Merge pull request #58 from inmarket/master

GWIN Slider plus other cleanups

1 files changed, 281 insertions, 0 deletions

diff --git a/src/gwin/slider.c b/src/gwin/slider.c
new file mode 100644
index 00000000..034ba6b2
--- /dev/null
+++ b/src/gwin/slider.c
@@ -0,0 +1,281 @@
+/*
+    ChibiOS/GFX - Copyright (C) 2012, 2013
+                 Joel Bodenmann aka Tectu <joel@unormal.org>
+
+    This file is part of ChibiOS/GFX.
+
+    ChibiOS/GFX is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    ChibiOS/GFX is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * @file    src/gwin/slider.c
+ * @brief   GWIN sub-system slider code.
+ *
+ * @defgroup Slider Slider
+ * @ingroup GWIN
+ *
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+#include "gfx.h"
+
+#if (GFX_USE_GWIN && GWIN_NEED_SLIDER) || defined(__DOXYGEN__)
+
+#include "gwin/internal.h"
+
+#ifndef GWIN_SLIDER_DEAD_BAND
+	#define GWIN_SLIDER_DEAD_BAND	5
+#endif
+
+static void trackSliderDraw(GHandle gh, coord_t x, coord_t y);
+
+static const GSliderDrawStyle GSliderDefaultStyle = {
+	HTML2COLOR(0x404040),		// color_edge;
+	HTML2COLOR(0x000000),		// color_thumb;
+	HTML2COLOR(0x00E000),		// color_active;
+	HTML2COLOR(0xE0E0E0),		// color_inactive;
+};
+
+// Process an event callback
+static void gwinSliderCallback(void *param, GEvent *pe) {
+	GSourceListener	*psl;
+	#define gh		((GHandle)param)
+	#define gsw		((GSliderObject *)param)
+	#define gsh		((GSourceHandle)param)
+	#define pme		((GEventMouse *)pe)
+	#define pse		((GEventGWinSlider *)pe)
+
+	switch (pe->type) {
+	#if defined(GINPUT_NEED_MOUSE) && GINPUT_NEED_MOUSE
+		case GEVENT_MOUSE:
+		case GEVENT_TOUCH:
+			// If not tracking we only only interested in a mouse down over the slider
+			if (!gsw->tracking) {
+				if ((pme->meta & GMETA_MOUSE_DOWN)
+						&& pme->x >= gh->x && pme->x < gh->x + gh->width
+						&& pme->y >= gh->y && pme->y < gh->y + gh->height) {
+					gsw->tracking = TRUE;
+					trackSliderDraw(gh, pme->x-gh->x, pme->y-gh->y);
+				}
+				return;
+			}
+
+			// We are tracking the mouse
+
+			// Test for button up
+			if ((pme->meta & GMETA_MOUSE_UP)) {
+				gsw->tracking = FALSE;
+
+				#if !GWIN_BUTTON_LAZY_RELEASE
+					// Are we over the slider?
