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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_gui.h"
#include <stdio.h>
#include <string.h>
#include <lv2/lv2plug.in/ns/ext/instance-access/instance-access.h>
#include <lv2/lv2plug.in/ns/extensions/ui/ui.h>
#include "lv2_instance.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;
GUI::PluginGUI *gui;
struct lv2_external_ui_host *ui_host_ptr;
};
static void ui_run(struct lv2_external_ui * _this_)
{
struct DG_GUI *dggui = (struct DG_GUI *)_this_;
dggui->gui->processEvents();
}
static void ui_show(struct lv2_external_ui * _this_)
{
struct DG_GUI *dggui = (struct DG_GUI *)_this_;
dggui->gui->show();
}
static void ui_hide(struct lv2_external_ui * _this_)
{
struct DG_GUI *dggui = (struct DG_GUI *)_this_;
if(dggui->gui) dggui->gui->hide();
}
static void closeHandler(void *ptr)
{
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);
}
delete gui->gui;
gui->gui = NULL;
}
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 GUI::PluginGUI();
pt->gui->setWindowClosedCallback(closeHandler, pt);
*widget = (LV2UI_Widget)pt;
return pt;
}
static void ui_cleanup(LV2UI_Handle ui)
{
struct DG_GUI* pt = (struct DG_GUI*)ui;
delete pt->gui;
pt->gui = NULL;
delete pt;
}
static void ui_port_event(LV2UI_Handle ui,
uint32_t port_index,
uint32_t buffer_size,
uint32_t format,
const void * buffer)
{
}
#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)
{
if(index == 0) return &descriptor;
return NULL;
}
#ifdef __cplusplus
}
#endif
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