GWIN reduce Initialisation parameters and fix visibility issues

18 files changed, 147 insertions, 132 deletions

diff --git a/demos/modules/gwin/widgets/gfxconf.h b/demos/modules/gwin/widgets/gfxconf.h
index 5c862441..fb83f860 100644
--- a/demos/modules/gwin/widgets/gfxconf.h
+++ b/demos/modules/gwin/widgets/gfxconf.h
@@ -73,7 +73,7 @@
 /* Features for the GWIN sub-system. */
 #define GWIN_NEED_WINDOWMANAGER	TRUE
 #define GWIN_NEED_CONSOLE		TRUE
-#define GWIN_NEED_GRAPH			FALSE
+#define GWIN_NEED_GRAPH			TRUE
 #define GWIN_NEED_WIDGET		TRUE
 #define GWIN_NEED_BUTTON		TRUE
 #define GWIN_NEED_SLIDER		TRUE
diff --git a/demos/modules/gwin/widgets/main.c b/demos/modules/gwin/widgets/main.c
index 33c288f4..70f64572 100644
--- a/demos/modules/gwin/widgets/main.c
+++ b/demos/modules/gwin/widgets/main.c
@@ -64,35 +64,47 @@ int main(void) {
 		gwinAttachMouse(0);
 	#endif
 
-	// Create out gwin windows/widgets
-	ghConsole = gwinCreateConsole(NULL, ScrWidth/2+1, ScrHeight/2+1, ScrWidth/2-1, ScrHeight/2-1);
-	ghButton1 = gwinCreateButton(NULL, 0+0*(BUTTON_WIDTH+1), 0, BUTTON_WIDTH, BUTTON_HEIGHT);
-	ghButton2 = gwinCreateButton(NULL, 0+1*(BUTTON_WIDTH+1), 0, BUTTON_WIDTH, BUTTON_HEIGHT);
-	ghButton3 = gwinCreateButton(NULL, 0+2*(BUTTON_WIDTH+1), 0, BUTTON_WIDTH, BUTTON_HEIGHT);
-	ghButton4 = gwinCreateButton(NULL, 0+3*(BUTTON_WIDTH+1), 0, BUTTON_WIDTH, BUTTON_HEIGHT);
-	ghSlider1 = gwinCreateSlider(NULL, ScrWidth/2+1, ScrHeight/2-2*(SLIDER_WIDTH+1), ScrWidth/2-2, SLIDER_WIDTH);
-	ghSlider2 = gwinCreateSlider(NULL, ScrWidth/2+1, ScrHeight/2-1*(SLIDER_WIDTH+1), ScrWidth/2-2, SLIDER_WIDTH);
-	ghSlider3 = gwinCreateSlider(NULL, 0+0*(SLIDER_WIDTH+1), ScrHeight/2+1, SLIDER_WIDTH, ScrHeight/2-2);
-	ghSlider4 = gwinCreateSlider(NULL, 0+1*(SLIDER_WIDTH+1), ScrHeight/2+1, SLIDER_WIDTH, ScrHeight/2-2);
-	ghCheckbox1 = gwinCreateCheckbox(NULL, 0, BUTTON_HEIGHT+1, CHECKBOX_WIDTH, CHECKBOX_HEIGHT);
-	ghCheckbox2 = gwinCreateCheckbox(NULL, 0, BUTTON_HEIGHT+1+1*(CHECKBOX_HEIGHT+1), CHECKBOX_WIDTH, CHECKBOX_HEIGHT);
-
-	// Color everything and set special drawing for some widgets
-    gwinSetColor(ghConsole, Yellow);
-    gwinSetBgColor(ghConsole, Black);
-    gwinSetCustomDraw(ghCheckbox2, gwinCheckboxDraw_CheckOnRight, 0);
-
-    // Set the text on all the controls
-    gwinSetText(ghButton1, "B1", FALSE);
-	gwinSetText(ghButton2, "B2", FALSE);
-	gwinSetText(ghButton3, "B3", FALSE);
-	gwinSetText(ghButton4, "B4", FALSE);
-	gwinSetText(ghSlider1, "S1", FALSE);
-	gwinSetText(ghSlider2, "S2", FALSE);
-	gwinSetText(ghSlider3, "S3", FALSE);
-	gwinSetText(ghSlider4, "S4", FALSE);
-	gwinSetText(ghCheckbox1, "C1", FALSE);
-	gwinSetText(ghCheckbox2, "C2", FALSE);
+	// Create the gwin windows/widgets
+	{
+		GWidgetInit		wi;
+
+		wi.g.show = TRUE;
+
+		// Buttons
+		wi.g.width = BUTTON_WIDTH; wi.g.height = BUTTON_HEIGHT; wi.g.y = 0;
+		wi.g.x = 0+0*(BUTTON_WIDTH+1); wi.text = "B1"; ghButton1 = gwinCreateButton(NULL, &wi);
+		wi.g.x = 0+1*(BUTTON_WIDTH+1); wi.text = "B2"; ghButton2 = gwinCreateButton(NULL, &wi);
+		wi.g.x = 0+2*(BUTTON_WIDTH+1); wi.text = "B3"; ghButton3 = gwinCreateButton(NULL, &wi);
+		wi.g.x = 0+3*(BUTTON_WIDTH+1); wi.text = "B4"; ghButton4 = gwinCreateButton(NULL, &wi);
+
+		// Horizontal Sliders
+		wi.g.width = ScrWidth/2-2; wi.g.height = SLIDER_WIDTH; wi.g.x = ScrWidth/2+1;
+		wi.g.y = ScrHeight/2-2*(SLIDER_WIDTH+1); wi.text = "S1"; ghSlider1 = gwinCreateSlider(NULL, &wi);
+		wi.g.y = ScrHeight/2-1*(SLIDER_WIDTH+1); wi.text = "S2"; ghSlider2 = gwinCreateSlider(NULL, &wi);
+
+		// Vertical Sliders
+		wi.g.width = SLIDER_WIDTH; wi.g.height = ScrHeight/2-2; wi.g.y = ScrHeight/2+1;
+		wi.g.x = 0+0*(SLIDER_WIDTH+1); wi.text = "S3"; ghSlider3 = gwinCreateSlider(NULL, &wi);
+		wi.g.x = 0+1*(SLIDER_WIDTH+1); wi.text = "S4"; ghSlider4 = gwinCreateSlider(NULL, &wi);
+
+		// Checkboxes - for the 2nd checkbox we apply special drawing before making it visible
+		wi.g.width = CHECKBOX_WIDTH; wi.g.height = CHECKBOX_HEIGHT; wi.g.x = 0;
+		wi.g.y = BUTTON_HEIGHT+1+0*(CHECKBOX_HEIGHT+1); wi.text = "C1"; ghCheckbox1 = gwinCreateCheckbox(NULL, &wi);
+		wi.g.show = FALSE;
+		wi.g.y = BUTTON_HEIGHT+1+1*(CHECKBOX_HEIGHT+1); wi.text = "C2"; ghCheckbox2 = gwinCreateCheckbox(NULL, &wi);
+	    gwinSetCustomDraw(ghCheckbox2, gwinCheckboxDraw_CheckOnRight, 0);
+		gwinSetVisible(ghCheckbox2, TRUE);
+
+		// Console - we apply some special colors before making it visible
+		wi.g.show = FALSE;
+		wi.g.width = ScrWidth/2-1; wi.g.height = ScrHeight/2-1;
+		wi.g.x = ScrWidth/2+1; wi.g.y = ScrHeight/2+1;
+		ghConsole = gwinCreateConsole(NULL, &wi.g);
+	    gwinSetColor(ghConsole, Yellow);
+	    gwinSetBgColor(ghConsole, Black);
+		gwinSetVisible(ghConsole, TRUE);
+		gwinClear(ghConsole);
+	}
 
