From b8cea19b957b3af6ce0dd72f6441cb333e38ab94 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Fri, 31 Oct 2014 03:26:47 +0100
Subject: prototype [LV2]patch-change support for generic plugin UIs.

---
 gtk2_ardour/generic_pluginui.cc | 47 +++++++++++++++++++++++++++++++++++++++++
 gtk2_ardour/plugin_ui.h         |  6 ++++++
 2 files changed, 53 insertions(+)

(limited to 'gtk2_ardour')

diff --git a/gtk2_ardour/generic_pluginui.cc b/gtk2_ardour/generic_pluginui.cc
index 21a21b1751..e1d4609f6a 100644
--- a/gtk2_ardour/generic_pluginui.cc
+++ b/gtk2_ardour/generic_pluginui.cc
@@ -41,6 +41,9 @@
 #include "ardour/plugin.h"
 #include "ardour/plugin_insert.h"
 #include "ardour/session.h"
+#ifdef LV2_SUPPORT
+#include "ardour/lv2_plugin.h"
+#endif
 
 #include "ardour_ui.h"
 #include "prompter.h"
@@ -305,6 +308,34 @@ GenericPluginUI::build ()
 		} 
 	}
 
+#ifdef LV2_SUPPORT
+	boost::shared_ptr<ARDOUR::LV2Plugin> lv2p = boost::dynamic_pointer_cast<LV2Plugin> (plugin);
+	if (lv2p) {
+		_fcb = (Gtk::FileChooserButton**) malloc(lv2p->patch_count() * sizeof(Gtk::FileChooserButton*));
+		for (uint32_t p = 0; p < lv2p->patch_count(); ++p) {
+			_fcb[p] = manage (new Gtk::FileChooserButton (Gtk::FILE_CHOOSER_ACTION_OPEN));
+			_fcb[p]->signal_file_set().connect (sigc::bind(sigc::mem_fun (*this, &GenericPluginUI::patch_set_file), p));
+			lv2p->PatchChanged.connect (*this, invalidator (*this), boost::bind (&GenericPluginUI::patch_changed, this, _1), gui_context());
+			// when user cancels file selection the FileChooserButton will display "None"
+			// TODO hack away around this..
+			if (lv2p->patch_val(p)) {
+				_fcb[p]->set_filename(lv2p->patch_val(p));
+			}
+			if (lv2p->patch_key(p)) {
+				_fcb[p]->set_title(lv2p->patch_key(p));
+				Gtk::Label* fcl = manage (new Label (lv2p->patch_key(p)));
+				button_table.attach (*fcl, 0, button_cols, button_row, button_row + 1, FILL|EXPAND, FILL);
+				++button_row;
+			} else {
+				_fcb[p]->set_title(_("LV2 Patch"));
+			}
+
+			button_table.attach (*_fcb[p], 0, button_cols, button_row, button_row + 1, FILL|EXPAND, FILL);
+			++button_row;
+		}
+	}
+#endif
+
 	// Iterate over the list of controls to find which adjacent controls
 	// are similar enough to be grouped together.
 	
@@ -934,4 +965,20 @@ GenericPluginUI::output_update ()
 	}
 }
 
+#ifdef LV2_SUPPORT
 
+void
+GenericPluginUI::patch_set_file (uint32_t p)
+{
+	boost::shared_ptr<ARDOUR::LV2Plugin> lv2p = boost::dynamic_pointer_cast<LV2Plugin> (plugin);
+	lv2p->patch_set(p, _fcb[p]->get_filename ().c_str());
+}
+
+void
+GenericPluginUI::patch_changed (uint32_t p)
+{
+	boost::shared_ptr<ARDOUR::LV2Plugin> lv2p = boost::dynamic_pointer_cast<LV2Plugin> (plugin);
+	_fcb[p]->set_filename(lv2p->patch_val(p));
+}
+
+#endif
diff --git a/gtk2_ardour/plugin_ui.h b/gtk2_ardour/plugin_ui.h
index fefa999618..e5a5b59930 100644
--- a/gtk2_ardour/plugin_ui.h
+++ b/gtk2_ardour/plugin_ui.h
@@ -278,6 +278,12 @@ class GenericPluginUI : public PlugUIBase, public Gtk::VBox
 	void print_parameter (char *buf, uint32_t len, uint32_t param);
 	bool integer_printer (char* buf, Gtk::Adjustment &, ControlUI *);
 	bool midinote_printer(char* buf, Gtk::Adjustment &, ControlUI *);
+
+#ifdef LV2_SUPPORT
+	void patch_set_file (uint32_t patch_idx);
+	void patch_changed (uint32_t patch_idx);
+	Gtk::FileChooserButton **_fcb;
+#endif
 };
 
 class PluginUIWindow : public ArdourWindow
-- 
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