Syllable higlevel API: os::TextView Class Reference

TextView::TextView	(	const Rect &	cFrame,
		const String &	cTitle,
		const char *	pzText,
		uint32	nResizeMask = `CF_FOLLOW_LEFT \| CF_FOLLOW_TOP`,
		uint32	nFlags = `WID_WILL_DRAW \| WID_FULL_UPDATE_ON_RESIZE`
	)

Description:: The contructor will initialize the text view and set all properties to default values. See the documentaition of each Setxxx() members to see what the verious default values might be.

Parameters:

	cFrame	Passed on to the os::View constructor.
	pzTitle	Passed on to the os::View constructor (only used to identify the view. Newer rendered anywhere).
	pzText	The initial content of the TextView or NULL if the TextView should be empty.
	nResizeMask	Passed on to the os::View constructor.
	nFlags	Passed on to the os::View constructor.

See also:: os::View::View()

Author:: Kurt Skauen ([email protected])

TextView::~TextView ( )

Member Function Documentation

void TextView::MouseMove	(	const Point &	cNewPos,
		int	nCode,
		uint32	nButtons,
		Message *	pcData
	)			`[virtual]`

Description:: This member is called from the window thread whenever the mouse is moved above the view or if the view has focus.

: Oveload this member if your view need to handle mouse-move events.

: The default implementation of this member will call MouseMove() on it's parent view if one exists.

Parameters:

	cNewPos	New mouse position given in the views coordinate system.
	nCode	Enter/exit code. This is MOUSE_ENTERED when the mouse first enter the view, MOUSE_EXITED when the mouse leaves the view, MOUSE_INSIDE whenever the mouse move withing the boundary of the view and MOUSE_OUTSIDE when the mouse move outside the view (will only happen if the view has focus).
	nButtons	Bitmask telling which buttons that are currently pressed. Bit 0 is button 1 (left), bit 1 is button 2 (right), and bit 2 is button 3 (middle), and so on.
	pcData	Pointer to a Message object containing the dragged data if the user is in the middle of a drag and drop operation. Otherwise this pointer is NULL. Look at BeginDrag() for a more detailed description of the drag and drop system.

See also:: MouseDown(), MouseUp(), WheelMoved(), BeginDrag()

Author:: Kurt Skauen ([email protected])

Reimplemented from os::View.

void TextView::MouseDown	(	const Point &	cPosition,
		uint32	nButtons
	)			`[virtual]`

Description:: This member is called from the window thread whenever a mouse button is clicked above the view. You can overload this member if your view need to know about mouse-down events.

: A view will not automatically take focus when clicked so if you want that behaviour you must call MakeFocus() from an overloaded version of this member.

: The default implementation of this member will call MouseDown() on it's parent view if one exists.

Parameters:

	cPosition	Mouse position in the views coordinate system at the time the mouse was pressed.
	nButtons	Index of the pressed button. Buttons start at 1 for the left button, 2 for the right button, 3 for the middle button. Additional buttons might be supported by the mouse driver and will then be assigned numbers from 4 and up.

See also:: MouseUp(), MouseMove(), WheelMoved()

Author:: Kurt Skauen ([email protected])

Reimplemented from os::View.

void TextView::MouseUp	(	const Point &	cPosition,
		uint32	nButtons,
		Message *	pcData
	)			`[virtual]`

Description:: This member is called from the window thread whenever a mouse button is released above the view. You can overload this member if your view need to know about mouse-up events or if your view support drag and drop.

: If mouse-up was the result of ending a drag and drop operation the pcData member will point to a Message containing the dragged data. Look at BeginDrag() for a more detailed description of the drag and drop system.

: The default implementation of this member will call MouseDown() on it's parent view if one exists.

Parameters:

	cPosition	Mouse position in the views coordinate system at the time the mouse was pressed.
	nButtons	Index of the pressed button. Buttons start at 1 for the left button, 2 for the right button, 3 for the middle button. Additional buttons might be supported by the mouse driver and will then be assigned numbers from 4 and up.
	pcData	Pointer to a Message object containing the dragged data if this mouse-up was the end of a drag and drop operation. If no data was dragged it will be NULL.

See also:: MouseDown(), MouseMove(), WheelMoved()

Author:: Kurt Skauen ([email protected])

Reimplemented from os::View.

void TextView::WheelMoved ( const Point & cDelta ) [virtual]

Description:: This member is called from the window thread whenever the user rotates the scroll wheel with the mouse pointer above this view.