     // Assign toggles and dials to the buttons & sliders etc.
 	#if GINPUT_NEED_TOGGLE
@@ -104,19 +116,6 @@ int main(void) {
 		gwinAttachDial(ghSlider3, 0, 1);
 	#endif
 
-	// Draw everything on the screen
-	gwinClear(ghConsole);
-	gwinSetVisible(ghButton1, TRUE);
-	gwinSetVisible(ghButton2, TRUE);
-	gwinSetVisible(ghButton3, TRUE);
-	gwinSetVisible(ghButton4, TRUE);
-	gwinSetVisible(ghSlider1, TRUE);
-	gwinSetVisible(ghSlider2, TRUE);
-	gwinSetVisible(ghSlider3, TRUE);
-	gwinSetVisible(ghSlider4, TRUE);
-	gwinSetVisible(ghCheckbox1, TRUE);
-	gwinSetVisible(ghCheckbox2, TRUE);
-
 	while(1) {
 		// Get an Event
 		pe = geventEventWait(&gl, TIME_INFINITE);
diff --git a/include/gwin/button.h b/include/gwin/button.h
index 21de74bd..a6b19333 100644
--- a/include/gwin/button.h
+++ b/include/gwin/button.h
@@ -70,26 +70,21 @@ extern "C" {
  * @return  NULL if there is no resultant drawing area, otherwise a window handle.
  *
  * @param[in] gb		The GButtonObject structure to initialise. If this is NULL the structure is dynamically allocated.
- * @param[in] x,y		The screen co-ordinates for the top left corner of the window
- * @param[in] width		The width of the window
- * @param[in] height	The height of the window
+ * @param[in] pInit		The initialisation parameters
  *
  * @note				The drawing color and the background color get set to the current defaults. If you haven't called
  * 						@p gwinSetDefaultColor() or @p gwinSetDefaultBgColor() then these are White and Black respectively.
  * @note				The font gets set to the current default font. If you haven't called @p gwinSetDefaultFont() then there
  * 						is no default font and text drawing operations will no nothing.
- * @note				The dimensions and position may be changed to fit on the real screen.
  * @note				A button remembers its normal drawing state. If there is a window manager then it is automatically
  * 						redrawn if the window is moved or its visibility state is changed.
- * @note				The button is initially marked as invisible so that more properties can be set before display.
- * 						Call @p gwinSetVisible() to display it when ready.
  * @note				A button supports mouse and a toggle input.
  * @note				When assigning a toggle, only one toggle is supported. If you try to assign more than one toggle it will
  * 						forget the previous toggle. When assigning a toggle the role parameter must be 0.
  *
  * @api
  */	
-GHandle gwinCreateButton(GButtonObject *gb, coord_t x, coord_t y, coord_t width, coord_t height);
+GHandle gwinCreateButton(GButtonObject *gb, GWidgetInit *pInit);
 