+					if (pme->x < gh->x || pme->x >= gh->x + gh->width
+							|| pme->y < gh->y || pme->y >= gh->y + gh->height) {
+						// No - restore the slider
+						gwinSliderDraw(gh);
+						return;
+					}
+				#endif
+
+				// Set the new position
+				if (gh->width < gh->height)
+					gwinSetSliderPosition(gh,
+						(gh->height-1-pme->y+gh->y-GWIN_SLIDER_DEAD_BAND)*(gsw->max-gsw->min)/(gh->height-2*GWIN_SLIDER_DEAD_BAND) + gsw->min);
+				else
+					gwinSetSliderPosition(gh,
+						(pme->x-gh->x-GWIN_SLIDER_DEAD_BAND)*(gsw->max-gsw->min)/(gh->width-2*GWIN_SLIDER_DEAD_BAND) + gsw->min);
+
+				// Update the display
+				gwinSliderDraw(gh);
+
+				// Generate the event
+				break;
+			}
+
+			// If mouse down - track movement
+			if ((pme->current_buttons & GINPUT_MOUSE_BTN_LEFT))
+				trackSliderDraw(gh, pme->x-gh->x, pme->y-gh->y);
+
+			return;
+	#endif
+
+	default:
+		return;
+	}
+
+	// Trigger a GWIN Slider Event
+	psl = 0;
+	while ((psl = geventGetSourceListener(gsh, psl))) {
+		if (!(pe = geventGetEventBuffer(psl)))
+			continue;
+		pse->type = GEVENT_GWIN_SLIDER;
+		pse->slider = gh;
+		pse->position = gsw->pos;
+		geventSendEvent(psl);
+	}
+
+	#undef pse
+	#undef pme
+	#undef pxe
+	#undef gsh
+	#undef gsw
+	#undef gh
+}
+
+GHandle gwinCreateSlider(GSliderObject *gs, coord_t x, coord_t y, coord_t width, coord_t height) {
+	if (!(gs = (GSliderObject *)_gwinInit((GWindowObject *)gs, x, y, width, height, sizeof(GSliderObject))))
+		return 0;
+	gs->gwin.type = GW_SLIDER;
+	gs->fn = gwinSliderDraw_Std;
+	gs->param = 0;
+	gwinSetSliderStyle(&gs->gwin, &GSliderDefaultStyle);
+	gs->min = 0;
+	gs->max = 100;
+	gs->pos = 0;
+	gs->tracking = FALSE;
+	geventListenerInit(&gs->listener);
+	geventRegisterCallback(&gs->listener, gwinSliderCallback, gs);
+	return (GHandle)gs;
+}
+
+void gwinSetSliderRange(GHandle gh, int min, int max) {
+	#define gsw		((GSliderObject *)gh)
+
+	if (gh->type != GW_SLIDER)
+		return;
+
+	if (min == max)		// prevent divide by 0 errors.
+		max++;
+	gsw->min = min;
+	gsw->max = max;
+	gsw->pos = min;
+	#undef gsw
+}
+
+void gwinSetSliderPosition(GHandle gh, int pos) {
+	#define gsw		((GSliderObject *)gh)
+
+	if (gh->type != GW_SLIDER)
+		return;
+
+	if (gsw->min <= gsw->max) {
+		if (pos < gsw->min) gsw->pos = gsw->min;
+		else if (pos > gsw->max) gsw->pos = gsw->max;
+		else gsw->pos = pos;
+	} else {
+		if (pos > gsw->min) gsw->pos = gsw->min;
+		else if (pos < gsw->max) gsw->pos = gsw->max;
+		else gsw->pos = pos;
+	}
+	#undef gsw
+}
+
+void gwinSetSliderStyle(GHandle gh, const GSliderDrawStyle *pStyle) {
+	#define gsw		((GSliderObject *)gh)
+
+	if (gh->type != GW_SLIDER)
+		return;
+
+	gsw->style.color_edge		= pStyle->color_edge;
+	gsw->style.color_thumb	= pStyle->color_thumb;
+	gsw->style.color_active	= pStyle->color_active;
+	gsw->style.color_inactive	= pStyle->color_inactive;
+	#undef gsw
+}
+
+static void trackSliderDraw(GHandle gh, coord_t x, coord_t y) {