: The default implementation of this member will call WheelMoved() on it's parent view if one exists.

Since:: V0.3.7

Parameters:

cDelta

Delta movement. Normally only the y value is used but it is possible for the mouse driver to also support horizontal scroll wheel functionality. The delta value is normally +/- 1.0 for each "click" on the wheel.

See also:: MouseMove(), MouseDown(), MouseUp()

Author:: Kurt Skauen ([email protected])

Reimplemented from os::View.

void TextView::KeyDown	(	const char *	pzString,
		const char *	pzRawString,
		uint32	nQualifiers
	)			`[virtual]`

Description:: Overload this member if your view need to handle keyboard input. This member is called to allow the view to handle M_KEY_DOWN messages. The most common members are exctracted from the message and passed as parameters but you might need to obtain the raw message with os::Looper::GetCurrentMessage() and find some members yourself if you the data you needed are not passed in.

: For example if you need the raw key-code for the pressed key you will have to lookup the "_raw_key" member from the message.

Parameters:

	pzString	String containing a single UTF-8 encoded character. This is the character generated by the pressed key according to the current keymap accounting for any qualifiers that might be pressed.
	pzRawString	Same as `pzString` except that the key is converted without accounting for qualifiers. Ie. if 'A' is pressed while pressing <SHIFT> pzString will contain 'A' and pzRawString will contain 'a'.
	nQualifiers	Bitmask describing which qualifiers that was active when the key was pressed.

See also:: KeyUp(), os::Looper::GetCurrentMessage()

Author:: Kurt Skauen ([email protected])

Reimplemented from os::View.

Reimplemented in os::DropdownMenu::DropdownTextView.

void TextView::LabelChanged ( const String & cNewLabel ) [virtual]

Reimplemented from os::Control.

void TextView::EnableStatusChanged ( bool bIsEnabled ) [virtual]

Implements os::Control.

bool TextView::Invoked ( Message * pcMessage ) [virtual]

Description:: This member is called from Invoke() just before a message is sendt to the target.

: This allow classes that inherits from os::Invoker to add data to or otherwhice modify the message before it is sendt. The message can also be canceled entirely by returning false from this member.

: The message passed to Invoked() is a copy of the internal message or the message passed to Invoke() (if any) so any changes made here will not affect the internal message or the message passed to Invoke(). When this method returns the message will imidiatly be sendt to the target and then discarded (unless false is returned in which case the message is simply discarded).

: The default implementation of this member does nothing and return true.

Parameters:

pcMessage

Pointer to the message that is about to be sendt. You can do any modification you like to this message (but never delete it).

Returns:: Normally you should return true to indicate that the message should be sendt. You can however return false if you for some reason want to cancel the invokation.

See also:: Invoke(), SetMessage(), SetTarget()

Author:: Kurt Skauen ([email protected])

Reimplemented from os::Control.

void TextView::Activated ( bool bIsActive ) [virtual]

Description:: This is a callback member that can be overloaded by derived classes to learn when the view is activated and when it is deactivated. The bIsActive parameter tell whether the focus was lost or gained.

: The view has focus when it is the active view in the active window.

Note:: This is a hook function that is called by the system to notify about an event. You should never call this member yourself.

The window is locked when this member is called.

Parameters:

bIsActive

- true if the view gain and false if it loose focus.

See also:: MakeFocus(), WindowActivated()

Author:: Kurt Skauen ([email protected])

Reimplemented from os::View.

void TextView::SetValue	(	Variant	cValue,
		bool	bInvoke = `true`
	)			`[virtual]`

Reimplemented from os::Control.

Variant TextView::GetValue ( ) const [virtual]

Reimplemented from os::Control.

const View * TextView::GetEditor ( ) const

Description:: The os::TextView class is only responsible for rendering the borders and controlling the scroll-bars. Everything else is handled by a child view crated by the constructor. The os::TextView class provide an interface to all the functionality of the internal editor but in some rare cases it might be useful to have a pointer to this child view.

Note:: In erlier version (before V0.3.3) the only way to change the font used by the text editor was to retrieve the editor and then set it's font manually. This is not neccessarry (and not possible) any longer. Setting the font on the os::TextView class itself will automatically be relected by the internal editor.

