Changed settings dialog api to use database units. Implement render output size preview

glade/dialog.glade

@@ -113,7 +113,7 @@
         <property name="can_focus">False</property>
       </object>
       <packing>
-        <property name="expand">False</property>
+        <property name="expand">True</property>
         <property name="fill">True</property>
         <property name="position">6</property>
       </packing>
@@ -151,5 +151,38 @@
         <property name="position">7</property>
       </packing>
     </child>
+    <child>
+      <object class="GtkBox">
+        <property name="visible">True</property>
+        <property name="can_focus">False</property>
+        <child>
+          <object class="GtkLabel" id="x-output-label">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+          </object>
+          <packing>
+            <property name="expand">True</property>
+            <property name="fill">True</property>
+            <property name="position">0</property>
+          </packing>
+        </child>
+        <child>
+          <object class="GtkLabel" id="y-output-label">
+            <property name="visible">True</property>
+            <property name="can_focus">False</property>
+          </object>
+          <packing>
+            <property name="expand">True</property>
+            <property name="fill">True</property>
+            <property name="position">1</property>
+          </packing>
+        </child>
+      </object>
+      <packing>
+        <property name="expand">False</property>
+        <property name="fill">True</property>
+        <property name="position">8</property>
+      </packing>
+    </child>
   </object>
 </interface>

main-window.c

@@ -250,13 +250,14 @@ static void on_convert_clicked(gpointer button, gpointer user)
 	bounding_box_prepare_empty(&cell_box);
 	calculate_cell_bounding_box(&cell_box, cell_to_render);
 
-	/* Calculate size in meters */
-	height = (cell_box.vectors.upper_right.y - cell_box.vectors.lower_left.y) * cell_to_render->parent_library->unit_in_meters;
-	width = (cell_box.vectors.upper_right.x - cell_box.vectors.lower_left.x) * cell_to_render->parent_library->unit_in_meters;
+	/* Calculate size in meters database units */
+	height = (cell_box.vectors.upper_right.y - cell_box.vectors.lower_left.y);
+	width = (cell_box.vectors.upper_right.x - cell_box.vectors.lower_left.x);
 
 	/* Show settings dialog */
 	settings = renderer_settings_dialog_new(GTK_WINDOW(data->main_window));
 	renderer_settings_dialog_set_settings(settings, &sett);
+	renderer_settings_dialog_set_database_unit_scale(settings, cell_to_render->parent_library->unit_in_meters);
 	renderer_settings_dialog_set_cell_height(settings, height);
 	renderer_settings_dialog_set_cell_width(settings, width);
 

trigonometric/bounding-box.c

@@ -165,11 +165,10 @@ void bounding_box_update_point(union bounding_box *destination, conv_generic_to_
 {
 	struct vector_2d point;
 
-	if (!destination || !pt) {
+	if (!destination || !pt)
 		return;
-	}
 
-	if (!conv_func)
+	if (conv_func)
 		conv_func(pt, &point);
 	else
 		(void)vector_2d_copy(&point, (struct vector_2d *)pt);

widgets/conv-settings-dialog.c

@@ -43,8 +43,12 @@ struct  _RendererSettingsDialog {
 		GtkLabel *x_label;
 		GtkLabel *y_label;
 
-		double cell_height;
-		double cell_width;
+		GtkLabel *x_output_label;
+		GtkLabel *y_output_label;
+
+		unsigned int cell_height;
+		unsigned int cell_width;
+		double unit_in_meters;
 };
 
 G_DEFINE_TYPE(RendererSettingsDialog, renderer_settings_dialog, GTK_TYPE_DIALOG)
@@ -110,13 +114,13 @@ static gboolean shape_drawer_drawing_callback(GtkWidget *widget, cairo_t *cr, gp
 	usable_width = (0.95*(double)width) - 15.0;
 	usable_height = (0.95*(double)height) - 15.0;
 
-	width_scale = usable_width/dialog->cell_width;
-	height_scale = usable_height/dialog->cell_height;
+	width_scale = usable_width/(double)dialog->cell_width;
+	height_scale = usable_height/(double)dialog->cell_height;
 
 	final_scale_value = (width_scale < height_scale ? width_scale : height_scale);
 
-	cairo_rectangle(cr, -dialog->cell_width*final_scale_value/2, -dialog->cell_height*final_scale_value/2,
-				dialog->cell_width*final_scale_value, dialog->cell_height*final_scale_value);
+	cairo_rectangle(cr, -(double)dialog->cell_width*final_scale_value/2.0, -(double)dialog->cell_height*final_scale_value/2.0,
+			(double)dialog->cell_width*final_scale_value, (double)dialog->cell_height*final_scale_value);
 	cairo_stroke(cr);
 	cairo_restore(cr);
 
@@ -126,11 +130,31 @@ static gboolean shape_drawer_drawing_callback(GtkWidget *widget, cairo_t *cr, gp
 static void renderer_settings_dialog_update_labels(RendererSettingsDialog *self)
 {
 	char default_buff[100];
+	double scale;
 
