HI! i’m making an app that count dots, using blob detection.
I want to trigger this event contourFinder.findContours(grayImage, 1, 150, 400, true); when i touch the button of the ofxUI. I try it a lot but no results! any help!?
What exact problem do you have?
Can you show us the code?
Please look at
first “if”-statement inside void ofApp::guiEvent(ofxUIEventArgs &e) is what you probably need
Hi! sure but how i declared to B1 im using two buttons. Thanks a lor for helping!
#include “testApp.h”
//--------------------------------------------------------------
void testApp::setup(){
// ofSetOrientation(OF_ORIENTATION_90_RIGHT);//Set iOS to Orientation Landscape Right
ofSetVerticalSync(true);
ofEnableSmoothing();
drawPadding = false;
gui = new ofxUICanvas();
capW = 320;
capH = 240;
#ifdef _USE_LIVE_VIDEO
vidGrabber.initGrabber(capW, capH);
capW = vidGrabber.getWidth();
capH = vidGrabber.getHeight();
#else
vidPlayer.loadMovie("fingers.m4v");
vidPlayer.setLoopState(OF_LOOP_NORMAL);
vidPlayer.play();
#endif
colorImg.allocate(capW,capH);
grayImage.allocate(capW,capH);
grayBg.allocate(capW,capH);
grayDiff.allocate(capW,capH);
bLearnBakground = true;
threshold = 80;
ofSetFrameRate(20);
//User-Interface
gui->addButton("B1", false, 44, 44);
gui->addButton("B2", false, 44, 44);
gui->setGlobalButtonDimension(24);
gui->addSpacer();
}
//--------------------------------------------------------------
void testApp::update(){
ofBackground(100,100,100);
bool bNewFrame = false;
#ifdef _USE_LIVE_VIDEO
vidGrabber.update();
bNewFrame = vidGrabber.isFrameNew();
#else
vidPlayer.update();
bNewFrame = vidPlayer.isFrameNew();
#endif
if (bNewFrame){
#ifdef _USE_LIVE_VIDEO
if( vidGrabber.getPixels() != NULL ){
#else
if( vidPlayer.getPixels() != NULL && vidPlayer.getWidth() > 0 ){
#endif
#ifdef _USE_LIVE_VIDEO
colorImg.setFromPixels(vidGrabber.getPixels(), capW, capH);
#else
colorImg.setFromPixels(vidPlayer.getPixels(), capW, capH);
#endif
grayImage = colorImg;
if (bLearnBakground == true){
grayBg = grayImage; // the = sign copys the pixels from grayImage into grayBg (operator overloading)
bLearnBakground = false;
}
// take the abs value of the difference between background and incoming and then threshold:
grayDiff.absDiff(grayBg, grayImage);
grayDiff.threshold(threshold);
//find contours which are between the size of 20 pixels and 1/3 the w*h pixels.
// also, find holes is set to true so we will get interior contours as well....
// find holes
}
}
}
//--------------------------------------------------------------
void testApp::draw(){
ofSetColor(255);
ofDrawBitmapString(ofToString(ofGetFrameRate()), 20, 20);
ofPushMatrix();
ofScale(0.5, 0.5, 1);
// draw the incoming, the grayscale, the bg and the thresholded difference
ofSetHexColor(0xffffff);
grayImage.draw(0,0);
grayBg.draw(capW+4, 0);
grayDiff.draw(0, capH + 4);
// lets draw the contours.
// this is how to get access to them:
for (int i = 0; i < contourFinder.nBlobs; i++){
contourFinder.blobs[i].draw(0, capH + 4);
}
ofPopMatrix();
// finally, a report:
ofSetHexColor(0xfffff);
char reportStr[1024];
sprintf(reportStr, "MicroTracerIOS 1.0 ' ' threshold %i\nnum dots found %i", threshold, contourFinder.nBlobs );
ofDrawBitmapString(reportStr, 0, 30);
//user-interface
}
void testApp::guiEvent(ofxUIEventArgs &e)
{
string name = e.widget->getName();
int kind = e.widget->getKind();
if(kind == OFX_UI_WIDGET_BUTTON)
{
ofxUIButton *button = (ofxUIButton *) e.widget;
cout << name << "\t value: " << button->getValue() << endl;
}
else if(kind == OFX_UI_WIDGET_TOGGLE)
{
ofxUIToggle *toggle = (ofxUIToggle *) e.widget;
cout << name << "\t value: " << toggle->getValue() << endl;
}
else if(kind == OFX_UI_WIDGET_IMAGEBUTTON)
{
ofxUIImageButton *button = (ofxUIImageButton *) e.widget;
cout << name << "\t value: " << button->getValue() << endl;
}
else if(kind == OFX_UI_WIDGET_IMAGETOGGLE)
{
ofxUIImageToggle *toggle = (ofxUIImageToggle *) e.widget;
cout << name << "\t value: " << toggle->getValue() << endl;
}
else if(kind == OFX_UI_WIDGET_LABELBUTTON)
{
ofxUILabelButton *button = (ofxUILabelButton *) e.widget;
cout << name << "\t value: " << button->getValue() << endl;
}
else if(kind == OFX_UI_WIDGET_LABELTOGGLE)
{
ofxUILabelToggle *toggle = (ofxUILabelToggle *) e.widget;
cout << name << "\t value: " << toggle->getValue() << endl;
}
else if(name == "B1")
{
// ofxUIButton *button = (ofxUIButton *) e.widget;
//cout << "value: " << button->getValue() << endl;
contourFinder.findContours(grayImage, 1, 150, 400, true);
}
else if(name == "B2")
{
//ofxUIButton *button = (ofxUIButton *) e.widget;
// cout << "value: " << button->getValue() << endl;
bLearnBakground = true;
}
else if(name == "T1")
{
ofxUIToggle *toggle = (ofxUIToggle *) e.widget;
cout << "value: " << toggle->getValue() << endl;
}
else if(name == "T2")
{
ofxUIToggle *toggle = (ofxUIToggle *) e.widget;
cout << "value: " << toggle->getValue() << endl;
}
}
//--------------------------------------------------------------
void testApp::exit(){
}
//--------------------------------------------------------------
void testApp::deviceOrientationChanged(int newOrientation){
}
So what doesn’t work?
Can you provide us with link to the code (github repository or zip archive)?
At first sight I see logic error here.
if(kind == OFX_UI_WIDGET_BUTTON) {
...
} else if(name == "B1") {
...
}
Here if(name == “B1”) won’t run because all buttons will be catched by “kind” branch. You need to remove else-keyword, so your code will be structured like this
if(kind == ...) { // debug code from example above
...
} else if (kind == ...) {
...
}
// second if-else here
if (name == ...) {
...
} else if (name == ...) {
...
}Allright ! i will try that here is the link! https://github.com/jorgeavila/dotCountingIos.git
I have like 1 year programming! but i’m new at OF! thanks
dude! i’m getting this error [ error ] ofTrueTypeFont: drawString(): font not allocated: line 1077 in /Users/jorge/Documents/of_v0.8.0_ios_release/libs/openFrameworks/graphics/ofTrueTypeFont.cpp
i try to fixed but nothing!