Returns:: A const pointer to the internal editor.

Author:: Kurt Skauen ([email protected])

void TextView::SetMultiLine ( bool bMultiLine = true )

Description:: The TextView have two quite different modes. Multiline and single line.

In singleline mode it will only allow a single line of text and it will send the EI_ENTER_PRESSED event (if not masked out) when the user press <ENTER> or <RETURN>. It will also always center the single line vertically inside the views boundary and it will never display scroll bars.

In multiline mode it will allow multiple lines of text and <ENTER> and <RETURN> will insert a new line instead of trigging the EI_ENTER_PRESSED event. The view will automatically add and remove vertical and horizontal scroll-bars as needed.

Parameters:

bMultiLine

True to set the view in multiline mode or false to set it in singleline mode.

See also:: GetMultiLine(), SetEventMask(), SetPasswordMode()

Author:: Kurt Skauen ([email protected])

bool TextView::GetMultiLine ( ) const

Returns:: True if the view is in multiline mode, false if it is in singleline mode.

See also:: SetMultiLine()

Author:: Kurt Skauen ([email protected])

void TextView::SetPasswordMode ( bool bPassword = true )

Description:: When setting the view in password mode it will render all characters as asterics (*) to hide it's content and it will not allow the user to copy the content to the clipboard.

Note:: Only single-line TextView's should be set in password mode.

Parameters:

bPassword

True to enable password mode, false to disable it.

See also:: GetPasswordMode(), SetMultiLine()

Author:: Kurt Skauen ([email protected])

bool TextView::GetPasswordMode ( ) const

Returns:: True if the view is in password mode, false if not.

See also:: SetPasswordMode()

Author:: Kurt Skauen ([email protected])

void TextView::SetNumeric ( bool bNumeric )

Description:: When numeric mode is enabled the TextView will only accept valid numbers to be typed.

Digits are always accepted. Punctuation (.) is accepted once. "E" is accepted once. Plus and minus (+/-) is accepted as the first character of the line or as the first character after an "E".

If you have other restrictions on what should be accepted as input (for example hexadecimal numbers) you can overload the FilterKeyStroke() hook and filter the user input yourself.

Parameters:

bNumeric

True to enable numeric mode, false to disable it.

See also:: GetNumeric(), FilterKeyStroke()

Author:: Kurt Skauen ([email protected])

bool TextView::GetNumeric ( ) const

Returns:: True if numeric mode is enabled, false if it is disabled.

See also:: SetNumeric()

Author:: Kurt Skauen ([email protected])

void TextView::SetReadOnly ( bool bFlag = true )

bool TextView::GetReadOnly ( ) const

int TextView::GetMaxUndoSize ( ) const

void TextView::SetMaxUndoSize ( int nSize )

uint32 TextView::GetEventMask ( ) const

void TextView::SetEventMask ( uint32 nMask )

void TextView::GetRegion ( String * pcBuffer ) const

void TextView::SetMinPreferredSize	(	int	nWidthChars,
		int	nHeightChars
	)

IPoint TextView::GetMinPreferredSize ( ) const

void TextView::SetMaxPreferredSize	(	int	nWidthChars,
		int	nHeightChars
	)

IPoint TextView::GetMaxPreferredSize ( ) const

void TextView::MakeCsrVisible ( )

void TextView::Clear ( bool bSendNotify = true )

void TextView::Set	(	const char *	pzBuffer,
		bool	bSendNotify = `true`
	)

void TextView::Insert	(	const char *	pzBuffer,
		bool	bSendNotify = `true`
	)

void TextView::Insert	(	const IPoint &	cPos,
		const char *	pzBuffer,
		bool	bSendNotify = `true`
	)

void TextView::Select	(	const IPoint &	cStart,
		const IPoint &	cEnd,
		bool	bSendNotify = `true`
	)

void TextView::SelectAll ( bool bSendNotify = true )

void TextView::ClearSelection ( bool bSendNotify = true )

bool TextView::GetSelection	(	IPoint *	pcStart = `NULL`,
		IPoint *	pcEnd = `NULL`
	)			const

void TextView::SetCursor	(	int	x,
		int	y,
		bool	bSelect = `false`,
		bool	bSendNotify = `true`
	)

void TextView::SetCursor	(	const IPoint &	cPos,
		bool	bSelect = `false`,
		bool	bSendNotify = `true`
	)

