Port the plot text method to Qt, also test it by actually plotting something

The plot_text function from the cairo-methods are now ported
on the qt version. this patch moves around some code since
quite defines are already used and I didn't want to reinvent
the whell.

Original code used varargs, but I prefered to change it
, so now it receives just a reference to a QString object
and the string must be constructed before sending,
using the .arg methods.

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

display-gtk.h

@@ -90,22 +90,6 @@ typedef gint (*sort_func_t)(GtkTreeModel *model,
 			    GtkTreeIter *b,
 			    gpointer user_data);
 
-#define ALIGN_LEFT 1
-#define ALIGN_RIGHT 2
-#define INVISIBLE 4
-#define UNSORTABLE 8
-#define EDITABLE 16
-
-#ifndef TEXT_SCALE
-#define TEXT_SCALE 1.0
-#endif
-
-#define DEPTH_TEXT_SIZE (10 * TEXT_SCALE)
-#define PRESSURE_TEXT_SIZE (10 * TEXT_SCALE)
-#define DC_TEXT_SIZE (10.5 * TEXT_SCALE)
-#define PP_TEXT_SIZE (11 * TEXT_SCALE)
-#define TEMP_TEXT_SIZE (12 * TEXT_SCALE)
-
 extern GtkTreeViewColumn *tree_view_column(GtkWidget *tree_view, int index, const char *title,
 		data_func_t data_func, unsigned int flags);
 extern GtkTreeViewColumn *tree_view_column_add_pixbuf(GtkWidget *tree_view, data_func_t data_func, GtkTreeViewColumn *col);

profile.c

@@ -157,57 +157,6 @@ int get_maxdepth(struct plot_info *pi)
 	return md;
 }
 
-#if 0
-typedef struct {
-	double size;
-	color_indice_t color;
-	double hpos, vpos;
-} text_render_options_t;
-#endif
-
-#define RIGHT (-1.0)
-#define CENTER (-0.5)
-#define LEFT (0.0)
-
-#define TOP (1)
-#define MIDDLE (0)
-#define BOTTOM (-1)
-
-#if USE_GTK_UI
-static void plot_text(struct graphics_context *gc, const text_render_options_t *tro,
-		      double x, double y, const char *fmt, ...)
-{
-	cairo_t *cr = gc->cr;
-	cairo_font_extents_t fe;
-	cairo_text_extents_t extents;
-	double dx, dy;
-	char buffer[256];
-	va_list args;
-
-	va_start(args, fmt);
-	vsnprintf(buffer, sizeof(buffer), fmt, args);
-	va_end(args);
-
-	cairo_set_font_size(cr, tro->size * plot_scale);
-	cairo_font_extents(cr, &fe);
-	cairo_text_extents(cr, buffer, &extents);
-	dx = tro->hpos * (extents.width + extents.x_bearing);
-	dy = tro->vpos * (extents.height + fe.descent);
-	move_to(gc, x, y);
-	cairo_rel_move_to(cr, dx, dy);
-
-	cairo_text_path(cr, buffer);
-	set_source_rgba(gc, TEXT_BACKGROUND);
-	cairo_stroke(cr);
-
-	move_to(gc, x, y);
-	cairo_rel_move_to(cr, dx, dy);
-
-	set_source_rgba(gc, tro->color);
-	cairo_show_text(cr, buffer);
-}
-#endif /* USE_GTK_UI */
-
 /* collect all event names and whether we display them */
 struct ev_select {
 	char *ev_name;

profile.h

@@ -54,6 +54,30 @@ int get_maxtime(struct plot_info *pi);
  * partial pressure graphs */
 int get_maxdepth(struct plot_info *pi);
 
+#define ALIGN_LEFT 1
+#define ALIGN_RIGHT 2
+#define INVISIBLE 4
+#define UNSORTABLE 8
+#define EDITABLE 16
+
+#ifndef TEXT_SCALE
+#define TEXT_SCALE 1.0
+#endif
+
+#define DEPTH_TEXT_SIZE (10 * TEXT_SCALE)
+#define PRESSURE_TEXT_SIZE (10 * TEXT_SCALE)
+#define DC_TEXT_SIZE (10.5 * TEXT_SCALE)
+#define PP_TEXT_SIZE (11 * TEXT_SCALE)
+#define TEMP_TEXT_SIZE (12 * TEXT_SCALE)
+
+#define RIGHT (-1.0)
+#define CENTER (-0.5)
+#define LEFT (0.0)
+
+#define TOP (1)
+#define MIDDLE (0)
+#define BOTTOM (-1)
+
 #ifdef __cplusplus
 }
 #endif

qt-ui/profilegraphics.cpp

@@ -100,6 +100,12 @@ void fill_profile_color()
 }
 #undef COLOR
 
+struct text_render_options{
+	double size;
+	color_indice_t color;
+	double hpos, vpos;
+};
+
 ProfileGraphicsView::ProfileGraphicsView(QWidget* parent) : QGraphicsView(parent)
 {
 	setScene(new QGraphicsScene());
@@ -293,19 +299,17 @@ void ProfileGraphicsView::plot_depth_profile(struct graphics_context *gc, struct
 		scene()->addItem(line);
 	}
 
