Plot the temperature Graph

Signed-off-by: Tomaz Canabrava <tcanabrava@kde.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

profile.c

@@ -201,6 +201,32 @@ void remember_event(const char *eventname)
 	evn_used++;
 }
 
+int setup_temperature_limits(struct graphics_context *gc, struct plot_info *pi)
+{
+	int maxtime, mintemp, maxtemp, delta;
+
+	/* Get plot scaling limits */
+	maxtime = get_maxtime(pi);
+	mintemp = pi->mintemp;
+	maxtemp = pi->maxtemp;
+
+	gc->leftx = 0; gc->rightx = maxtime;
+	/* Show temperatures in roughly the lower third, but make sure the scale
+	   is at least somewhat reasonable */
+	delta = maxtemp - mintemp;
+	if (delta < 3000) /* less than 3K in fluctuation */
+		delta = 3000;
+	gc->topy = maxtemp + delta*2;
+
+	if (PP_GRAPHS_ENABLED)
+		gc->bottomy = mintemp - delta * 2;
+	else
+		gc->bottomy = mintemp - delta / 3;
+
+	pi->endtempcoord = SCALEY(gc, pi->mintemp);
+	return maxtemp && maxtemp >= mintemp;
+}
+
 #if 0
 static void render_depth_sample(struct graphics_context *gc, struct plot_data *entry, const text_render_options_t *tro)
 {
@@ -441,31 +467,7 @@ static void plot_pp_gas_profile(struct graphics_context *gc, struct plot_info *p
 }
 
 
-static int setup_temperature_limits(struct graphics_context *gc, struct plot_info *pi)
-{
-	int maxtime, mintemp, maxtemp, delta;
 
-	/* Get plot scaling limits */
-	maxtime = get_maxtime(pi);
-	mintemp = pi->mintemp;
-	maxtemp = pi->maxtemp;
-
-	gc->leftx = 0; gc->rightx = maxtime;
-	/* Show temperatures in roughly the lower third, but make sure the scale
-	   is at least somewhat reasonable */
-	delta = maxtemp - mintemp;
-	if (delta < 3000) /* less than 3K in fluctuation */
-		delta = 3000;
-	gc->topy = maxtemp + delta*2;
-
-	if (PP_GRAPHS_ENABLED)
-		gc->bottomy = mintemp - delta * 2;
-	else
-		gc->bottomy = mintemp - delta / 3;
-
-	pi->endtempcoord = SCALEY(gc, pi->mintemp);
-	return maxtemp && maxtemp >= mintemp;
-}
 
 static void plot_single_temp_text(struct graphics_context *gc, int sec, int mkelvin)
 {
@@ -515,35 +517,6 @@ static void plot_temperature_text(struct graphics_context *gc, struct plot_info
 		plot_single_temp_text(gc, sec, last_temperature);
 }
 
-static void plot_temperature_profile(struct graphics_context *gc, struct plot_info *pi)
-{
-	int i;
-	cairo_t *cr = gc->cr;
-	int last = 0;
-
-	if (!setup_temperature_limits(gc, pi))
-		return;
-
-	cairo_set_line_width_scaled(gc->cr, 2);
-	set_source_rgba(gc, TEMP_PLOT);
-	for (i = 0; i < pi->nr; i++) {
-		struct plot_data *entry = pi->entry + i;
-		int mkelvin = entry->temperature;
-		int sec = entry->sec;
-		if (!mkelvin) {
-			if (!last)
-				continue;
-			mkelvin = last;
-		}
-		if (last)
-			line_to(gc, sec, mkelvin);
-		else
-			move_to(gc, sec, mkelvin);
-		last = mkelvin;
-	}
-	cairo_stroke(cr);
-}
-
 /* gets both the actual start and end pressure as well as the scaling factors */
 static int get_cylinder_pressure_range(struct graphics_context *gc, struct plot_info *pi)
 {

profile.h

@@ -38,6 +38,7 @@ struct plot_data {
 
 void calculate_max_limits(struct dive *dive, struct divecomputer *dc, struct graphics_context *gc);
 struct plot_info *create_plot_info(struct dive *dive, struct divecomputer *dc, struct graphics_context *gc);
+int setup_temperature_limits(struct graphics_context *gc, struct plot_info *pi);
 
 struct ev_select {
 	char *ev_name;
@@ -83,6 +84,10 @@ int get_maxdepth(struct plot_info *pi);
 #define MIDDLE (0)
 #define BOTTOM (-1)
 
