1 files changed, 210 insertions, 0 deletions
diff --git a/src/gui/BreadCrumbBox.cpp b/src/gui/BreadCrumbBox.cpp
new file mode 100644
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--- /dev/null
+++ b/src/gui/BreadCrumbBox.cpp
@@ -0,0 +1,210 @@
+/* This file is part of Ingen.
+ * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
+ * 
+ * Ingen 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.
+ * 
+ * Ingen 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 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.,
+ * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "BreadCrumbBox.hpp"
+#include "BreadCrumb.hpp"
+#include "App.hpp"
+#include "client/SigClientInterface.hpp"
+namespace Ingen {
+namespace GUI {
+
+
+BreadCrumbBox::BreadCrumbBox()
+	: Gtk::HBox()
+	, _active_path("/")
+	, _full_path("/")
+	, _enable_signal(true)
+{
+	App::instance().client()->signal_object_destroyed.connect(
+			sigc::mem_fun(this, &BreadCrumbBox::object_destroyed));
+}
+
+
+SharedPtr<PatchView>
+BreadCrumbBox::view(const Path& path)
+{
+	for (std::list<BreadCrumb*>::const_iterator i = _breadcrumbs.begin(); i != _breadcrumbs.end(); ++i)
+		if ((*i)->path() == path)
+			return (*i)->view();
+
+	return SharedPtr<PatchView>();
+}
+
+
+/** Sets up the crumbs to display @a path.
+ *
+ * If @a path is already part of the shown path, it will be selected and the 
+ * children preserved.
+ */
+void
+BreadCrumbBox::build(Path path, SharedPtr<PatchView> view)
+{
+	bool old_enable_signal = _enable_signal;
+	_enable_signal = false;
+
+	// Moving to a path we already contain, just switch the active button
+	if (_breadcrumbs.size() > 0 && (path.is_parent_of(_full_path) || path == _full_path)) {
+		
+		for (std::list<BreadCrumb*>::iterator i = _breadcrumbs.begin(); i != _breadcrumbs.end(); ++i) {
+			if ((*i)->path() == path) {
+				(*i)->set_active(true);
+				if (!(*i)->view())
+					(*i)->set_view(view);
+
+				// views are expensive, having two around for the same patch is a bug
+				assert((*i)->view() == view);
+
+			} else {
+				(*i)->set_active(false);
+			}
+		}
+	
+		_active_path = path;
+		_enable_signal = old_enable_signal;
+
+
+	// Moving to a child of the full path, just append crumbs (preserve view cache)
+	} else if (_breadcrumbs.size() > 0 && (path.is_child_of(_full_path))) {
+
+		string suffix = path.substr(_full_path.length());
+		while (suffix.length() > 0) {
+			if (suffix[0] == '/')
+				suffix = suffix.substr(1);
+			const string name = suffix.substr(0, suffix.find("/"));
+			_full_path = _full_path.base() + name;
+			BreadCrumb* but = create_crumb(_full_path, view);
+			pack_start(*but, false, false, 1);
+			_breadcrumbs.push_back(but);
+			but->show();
+			if (suffix.find("/") == string::npos)
+				break;
+			else
+				suffix = suffix.substr(suffix.find("/")+1);
+		}
+		
+		for (std::list<BreadCrumb*>::iterator i = _breadcrumbs.begin(); i != _breadcrumbs.end(); ++i)
+			(*i)->set_active(false);
+		_breadcrumbs.back()->set_active(true);
+
+
+	// Rebuild from scratch
+	// Getting here is bad unless absolutely necessary, since the PatchView cache is lost
+	} else {
+
+		_full_path = path;
+		_active_path = path;
+
+		// Empty existing breadcrumbs
+		for (std::list<BreadCrumb*>::iterator i = _breadcrumbs.begin(); i != _breadcrumbs.end(); ++i)
+			remove(**i);
+		_breadcrumbs.clear();
+
+		// Add root
+		BreadCrumb* root_but = create_crumb("/", view);
+		pack_start(*root_but, false, false, 1);
+		_breadcrumbs.push_front(root_but);
+		root_but->set_active(root_but->path() == _active_path);
+
+		Path working_path = "/";
+		string suffix = path.substr(1);
+		while (suffix.length() > 0) {
+			if (suffix[0] == '/')
+				suffix = suffix.substr(1);
+			const string name = suffix.substr(0, suffix.find("/"));
+			working_path = working_path.base() + name;
+			BreadCrumb* but = create_crumb(working_path, view);
+			pack_start(*but, false, false, 1);
+			_breadcrumbs.push_back(but);
+			but->set_active(working_path == _active_path);
+			but->show();
+			if (suffix.find("/") == string::npos)
+				break;
+			else
+				suffix = suffix.substr(suffix.find("/")+1);
+		}
+	}
+		
+	_enable_signal = old_enable_signal;
+}
+
+
+/** Create a new crumb, assigning it a reference to @a view if their paths
+ * match, otherwise ignoring @a view.
+ */
+BreadCrumb*
+BreadCrumbBox::create_crumb(const Path&           path,
+                            SharedPtr<PatchView> view)
+{
+	BreadCrumb* but = manage(new BreadCrumb(path,
+			(view && path == view->patch()->path()) ? view : SharedPtr<PatchView>()));
+	
+	but->signal_toggled().connect(sigc::bind(sigc::mem_fun(
+				this, &BreadCrumbBox::breadcrumb_clicked), but));
+
+	return but;
+}
+
+
+void
+BreadCrumbBox::breadcrumb_clicked(BreadCrumb* crumb)
+{
+	if (_enable_signal) {
+		_enable_signal = false;
+
+		if (!crumb->get_active()) {
+			// Tried to turn off the current active button, bad user, no cookie
+			crumb->set_active(true);
+		} else {
+			signal_patch_selected.emit(crumb->path(), crumb->view());
+			if (crumb->path() != _active_path)
+				crumb->set_active(false);
+		}
+		_enable_signal = true;
+	}
+}
+
+
+void
+BreadCrumbBox::object_destroyed(const Path& path)
+{
+	for (std::list<BreadCrumb*>::iterator i = _breadcrumbs.begin(); i != _breadcrumbs.end(); ++i) {
+		if ((*i)->path() == path) {
+			// Remove all crumbs after the removed one (inclusive)
+			for (std::list<BreadCrumb*>::iterator j = i; j != _breadcrumbs.end(); ) {
+				BreadCrumb* bc = *j;
+				j = _breadcrumbs.erase(j);
+				remove(*bc);
+			}
+			break;
+		}
+	}
+}
+
+
+void
+BreadCrumbBox::object_renamed(const Path& old_path, const Path& new_path)
+{
+	for (std::list<BreadCrumb*>::iterator i = _breadcrumbs.begin(); i != _breadcrumbs.end(); ++i) {
+		if ((*i)->path() == old_path)
+			(*i)->set_path(new_path);
+	}
+}
+
+
+} // namespace GUI
+} // namespace Ingen
+