From 6b3369106d9fe06300bc7d2a032230a21bc2a497 Mon Sep 17 00:00:00 2001
From: Xiao Pan <xyz@flylightning.xyz>
Date: Fri, 25 Apr 2025 01:15:58 -0700
Subject: checkbutton now can add remove plots

---
 remote_plot.c | 70 +++++++++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 51 insertions(+), 19 deletions(-)

diff --git a/remote_plot.c b/remote_plot.c
index 54338aa..e0b7e16 100644
--- a/remote_plot.c
+++ b/remote_plot.c
@@ -178,6 +178,7 @@ typedef struct {
 	PLFLT volt[LEN][VOLTLEN];
 	PLFLT temp[LEN][TEMPLEN];
 	GtkWidget *area;
+	GtkWidget *checkbutton[VOLTLEN+TEMPLEN];
 }DATA;
 
 static gboolean sftp_read_sync(gpointer user_data)
@@ -230,10 +231,18 @@ static gboolean sftp_read_sync(gpointer user_data)
 		//data->buffer[LEN-1]=atof(buffer);
 		// would be better if check strtok return NULL or not
 		strtok(buffer,",");
+		//printf("start print receive\n");
 		for(int i=0;i<VOLTLEN;i++)
+		{
 			data->volt[LEN-1][i]=atof(strtok(NULL,","));
+			//printf("volt[%d][%d]: %g\n",LEN-1,i,data->volt[LEN-1][i]);
+		}
 		for(int i=0;i<TEMPLEN;i++)
+		{
 			data->temp[LEN-1][i]=atof(strtok(NULL,","));
+			//printf("temp[%d][%d]: %g\n",LEN-1,i,data->temp[LEN-1][i]);
+		}
+		//printf("end print receive\n");
 	}
 
 	rc = sftp_close(file);
@@ -355,15 +364,18 @@ static void draw_function (GtkDrawingArea *area,
 {
 	//printf("draw begin\n");
 	DATA *data=user_data;
-
-	PLFLT y[LEN];
 	PLFLT xmin = data->t[0], xmax = data->t[LEN-1], ymin = 0, ymax = 6.;
+	int plot_counts=0;
+	gboolean active_checkbutton[VOLTLEN+TEMPLEN];
 
-	for(int i=0;i<LEN;i++)
-		y[i]=data->volt[i][0];
+	for(int i=0;i<(VOLTLEN+TEMPLEN);i++)
+		if((active_checkbutton[i]=gtk_check_button_get_active(GTK_CHECK_BUTTON(data->checkbutton[i]))))
+			plot_counts++;
 
 	plsdev( "extcairo" );
 
+	//plsetopt("geometry", "600x400");
+
 	// change to white background and black foreground, and gray color palette
 	// http://plplot.org/docbook-manual/plplot-html-5.15.0/color.html
 	// seems should be put before plinit; or need pladv(), plvpor(), plwind() for a new picture?
@@ -374,20 +386,39 @@ static void draw_function (GtkDrawingArea *area,
 	plspal1("cmap1_gray.pal", 1);
 
 	// Initialize plplot
-	plinit();
+	plstar(1,plot_counts);
 	pl_cmd( PLESC_DEVINIT, cr );
 
-	// Create a labelled box to hold the plot.
-	plenv(xmin, xmax, ymin, ymax, 0, 0);
-	pllab("Time (s)","Voltage (V)","Time vs. Voltage");
-	// Plot the data that was prepared above.
-	// plstring for scatter
-	// #(NNN) is Hershey font code, more see example 5, 6, 21
-	// #(727) is centred X symbol; other maybe useful codes: #(728)
-	// hershey font code see http://plplot.org/examples.php?demo=07 ?
-	plstring(LEN, data->t, y, "#(727)");
-	// pline for line
-	plline(LEN, data->t, y);
+	for(int i=0;i<(VOLTLEN+TEMPLEN);i++)
+	{
+		if(active_checkbutton[i])
+		{
+			PLFLT y[LEN];
+
+			for(int j=0;j<LEN;j++)
+			{
+				if(i<VOLTLEN)
+					y[j]=data->volt[j][i];
+				else
+					y[j]=data->temp[j][i-VOLTLEN];
+			}
+
+			// Create a labelled box to hold the plot.
+			plenv(xmin, xmax, ymin, ymax, 0, 0);
+			if(i<VOLTLEN)
+				pllab("Time (s)","Voltage (V)",checkbutton_names[i]);
+			else
+				pllab("Time (s)","Temperature (C)",checkbutton_names[i]);
+			// Plot the data that was prepared above.
+			// plstring for scatter
+			// #(NNN) is Hershey font code, more see example 5, 6, 21
+			// #(727) is centred X symbol; other maybe useful codes: #(728)
+			// hershey font code see http://plplot.org/examples.php?demo=07 ?
+			plstring(LEN, data->t, y, "#(727)");
+			// pline for line
+			plline(LEN, data->t, y);
+		}
+	}
 
 	// Close PLplot library
 	plend();
@@ -414,11 +445,12 @@ static void activate (GtkApplication *app, gpointer user_data)
 	data->area = gtk_drawing_area_new ();
 	GtkWidget *button;
 	GtkWidget *box = gtk_box_new(GTK_ORIENTATION_VERTICAL,1);
-	GtkWidget *checkbutton[VOLTLEN+TEMPLEN];
 	GtkWidget *scrolled_window;
 
 	for(int i=0;i<(VOLTLEN+TEMPLEN);i++)
-		checkbutton[i]=gtk_check_button_new_with_label(checkbutton_names[i]);
+		data->checkbutton[i]=gtk_check_button_new_with_label(checkbutton_names[i]);
+	gtk_check_button_set_active(GTK_CHECK_BUTTON(data->checkbutton[0]),TRUE);
+	gtk_check_button_set_active(GTK_CHECK_BUTTON(data->checkbutton[VOLTLEN]),TRUE);
 
 	window = gtk_application_window_new (app);
 	gtk_window_set_title (GTK_WINDOW (window), "remote_plot");
@@ -443,7 +475,7 @@ static void activate (GtkApplication *app, gpointer user_data)
 	gtk_box_append(GTK_BOX(box), button);
 	gtk_box_append(GTK_BOX(box), data->area);
 	for(int i=0;i<(VOLTLEN+TEMPLEN);i++)
-		gtk_box_append(GTK_BOX(box), checkbutton[i]);
+		gtk_box_append(GTK_BOX(box), data->checkbutton[i]);
 	gtk_window_set_child (GTK_WINDOW (window), scrolled_window);
 
 	gtk_window_present (GTK_WINDOW (window));
-- 
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