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Hi, I'm after the best way to check the number of inputs from within the execute method of my plugin (which derives from both Iop & Executable). My node accepts a multiple number of inputs but I need to check that at least 2 inputs are connected. Currently I do this: void MyClass::execute() { if( inputs() < 2 ) { cerr << "Error - Too few image inputs." << endl; message_f( '!', "Too few image inputs." ); return; } ... } But I'm finding that if someone disconnects an input to my node (so as to leave just 1 input) and then triggers the knob button to call my execute method inputs() still evaluates to 2. I've put comments in my code and it appears _validate() doesn't get called as a result of disconnecting the input node - so my node still thinks it has 2 inputs attached. Is there are more appropriate test to check for this condition? Should I call validate() from within execute() or is this asking for trouble? I was going to try casting the second input to the desired node type and checking against NULL as a getaround solution but I'm guessing there's a better way. Thanks, Jeff. |
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