From 5d81aa2487f8a41d64ad49bd04f29850b2371dd0 Mon Sep 17 00:00:00 2001
From: Joel Bodenmann <joel@seriouslyembedded.com>
Date: Sat, 7 Nov 2015 00:51:23 +0100
Subject: [PATCH] Adding rendering functions to label widget to control text
 justification

---
 src/gwin/gwin_label.c | 41 +++++++++++++++++++++++++++++------------
 src/gwin/gwin_label.h | 26 ++++++++++++++++++++++++--
 2 files changed, 53 insertions(+), 14 deletions(-)

diff --git a/src/gwin/gwin_label.c b/src/gwin/gwin_label.c
index 9b62679f..97311a3e 100644
--- a/src/gwin/gwin_label.c
+++ b/src/gwin/gwin_label.c
@@ -42,13 +42,13 @@ static coord_t getheight(const char *text, font_t font, coord_t maxwidth) {
 
 static const gwidgetVMT labelVMT = {
 	{
-		"Label",				// The class name
-		sizeof(GLabelObject),	// The object size
-		_gwidgetDestroy,		// The destroy routine
-		_gwidgetRedraw, 		// The redraw routine
-		0,						// The after-clear routine
+		"Label",					// The class name
+		sizeof(GLabelObject),		// The object size
+		_gwidgetDestroy,			// The destroy routine
+		_gwidgetRedraw, 			// The redraw routine
+		0,							// The after-clear routine
 	},
-	gwinLabelDefaultDraw,		// default drawing routine
+	gwinLabelDrawJustifiedLeft,		// default drawing routine
 	#if GINPUT_NEED_MOUSE
 		{
 			0,						// Process mose down events (NOT USED)
@@ -134,10 +134,9 @@ void gwinLabelSetBorder(GHandle gh, bool_t border) {
 	}
 #endif // GWIN_LABEL_ATTRIBUTE
 
-void gwinLabelDefaultDraw(GWidgetObject *gw, void *param) {
+static void gwinLabelDraw(GWidgetObject *gw, justify_t justify) {
 	coord_t				w, h;
 	color_t				c;
-	(void)				param;
 
 	// is it a valid handle?
 	if (gw->g.vmt != (gwinVMT *)&labelVMT)
@@ -163,12 +162,12 @@ void gwinLabelDefaultDraw(GWidgetObject *gw, void *param) {
 
 	#if GWIN_LABEL_ATTRIBUTE
 		if (gw2obj->attr) {
-			gdispGFillStringBox(gw->g.display, gw->g.x, gw->g.y, gw2obj->tab, h, gw2obj->attr, gw->g.font, c, gw->pstyle->background, justifyLeft);
-			gdispGFillStringBox(gw->g.display, gw->g.x + gw2obj->tab, gw->g.y, w-gw2obj->tab, h, gw->text, gw->g.font, c, gw->pstyle->background, justifyLeft);
+			gdispGFillStringBox(gw->g.display, gw->g.x, gw->g.y, gw2obj->tab, h, gw2obj->attr, gw->g.font, c, gw->pstyle->background, justify);
+			gdispGFillStringBox(gw->g.display, gw->g.x + gw2obj->tab, gw->g.y, w-gw2obj->tab, h, gw->text, gw->g.font, c, gw->pstyle->background, justify);
 		} else
-			gdispGFillStringBox(gw->g.display, gw->g.x, gw->g.y, w, h, gw->text, gw->g.font, c, gw->pstyle->background, justifyLeft);
+			gdispGFillStringBox(gw->g.display, gw->g.x, gw->g.y, w, h, gw->text, gw->g.font, c, gw->pstyle->background, justify);
 	#else
-		gdispGFillStringBox(gw->g.display, gw->g.x, gw->g.y, w, h, gw->text, gw->g.font, c, gw->pstyle->background, justifyLeft);
+		gdispGFillStringBox(gw->g.display, gw->g.x, gw->g.y, w, h, gw->text, gw->g.font, c, gw->pstyle->background, justify);
 	#endif
 
 	// render the border (if any)
@@ -176,6 +175,24 @@ void gwinLabelDefaultDraw(GWidgetObject *gw, void *param) {
 		gdispGDrawBox(gw->g.display, gw->g.x, gw->g.y, w, h, (gw->g.flags & GWIN_FLG_SYSENABLED) ? gw->pstyle->enabled.edge : gw->pstyle->disabled.edge);
 }
 
+void gwinLabelDrawJustifiedLeft(GWidgetObject *gw, void *param) {
+	(void)param;
+	
+	gwinLabelDraw(gw, justifyLeft);
+}
+
+void gwinLabelDrawJustifiedRight(GWidgetObject *gw, void *param) {
+	(void)param;
+	
+	gwinLabelDraw(gw, justifyRight);
+}
+
+void gwinLabelDrawJustifiedCenter(GWidgetObject *gw, void *param) {
+	(void)param;
+	
+	gwinLabelDraw(gw, justifyCenter);
+}
+
 #undef gh2obj
 #undef gw2obj
 #endif // GFX_USE_GWIN && GFX_NEED_LABEL
diff --git a/src/gwin/gwin_label.h b/src/gwin/gwin_label.h
index aaacd253..d9abe0e0 100644
--- a/src/gwin/gwin_label.h
+++ b/src/gwin/gwin_label.h
@@ -117,14 +117,36 @@ void gwinLabelSetBorder(GHandle gh, bool_t border);
  */
 
 /**
- * @brief				The default rendering function for the label widget
+ * @brief				Renders a label with the text left jestified.
+ *
+ * @note				This is the default rendering function.
  *
  * @param[in] gw		The widget object (must be a label object)
  * @param[in] param		A parameter passed in from the user. Ignored by this function.
  *
  * @api
  */
-void gwinLabelDefaultDraw(GWidgetObject *gw, void *param);
+void gwinLabelDrawJustifiedLeft(GWidgetObject *gw, void *param);
+
+/**
+ * @brief				Renders a label with the text right jestified.
+ *
+ * @param[in] gw		The widget object (must be a label object)
+ * @param[in] param		A parameter passed in from the user. Ignored by this function.
+ *
+ * @api
+ */
+void gwinLabelDrawJustifiedRight(GWidgetObject *gw, void *param);
+
+/**
+ * @brief				Renders a label with the text center jestified.
+ *
+ * @param[in] gw		The widget object (must be a label object)
+ * @param[in] param		A parameter passed in from the user. Ignored by this function.
+ *
+ * @api
+ */
+void gwinLabelDrawJustifiedCenter(GWidgetObject *gw, void *param);
 
 /** @} */