+#define SCALEX(gc,x)  (((x)-gc->leftx)/(gc->rightx-gc->leftx)*gc->maxx)
+#define SCALEY(gc,y)  (((y)-gc->topy)/(gc->bottomy-gc->topy)*gc->maxy)
+#define SCALE(gc,x,y) SCALEX(gc,x),SCALEY(gc,y)
+
 #ifdef __cplusplus
 }
 #endif

qt-ui/profilegraphics.cpp

@@ -26,10 +26,6 @@
 #define VELOCITY_COLORS_START_IDX VELO_STABLE
 #define VELOCITY_COLORS 5
 
-/* Scale to 0,0 -> maxx,maxy */
-#define SCALEX(gc,x)  (((x)-gc->leftx)/(gc->rightx-gc->leftx)*gc->maxx)
-#define SCALEY(gc,y)  (((y)-gc->topy)/(gc->bottomy-gc->topy)*gc->maxy)
-#define SCALE(gc,x,y) SCALEX(gc,x),SCALEY(gc,y)
 
 static struct graphics_context last_gc;
 static double plot_scale = SCALE_SCREEN;
@@ -246,10 +242,10 @@ void ProfileGraphicsView::plot(struct dive *dive)
 	plot_depth_profile(&gc, pi);
 
 	plot_events(&gc, pi, dc);
-#if 0
-	/* Temperature profile */
-	plot_temperature_profile(gc, pi);
 
+	/* Temperature profile */
+	plot_temperature_profile(&gc, pi);
+#if 0
 	/* Cylinder pressure plot */
 	plot_cylinder_pressure(gc, pi, dive, dc);
 
@@ -630,6 +626,41 @@ void ProfileGraphicsView::resizeEvent(QResizeEvent *event)
 	fitInView ( r.x() - 50, r.y() -50, r.width() + 100, r.height() + 100); // do a little bit of spacing;
 }
 
+void ProfileGraphicsView::plot_temperature_profile(struct graphics_context *gc, struct plot_info *pi)
+{
+	int last = 0;
+
+	if (!setup_temperature_limits(gc, pi))
+		return;
+
+	QPointF from;
+	QPointF to;
+	QColor color = profile_color[TEMP_PLOT].first();
+
+	for (int i = 0; i < pi->nr; i++) {
+		struct plot_data *entry = pi->entry + i;
+		int mkelvin = entry->temperature;
+		int sec = entry->sec;
+		if (!mkelvin) {
+			if (!last)
+				continue;
+			mkelvin = last;
+		}
+		if (last){
+			to = QPointF(SCALE(gc, sec, mkelvin));
+			//qDebug() << from << to;
+			QGraphicsLineItem *item = new QGraphicsLineItem(from.x(), from.y(), to.x(), to.y());
+			item->setPen(QPen(color, 2*plot_scale));
+			scene()->addItem(item);
+			from = to;
+		}
+		else{
+			from = QPointF(SCALE(gc, sec, mkelvin));
+		}
+		last = mkelvin;
+	}
+}
+
 void ToolTipItem::addToolTip(const QString& toolTip, const QIcon& icon)
 {
 	QGraphicsPixmapItem *iconItem = 0;

qt-ui/profilegraphics.h

@@ -94,6 +94,7 @@ private:
 	void plot_text(struct graphics_context *gc, text_render_options_t *tro, double x, double y, const QString &text);
 	void plot_events(struct graphics_context *gc, struct plot_info *pi, struct divecomputer *dc);
 	void plot_one_event(struct graphics_context *gc, struct plot_info *pi, struct event *event);
+	void plot_temperature_profile(struct graphics_context *gc, struct plot_info *pi);
 
 	QPen defaultPen;
 	QBrush defaultBrush;