 /**
  * @brief   Set the colors of a button.
diff --git a/include/gwin/checkbox.h b/include/gwin/checkbox.h
index 4a5e032a..9a19a2e1 100644
--- a/include/gwin/checkbox.h
+++ b/include/gwin/checkbox.h
@@ -59,26 +59,21 @@ typedef struct GCheckboxObject_t {
  * @return				NULL if there is no resultant drawing area, otherwise a window handle.
  *
  * @param[in] gb		The GCheckboxObject structure to initialise. If this is NULL, the structure is dynamically allocated.
- * @param[in] x,y		The screen co-ordinates for the top left corner of the window
- * @param[in] width		The width of the window
- * @param[in] height	The height of the window
+ * @param[in] pInit		The initialization parameters to use
  *
  * @note				The drawing color and the background color get set to the current defaults. If you haven't called
  * 						@p gwinSetDefaultColor() or @p gwinSetDefaultBgColor() then these are White and Black respectively.
  * @note				The font gets set to the current default font. If you haven't called @p gwinSetDefaultFont() then there
  * 						is no default font and text drawing operations will no nothing.
- * @note				The dimensions and position may be changed to fit on the real screen.
  * @note				A checkbox remembers its normal drawing state. If there is a window manager then it is automatically
  * 						redrawn if the window is moved or its visibility state is changed.
- * @note				The checkbox is initially marked as invisible so that more properties can be set before display.
- * 						Call @p gwinSetVisible() to display it when ready.
  * @note				A checkbox supports mouse and a toggle input.
  * @note				When assigning a toggle, only one toggle is supported. If you try to assign more than one toggle it will
  * 						forget the previous toggle. When assigning a toggle the role parameter must be 0.
  *
  * @api
  */
-GHandle gwinCreateCheckbox(GCheckboxObject *gb, coord_t x, coord_t y, coord_t width, coord_t height);
+GHandle gwinCreateCheckbox(GCheckboxObject *gb, GWidgetInit *pInit);
 
 /**
  * @brief	Get the state of a checkbox
diff --git a/include/gwin/class_gwin.h b/include/gwin/class_gwin.h
index eda69e1e..c3d2ee36 100644
--- a/include/gwin/class_gwin.h
+++ b/include/gwin/class_gwin.h
@@ -45,6 +45,7 @@
  */
 typedef struct gwinVMT {
 	const char *		classname;						// @< The GWIN classname (mandatory)
+	size_t				size;							// @< The size of the class object
 	void (*Destroy)		(GWindowObject *gh);			// @< The GWIN destroy function (optional)
 	void (*Redraw)		(GWindowObject *gh);			// @< The GWIN redraw routine (optional)
 	void (*AfterClear)	(GWindowObject *gh);			// @< The GWIN after-clear function (optional)
@@ -116,7 +117,7 @@ typedef struct gwinVMT {
 	typedef struct gwmVMT {
 		void (*Init)		(void);									// @< The window manager has just been set as the current window manager
 		void (*DeInit)		(void);									// @< The window manager has just been removed as the current window manager
-		bool_t (*Add)		(GHandle gh, coord_t x, coord_t y, coord_t w, coord_t h);	// @< A window has been added
+		bool_t (*Add)		(GHandle gh, GWindowInit *pInit);		// @< A window has been added
 		void (*Delete)		(GHandle gh);							// @< A window has been deleted
 		void (*Visible)		(GHandle gh);							// @< A window has changed its visibility state
 		void (*Redim)		(GHandle gh, coord_t x, coord_t y, coord_t w, coord_t h);	// @< A window wants to be moved or resized
@@ -139,15 +140,13 @@ extern "C" {
  * @brief	Initialise (and allocate if necessary) the base GWIN object
  *
  * @param[in]	pgw		The GWindowObject structure. If NULL one is allocated from the heap
- * @param[in]	x, y	The top left corner of the GWIN relative to the screen
- * @param[in]	w, h	The width and height of the GWIN window
- * @param[in]	size	The size of the GWIN object to allocate
+ * @param[in]	pInit	The user initialization parameters
  * @param[in]	vmt		The virtual method table for the GWIN object
  * @param[in]	flags	The default flags to use
  *
  * @notapi
  */
-GHandle _gwindowCreate(GWindowObject *pgw, coord_t x, coord_t y, coord_t w, coord_t h, size_t size, const gwinVMT *vmt, uint16_t flags);
+GHandle _gwindowCreate(GWindowObject *pgw, GWindowInit *pInit, const gwinVMT *vmt, uint16_t flags);
 
 #if GWIN_NEED_WIDGET || defined(__DOXYGEN__)
 	/**
@@ -161,7 +160,7 @@ GHandle _gwindowCreate(GWindowObject *pgw, coord_t x, coord_t y, coord_t w, coor
 	 *
 	 * @notapi
 	 */
-	GHandle _gwidgetCreate(GWidgetObject *pgw, coord_t x, coord_t y, coord_t w, coord_t h, size_t size, const gwidgetVMT *vmt);
+	GHandle _gwidgetCreate(GWidgetObject *pgw, GWidgetInit *pInit, const gwidgetVMT *vmt);
 
