	startTimer (unsigned int timerId, unsigned int milliseconds)
	Starts a timer with the given ID and interval.
void	stopTimer (unsigned int timerId)
	Stops the timer identified by timerId.
void	protectedAddDataChangedListener (DataChangeListener *l)
	Adds a data change listener.
void	protectedAddSelectionChangedListener (SelectionChangeListener *l)
	Adds a selection change listener.
void	protectedAddActionListener (ActionListener *l)
	Adds an action listener.
void	protectedAddItemDoubleClickedListener (RowDoubleClickListener *l)
	Adds a row double-click listener.
void	protectedFireDataChangedEvent (const wstring &oldValue, const wstring &newValue)
	Fires a data changed event to registered listeners.
void	protectedFireSelectionChangedEvent (long selectionIndex=-1, const wstring &selectionValue=L"", BOOL checked=FALSE)
	Fires a selection changed event to registered listeners.
void	protectedFireActionEvent (long actionId=-1, const wstring &actionName=L"")
	Fires an action event to registered listeners.
void	protectedFireItemDoubleClickedEvent (__int64 rowIndex)
	Fires a row double-click event to registered listeners.

Additional Inherited Members
Protected Attributes inherited from Component
WinHandle	_hWnd
	Handle to the native window associated with this component.
wstring	_componentType
	String representing the component type (e.g., "Button", "ComboBox").
BOOL	_showBorder

Detailed Description

A scrollable, resizable grid component that displays buttons in a structured layout.

The ButtonGrid class allows dynamic addition of buttons (with optional images), automatic layout adjustment based on window size, and user interaction through mouse and keyboard. It supports vertical scrolling, selection tracking, and event listeners for user actions.

Constructor & Destructor Documentation

◆ ButtonGrid()

ButtonGrid::ButtonGrid ( )

Constructor. Initializes the grid.

◆ ~ButtonGrid()

virtual ButtonGrid::~ButtonGrid ( )

virtual

Destructor. Cleans up any allocated resources.

Member Function Documentation

◆ addActionListener()

void ButtonGrid::addActionListener ( ActionListener * l )

Registers an ActionListener to receive item click events.

Parameters

l	Pointer to the listener.

◆ addButton()

long ButtonGrid::addButton	(	const wstring &	itemText,
		const IconSource &	iconSource = IconSource() )

Adds a button to the grid.

Parameters

itemText	The button's display text.
imageFile	Optional image file path to show on the button.

Returns: The index of the added item.

◆ clear()

void ButtonGrid::clear ( )

Clears all items from the grid.

◆ enableButton()

void ButtonGrid::enableButton	(	const wstring &	itemText,
		BOOL	enabled = TRUE )

enables/disabled button.

Parameters

itemText	text of the item.
enabled	TRUE to enable, FALSE to disable the item.

◆ getCreateWindowOptions()

BOOL ButtonGrid::getCreateWindowOptions	(	wstring &	title,
		UINT &	windowStyles,
		wstring &	wndClassName,
		BOOL &	isCustomWndProc )

protectedvirtual

Sets the options used to create the native window.

Parameters

[out]	title	Window title.
[out]	windowStyles	Window style flags.
[out]	wndClassName	Name of the window class.
[out]	isCustomWndProc	Whether a custom window procedure is used.

Returns: TRUE if options were successfully set.

Implements Component.

◆ getScrollingInfo()

BOOL ButtonGrid::getScrollingInfo	(	__int64 &	scrollMin,
		__int64 &	scrollMax,
		__int64 &	pageSize )

virtual

Retrieves scroll range and page size information.

Parameters

[out]	scrollMin	Minimum scroll value.
[out]	scrollMax	Maximum scroll value.
[out]	pageSize	Page size in scroll units.

Returns: TRUE if successful.

Reimplemented from Component.

◆ onArrowDown()

void ButtonGrid::onArrowDown	(	BOOL	shiftPressed,
		BOOL	ctrlPressed )

virtual

Reimplemented from Component.

◆ onArrowUp()

void ButtonGrid::onArrowUp	(	BOOL	shiftPressed,
		BOOL	ctrlPressed )

virtual

Reimplemented from Component.