-	snprintf(default_buff, sizeof(default_buff), "Width: %E", self->cell_width);
+	if (!self)
+		return;
+
+	snprintf(default_buff, sizeof(default_buff), "Width: %E", self->cell_width * self->unit_in_meters);
 	gtk_label_set_text(self->x_label, default_buff);
-	snprintf(default_buff, sizeof(default_buff), "Height: %E", self->cell_height);
+	snprintf(default_buff, sizeof(default_buff), "Height: %E", self->cell_height * self->unit_in_meters);
 	gtk_label_set_text(self->y_label, default_buff);
+
+	scale = gtk_range_get_value(GTK_RANGE(self->scale));
+
+	snprintf(default_buff, sizeof(default_buff), "Output Width: %u px", (unsigned int)((double)self->cell_width / scale));
+	gtk_label_set_text(self->x_output_label, default_buff);
+	snprintf(default_buff, sizeof(default_buff), "Output Height: %u px", (unsigned int)((double)self->cell_height / scale));
+	gtk_label_set_text(self->y_output_label, default_buff);
+}
+
+static void scale_value_changed(GtkRange *range, gpointer user_data)
+{
+	(void)range;
+	RendererSettingsDialog *dialog;
+
+	dialog = RENDERER_SETTINGS_DIALOG(user_data);
+	renderer_settings_dialog_update_labels(dialog);
 }
 
 static void renderer_settings_dialog_init(RendererSettingsDialog *self)
@@ -152,6 +176,8 @@ static void renderer_settings_dialog_init(RendererSettingsDialog *self)
 	self->shape_drawing = GTK_DRAWING_AREA(gtk_builder_get_object(builder, "shape-drawer"));
 	self->x_label = GTK_LABEL(gtk_builder_get_object(builder, "x-label"));
 	self->y_label = GTK_LABEL(gtk_builder_get_object(builder, "y-label"));
+	self->x_output_label = GTK_LABEL(gtk_builder_get_object(builder, "x-output-label"));
+	self->y_output_label = GTK_LABEL(gtk_builder_get_object(builder, "y-output-label"));
 
 	gtk_dialog_add_buttons(dialog, "Cancel", GTK_RESPONSE_CANCEL, "OK", GTK_RESPONSE_OK, NULL);
 	gtk_container_add(GTK_CONTAINER(gtk_dialog_get_content_area(dialog)), box);
@@ -161,9 +187,12 @@ static void renderer_settings_dialog_init(RendererSettingsDialog *self)
 	g_signal_connect(G_OBJECT(self->shape_drawing),
 				"draw", G_CALLBACK(shape_drawer_drawing_callback), (gpointer)self);
 
+	g_signal_connect(self->scale, "value-changed", G_CALLBACK(scale_value_changed), (gpointer)self);
+
 	/* Default values */
-	self->cell_width = 1E-6;
-	self->cell_height = 1E-6;
+	self->cell_width = 1;
+	self->cell_height = 1;
+	self->unit_in_meters = 1E-6;
 	renderer_settings_dialog_update_labels(self);
 
 	g_object_unref(builder);
@@ -228,34 +257,41 @@ void renderer_settings_dialog_set_settings(RendererSettingsDialog *dialog, struc
 	}
 }
 
-void renderer_settings_dialog_set_cell_width(RendererSettingsDialog *dialog, double width)
+void renderer_settings_dialog_set_cell_width(RendererSettingsDialog *dialog, unsigned int width)
 {
 	if (!dialog)
 		return;
 
-	if (width == 0.0)
-		width = 1E-6;
+	if (width == 0)
+		width = 1;
 
-	if (width < 0.0)
-		width = -width;
 
 	dialog->cell_width = width;
 	renderer_settings_dialog_update_labels(dialog);
 }
 
-void renderer_settings_dialog_set_cell_height(RendererSettingsDialog *dialog, double height)
+void renderer_settings_dialog_set_cell_height(RendererSettingsDialog *dialog, unsigned int height)
 {
 	if (!dialog)
 		return;
 
-	if (height == 0.0)
-		height = 1E-6;
-
-	if (height < 0.0)
-		height = -height;
+	if (height == 0)
+		height = 1;
 
 	dialog->cell_height = height;
 	renderer_settings_dialog_update_labels(dialog);
 }
 
+void renderer_settings_dialog_set_database_unit_scale(RendererSettingsDialog *dialog, double unit_in_meters)
+{
+	if (!dialog)
+		return;
+
+	if (unit_in_meters < 0)
+		unit_in_meters *= -1;
+
+	dialog->unit_in_meters = unit_in_meters;
+	renderer_settings_dialog_update_labels(dialog);
+}
+
 /** @} */

widgets/conv-settings-dialog.h

@@ -78,16 +78,23 @@ void renderer_settings_dialog_get_settings(RendererSettingsDialog *dialog, struc
 /**
  * @brief renderer_settings_dialog_set_cell_width Set width for rendered cell
  * @param dialog
- * @param width Width in meters
+ * @param width Width in database units
  */
-void renderer_settings_dialog_set_cell_width(RendererSettingsDialog *dialog, double width);
+void renderer_settings_dialog_set_cell_width(RendererSettingsDialog *dialog, unsigned int width);
 
 /**
  * @brief renderer_settings_dialog_set_cell_height Set height for rendered cell
  * @param dialog
- * @param height Height in meters
+ * @param height Height in database units
  */
-void renderer_settings_dialog_set_cell_height(RendererSettingsDialog *dialog, double height);
+void renderer_settings_dialog_set_cell_height(RendererSettingsDialog *dialog, unsigned int height);
+
+/**
+ * @brief renderer_settings_dialog_set_database_unit_scale Set database scale
+ * @param dialog dialog element
+ * @param unit_in_meters Database unit in meters
+ */
+void renderer_settings_dialog_set_database_unit_scale(RendererSettingsDialog *dialog, double unit_in_meters);
 
 #endif /* __CONV_SETTINGS_DIALOG_H__ */