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livetrax/libs/canvas/constraint_test2.cc

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#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/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 ConstraintPacker (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->centered_on (*b);
l->add_constraint (l->width() == labels[i]->width());
l->add_constraint (l->height() == labels[i]->height());
#if 0
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());
#endif
}
}
ConstraintPacker* 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);
ConstraintPacker* main_hbox = new ConstraintPacker (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());
ConstraintPacker* hbox2 = new ConstraintPacker (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