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-rw-r--r--lv2/lv2_gui.cc256
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diff --git a/lv2/lv2_gui.cc b/lv2/lv2_gui.cc
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * lv2.cc
+ *
+ * Wed Jul 13 13:50:33 CEST 2011
+ * Copyright 2011 Bent Bisballe Nyeng
+ * deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ * This file is part of DrumGizmo.
+ *
+ * DrumGizmo 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.
+ *
+ * DrumGizmo 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 DrumGizmo; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+#include <lv2.h>
+
+#include "lv2_gui.h"
+#include "lv2_ui.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include "lv2_instance.h"
+
+#include "lv2_instance-access.h"
+// From: http://codesearch.google.com/#50sg5qT6WNE/src/lv2_ui_dssi.c
+// git://repo.or.cz/nekobee.git/src/lv2_ui_dssi.c
+
+#define DRUMGIZMO_UI_URI "http://drumgizmo.org/lv2-gui"
+
+#include <plugingui.h>
+
+/**
+ * When LV2_EXTERNAL_UI_URI UI is instantiated, the returned
+ * LV2UI_Widget handle must be cast to pointer to struct lv2_external_ui.
+ * UI is created in invisible state.
+ */
+struct lv2_external_ui
+{
+ /**
+ * Host calls this function regulary. UI library implementing the
+ * callback may do IPC or redraw the UI.
+ *
+ * @param _this_ the UI context
+ */
+ void (* run)(struct lv2_external_ui * _this_);
+
+ /**
+ * Host calls this function to make the plugin UI visible.
+ *
+ * @param _this_ the UI context
+ */
+ void (* show)(struct lv2_external_ui * _this_);
+
+ /**
+ * Host calls this function to make the plugin UI invisible again.
+ *
+ * @param _this_ the UI context
+ */
+ void (* hide)(struct lv2_external_ui * _this_);
+};
+
+/** UI extension suitable for out-of-process UIs */
+#define LV2_EXTERNAL_UI_URI "http://lv2plug.in/ns/extensions/ui#external"
+
+/**
+ * On UI instantiation, host must supply LV2_EXTERNAL_UI_URI
+ * feature. LV2_Feature::data must be pointer to struct lv2_external_ui_host. */
+struct lv2_external_ui_host
+{
+ /**
+ * Callback that plugin UI will call
+ * when UI (GUI window) is closed by user.
+ * This callback wil; be called during execution of lv2_external_ui::run()
+ * (i.e. not from background thread).
+ *
+ * After this callback is called, UI is defunct. Host must call
+ * LV2UI_Descriptor::cleanup(). If host wants to make the UI visible
+ * again UI must be reinstantiated.
+ *
+ * @param controller Host context associated with plugin UI, as
+ * supplied to LV2UI_Descriptor::instantiate()
+ */
+ void (* ui_closed)(LV2UI_Controller controller);
+
+ /**
+ * Optional (may be NULL) "user friendly" identifier which the UI
+ * may display to allow a user to easily associate this particular
+ * UI instance with the correct plugin instance as it is represented
+ * by the host (e.g. "track 1" or "channel 4").
