zynaddsubfx

ZynAddSubFX open source synthesizer
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ZynAddSubFX-UI.cpp (3379B)

      1 /*
      2   ZynAddSubFX - a software synthesizer
      3 
      4   ZynAddSubFX-UI.cpp - DPF + ZynAddSubFX External UI
      5   Copyright (C) 2015-2016 Filipe Coelho
      6   Author: Filipe Coelho
      7 
      8   This program is free software; you can redistribute it and/or
      9   modify it under the terms of the GNU General Public License
     10   as published by the Free Software Foundation; either version 2
     11   of the License, or (at your option) any later version.
     12 */
     13 
     14 // DPF includes
     15 #include "DistrhoUI.hpp"
     16 
     17 /* ------------------------------------------------------------------------------------------------------------
     18  * ZynAddSubFX UI class */
     19 
     20 class ZynAddSubFXUI : public UI
     21 {
     22 public:
     23     ZynAddSubFXUI(const intptr_t wid, const char* const bpath)
     24         : UI(390, 525),
     25           oscPort(0),
     26           winId(wid)
     27     {
     28         setTitle("ZynAddSubFX");
     29 
     30 #if DISTRHO_OS_MAC
     31         extUiPath  = bpath;
     32         extUiPath += "/zynaddsubfx-ext-gui";
     33 #else
     34         extUiPath = "zynaddsubfx-ext-gui";
     35 
     36         // unused
     37         return; (void)bpath;
     38 #endif
     39     }
     40 
     41     ~ZynAddSubFXUI() override
     42     {
     43     }
     44 
     45 protected:
     46    /* --------------------------------------------------------------------------------------------------------
     47     * DSP/Plugin Callbacks */
     48 
     49    /**
     50       A parameter has changed on the plugin side.
     51       This is called by the host to inform the UI about parameter changes.
     52     */
     53     void parameterChanged(uint32_t index, float value) override
     54     {
     55         switch (index)
     56         {
     57         case kParamOscPort: {
     58             const int port = int(value+0.5f);
     59 
     60             if (oscPort != port)
     61             {
     62                 oscPort = port;
     63                 respawnAtURL(port);
     64             }
     65         } break;
     66         }
     67     }
     68 
     69    /**
     70       A program has been loaded on the plugin side.
     71       This is called by the host to inform the UI about program changes.
     72     */
     73     void programLoaded(uint32_t index) override
     74     {
     75         (void)index; // ZynAddSubFX::loadProgram already informs the UI
     76     }
     77 
     78    /**
     79       A state has changed on the plugin side.
     80       This is called by the host to inform the UI about state changes.
     81     */
     82     void stateChanged(const char* key, const char* value) override
     83     {
     84         (void)key; (void)value;
     85     }
     86 
     87 private:
     88     int oscPort;
     89     String extUiPath;
     90     const intptr_t winId;
     91 
     92     void respawnAtURL(const int url)
     93     {
     94         char urlAsString[32];
     95         sprintf(urlAsString, "osc.udp://localhost:%i/", url);
     96 
     97         char winIdAsString[32];
     98         sprintf(winIdAsString, "%llu", (long long unsigned)(winId ? winId : 1));
     99 
    100         printf("Now respawning at '%s', using winId '%s'\n", urlAsString, winIdAsString);
    101 
    102         const char* args[] = {
    103             extUiPath.buffer(),
    104             "--embed",
    105             winIdAsString,
    106             "--title",
    107             getTitle(),
    108             urlAsString,
    109             nullptr
    110         };
    111 
    112         startExternalProcess(args);
    113     }
    114 
    115     DISTRHO_DECLARE_NON_COPY_CLASS(ZynAddSubFXUI)
    116 };
    117 
    118 /* ------------------------------------------------------------------------------------------------------------
    119  * Create UI, entry point */
    120 
    121 START_NAMESPACE_DISTRHO
    122 
    123 UI* createUI()
    124 {
    125 #if DISTRHO_PLUGIN_HAS_EMBED_UI
    126     const uintptr_t winId = UI::getNextWindowId();
    127 #else
    128     const uintptr_t winId = 0;
    129 #endif
    130     const char* const bundlePath = UI::getNextBundlePath();
    131 
    132     return new ZynAddSubFXUI(winId, bundlePath);
    133 }
    134 
    135 END_NAMESPACE_DISTRHO