Canvas: tweak debug output for canvas rendering

libs/canvas/constraint_test2.cc

@@ -0,0 +1,181 @@
+#include <iostream>
+
+#include <gtkmm/adjustment.h>
+#include <gtkmm/main.h>
+#include <gtkmm/window.h>
+
+#include "pbd/compose.h"
+
+#include "gtkmm2ext/colors.h"
+
+#include "canvas/box.h"
+#include "canvas/canvas.h"
+#include "canvas/cbox.h"
+#include "canvas/circle.h"
+#include "canvas/constrained_item.h"
+#include "canvas/constraint_packer.h"
+#include "canvas/rectangle.h"
+#include "canvas/text.h"
+
+using namespace ArdourCanvas;
+using namespace Gtk;
+using std::cerr;
+using std::endl;
+
+#define SQUARED 16
+
+ struct Column {
+	Column (Canvas* c, uint32_t num) : number (num) {
+		box = new cBox (c, Vertical);
+		box->name = string_compose ("col%1", num);
+		box->set_spacing (12);
+
+		Pango::FontDescription font ("Sans");
+
+		for (int i = 0; i < SQUARED; ++i) {
+			rects[i] = new Rectangle (c);
+			rects[i]->name = string_compose ("r%1-%2", number, i);
+			rects[i]->set_intrinsic_size (8, 12);
+			rects[i]->set_outline_color (0xff0000ff);
+			rects[i]->set_fill_color (Gtkmm2ext::random_color());
+
+			BoxConstrainedItem* b = box->pack_start (rects[i], PackOptions (PackExpand|PackFill));
+
+			labels[i] = new Text (c);
+			labels[i]->name = string_compose ("t%1-%2", number, i);
+			labels[i]->set_font_description (font);
+			labels[i]->set (labels[i]->name);
+			labels[i]->set_fill_color (0x000000ff);
+
+			ConstrainedItem* l = box->add_constrained (labels[i]);
+
+			/* Note: the use of labels[i].width() here is
+			 * equivalent to using a constant. This is not the same
+			 * as l->width(), which is a constraint-solved
+			 * variable. labels[i].width() is the pixel width of
+			 * the current text contents of labels[i].
+			 */
+
+			l->add_constraint (l->left() == b->center_x() - (labels[i]->width() / 2.));
+			l->add_constraint (l->width() == labels[i]->width());
+			l->add_constraint (l->right() == l->left() + labels[i]->width());
+
+			l->add_constraint (l->top() == b->center_y() - (labels[i]->height() / 2));
+			l->add_constraint (l->height() == labels[i]->height());
+			l->add_constraint (l->bottom() == l->top() + l->height());
+		}
+	}
+
+	cBox* box;
+	Rectangle* rects[SQUARED];
+	Text* labels[SQUARED];
+	uint32_t number;
+};
+
+int
+main (int argc, char* argv[])
+{
+	Gtk::Main app (&argc, &argv);
+
+	Gtk::Window win;
+	Gtk::Adjustment hadj (0, 0, 1000, 1, 10);
+	Gtk::Adjustment vadj (0, 0, 1000, 1, 10);
+	GtkCanvasViewport cview (hadj, vadj);
+	Canvas* c = cview.canvas ();
+
+	c->set_background_color (0xffffffff);
+
+	srandom (time ((time_t) 0));
+
+	// cview.set_size_request (100, 100);
+
+	win.add (cview);
+
+	cBox* main_hbox = new cBox (c->root(), Horizontal);
+	main_hbox->name = "main";
+	main_hbox->set_spacing (12);
+	main_hbox->set_margin (24);
+
+	Column* cols[SQUARED];
+
+	for (size_t i = 0; i < SQUARED; ++i) {
+		cols[i] = new Column (c, i);
+		main_hbox->pack_start (cols[i]->box, PackOptions (PackExpand|PackFill));
+	}
+
+
+#if 0
+	Circle* circle = new Circle (c);
+	circle->name = "circle";
+	//circle->set_radius (30);
+	circle->set_fill_color (Gtkmm2ext::random_color());
+	circle->set_outline_color (Gtkmm2ext::random_color());
+
+	ci = vbox->pack_start (circle, PackOptions (PackExpand|PackFill));
+	ci->add_constraint (ci->height() == 0.5 * hb1->height());
+
+	cBox* hbox2 = new cBox (c, Horizontal);
+	hbox2->name = "hbox2";
+	hbox2->set_fill (true);
+	hbox2->set_fill_color (Gtkmm2ext::random_color());
+
+	Text* txt = new Text (c);
+	txt->name = "text";
+
+	Pango::FontDescription font ("Sans");
+
+	txt->set_font_description (font);
+	txt->set ("hello, world");
+
+	ConstrainedItem* ti = hbox2->pack_start (txt, PackExpand);
+	ti->add_constraint (ti->left() == 25);
+
+	vbox->pack_start (hbox2, PackOptions (PackExpand|PackFill));
+#endif
+
+
+	win.show_all ();
+	app.run ();
+
+	return 0;
+}
+
+
+
+#if 0
+/* code test arbitrary constraint layout */
+
+	ConstraintPacker* packer = new ConstraintPacker (c->root());
+
+	ConstrainedItem* left = packer->add_constrained (r1);
+	ConstrainedItem* right = packer->add_constrained (r2);
+	ConstrainedItem* center = packer->add_constrained (r3);
+
+	/* x-axis */
+
+	packer->constrain (left->left() == 0);
+	packer->constrain (center->left() == left->right());
+	packer->constrain (right->left() == center->right());
+
+	packer->constrain (left->width() == packer->width * 0.4);
+	packer->constrain (center->width() == packer->width * 0.1);
+	packer->constrain (left->width() + right->width() + center->width() == packer->width);
+
+	packer->constrain (left->right() == left->left() + left->width());
+	packer->constrain (right->right() == right->left() + right->width());
+	packer->constrain (center->right() == center->left() + center->width());
+
+	/* y-axis */
+
+	packer->constrain (left->top() == 0);
+	packer->constrain (right->top() == left->top());
+	packer->constrain (center->top() == left->top());
+
+	packer->constrain (left->height() == packer->height);
+	packer->constrain (right->height() == left->height());
+	packer->constrain (center->height() == left->height());
+
+	packer->constrain (left->bottom() == left->top() + left->height());
+	packer->constrain (center->bottom() == center->top() + center->height());
+	packer->constrain (right->bottom() == right->top() + right->height());
+#endif

libs/canvas/item.cc

@@ -759,8 +759,8 @@ Item::render_children (Rect const & area, Cairo::RefPtr<Cairo::Context> context)
 
 #ifdef CANVAS_DEBUG
 	if (DEBUG_ENABLED(PBD::DEBUG::CanvasRender)) {
-		cerr << string_compose ("%1%7 %2 @ %7 render %5 @ %6 %3 items out of %4\n",
+		cerr << string_compose ("%1%8 %2 @ %7 render %5 @ %6 %3 items out of %4\n",
-					_canvas->render_indent(), (name.empty() ? string ("[unnamed]") : name), items.size(), _items.size(), area, _position, this,
+		                        _canvas->render_indent(), (name.empty() ? string ("[unnamed]") : name), items.size(), _items.size(), area, _position, 0 /* this */,
 		                        whatami());
 	}
 #endif
@@ -804,6 +804,7 @@ Item::render_children (Rect const & area, Cairo::RefPtr<Cairo::Context> context)
 						     << ' '
 						     << (*i)->whatami()
 						     << ' '
+
 						     << (*i)->name
 						     << " item "
 						     << item_bbox