 	/**
 	 * @brief	Destroy the Widget object
diff --git a/include/gwin/console.h b/include/gwin/console.h
index 5682113e..38c88f63 100644
--- a/include/gwin/console.h
+++ b/include/gwin/console.h
@@ -51,23 +51,20 @@ extern "C" {
  * @return  NULL if there is no resultant drawing area, otherwise a window handle.
  *
  * @param[in] gc		The GConsoleObject structure to initialise. If this is NULL the structure is dynamically allocated.
- * @param[in] x,y		The screen co-ordinates for the top left corner of the window
- * @param[in] width		The width of the window
- * @param[in] height	The height of the window
+ * @param[in] pInit		The initialization parameters to use
  *
  * @note				The drawing color and the background color get set to the current defaults. If you haven't called
  * 						@p gwinSetDefaultColor() or @p gwinSetDefaultBgColor() then these are White and Black respectively.
  * @note				The font gets set to the current default font. If you haven't called @p gwinSetDefaultFont() then there
  * 						is no default font and text drawing operations will no nothing.
- * @note				The dimensions and position may be changed to fit on the real screen.
- * @note				On creation the window is marked as visible but is not automatically cleared. You may do that by calling @p gwinClear()
- * 						(possibly after changing your background color)
+ * @note				On creation even if the window is visible it is not automatically cleared.
+ * 						You may do that by calling @p gwinClear() (possibly after changing your background color)
  * @note				A console does not save the drawing state. It is not automatically redrawn if the window is moved or
  * 						its visibility state is changed.
  *
  * @api
  */
-GHandle gwinCreateConsole(GConsoleObject *gc, coord_t x, coord_t y, coord_t width, coord_t height);
+GHandle gwinCreateConsole(GConsoleObject *gc, GWindowInit *pInit);
 
 #if GFX_USE_OS_CHIBIOS && GWIN_CONSOLE_USE_BASESTREAM
 	/**
diff --git a/include/gwin/graph.h b/include/gwin/graph.h
index 2595d2e7..5e6abee1 100644
--- a/include/gwin/graph.h
+++ b/include/gwin/graph.h
@@ -91,17 +91,13 @@ extern "C" {
  * @return  NULL if there is no resultant drawing area, otherwise a window handle.
  *
  * @param[in] gg		The GGraphObject structure to initialise. If this is NULL the structure is dynamically allocated.
- * @param[in] x,y		The screen co-ordinates for the top left corner of the window
- * @param[in] width		The width of the window
- * @param[in] height	The height of the window
+ * @param[in] pInit		The initialization parameters to use
  *
  * @note				The drawing color and the background color get set to the current defaults. If you haven't called
  * 						@p gwinSetDefaultColor() or @p gwinSetDefaultBgColor() then these are White and Black respectively.
  * @note				The font gets set to the current default font. If you haven't called @p gwinSetDefaultFont() then there
  * 						is no default font and text drawing operations will no nothing.
  * @note				The dimensions and position may be changed to fit on the real screen.
- * @note				On creation the window is marked as visible but is not automatically cleared. You may do that by calling @p gwinClear()
- * 						(possibly after changing your background color)
  * @note				A graph does not save the drawing state. It is not automatically redrawn if the window is moved or
  * 						its visibility state is changed.
  * @note				The coordinate system within the window for graphing operations (but not for any other drawing
@@ -111,7 +107,7 @@ extern "C" {
  *
  * @api
  */
-GHandle gwinCreateGraph(GGraphObject *gg, coord_t x, coord_t y, coord_t width, coord_t height);
+GHandle gwinCreateGraph(GGraphObject *gg, GWindowInit *pInit);
 
 /**
  * @brief   Set the style of the graphing operations.
diff --git a/include/gwin/gwidget.h b/include/gwin/gwidget.h
index 0c47dfde..50f19193 100644
--- a/include/gwin/gwidget.h
+++ b/include/gwin/gwidget.h
@@ -53,6 +53,22 @@ typedef struct GWidgetObject {
 /* @} */
 
 /**
+ * @brief	The structure to initialise a widget.
+ *
+ * @note	Some widgets may have extra parameters.
+ * @note	The text element must be static string (not stack allocated). If you want to use
+ * 			a dynamic string (eg a stack allocated string) use NULL for this member and then call
+ * 			@p gwinSetText() with useAlloc set to TRUE.
+ *
+ * @{
+ */
+typedef struct GWidgetInit {
+	GWindowInit		g;								// @< The GWIN initializer
+	const char *	text;							// @< The initial text
+} GWidgetInit;
+/* @} */
+
+/**
  * A comment/rant on the above structure:
  * We would really like the GWindowObject member to be anonymous. While this is
  * allowed under the C11, C99, GNU and various other standards which have been
diff --git a/include/gwin/gwin.h b/include/gwin/gwin.h
index efce49fc..2a03c125 100644
--- a/include/gwin/gwin.h
+++ b/include/gwin/gwin.h
@@ -50,6 +50,21 @@ typedef struct GWindowObject {
 /* @} */
 