void TextView::GetCursor	(	int *	x,
		int *	y
	)			const

IPoint TextView::GetCursor ( ) const

void TextView::SetMaxLength ( size_t nMaxLength )

size_t TextView::GetMaxLength ( ) const

size_t TextView::GetCurrentLength ( ) const

void TextView::Cut ( bool bSendNotify = true )

void TextView::Copy ( )

void TextView::Paste ( bool bSendNotify = true )

void TextView::Delete ( bool bSendNotify = true )

void TextView::Delete	(	const IPoint &	cStart,
		const IPoint &	cEnd,
		bool	bSendNotify = `true`
	)

void TextView::Undo ( )

void TextView::Redo ( )

const TextView::buffer_type & TextView::GetBuffer ( ) const

void TextView::SetTabOrder ( int nOrder ) [virtual]

Description:: Set the value that will be returned by GetTabOrder().

Parameters:

nOrder

- The sorting order.

See also:: GetTabOrder()

Author:: Kurt Skauen ([email protected])

Reimplemented from os::View.

Point TextView::GetPreferredSize ( bool bLargest ) const [virtual]

Reimplemented from os::View.

bool TextView::FilterKeyStroke ( const String * pcString ) [virtual]

void TextView::FontChanged ( Font * pcNewFont ) [virtual]

Description:: FontChanged() is a virtual hook function that can be overloaded by inheriting classes to track changes to the view's font.

: This hook function is called whenver the font is replaced through the View::SetFont() member or if the currently assigned font is modified in a way that whould alter the graphical appearance of the font.

Note:: View::SetFont() will call FontChanged() syncronously and will cause FontChanged() to be called even if the view is not yet added to a window. Changes done to the font-object cause a message to be sendt to the window thread and FontChanged() will then be called asyncronously from the window thread when the message arrive. For this reason it is only possible to track changes done to the font object itself when the view is added to a window.

Parameters:

pcNewFont

Pointer to the affected font (same as returned by GetFont()).

See also:: SetFont(), os::Font

Author:: Kurt Skauen ([email protected])

Reimplemented from os::View.

void TextView::FrameSized ( const Point & cDelta ) [virtual]

Description:: Overload this member if you need to know when the view is resized.

Note:: This member is called after the view is resized. If you need the old size you can subtract the cDelta calue from the current size.

Parameters:

cDelta

The distance the bottom/right corner was moved relative to the upper/left corner.

See also:: FrameMoved(), SetFrame, ResizeBy(), ResizeTo()

Author:: Kurt Skauen ([email protected])

Reimplemented from os::View.

void TextView::Paint ( const Rect & cUpdateRect ) [virtual]

Description:

Note:

Warning:

Parameters:

cUpdateRect

A rectangle enclosing all damaged areas. This is just a rough "worst-case", further fine-grained clipping will be performed by the Application Server to avoid updating non-damaged pixels and make the update as fast and flicker-free as possible.

See also:: Invalidate(), Flush()

Author:: Kurt Skauen ([email protected])

Reimplemented from os::View.


