list widget - work in progress

include/gos/linux.h

@@ -16,6 +16,7 @@
 #if GFX_USE_OS_LINUX
 
 #include <sys/types.h>
+#include <stdlib.h>
 #include <stdint.h>
 #include <pthread.h>
 

include/gwin/list.h

@@ -37,13 +37,16 @@
  * @brief	A list event
  */
 typedef struct GEventGWinList {
-	GEventType		type;			// The type of this event (GEVENT_GWIN_LIST)
-	GHandle			list;			// THe list that has generated the event
+	GEventType		type;		// The type of this event (GEVENT_GWIN_LIST)
+	GHandle			list;		// The list
+	int				item;		// The item that has been selected (or unselected in a multi-select listbox)
 } GEventGWinList;
 
 // A list window
 typedef struct GListObject {
 	GWidgetObject	w;
+	int				cnt;		// Number of items currently in the list (quicker than counting each time)
+	gfxQueueASync	list_head;	// The list of items
 } GListObject;
 
 #ifdef __cplusplus
@@ -52,6 +55,8 @@ extern "C" {
 
 GHandle gwinListCreate(GListObject *widget, GWidgetInit *pInit);
 
+int gwinListAddItem(GHandle gh, const char* item, bool_t useAlloc);
+
 #ifdef __cplusplus
 }
 #endif

src/gwin/list.c

@@ -20,11 +20,106 @@
 #if GFX_USE_GWIN && GWIN_NEED_LIST
 
 #include "gwin/class_gwin.h"
+#include <string.h>
+
+#define widget(gh)	((GListObject *)gh)
+
+#define GLIST_FLG_MULTISELECT		(GWIN_FIRST_CONTROL_FLAG << 0)
+#define GLIST_FLG_HASIMAGES			(GWIN_FIRST_CONTROL_FLAG << 1)
+#define GLIST_FLG_SELECTED			(GWIN_FIRST_CONTROL_FLAG << 2)
+
+/*
+Use gw->pstyle->background for the unselected fill.
+Use gw->pstyle->enabled/disabled->text for unselected text color
+Use gw->pstyle->enabled/disabled->edge for the surounding box
+Use gw->pstyle->enabled/disabled->fill for the selected text fill
+or gw->pstyle->pressed->fill for the selected text fill (which ever looks best)
+and use gw->pstyle->pressed->text for the selected text color
+*/
+
+typedef struct ListItem {
+	gfxQueueASyncItem	q_item;		// This must be the first member in the struct
+
+	uint16_t 			id;
+	uint16_t			flags;
+	    #define LISTITEM_ALLOCEDTEXT      0x0001
+	    #define LISTITEM_SELECTED         0x0002
+	uint16_t			uparam;
+	const char*			text;
+	#if GWIN_LIST_IMAGES
+	gdispImage*			pimg;
+	#endif
+} ListItem;
+
+static void sendListEvent(GWidgetObject *gw) {
+	GSourceListener*	psl;
+	GEvent*				pe;
+	#define pse			((GEventGWinList *)pe)
+
+	// Trigger a GWIN list event
+	psl = 0;
+	while ((psl = geventGetSourceListener(GWIDGET_SOURCE, psl))) {
+		if (!(pe = geventGetEventBuffer(psl)))
+			continue
+
+		pse->type = GEVENT_GWIN_SLIDER;
+		pse->list = (GHandle)gw;
+		pse->item = 42;
+
+		geventSendEvent(psl);
+	}
+
+	#undef pse	
+}
 
 static void gwinListDefaultDraw(GWidgetObject* gw, void* param) {
+	#define gcw			((GListObject *)gw)
+	(void)param;
 
