Synopsis

Example

Motivation

To Do

Member Description

static int init(Tcl_Interp *)

TkPixelCanvas(Tcl_Interp *interp, char *path)

Constructor; instances of this class should only be constructed by the static member TkPixelCanvas::ClassCmd.

static int ClassCmd(ClientData, Tcl_Interp *, int, char **)

This static member is registered with Tcl to be called when the user creates a widget of this type.

static int WidgetCmd(ClientData, Tcl_Interp *, int, char **)

This static member is registered with Tcl to be called when the user invokes an operation on a widget of this type. It is registered by TkPixelCanvas::ClassCmd.

int configureWidget(Tcl_Interp *, int, char **)

Configure the widget using Tcl-style arguments.

static void HandleWidgetEvent(ClientData, XEvent *)

Handle events in which the Tk side of things is interested:

void invalidateWindow()
void scheduleUpdate()
static void UpdateWidget(ClientData)
void update()

A set of methods to arrange the invalidation of the current window display, and arrange for appropriate update.

void resizeHandler(XEvent *)

Handle resizing:

void exposeHandler()

Handle exposure:

void focus(int)

Update the focus state of the visual widget:

int windowExists()

Does the Tk window exist?

int widgetConfigured()

Has the widget been configured already?

int updatePending()

Is an update waiting to be serviced?

int redrawRequired()

Is a redraw needed?

int redrawWindow()

Should we redraw the window?

int width()
int height()

width and height of widget

Tk_Window tkWindow()

What is the Tk_Window?

enum FlagVals