+	#define gsw		((GSliderObject *)gh)
+
+	#if GDISP_NEED_CLIP
+		gdispSetClip(gh->x, gh->y, gh->width, gh->height);
+	#endif
+	
+	if (gh->height <= gh->width)
+		gsw->fn(gh, FALSE, x, &gsw->style, gsw->param);
+	else
+		gsw->fn(gh, TRUE, y, &gsw->style, gsw->param);
+
+	#undef gbw
+}
+
+void gwinSliderDraw(GHandle gh) {
+	#define gsw		((GSliderObject *)gh)
+	
+	if (gh->type != GW_SLIDER)
+		return;
+
+	#if GDISP_NEED_CLIP
+		gdispSetClip(gh->x, gh->y, gh->width, gh->height);
+	#endif
+
+	if (gh->height <= gh->width)
+		gsw->fn(gh, FALSE, ((gh->width-1)*(gsw->pos-gsw->min))/(gsw->max-gsw->min), &gsw->style, gsw->param);
+	else
+		gsw->fn(gh, TRUE, gh->height-1-((gh->height-1)*(gsw->pos-gsw->min))/(gsw->max-gsw->min), &gsw->style, gsw->param);
+
+	#undef gbw
+}
+
+void gwinSetSliderCustom(GHandle gh, GSliderDrawFunction fn, void *param) {
+	#define gsw		((GSliderObject *)gh)
+
+	if (gh->type != GW_SLIDER)
+		return;
+
+	gsw->fn = fn ? fn : gwinSliderDraw_Std;
+	gsw->param = param;
+
+	#undef gsw
+}
+
+void gwinSliderDraw_Std(GHandle gh, bool_t isVertical, coord_t thumbpos, const GSliderDrawStyle *pstyle, void *param) {
+	(void) param;
+
+	if (isVertical) {
+		if (thumbpos != gh->height-1)
+			gdispFillArea(gh->x, gh->y+thumbpos, gh->width, gh->height - thumbpos, pstyle->color_active);
+		if (thumbpos != 0)
+			gdispFillArea(gh->x, gh->y, gh->width, thumbpos, pstyle->color_inactive);
+		gdispDrawBox(gh->x, gh->y, gh->width, gh->height, pstyle->color_edge);
+		gdispDrawLine(gh->x, gh->y+thumbpos, gh->x+gh->width-1, gh->y+thumbpos, pstyle->color_thumb);
+		if (thumbpos >= 2)
+			gdispDrawLine(gh->x, gh->y+thumbpos-2, gh->x+gh->width-1, gh->y+thumbpos-2, pstyle->color_thumb);
+		if (thumbpos <= gh->height-2)
+			gdispDrawLine(gh->x, gh->y+thumbpos+2, gh->x+gh->width-1, gh->y+thumbpos+2, pstyle->color_thumb);
+	} else {
+		if (thumbpos != gh->width-1)
+			gdispFillArea(gh->x+thumbpos, gh->y, gh->width-thumbpos, gh->height, pstyle->color_inactive);
+		if (thumbpos != 0)
+			gdispFillArea(gh->x, gh->y, thumbpos, gh->height, pstyle->color_active);
+		gdispDrawBox(gh->x, gh->y, gh->width, gh->height, pstyle->color_edge);
+		gdispDrawLine(gh->x+thumbpos, gh->y, gh->x+thumbpos, gh->y+gh->height-1, pstyle->color_thumb);
+		if (thumbpos >= 2)
+			gdispDrawLine(gh->x+thumbpos-2, gh->y, gh->x+thumbpos-2, gh->y+gh->height-1, pstyle->color_thumb);
+		if (thumbpos <= gh->width-2)
+			gdispDrawLine(gh->x+thumbpos+2, gh->y, gh->x+thumbpos+2, gh->y+gh->height-1, pstyle->color_thumb);
+	}
+}
+
+#if defined(GINPUT_NEED_MOUSE) && GINPUT_NEED_MOUSE
+	bool_t gwinAttachSliderMouseSource(GHandle gh, GSourceHandle gsh) {
+		if (gh->type != GW_SLIDER)
+			return FALSE;
+
+		return geventAttachSource(&((GSliderObject *)gh)->listener, gsh, GLISTEN_MOUSEMETA|GLISTEN_MOUSEDOWNMOVES);
+	}
+#endif
+
+#endif /* GFX_USE_GWIN && GWIN_NEED_BUTTON */
+/** @} */
+