--- /dev/null
+/*
+ Copyright (C) 2011-2014 Paul Davis
+ Author: Carl Hetherington <cth@carlh.net>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include <algorithm>
+
+#include "canvas/box.h"
+#include "canvas/rectangle.h"
+
+using namespace ArdourCanvas;
+
+Box::Box (Canvas* canvas, Orientation o)
+ : Item (canvas)
+ , orientation (o)
+ , spacing (0)
+ , top_padding (0), right_padding (0), bottom_padding (0), left_padding (0)
+ , top_margin (0), right_margin (0), bottom_margin (0), left_margin (0)
+ , homogenous (false)
+{
+ self = new Rectangle (this);
+ self->set_outline (false);
+ self->set_fill (false);
+}
+
+Box::Box (Item* parent, Orientation o)
+ : Item (parent)
+ , orientation (o)
+ , spacing (0)
+ , top_padding (0), right_padding (0), bottom_padding (0), left_padding (0)
+ , top_margin (0), right_margin (0), bottom_margin (0), left_margin (0)
+{
+ self = new Rectangle (this);
+ self->set_outline (false);
+ self->set_fill (false);
+}
+
+
+Box::Box (Item* parent, Duple const & p, Orientation o)
+ : Item (parent, p)
+ , orientation (o)
+ , spacing (0)
+ , top_padding (0), right_padding (0), bottom_padding (0), left_padding (0)
+ , top_margin (0), right_margin (0), bottom_margin (0), left_margin (0)
+{
+ self = new Rectangle (this);
+ self->set_outline (false);
+ self->set_fill (false);
+}
+
+void
+Box::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
+{
+ Item::render_children (area, context);
+}
+
+void
+Box::compute_bounding_box () const
+{
+ _bounding_box = boost::none;
+
+ if (_items.empty()) {
+ _bounding_box_dirty = false;
+ return;
+ }
+
+ add_child_bounding_boxes (!collapse_on_hide);
+
+ if (_bounding_box) {
+ Rect r = _bounding_box.get();
+
+ _bounding_box = r.expand (top_padding + outline_width() + top_margin,
+ right_padding + outline_width() + right_margin,
+ bottom_padding + outline_width() + bottom_margin,
+ left_padding + outline_width() + left_margin);
+ }
+
+ _bounding_box_dirty = false;
+}
+
+void
+Box::set_spacing (double s)
+{
+ spacing = s;
+}
+
+void
+Box::set_padding (double t, double r, double b, double l)
+{
+ double last = t;
+
+ top_padding = t;
+
+ if (r >= 0) {
+ last = r;
+ }
+ right_padding = last;
+ if (b >= 0) {
+ last = b;
+ }
+ bottom_padding = last;
+ if (l >= 0) {
+ last = l;
+ }
+ left_padding = last;
+}
+
+void
+Box::set_margin (double t, double r, double b, double l)
+{
+ double last = t;
+ top_margin = t;
+ if (r >= 0) {
+ last = r;
+ }
+ right_margin = last;
+ if (b >= 0) {
+ last = b;
+ }
+ bottom_margin = last;
+ if (l >= 0) {
+ last = l;
+ }
+ left_margin = last;
+}
+
+void
+Box::reset_self ()
+{
+ if (_bounding_box_dirty) {
+ compute_bounding_box ();
+ }
+
+ if (!_bounding_box) {
+ self->hide ();
+ return;
+ }
+
+ Rect r (_bounding_box.get());
+
+ /* XXX need to shrink by margin */
+
+ self->set (r);
+}
+
+void
+Box::reposition_children ()
+{
+ Duple previous_edge (0, 0);
+ Distance largest_width = 0;
+ Distance largest_height = 0;
+
+ if (homogenous) {
+
+ for (std::list<Item*>::iterator i = _items.begin(); ++i != _items.end(); ++i) {
+ boost::optional<Rect> bb = (*i)->bounding_box();
+ if (bb) {
+ largest_height = std::max (largest_height, bb.get().height());
+ largest_width = std::max (largest_height, bb.get().width());
+ }
+ }
+ }
+
+ for (std::list<Item*>::iterator i = _items.begin(); ++i != _items.end(); ++i) {
+
+ (*i)->set_position (previous_edge);
+
+ if (orientation == Vertical) {
+
+ Distance shift = 0;
+
+ if (homogenous) {
+ shift = largest_height;
+ } else {
+ boost::optional<Rect> bb = (*i)->bounding_box();
+
+ if (!(*i)->visible()) {
+ /* invisible child */
+ if (!collapse_on_hide) {
+ /* still add in its size */
+ if (bb) {
+ shift += bb.get().height();
+ }
+ }
+ } else {
+ if (bb) {
+ shift += bb.get().height();
+ }
+ }
+ }
+