 /**
+ * @brief	The structure to initialise a GWIN.
+ *
+ * @note	Some gwin's will need extra parameters.
+ * @note	The dimensions and position may be changed to fit on the real screen.
+ *
+ * @{
+ */
+typedef struct GWindowInit {
+	coord_t			x, y;							// @< The initial screen position
+	coord_t			width, height;					// @< The initial dimension
+	bool_t			show;							// @< Should the window be visible initially
+} GWindowInit;
+/* @} */
+
+/**
  * @brief	A window's minimized, maximized or normal size
  */
 typedef enum { GWIN_NORMAL, GWIN_MAXIMIZE, GWIN_MINIMIZE } GWindowMinMax;
@@ -128,22 +143,18 @@ extern "C" {
 	 * @return  NULL if there is no resultant drawing area, otherwise a window handle.
 	 *
 	 * @param[in] pgw		The window structure to initialize. If this is NULL the structure is dynamically allocated.
-	 * @param[in] x,y		The screen coordinates for the top left corner of the window
-	 * @param[in] width		The width of the window
-	 * @param[in] height	The height of the window
+	 * @param[in] pInit		How to initialise the window
 	 *
 	 * @note				The drawing color and the background color get set to the current defaults. If you haven't called
 	 * 						@p gwinSetDefaultColor() or @p gwinSetDefaultBgColor() then these are White and Black respectively.
 	 * @note				The font gets set to the current default font. If you haven't called @p gwinSetDefaultFont() then there
 	 * 						is no default font and text drawing operations will no nothing.
-	 * @note				The dimensions and position may be changed to fit on the real screen.
-	 * @note				On creation the window is marked as visible.
 	 * @note				A basic window does not save the drawing state. It is not automatically redrawn if the window is moved or
 	 * 						its visibility state is changed.
 	 *
 	 * @api
 	 */
-	GHandle gwinCreateWindow(GWindowObject *pgw, coord_t x, coord_t y, coord_t width, coord_t height);
+	GHandle gwinCreateWindow(GWindowObject *pgw, GWindowInit *pInit);
 
 	/**
 	 * @brief   Destroy a window (of any type). Releases any dynamically allocated memory.
diff --git a/include/gwin/slider.h b/include/gwin/slider.h
index 9baecbb1..4479950f 100644
--- a/include/gwin/slider.h
+++ b/include/gwin/slider.h
@@ -64,19 +64,14 @@ extern "C" {
  * @return  NULL if there is no resultant drawing area, otherwise a window handle.
  *
  * @param[in] gb		The GSliderObject structure to initialise. If this is NULL the structure is dynamically allocated.
- * @param[in] x,y		The screen co-ordinates for the top left corner of the window
- * @param[in] width		The width of the window
- * @param[in] height	The height of the window
+ * @param[in] pInit		The initialization parameters to use
  *
  * @note				The drawing color and the background color get set to the current defaults. If you haven't called
  * 						@p gwinSetDefaultColor() or @p gwinSetDefaultBgColor() then these are White and Black respectively.
  * @note				The font gets set to the current default font. If you haven't called @p gwinSetDefaultFont() then there
  * 						is no default font and text drawing operations will no nothing.
- * @note				The dimensions and position may be changed to fit on the real screen.
  * @note				A slider remembers its normal drawing state. If there is a window manager then it is automatically
  * 						redrawn if the window is moved or its visibility state is changed.
- * @note				The slider is initially marked as invisible so that more properties can be set before display.
- * 						Call @p gwinSetVisible() to display it when ready.
  * @note				The initial slider range is from 0 to 100 with an initial position of 0.
  * @note				A slider supports mouse, toggle and dial input.
  * @note				When assigning a toggle, only one toggle is supported per role. If you try to assign more than
@@ -87,7 +82,7 @@ extern "C" {
  *
  * @api
  */	
-GHandle gwinCreateSlider(GSliderObject *gb, coord_t x, coord_t y, coord_t width, coord_t height);
+GHandle gwinCreateSlider(GSliderObject *gb, GWidgetInit *pInit);
 
 /**
  * @brief   Set the slider range.
diff --git a/src/gwin/button.c b/src/gwin/button.c
index fc432cb4..4f823aa6 100644
--- a/src/gwin/button.c
+++ b/src/gwin/button.c
@@ -41,6 +41,7 @@ static uint16_t ToggleGet(GWidgetObject *gw, uint16_t role);
 static const gwidgetVMT buttonVMT = {
 	{
 		"Button",				// The classname
+		sizeof(GButtonObject),	// The object size
 		_gwidgetDestroy,		// The destroy routine
 		_gwidgetRedraw,			// The redraw routine
 		0,						// The after-clear routine
@@ -150,14 +151,15 @@ static uint16_t ToggleGet(GWidgetObject *gw, uint16_t role) {
 	return ((GButtonObject *)gw)->toggle;
 }
 
