In After Effects plug-in development, how can I make a checkbox disable other UI components?

Question

Hello,I’m new to After Effects plug-in development. I want to make a checkbox control disable (gray out) the color picker next to it. How can I implement this? #include "Skeleton.h" //-------------------------------------------------------------------------------------------------static PF_Err About(PF_InData* in_data, PF_OutData* out_data, PF_ParamDef* params[], PF_LayerDef* output) { // About关于窗口AEGP_SuiteHandler suites(in_data->pica_basicP); suites.ANSICallbacksSuite1()->sprintf(out_data->return_msg,"%s v%d.%d\r%s","插件名字",MAJOR_VERSION,MINOR_VERSION,"about信息\rAn empty (skeletal, if you will) effect sample,\r for your modifying pleasure.\rCopyright 2007-2023 Adobe Inc.");return PF_Err_NONE;}//-------------------------------------------------------------------------------------------------static PF_Err GlobalSetup(PF_InData* in_data, PF_OutData* out_data, PF_ParamDef* params[], PF_LayerDef* output) { //初始化插件out_data->my_version = PF_VERSION(MAJOR_VERSION,MINOR_VERSION,BUG_VERSION,STAGE_VERSION,BUILD_VERSION); //out_data->out_flags = PF_OutFlag_PIX_INDEPENDENT; // just 16bpc, not 32bpcout_data->out_flags = 0;out_data->out_flags2 = 0; return PF_Err_NONE;}//-------------------------------------------------------------------------------------------------static PF_Err ParamsSetup(PF_InData* in_data, PF_OutData* out_data, PF_ParamDef* params[], PF_LayerDef* output) { //插件ui初始化PF_Err err = PF_Err_NONE;PF_ParamDef def; AEFX_CLR_STRUCT(def); PF_ADD_POINT("填充点", 1, 1, NULL, POINT_DISK_ID);AEFX_CLR_STRUCT(def); PF_ADD_FLOAT_SLIDERX("边框色范围", 0.0, 100.0, 0.0, 100.0, 0.0, PF_Precision_TENTHS, PF_ValueDisplayFlag_PERCENT, 0, GAIN_DISK_ID);AEFX_CLR_STRUCT(def); PF_ADD_CHECKBOXX("边框色1开启", TRUE, PF_ParamFlag_SUPERVISE, CHECKBOX1_DISK_ID);AEFX_CLR_STRUCT(def); PF_ADD_COLOR("边框色1", PF_MAX_CHAN8, 0, 0, COLOR1_DISK_ID);AEFX_CLR_STRUCT(def); PF_ADD_CHECKBOXX("边框色2开启", FALSE, PF_ParamFlag_SUPERVISE, CHECKBOX2_DISK_ID);AEFX_CLR_STRUCT(def); PF_ADD_COLOR("边框色2", PF_MAX_CHAN8, 0, 0, COLOR2_DISK_ID);AEFX_CLR_STRUCT(def); PF_ADD_CHECKBOXX("边框色3开启", FALSE, PF_ParamFlag_SUPERVISE, CHECKBOX3_DISK_ID);AEFX_CLR_STRUCT(def); PF_ADD_COLOR("边框色3", PF_MAX_CHAN8, 0, 0, COLOR3_DISK_ID);AEFX_CLR_STRUCT(def); PF_ADD_CHECKBOXX("边框色4开启", FALSE, PF_ParamFlag_SUPERVISE, CHECKBOX4_DISK_ID);AEFX_CLR_STRUCT(def); PF_ADD_COLOR("边框色4", PF_MAX_CHAN8, 0, 0, COLOR4_DISK_ID); out_data->num_params = SKELETON_NUM_PARAMS; return err;}//-------------------------------------------------------------------------------------------------static PF_Err MySimpleGainFunc8(void* refcon, A_long xL, A_long yL, PF_Pixel8* inP, PF_Pixel8* outP) {PF_Err err = PF_Err_NONE;GainInfo* giP = reinterpret_cast(refcon);PF_FpLong tempF = 0;PF_Pixel8 COLOR1, COLOR2, COLOR3, COLOR4; if (giP) {// 容错范围tempF = giP->gainF * PF_MAX_CHAN8 / 100;COLOR1 = giP->COLOR1;COLOR2 = giP->COLOR2;COLOR3 = giP->COLOR3;COLOR4 = giP->COLOR4; PF_Pixel8 tempP;if (inP->alpha <= 0) {// 完全透明的像素显示为不透明白色tempP.alpha = PF_MAX_CHAN8;tempP.red = PF_MAX_CHAN8;tempP.green = PF_MAX_CHAN8;tempP.blue = PF_MAX_CHAN8;}else if (inP->alpha >= PF_MAX_CHAN8) {// 不透明像素保持原始颜色tempP = *inP;}else {// 部分透明的像素，按 alpha 叠加白色背景tempP.alpha = PF_MAX_CHAN8;tempP.red = (inP->red * inP->alpha + PF_MAX_CHAN8 * (PF_MAX_CHAN8 - inP->alpha)) / PF_MAX_CHAN8;tempP.green = (inP->green * inP->alpha + PF_MAX_CHAN8 * (PF_MAX_CHAN8 - inP->alpha)) / PF_MAX_CHAN8;tempP.blue = (inP->blue * inP->alpha + PF_MAX_CHAN8 * (PF_MAX_CHAN8 - inP->alpha)) / PF_MAX_CHAN8;} // 检测tempP是否与目标颜色相同if ((abs(tempP.red - COLOR1.red) <= tempF && abs(tempP.green - COLOR1.green) <= tempF && abs(tempP.blue - COLOR1.blue) <= tempF) ||(abs(tempP.red - COLOR2.red) <= tempF && abs(tempP.green - COLOR2.green) <= tempF && abs(tempP.blue - COLOR2.blue) <= tempF) ||(abs(tempP.red - COLOR3.red) <= tempF && abs(tempP.green - COLOR3.green) <= tempF && abs(tempP.blue - COLOR3.blue) <= tempF) ||(abs(tempP.red - COLOR4.red) <= tempF && abs(tempP.green - COLOR4.green) <= tempF && abs(tempP.blue - COLOR4.blue) <= tempF)) {// 如果相同，输出白色outP->alpha = PF_MAX_CHAN8;outP->red = PF_MAX_CHAN8;outP->green = PF_MAX_CHAN8;outP->blue = PF_MAX_CHAN8;}else {// 如果不同，输出黑色outP->alpha = PF_MAX_CHAN8;outP->red = 0;outP->green = 0;outP->blue = 0;} }return err;}//-------------------------------------------------------------------------------------------------static PF_Err Render(PF_InData* in_data, PF_OutData* out_data, PF_ParamDef* params[], PF_LayerDef* output) { //渲染,在首次应用插件,以及更改插件参数值时执行PF_Err err = PF_Err_NONE;AEGP_SuiteHandler suites(in_data->pica_basicP); /* Put interesting code here. */GainInfo giP;AEFX_CLR_STRUCT(giP);A_long linesL = output->extent_hint.bottom - output->extent_hint.top; giP.gainF = params[SKELETON_GAIN]->u.fs_d.value; // 记录哪些颜色被启用giP.use_COLOR1 = params[SKELETON_CHECKBOX1]->u.bd.value;giP.use_COLOR2 = params[SKELETON_CHECKBOX2]->u.bd.value;giP.use_COLOR3 = params[SKELETON_CHECKBOX3]->u.bd.value;giP.use_COLOR4 = params[SKELETON_CHECKBOX4]->u.bd.value; giP.COLOR1 = params[SKELETON_COLOR1]->u.cd.value;giP.COLOR2 = params[SKELETON_COLOR2]->u.cd.value;giP.COLOR3 = params[SKELETON_COLOR3]->u.cd.value;giP.COLOR4 = params[SKELETON_COLOR4]->u.cd.value; ERR(suites.Iterate8Suite2()->iterate(in_data,0, // progress baselinesL, // progress final¶ms[SKELETON_INPUT]->u.ld, // src NULL, // area - null for all pixels(void*)&giP, // refcon - your custom data pointerMySimpleGainFunc8, // pixel function pointeroutput)); return err;}//-------------------------------------------------------------------------------------------------extern "C" DllExport PF_Err PluginDataEntryFunction2(PF_PluginDataPtr inPtr, PF_PluginDataCB2 inPluginDataCallBackPtr, SPBasicSuite* inSPBasicSuitePtr, const char* inHostName, const char* inHostVersion) {PF_Err result = PF_Err_INVALID_CALLBACK; result = PF_REGISTER_EFFECT_EXT2(inPtr,inPluginDataCallBackPtr,"Skeleton", // Name"ADBE Skeleton", // Match Name"Sample Plug-ins", // CategoryAE_RESERVED_INFO, // Reserved Info"EffectMain", // Entry point"https://www.adobe.com"); // support URL return result;}//-------------------------------------------------------------------------------------------------PF_Err EffectMain(PF_Cmd cmd, PF_InData* in_data, PF_OutData* out_data, PF_ParamDef* params[], PF_LayerDef* output, void* extra) { //主函数PF_Err err = PF_Err_NONE; try {switch (cmd) {case PF_Cmd_ABOUT:err = About(in_data, out_data, params, output);break;case PF_Cmd_GLOBAL_SETUP:err = GlobalSetup(in_data, out_data, params, output);break;case PF_Cmd_PARAMS_SETUP:err = ParamsSetup(in_data, out_data, params, output);break;case PF_Cmd_RENDER:err = Render(in_data, out_data, params, output);break;}}catch (PF_Err& thrown_err) {err = thrown_err;}return err;}

Richard Rosenman · Accepted Answer

To enable and disable parameters, you typically do this in the UserChangedParam() and UpdateParameterUI() functions.

You will also need to 'supervise' the parameter you want to check so that AE notifies you that it has been toggled / clicked. You generally do this by adding the def.flags = PF_ParamFlag_SUPERVISE; flag to whichever parameter it is you want to check, although some parameters require this flag in a different section of it's declaration.

And finally, I think you might also need to add the PF_OutFlag_SEND_UPDATE_PARAMS_UI flag in GlobalSetup () to let AE know you are going to supervise some parameters.

I'm sure there is an example that comes witht he SDK that shows code examples on how this is done. It's tricky at first but once you figure it out once, it gets easier.

EDIT: Check out the Supervisor project that comes with the SDK. I think that'll show you exactly what I just described.

Regards,

-Rich

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