+ previous_edge = previous_edge.translate (Duple (0, spacing + shift));
+ } else {
+
+ Distance shift = 0;
+
+ if (homogenous) {
+ shift = largest_width;
+ } else {
+ boost::optional<Rect> bb = (*i)->bounding_box();
+
+ if (!(*i)->visible()) {
+ if (!collapse_on_hide) {
+ if (bb) {
+ shift += bb.get().width();
+ }
+ }
+ } else {
+ if (bb) {
+ shift += bb.get().width();
+ }
+ }
+ }
+
+ previous_edge = previous_edge.translate (Duple (0, spacing + shift));
+ }
+ }
+
+ _bounding_box_dirty = true;
+ reset_self ();
+}
+
+void
+Box::pack_end (Item* i, double extra_padding)
+{
+ if (!i) {
+ return;
+ }
+
+ /* prepend new child */
+ Item::add_front (i);
+ reposition_children ();
+}
+void
+Box::pack_start (Item* i, double extra_padding)
+{
+ if (!i) {
+ return;
+ }
+
+ /* append new child */
+ Item::add (i);
+ reposition_children ();
+}
+
+void
+Box::add (Item* i)
+{
+ pack_start (i);
+}
+
+void
+Box::child_changed ()
+{
+ /* catch visibility and size changes */
+
+ Item::child_changed ();
+ reposition_children ();
+}
+
+void
+Box::set_collapse_on_hide (bool yn)
+{
+ if (collapse_on_hide != yn) {
+ collapse_on_hide = yn;
+ reposition_children ();
+ }
+}
+
+/*----*/
+
+VBox::VBox (Canvas* c)
+ : Box (c, Vertical)
+{
+}
+VBox::VBox (Item* i)
+ : Box (i, Vertical)
+{
+}
+VBox::VBox (Item* i, Duple const & position)
+ : Box (i, position, Vertical)
+{
+}
+
+HBox::HBox (Canvas* c)
+ : Box (c, Horizontal)
+{
+}
+HBox::HBox (Item* i)
+ : Box (i, Horizontal)
+{
+}
+HBox::HBox (Item* i, Duple const & position)
+ : Box (i, position, Horizontal)
+{
+}
--- /dev/null
+/*
+ Copyright (C) 2011-2014 Paul Davis
+ Original Author: Carl Hetherington <cth@carlh.net>
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef __CANVAS_BOX_H__
+#define __CANVAS_BOX_H__
+
+#include "canvas/item.h"
+
+namespace ArdourCanvas
+{
+
+class Rectangle;
+
+/** a Container is an item which has no content of its own
+ * but renders its children in some geometrical arrangement.
+ *
+ * Imagined examples of containers:
+ *
+ * Container: renders each child at the child's self-determined position
+ * Box: renders each child along an axis (vertical or horizontal)
+ * Table/Grid: renders each child within a two-dimensional grid
+ *
+ * Other?
+ */
+class LIBCANVAS_API Box : public Item
+{
+public:
+ enum Orientation {
+ Vertical,
+ Horizontal
+ };
+
+ Box (Canvas *, Orientation);
+ Box (Item *, Orientation);
+ Box (Item *, Duple const & position, Orientation);
+
+ void set_spacing (double s);
+ void set_padding (double top, double right = -1.0, double bottom = -1.0, double left = -1.0);
+ void set_margin (double top, double right = -1.0, double bottom = -1.0, double left = -1.0);
+
+ /* aliases so that CSS box model terms work */
+ void set_border_width (double w) { set_outline_width (w); }
+ void set_border_color (Color c) { set_outline_color (c); }
+
+ void add (Item*);
+ void pack_start (Item*, double extra_padding = 0);
+ void pack_end (Item*, double extra_padding = 0);
+
+ void set_collapse_on_hide (bool);
+ void set_homogenous (bool);
+
+ void compute_bounding_box () const;
+ void render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const;
+
+ protected:
+ Orientation orientation;
+ double spacing;
+ double top_padding, right_padding, bottom_padding, left_padding;
+ double top_margin, right_margin, bottom_margin, left_margin;
+
+ void child_changed ();
+ private:
+ Rectangle *self;
+ bool collapse_on_hide;
+ bool homogenous;
+
+ void reset_self ();
+ void reposition_children ();
+};
+
+class LIBCANVAS_API VBox : public Box
+{
+ public:
+ VBox (Canvas *);
+ VBox (Item *);
+ VBox (Item *, Duple const & position);
+};
+
+class LIBCANVAS_API HBox : public Box
+{
+ public:
+ HBox (Canvas *);
+ HBox (Item *);
+ HBox (Item *, Duple const & position);
+};
+
+}
+
+#endif
projects / ardour.git / commitdiff