-GHandle gwinCreateButton(GButtonObject *gw, coord_t x, coord_t y, coord_t width, coord_t height) {
-	if (!(gw = (GButtonObject *)_gwidgetCreate((GWidgetObject *)gw, x, y, width, height, sizeof(GButtonObject), &buttonVMT)))
+GHandle gwinCreateButton(GButtonObject *gw, GWidgetInit *pInit) {
+	if (!(gw = (GButtonObject *)_gwidgetCreate(&gw->w, pInit, &buttonVMT)))
 		return 0;
 
 	gw->toggle = GWIDGET_NO_INSTANCE;
 	gw->c_up = GButtonDefaultColorsUp;
 	gw->c_dn = GButtonDefaultColorsDown;
 	gw->c_dis = GButtonDefaultColorsDisabled;
+	gwinSetVisible((GHandle)gw, pInit->g.show);
 	return (GHandle)gw;
 }
 
diff --git a/src/gwin/checkbox.c b/src/gwin/checkbox.c
index 0282df42..b4628ae0 100644
--- a/src/gwin/checkbox.c
+++ b/src/gwin/checkbox.c
@@ -34,6 +34,7 @@ static uint16_t ToggleGet(GWidgetObject *gw, uint16_t role);
 static const gwidgetVMT checkboxVMT = {
 	{
 		"Checkbox",				// The classname
+		sizeof(GCheckboxObject),// The object size
 		_gwidgetDestroy,		// The destroy routine
 		_gwidgetRedraw,			// The redraw routine
 		0,						// The after-clear routine
@@ -112,12 +113,13 @@ static uint16_t ToggleGet(GWidgetObject *gw, uint16_t role) {
 	return ((GCheckboxObject *)gw)->toggle;
 }
 
-GHandle gwinCreateCheckbox(GCheckboxObject *gb, coord_t x, coord_t y, coord_t width, coord_t height) {
-	if (!(gb = (GCheckboxObject *)_gwidgetCreate((GWidgetObject *)gb, x, y, width, height, sizeof(GCheckboxObject), &checkboxVMT)))
+GHandle gwinCreateCheckbox(GCheckboxObject *gb, GWidgetInit *pInit) {
+	if (!(gb = (GCheckboxObject *)_gwidgetCreate(&gb->w, pInit, &checkboxVMT)))
 		return 0;
 
 	gb->toggle = (uint16_t) -1;
 	gb->c = defaultColors;			// assign the default colors
+	gwinSetVisible((GHandle)gb, pInit->g.show);
 	return (GHandle)gb;
 }
 
diff --git a/src/gwin/console.c b/src/gwin/console.c
index 38e2ea8b..39e534b4 100644
--- a/src/gwin/console.c
+++ b/src/gwin/console.c
@@ -60,19 +60,21 @@ static void AfterClear(GWindowObject *gh) {
 
 static const gwinVMT consoleVMT = {
 		"Console",				// The classname
+		sizeof(GConsoleObject),	// The object size
 		0,						// The destroy routine
 		0,						// The redraw routine
 		AfterClear,				// The after-clear routine
 };
 
-GHandle gwinCreateConsole(GConsoleObject *gc, coord_t x, coord_t y, coord_t width, coord_t height) {
-	if (!(gc = (GConsoleObject *)_gwindowCreate((GWindowObject *)gc, x, y, width, height, sizeof(GConsoleObject), &consoleVMT, GWIN_FLG_VISIBLE)))
+GHandle gwinCreateConsole(GConsoleObject *gc, GWindowInit *pInit) {
+	if (!(gc = (GConsoleObject *)_gwindowCreate(&gc->g, pInit, &consoleVMT, 0)))
 		return 0;
 	#if GFX_USE_OS_CHIBIOS && GWIN_CONSOLE_USE_BASESTREAM
 		gc->stream.vmt = &GWindowConsoleVMT;
 	#endif
 	gc->cx = 0;
 	gc->cy = 0;
+	gwinSetVisible((GHandle)gc, pInit->show);
 	return (GHandle)gc;
 }
 
diff --git a/src/gwin/graph.c b/src/gwin/graph.c
index 708b90cb..81ce1b5f 100644
--- a/src/gwin/graph.c
+++ b/src/gwin/graph.c
@@ -31,6 +31,7 @@ static const GGraphStyle GGraphDefaultStyle = {
 
 static const gwinVMT graphVMT = {
 		"Graph",				// The classname
+		sizeof(GGraphObject),	// The object size
 		0,						// The destroy routine
 		0,						// The redraw routine
 		0,						// The after-clear routine
@@ -164,12 +165,13 @@ static void lineto(GGraphObject *gg, coord_t x0, coord_t y0, coord_t x1, coord_t
 	}
 }
 
-GHandle gwinCreateGraph(GGraphObject *gg, coord_t x, coord_t y, coord_t width, coord_t height) {
-	if (!(gg = (GGraphObject *)_gwindowCreate((GWindowObject *)gg, x, y, width, height, sizeof(GGraphObject), &graphVMT, GWIN_FLG_VISIBLE)))
+GHandle gwinCreateGraph(GGraphObject *gg, GWindowInit *pInit) {
+	if (!(gg = (GGraphObject *)_gwindowCreate(&gg->g, pInit, &graphVMT, 0)))
 		return 0;
 	gg->xorigin = gg->yorigin = 0;
 	gg->lastx = gg->lasty = 0;
 	gwinGraphSetStyle((GHandle)gg, &GGraphDefaultStyle);
+	gwinSetVisible((GHandle)gg, pInit->show);
 	return (GHandle)gg;
 }
 
diff --git a/src/gwin/gwidget.c b/src/gwin/gwidget.c
index 9d634c58..2825bf4c 100644
--- a/src/gwin/gwidget.c
+++ b/src/gwin/gwidget.c
@@ -165,15 +165,15 @@ void _gwidgetInit(void) {
 	geventRegisterCallback(&gl, gwidgetEvent, 0);
 }
 