◆ onKeyEnd()

void ButtonGrid::onKeyEnd	(	BOOL	shiftPressed,
		BOOL	ctrlPressed )

virtual

Reimplemented from Component.

◆ onKeyHome()

void ButtonGrid::onKeyHome	(	BOOL	shiftPressed,
		BOOL	ctrlPressed )

virtual

Reimplemented from Component.

◆ onMousePressed()

void ButtonGrid::onMousePressed	(	WinHandle	hWnd,
		int	x,
		int	y,
		int	clickCount,
		BOOL	shiftPressed,
		BOOL	ctrlPressed )

virtual

Called when the mouse is pressed within the component.

Reimplemented from Component.

◆ onMouseReleased()

void ButtonGrid::onMouseReleased	(	WinHandle	hWnd,
		int	x,
		int	y,
		BOOL	shiftPressed,
		BOOL	ctrlPressed )

virtual

Called when the mouse button is released within the component.

Reimplemented from Component.

◆ onMouseRightClicked()

void ButtonGrid::onMouseRightClicked	(	WinHandle	hWnd,
		int	x,
		int	y,
		BOOL	shiftPressed,
		BOOL	ctrlPressed )

virtual

Called when the right mouse button is clicked within the component.

Reimplemented from Component.

◆ onMouseWheel()

BOOL ButtonGrid::onMouseWheel	(	WinHandle	hWnd,
		int	x,
		int	y,
		int	delta )

virtual

Called when the mouse wheel is used over the component.

Parameters

hWnd	Handle to the window receiving the event.
x	X coordinate of the mouse.
y	Y coordinate of the mouse.
delta	Mouse wheel delta.

Returns: TRUE if the event was handled, FALSE otherwise.

Reimplemented from Component.

◆ onPageDown()

void ButtonGrid::onPageDown	(	BOOL	shiftPressed,
		BOOL	ctrlPressed )

virtual

Reimplemented from Component.

◆ onPageUp()

void ButtonGrid::onPageUp	(	BOOL	shiftPressed,
		BOOL	ctrlPressed )

virtual

Reimplemented from Component.

◆ onPaint()

void ButtonGrid::onPaint ( Graphics * g )

virtual

Paints the button grid on the screen.

Parameters

hDC	Handle to the device context.

Reimplemented from Component.

◆ onWindowResized()

void ButtonGrid::onWindowResized ( )

virtual

Handles window resize events and recalculates layout.

Reimplemented from Component.

◆ setImagePosition()

void ButtonGrid::setImagePosition ( const Direction & imagePosition )

Sets the position of the image displayed on the button.

Parameters

imagePosition The position of the image displayed on the button (e.g. left|top|right|bottom).

◆ setMinColumnWidth()

void ButtonGrid::setMinColumnWidth ( long minWidth )

Sets the minimum width for columns in the grid layout.

Parameters

minWidth The minimum width in pixels.

◆ setScrollbarTopOffset()

void ButtonGrid::setScrollbarTopOffset ( __int64 firstVisibleRow )

virtual

Sets the top row index for vertical scrollbar.

Parameters

firstVisibleRow Index of the first visible row.

Reimplemented from Component.

◆ setTitle()

void ButtonGrid::setTitle ( const wstring & title )

Sets the grid's title.

Parameters

title The title to display.

◆ windowCreated()

void ButtonGrid::windowCreated ( )

protectedvirtual

Called when the window is created.

Implements Component.

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

ButtonGrid.h

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ButtonGrid()

◆ ~ButtonGrid()

Member Function Documentation

◆ addActionListener()

◆ addButton()

◆ clear()

◆ enableButton()

◆ getCreateWindowOptions()

◆ getScrollingInfo()

◆ onArrowDown()

◆ onArrowUp()

◆ onKeyEnd()

◆ onKeyHome()

◆ onMousePressed()

◆ onMouseReleased()

◆ onMouseRightClicked()

◆ onMouseWheel()

◆ onPageDown()

◆ onPageUp()

◆ onPaint()

◆ onWindowResized()

◆ setImagePosition()

◆ setMinColumnWidth()

◆ setScrollbarTopOffset()

◆ setTitle()

◆ windowCreated()