-#if 0
 	/* now the text on the time markers */
-	text_render_options_t tro = {DEPTH_TEXT_SIZE, TIME_TEXT, CENTER, TOP};
+	struct text_render_options tro = {DEPTH_TEXT_SIZE, TIME_TEXT, CENTER, TOP};
 	if (maxtime < 600) {
 		/* Be a bit more verbose with shorter dives */
 		for (i = incr; i < maxtime; i += incr)
-			plot_text(gc, &tro, i, 1, "%02d:%02d", i/60, i%60);
+			plot_text(gc, &tro, i, 1, QString("%1:%2").arg(i/60).arg(i%60));
 	} else {
 		/* Only render the time on every second marker for normal dives */
 		for (i = incr; i < maxtime; i += 2 * incr)
-			plot_text(gc, &tro, i, 1, "%d", i/60);
+			plot_text(gc, &tro, i, 1, QString::number(i/60));
 	}
-#endif
 
 	/* Depth markers: every 30 ft or 10 m*/
 	gc->leftx = 0; gc->rightx = 1.0;
@@ -418,9 +422,6 @@ void ProfileGraphicsView::plot_depth_profile(struct graphics_context *gc, struct
 	// TODO: Port the profile_calc_ceiling to QSettings
 	// if (prefs.profile_calc_ceiling) {
 
-		qDebug() << "CALC_CEILING_SHALLOW" << profile_color[CALC_CEILING_SHALLOW].first();
-		qDebug() << "CALC_CEILING_DEEP" << profile_color[CALC_CEILING_DEEP].first();
-
 		pat.setColorAt(0, profile_color[CALC_CEILING_SHALLOW].first());
 		pat.setColorAt(1, profile_color[CALC_CEILING_DEEP].first());
 
@@ -479,6 +480,23 @@ void ProfileGraphicsView::plot_depth_profile(struct graphics_context *gc, struct
 	}
 }
 
+void ProfileGraphicsView::plot_text(struct graphics_context *gc, text_render_options_t *tro, double x, double y, const QString& text)
+{
+	QFontMetrics fm(font());
+
+	double dx = tro->hpos * (fm.width(text));
+	double dy = tro->vpos * (fm.height());
+
+	QGraphicsSimpleTextItem *item = new QGraphicsSimpleTextItem(text);
+	QPointF point( SCALE(gc, x, y) ); // This is neded because of the SCALE macro.
+
+	item->setPos(point.x() + dx, point.y() +dy );
+	item->setBrush( QBrush(profile_color[tro->color].first()));
+	item->setPen( QPen(profile_color[BACKGROUND].first()));
+	scene()->addItem(item);
+	qDebug() << item->pos();
+}
+
 
 void ProfileGraphicsView::resizeEvent(QResizeEvent *event)
 {
@@ -486,5 +504,5 @@ void ProfileGraphicsView::resizeEvent(QResizeEvent *event)
 	// I can pass some parameters to this -
 	// like Qt::IgnoreAspectRatio or Qt::KeepAspectRatio
 	QRectF r = scene()->sceneRect();
-	fitInView ( r.x() - 2, r.y() -2, r.width() + 4, r.height() + 4); // do a little bit of spacing;
+	fitInView ( r.x() - 50, r.y() -50, r.width() + 100, r.height() + 100); // do a little bit of spacing;
 }

qt-ui/profilegraphics.h

@@ -3,6 +3,11 @@
 
 #include <QGraphicsView>
 
+struct text_render_options;
+struct graphics_context;
+struct plot_info;
+typedef struct text_render_options text_render_options_t;
+
 class ProfileGraphicsView : public QGraphicsView {
 Q_OBJECT
 public:
@@ -14,6 +19,7 @@ protected:
 
 private:
 	void plot_depth_profile(struct graphics_context *gc, struct plot_info *pi);
+	void plot_text(struct graphics_context *gc, text_render_options_t *tro, double x, double y, const QString &text);
 
 	QPen defaultPen;
 	QBrush defaultBrush;