-GHandle _gwidgetCreate(GWidgetObject *pgw, coord_t x, coord_t y, coord_t width, coord_t height, size_t size, const gwidgetVMT *vmt) {
-	if (!(pgw = (GWidgetObject *)_gwindowCreate((GWindowObject *)pgw, x, y, width, height, size, (const gwinVMT *)vmt, GWIN_FLG_WIDGET|GWIN_FLG_ENABLED)))
+GHandle _gwidgetCreate(GWidgetObject *pgw, GWidgetInit *pInit, const gwidgetVMT *vmt) {
+	if (!(pgw = (GWidgetObject *)_gwindowCreate(&pgw->g, &pInit->g, &vmt->g, GWIN_FLG_WIDGET|GWIN_FLG_ENABLED)))
 		return 0;
 
-	pgw->txt = "";
+	pgw->txt = pInit->text ? pInit->text : "";
 	pgw->fnDraw = vmt->DefaultDraw;
 	pgw->fnParam = 0;
 
-	return (GHandle)pgw;
+	return 	&pgw->g;
 }
 
 void _gwidgetDestroy(GHandle gh) {
diff --git a/src/gwin/gwin.c b/src/gwin/gwin.c
index b918d297..110d35cc 100644
--- a/src/gwin/gwin.c
+++ b/src/gwin/gwin.c
@@ -21,6 +21,7 @@
 
 static const gwinVMT basegwinVMT = {
 		"GWIN",					// The classname
+		sizeof(GWindowObject),	// The object size
 		0,						// The destroy routine
 		0,						// The redraw routine
 		0,						// The after-clear routine
@@ -51,17 +52,17 @@ static color_t	defaultBgColor = Black;
 		} else
 			gwinClear(gh);
 	}
-	static void _gwm_redim(GHandle gh, coord_t x, coord_t y, coord_t w, coord_t h) {
-		if (x < 0) { w += x; x = 0; }
-		if (y < 0) { h += y; y = 0; }
-		if (x > gdispGetWidth()-MIN_WIN_WIDTH)		x = gdispGetWidth()-MIN_WIN_WIDTH;
-		if (y > gdispGetHeight()-MIN_WIN_HEIGHT)	y = gdispGetHeight()-MIN_WIN_HEIGHT;
-		if (w < MIN_WIN_WIDTH) { w = MIN_WIN_WIDTH; }
-		if (h < MIN_WIN_HEIGHT) { h = MIN_WIN_HEIGHT; }
-		if (x+w > gdispGetWidth()) w = gdispGetWidth() - x;
-		if (y+h > gdispGetHeight()) h = gdispGetHeight() - y;
-		gh->x = x; gh->y = y;
-		gh->width = w; gh->height = h;
+	static void _gwm_redim(GHandle gh, GWindowInit *pInit) {
+		gh->x = pInit->x; gh->y = pInit->y;
+		gh->width = pInit->width; gh->height = pInit->height;
+		if (gh->x < 0) { gh->width += gh->x; gh->x = 0; }
+		if (gh->y < 0) { gh->height += gh->y; gh->y = 0; }
+		if (gh->x > gdispGetWidth()-MIN_WIN_WIDTH)		gh->x = gdispGetWidth()-MIN_WIN_WIDTH;
+		if (gh->y > gdispGetHeight()-MIN_WIN_HEIGHT)	gh->y = gdispGetHeight()-MIN_WIN_HEIGHT;
+		if (gh->width < MIN_WIN_WIDTH) { gh->width = MIN_WIN_WIDTH; }
+		if (gh->height < MIN_WIN_HEIGHT) { gh->height = MIN_WIN_HEIGHT; }
+		if (gh->x+gh->width > gdispGetWidth()) gh->width = gdispGetWidth() - gh->x;
+		if (gh->y+gh->height > gdispGetHeight()) gh->height = gdispGetHeight() - gh->y;
 	}
 #endif
 
@@ -84,10 +85,10 @@ void _gwinInit(void) {
 
 // Internal routine for use by GWIN components only
 // Initialise a window creating it dynamically if required.
-GHandle _gwindowCreate(GWindowObject *pgw, coord_t x, coord_t y, coord_t width, coord_t height, size_t size, const gwinVMT *vmt, uint16_t flags) {
+GHandle _gwindowCreate(GWindowObject *pgw, GWindowInit *pInit, const gwinVMT *vmt, uint16_t flags) {
 	// Allocate the structure if necessary
 	if (!pgw) {
-		if (!(pgw = (GWindowObject *)gfxAlloc(size)))
+		if (!(pgw = (GWindowObject *)gfxAlloc(vmt->size)))
 			return 0;
 		pgw->flags = flags|GWIN_FLG_DYNAMIC;
 	} else
@@ -101,17 +102,15 @@ GHandle _gwindowCreate(GWindowObject *pgw, coord_t x, coord_t y, coord_t width,
 		pgw->font = defaultFont;
 	#endif
 