+ *
+ * If supplied by host, the string will be referenced only during
+ * LV2UI_Descriptor::instantiate()
+ */
+ const char * plugin_human_id;
+};
+
+struct DG_GUI {
+ struct lv2_external_ui virt;
+
+ LV2_Handle instance_handle;
+ LV2_Extension_Data_Feature *data_access;
+ DrumGizmo *instance;
+ LV2UI_Controller controller;
+
+ PluginGUI *gui;
+ struct lv2_external_ui_host *ui_host_ptr;
+};
+
+static void ui_run(struct lv2_external_ui * _this_)
+{
+ printf("run() called\n");
+ struct DG_GUI *dggui = (struct DG_GUI *)_this_;
+ dggui->gui->processEvents();
+}
+
+static void ui_show(struct lv2_external_ui * _this_)
+{
+ printf("show() called\n");
+ struct DG_GUI *dggui = (struct DG_GUI *)_this_;
+ dggui->gui->show();
+}
+
+static void ui_hide(struct lv2_external_ui * _this_)
+{
+ printf("hide() called\n");
+ struct DG_GUI *dggui = (struct DG_GUI *)_this_;
+ dggui->gui->hide();
+}
+
+static void closeHandler(void *ptr)
+{
+ printf("> closeHandler\n");
+ struct DG_GUI *gui = (struct DG_GUI *)ptr;
+ if(gui->ui_host_ptr && gui->ui_host_ptr->ui_closed)
+ gui->ui_host_ptr->ui_closed(gui->controller);
+ gui->gui->hide();
+ printf("< closeHandler\n");
+}
+
+static void midimapHandler(void *ptr, const char* file)
+{
+ printf("> midimapHandler %s\n", file);
+ struct DG_GUI *gui = (struct DG_GUI *)ptr;
+ gui->instance->midimapfile = file;
+
+ DGLV2 *dglv2 = (DGLV2 *)gui->instance_handle;
+ dglv2->in->loadMidiMap(file);
+
+ printf("< midimapHandler\n");
+}
+
+static LV2UI_Handle ui_instantiate(const struct _LV2UI_Descriptor * descriptor,
+ const char * plugin_uri,
+ const char * bundle_path,
+ LV2UI_Write_Function write_function,
+ LV2UI_Controller controller,
+ LV2UI_Widget * widget,
+ const LV2_Feature * const * features)
+{
+ printf("ui_instantiate\n");
+
+ struct DG_GUI* pt = new struct DG_GUI;
+
+ pt->ui_host_ptr = NULL;
+ pt->controller = controller;
+
+ while (*features != NULL) {
+ std::string uri = (*features)->URI;
+ void *data = (*features)->data;
+
+ printf("DGUI: feature: %s\n", uri.c_str());
+
+ if(uri == LV2_INSTANCE_ACCESS_URI) {
+ pt->instance_handle = data;
+ }
+
+ if(uri == LV2_DATA_ACCESS_URI) {
+ pt->data_access = (LV2_Extension_Data_Feature *)data;
+ }
+
+ if(uri == LV2_EXTERNAL_UI_URI) {
+ pt->ui_host_ptr = (struct lv2_external_ui_host *)data;
+ }
+ features++;
+ }
+
+ LV2_DrumGizmo_Descriptor *dgd =
+ (LV2_DrumGizmo_Descriptor *)(*pt->data_access->data_access)(PLUGIN_INSTANCE_URI);
+
+ pt->instance = dgd->get_pci(pt->instance_handle);
+ pt->virt.run = ui_run;
+ pt->virt.show = ui_show;
+ pt->virt.hide = ui_hide;
+ pt->gui = new PluginGUI(pt->instance);
+ pt->gui->setWindowClosedCallback(closeHandler, pt);
+ pt->gui->setChangeMidimapCallback(midimapHandler, pt);
+ // pt->gui->show();
+
+ *widget = (LV2UI_Widget)pt;
+
+ return pt;
+}
+
+static void ui_cleanup(LV2UI_Handle ui)
+{
+ printf("ui_cleanup\n");
+ struct DG_GUI* pt = (struct DG_GUI*)ui;
+ delete pt->gui;
+ delete pt;
+}
+
+static void ui_port_event(LV2UI_Handle ui,
+ uint32_t port_index,
+ uint32_t buffer_size,
+ uint32_t format,
+ const void * buffer)
+{
+ printf("ui_cport_event\n");
+}
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static LV2UI_Descriptor descriptor = {
+ DRUMGIZMO_UI_URI,
+ ui_instantiate,
+ ui_cleanup,
+ ui_port_event,
+ NULL
+};
+
+const LV2UI_Descriptor *lv2ui_descriptor(uint32_t index)
+{
+ printf("lv2ui_descriptor\n");
+
+ if(index == 0) return &descriptor;
+ return NULL;
+}
+
+#ifdef __cplusplus
+}
+#endif
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