+	uint16_t i, fheight;
+	gfxQueueASyncItem* qi;
+
+	fheight = gdispGetFontMetric(gwinGetDefaultFont(), fontHeight);	
+
+	gdispDrawBox(gw->g.x, gw->g.y, gw->g.width, gw->g.height, Black);
+	
+	for (qi = gfxQueueASyncPeek(&gcw->list_head), i = 0; qi; qi = gfxQueueASyncNext(qi), i += fheight + 4) {
+		if (((ListItem*)qi)->flags & GLIST_FLG_SELECTED) 
+			gdispFillStringBox(gw->g.x + 3, gw->g.y + 3 + i, gw->g.width - 6, fheight, ((ListItem*)qi)->text, gwinGetDefaultFont(), White, Black, justifyLeft);
+		else
+			gdispFillStringBox(gw->g.x + 3, gw->g.y + 3 + i, gw->g.width - 6, fheight, ((ListItem*)qi)->text, gwinGetDefaultFont(), Black, White, justifyLeft);
+	}
+
+	#undef gcw
 }
 
+#if GINPUT_NEED_MOUSE
+	// A mouse down has occured over the list area
+	static void MouseDown(GWidgetObject* gw, coord_t x, coord_t y) {
+		#define gcw			((GListObject *)gw)
+
+		uint16_t i, item_id, item_height;
+		gfxQueueASyncItem* qi;
+
+		item_height = gdispGetFontMetric(gwinGetDefaultFont(), fontHeight) + 2;
+
+		item_id = (y - gw->g.y) / item_height;
+		printf("item_id = %d\r\n", item_id);
+
+		for(qi = gfxQueueASyncPeek(&gcw->list_head), i = 0; qi; qi = gfxQueueASyncNext(qi), i++) {
+			if (item_id == i)
+				((ListItem*)qi)->flags |= GLIST_FLG_SELECTED;
+			else
+				((ListItem*)qi)->flags &=~ GLIST_FLG_SELECTED;
+		}
+
+		_gwidgetRedraw((GHandle)gw);
+		sendListEvent(gw);
+
+		#undef gcw
+	}
+#endif
+
 static const gwidgetVMT listVMT = {
 	{
 		"List",					// The class name
@@ -34,9 +129,9 @@ static const gwidgetVMT listVMT = {
 		0,						// The after-clear routine
 	},
 	gwinListDefaultDraw,		// default drawing routine
-	#if GWINPUT_NEED_MOUSE
+	#if GINPUT_NEED_MOUSE
 		{
-			0,
+			MouseDown,
 			0,
 			0,
 		},
@@ -64,11 +159,55 @@ GHandle gwinListCreate(GListObject* widget, GWidgetInit* pInit) {
 	if (!(widget = (GListObject *)_gwidgetCreate(&widget->w, pInit, &listVMT)))
 		return 0;
 
+	// initialize the item queue
+	gfxQueueASyncInit(&(widget->list_head));
+	widget->cnt = 0;
+
 	gwinSetVisible(&widget->w.g, pInit->g.show);
 
 	return (GHandle)widget;
 }
 
+int gwinListAddItem(GHandle gh, const char* item_name, bool_t useAlloc) {
+	ListItem* newItem;
+
+	if (useAlloc) {
+		newItem = gfxAlloc(sizeof(newItem) + strlen(item_name) + 1);
+
+		// allocate string
+		newItem->text = gfxAlloc(strlen(item_name) + 1);
+		if (newItem->text == NULL)
+			return -1;
+
+		// assign text
+		newItem->text = item_name;		
+
+	} else {
+		newItem = gfxAlloc(sizeof(newItem));
+
+		if (newItem == NULL)
+			return -1;
+	}
+
+	// the item is not selected when added
+	newItem->flags &=~ GLIST_FLG_SELECTED;
+
+	// add the new item to the list
+	gfxQueueASyncPut(&(widget(gh)->list_head), &newItem->q_item);
+
+	// increment the total amount of entries in the list widget
+	widget(gh)->cnt++;
+}
+
+int gwinListGetSelected(GHandle gh) {
+	gfxQueueASyncItem* qi;
+	uint16_t i;
+
+	//for(qi = gfxQueueASyncPeek(&gcw->list_head), i = 0; qi; qi = gfxQueueASyncNext(qi), i++) {
+
+	
+}
+
 #endif // GFX_USE_GWIN && GWIN_NEED_LIST
 /** @} */