-	#if GWIN_NEED_WINDOWMANAGER
-		if (!cwm->vmt->Add(pgw, x, y, width, height)) {
-			if ((pgw->flags & GWIN_FLG_DYNAMIC))
-				gfxFree(pgw);
-			return 0;
-		}
-	#else
-		_gwm_redim(pgw, x, y, width, height);
-		if ((pgw->flags & GWIN_FLG_VISIBLE))
-			_gwm_vis(pgw);
-	#endif
+#if GWIN_NEED_WINDOWMANAGER
+	if (!cwm->vmt->Add(pgw, pInit)) {
+		if ((pgw->flags & GWIN_FLG_DYNAMIC))
+			gfxFree(pgw);
+		return 0;
+	}
+#else
+	_gwm_redim(pgw, pInit->x, pInit->y, pInit->width, pInit->height);
+#endif
 
 	return (GHandle)pgw;
 }
@@ -150,8 +149,11 @@ void gwinSetDefaultBgColor(color_t bgclr) {
  * The GWindow Routines
  *-----------------------------------------------*/
 
-GHandle gwinCreateWindow(GWindowObject *pgw, coord_t x, coord_t y, coord_t width, coord_t height) {
-	return _gwindowCreate(pgw, x, y, width, height, sizeof(GWindowObject), &basegwinVMT, GWIN_FLG_VISIBLE);
+GHandle gwinCreateWindow(GWindowObject *pgw, GWindowInit *pInit) {
+	if (!(pgw = _gwindowCreate(pgw, pInit, &basegwinVMT, 0)))
+		return 0;
+	gwinSetVisible(pgw, pInit->show);
+	return pgw;
 }
 
 void gwinDestroy(GHandle gh) {
diff --git a/src/gwin/gwm.c b/src/gwin/gwm.c
index 5a533c40..c3405d83 100644
--- a/src/gwin/gwm.c
+++ b/src/gwin/gwm.c
@@ -25,7 +25,7 @@
 
 static void WM_Init(void);
 static void WM_DeInit(void);
-static bool_t WM_Add(GHandle gh, coord_t x, coord_t y, coord_t w, coord_t h);
+static bool_t WM_Add(GHandle gh, GWindowInit *pInit);
 static void WM_Delete(GHandle gh);
 static void WM_Visible(GHandle gh);
 static void WM_Redim(GHandle gh, coord_t x, coord_t y, coord_t w, coord_t h);
@@ -65,12 +65,12 @@ static void WM_DeInit(void) {
 	// A full window manager would remove any borders etc
 }
 
-static bool_t WM_Add(GHandle gh, coord_t x, coord_t y, coord_t w, coord_t h) {
+static bool_t WM_Add(GHandle gh, GWindowInit *pInit) {
 	// Put it on the queue
 	gfxQueueASyncPut(&_GWINList, &gh->wmq);
 
 	// Make sure the size is valid
-	WM_Redim(gh, x, y, w, h);
+	WM_Redim(gh, pInit->x, pInit->y, pInit->width, pInit->height);
 
 	// Display it if it is visible
 	WM_Visible(gh);
diff --git a/src/gwin/slider.c b/src/gwin/slider.c
index f2052524..08dd6ca7 100644
--- a/src/gwin/slider.c
+++ b/src/gwin/slider.c
@@ -43,6 +43,7 @@ static uint16_t DialGet(GWidgetObject *gw, uint16_t role);
 static const gwidgetVMT sliderVMT = {
 	{
 		"Slider",				// The classname
+		sizeof(GSliderObject),	// The object size
 		_gwidgetDestroy,		// The destroy routine
 		_gwidgetRedraw,			// The redraw routine
 		0,						// The after-clear routine
@@ -232,8 +233,8 @@ static uint16_t DialGet(GWidgetObject *gw, uint16_t role) {
 	return ((GSliderObject *)gw)->dial;
 }
 
-GHandle gwinCreateSlider(GSliderObject *gs, coord_t x, coord_t y, coord_t width, coord_t height) {
-	if (!(gs = (GSliderObject *)_gwidgetCreate((GWidgetObject *)gs, x, y, width, height, sizeof(GSliderObject), &sliderVMT)))
+GHandle gwinCreateSlider(GSliderObject *gs, GWidgetInit *pInit) {
+	if (!(gs = (GSliderObject *)_gwidgetCreate(&gs->w, pInit, &sliderVMT)))
 		return 0;
 	gs->t_dn = (uint16_t) -1;
 	gs->t_up = (uint16_t) -1;
@@ -243,6 +244,7 @@ GHandle gwinCreateSlider(GSliderObject *gs, coord_t x, coord_t y, coord_t width,
 	gs->max = 100;
 	gs->pos = 0;
 	ResetDisplayPos(gs);
+	gwinSetVisible((GHandle)gs, pInit->g.show);
 	return (GHandle)gs;
 }