Public Types
enum	{ EI_CONTENT_CHANGED = 0x0001, EI_ENTER_PRESSED = 0x0002, EI_ESC_PRESSED = 0x0004, EI_FOCUS_LOST = 0x0008, EI_CURSOR_MOVED = 0x0010, EI_SELECTION_CHANGED = 0x0020, EI_MAX_SIZE_REACHED = 0x0040, EI_MAX_SIZE_LEFT = 0x0080, EI_WAS_EDITED = 0x0100 }
typedef std::vector< String >	buffer_type
Public Member Functions
	TextView (const Rect &cFrame, const String &cTitle, const char *pzBuffer, uint32 nResizeMask=CF_FOLLOW_LEFT\|CF_FOLLOW_TOP, uint32 nFlags=WID_WILL_DRAW\|WID_FULL_UPDATE_ON_RESIZE)
	os::TextView constructor
	~TextView ()
virtual void	MouseMove (const Point &cNewPos, int nCode, uint32 nButtons, Message *pcData)
	Hook called by the system when the mouse is moved.
virtual void	MouseDown (const Point &cPosition, uint32 nButtons)
	Hook called by the system when a mouse button is pressed.
virtual void	MouseUp (const Point &cPosition, uint32 nButtons, Message *pcData)
	Hook called by the system when a mouse button is release.
virtual void	WheelMoved (const Point &cDelta)
	Hook called by the system when the scroll-wheel is rotated.
virtual void	KeyDown (const char pzString, const char pzRawString, uint32 nQualifiers)
	Hook called by the system when a key is pressed while the view has focus.
virtual void	LabelChanged (const String &cNewLabel)
virtual void	EnableStatusChanged (bool bIsEnabled)
virtual bool	Invoked (Message *pcMessage)
	Intercept outgoing messages.
virtual void	Activated (bool bIsActive)
	Hook called when the view gain or loose focus.
virtual void	SetValue (Variant cValue, bool bInvoke=true)
virtual Variant	GetValue () const
const View *	GetEditor () const
	Get a pointer to the editor view.
void	SetMultiLine (bool bMultiLine=true)
	Enable/disable multiline mode.
bool	GetMultiLine () const
	Get the current editor mode.
void	SetPasswordMode (bool bPassword=true)
	Disable/enable password mode.
bool	GetPasswordMode () const
	Get the current echo mode.
void	SetNumeric (bool bNumeric)
	Set the view in "numeric" mode.
bool	GetNumeric () const
	Check if the view is in numeric mode.
void	SetReadOnly (bool bFlag=true)
bool	GetReadOnly () const
int	GetMaxUndoSize () const
void	SetMaxUndoSize (int nSize)
uint32	GetEventMask () const
void	SetEventMask (uint32 nMask)
void	GetRegion (String *pcBuffer) const
void	SetMinPreferredSize (int nWidthChars, int nHeightChars)
IPoint	GetMinPreferredSize () const
void	SetMaxPreferredSize (int nWidthChars, int nHeightChars)
IPoint	GetMaxPreferredSize () const
void	MakeCsrVisible ()
void	Clear (bool bSendNotify=true)
void	Set (const char *pzBuffer, bool bSendNotify=true)
void	Insert (const char *pzBuffer, bool bSendNotify=true)
void	Insert (const IPoint &cPos, const char *pzBuffer, bool bSendNotify=true)
void	Select (const IPoint &cStart, const IPoint &cEnd, bool bSendNotify=true)
void	SelectAll (bool bSendNotify=true)
void	ClearSelection (bool bSendNotify=true)
bool	GetSelection (IPoint pcStart=NULL, IPoint pcEnd=NULL) const
void	SetCursor (int x, int y, bool bSelect=false, bool bSendNotify=true)
void	SetCursor (const IPoint &cPos, bool bSelect=false, bool bSendNotify=true)
void	GetCursor (int x, int y) const
IPoint	GetCursor () const
void	SetMaxLength (size_t nMaxLength)
size_t	GetMaxLength () const
size_t	GetCurrentLength () const
void	Cut (bool bSendNotify=true)
void	Copy ()
void	Paste (bool bSendNotify=true)
void	Delete (bool bSendNotify=true)
void	Delete (const IPoint &cStart, const IPoint &cEnd, bool bSendNotify=true)
void	Undo ()
void	Redo ()
const buffer_type &	GetBuffer () const
virtual void	SetTabOrder (int nOrder)
	Set the keyboard manouvering sorting order.
virtual Point	GetPreferredSize (bool bLargest) const
virtual bool	FilterKeyStroke (const String *pcString)
virtual void	FontChanged (Font *pcNewFont)
	Called to notify the view that the font has changed.
virtual void	FrameSized (const Point &cDelta)
	Virtual hook called by the system when the view is resized.
virtual void	Paint (const Rect &cUpdateRect)
	Called by the system update "damaged" areas of the view.
Friends
class	TextEdit

EI_CONTENT_CHANGED
EI_ENTER_PRESSED
EI_ESC_PRESSED
EI_FOCUS_LOST
EI_CURSOR_MOVED
EI_SELECTION_CHANGED
EI_MAX_SIZE_REACHED
EI_MAX_SIZE_LEFT
EI_WAS_EDITED

os::TextView Class Reference
[The Syllable Graphical User Interface API]

Public Types

Public Member Functions

Friends

Detailed Description

Member Typedef Documentation

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

os::TextView Class Reference [The Syllable Graphical User Interface API]

Public Types

Public Member Functions

Friends

Detailed Description

Member Typedef Documentation

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

os::TextView Class Reference
[The Syllable Graphical User Interface API]