Thanks for the example @hahakid - however, I couldn't really apply it to my use case. So I made a buildable minimal "working" example, based on examples/emptyExample. Use standard Makefile and main.cpp; and then:
ofApp.h
#pragma once
#include "ofMain.h"
#define BUFLEN 2000000
class ofApp : public ofBaseApp{
public:
unsigned char myBuf[BUFLEN];
int state = 0;
bool doLoad;
void LoadAndInitHeavyHog();
ofTrueTypeFont myfont;
void setup();
void update();
void draw();
void keyPressed(int key);
void keyReleased(int key);
void mouseMoved(int x, int y);
void mouseDragged(int x, int y, int button);
void mousePressed(int x, int y, int button);
void mouseReleased(int x, int y, int button);
void mouseEntered(int x, int y);
void mouseExited(int x, int y);
void windowResized(int w, int h);
void dragEvent(ofDragInfo dragInfo);
void gotMessage(ofMessage msg);
};ofApp.cpp
#include "ofApp.h"
void ofApp::LoadAndInitHeavyHog(){
for(unsigned long i=0; i<BUFLEN; i++) {
unsigned char val = ((i + i/3)/150)%255;
myBuf[i] = val;
if ( (i%25) == 0 ) {
ofLogNotice() << " ... i: " << i; //hog even more by dumping to stdout
}
}
state = 1;
doLoad = false;
}
//--------------------------------------------------------------
void ofApp::setup(){
ofSetLogLevel(OF_LOG_NOTICE);
state = 0;
doLoad = false;
myfont.load("arial.ttf", 32);
}
//--------------------------------------------------------------
void ofApp::update(){
}
//--------------------------------------------------------------
void ofApp::draw(){
if (state == 0) {
myfont.drawString("State 0 - click anywhere", 100,100);
}
if ((state == 0) && (doLoad)) {
myfont.drawString(" --- LOADING --- ", 100,100);
LoadAndInitHeavyHog();
}
if (state == 1) {
myfont.drawString("State 1 - loaded...", 100,100);
}
}
//--------------------------------------------------------------
void ofApp::keyPressed(int key){
}
//--------------------------------------------------------------
void ofApp::keyReleased(int key){
}
//--------------------------------------------------------------
void ofApp::mouseMoved(int x, int y){
}
//--------------------------------------------------------------
void ofApp::mouseDragged(int x, int y, int button){
}
//--------------------------------------------------------------
void ofApp::mousePressed(int x, int y, int button){
ofLogNotice() << "::mousePressed ";
if (state == 0) {
doLoad = true;
}
}
//--------------------------------------------------------------
void ofApp::mouseReleased(int x, int y, int button){
}
//--------------------------------------------------------------
void ofApp::mouseEntered(int x, int y){
}
//--------------------------------------------------------------
void ofApp::mouseExited(int x, int y){
}
//--------------------------------------------------------------
void ofApp::windowResized(int w, int h){
}
//--------------------------------------------------------------
void ofApp::gotMessage(ofMessage msg){
}
//--------------------------------------------------------------
void ofApp::dragEvent(ofDragInfo dragInfo){
}In this example, when I build it on Linux, the " --- LOADING --- " message is not shown when I click the window, however, as evidenced by the log messages in stdout, the LoadAndInitHeavyHog() runs - and when it's done, I do get "State 1 - loaded..." shown...
Any hints on how do I get the LOADING message to show in this case?