Start fleshing out the dive printing a bit more

Four dives per page sounds good.  Maybe even six? But dangit, the
default font choice for cairo printing sucks.  And I need to learn about
pango for actually printing the dive info.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org

1 files changed, 38 insertions, 9 deletions

diff --git a/print.c b/print.c
index af7fc4cd6..a16ddb76b 100644
--- a/print.c
+++ b/print.c
@@ -4,27 +4,54 @@
 #include "display.h"
 #include "display-gtk.h"
 
+static void show_one_dive(struct dive *dive, cairo_t *cr, double w, double h)
+{
+	struct graphics_context gc = {
+		.printer = 1,
+		.cr = cr
+	};
+	plot(&gc, w, h, dive);
+}
+
+static void print(int divenr, cairo_t *cr, double x, double y, double w, double h)
+{
+	struct dive *dive;
+
+	dive = get_dive(divenr);
+	if (!dive)
+		return;
+	cairo_save(cr);
+	cairo_translate(cr, x, y);
+
+	/* Dive plot in the upper half */
+	show_one_dive(dive, cr, w, h/2);
+
+	/* Dive information in the lower half */
+
+	cairo_restore(cr);
+}
+
 static void draw_page(GtkPrintOperation *operation,
 			GtkPrintContext *context,
 			gint page_nr,
 			gpointer user_data)
 {
+	int nr;
 	cairo_t *cr;
 	PangoLayout *layout;
 	double w, h;
-	struct graphics_context gc = { .printer = 1 };
 
 	cr = gtk_print_context_get_cairo_context(context);
-	gc.cr = cr;
-
 	layout=gtk_print_context_create_pango_layout(context);
 
-	w = gtk_print_context_get_width(context);
-	h = gtk_print_context_get_height(context);
+	w = gtk_print_context_get_width(context) / 2;
+	h = gtk_print_context_get_height(context) / 2;
 
-	/* Do the profile on the top half of the page.. */
-	if (current_dive)
-		plot(&gc, w, h/2, current_dive);
+	nr = page_nr*4;
+	print(nr+0, cr, 0, 0, w, h);
+	print(nr+1, cr, w, 0, w, h);
+	print(nr+2, cr, 0, h, w, h);
+	print(nr+3, cr, w, h, w, h);
 
 	pango_cairo_show_layout(cr,layout);
 	g_object_unref(layout);
@@ -38,13 +65,15 @@ static GtkPrintSettings *settings = NULL;
 
 void do_print(void)
 {
+	int pages;
 	GtkPrintOperation *print;
 	GtkPrintOperationResult res;
 
 	print = gtk_print_operation_new();
 	if (settings != NULL)
 		gtk_print_operation_set_print_settings(print, settings);
-	gtk_print_operation_set_n_pages(print, 1);
+	pages = (dive_table.nr + 3) / 4;
+	gtk_print_operation_set_n_pages(print, pages);
 	g_signal_connect(print, "begin_print", G_CALLBACK(begin_print), NULL);
 	g_signal_connect(print, "draw_page", G_CALLBACK(draw_page), NULL);
 	res = gtk_print_operation_run(print, GTK_PRINT_OPERATION_ACTION_PRINT_DIALOG,