Hide window from taskbar? (in multi window app)

beginners
#1

Hi!
I have a multi-window app and I would like to hide (and show) the sub-windows of my project whenever I need. Is that Possible?
I’m on windows 10 and the project is based on the example “multiWindowExample”.

Side note: I can’t just set the position of the window out of the screen because it will be still listed in the taskbar.

Any hint will be very appreciated.
Thanks!

#2

I just found out a method and I’ll leave it here for those who may have the same problem.

  1. Each window (that you want to show or hide) has to have a variable of type “GLFWwindow” to refer to. For example, in the “multiWindowExample” that comes with oF, you can add something like this to the class “GuiApp.h” (just below “ofxPanel gui:”):
    GLFWwindow * window1:

  2. Now you can access to that window with that reference (“window1”).
    So, you can hide “window1” from the main app (ofApp.cpp) with just:
    glfwHideWindow(window1);

and you can show it again with:
glfwShowWindow(wind);

Hope someone find this usefull. cheers!

#3

Hi,

I’m trying this in Windows

GLFWwindow *myOhmy = (GLFWwindow*) ofGetWindowPtr();
glfwHideWindow(	myOhmy );

In main.cpp:

ofAppGLFWWindow* win = new ofAppGLFWWindow();
ofSetupOpenGL(win, 800, 250, OF_WINDOW);
ofRunApp( new ofApp());

Unfortunately I’m not getting the window to hide. Any tips?
Thanks!

#4

Hi Regi,
I’m not on my computer right now, so I can’t test it.
I suggest you to open the ‘multiWindowExample’ that comes with openFrameworks and try adding the lines I explained above. If you can make it work there, then you can add it to your project.

#5

yeh, this doesn’t work, at least not in the 0.11 version of OF.

#6

Hmm the following works for me on macOS on 0.11.0

Modifying the multiWindowOneAppExample:

ofApp.cpp

#include "ofApp.h"
#include "GLFW/glfw3.h"

//--------------------------------------------------------------
void ofApp::setup(){
	ofBackground(255);
	ofSetCircleResolution(200);
}

//--------------------------------------------------------------
void ofApp::setupGui(){
	parameters.setName("parameters");
	parameters.add(radius.set("radius",50,1,100));
	parameters.add(color.set("color",100,ofColor(0,0),255));
	gui.setup(parameters);
	ofSetBackgroundColor(0);
}

//--------------------------------------------------------------
void ofApp::update(){
	auto glfwWin = dynamic_pointer_cast<ofAppGLFWWindow>(guiWindow);

	if( ofGetFrameNum() % 200 == 100 ){
		glfwHideWindow(glfwWin->getGLFWWindow());
	}else if( ofGetFrameNum() % 200 == 199 ){
		glfwShowWindow(glfwWin->getGLFWWindow());
	}
}

Add to ofApp.h

		//inside of ofApp class 
		shared_ptr<ofAppBaseWindow> guiWindow;

main.cpp

#include "ofMain.h"
#include "ofApp.h"
#include "ofAppGLFWWindow.h"

//========================================================================
int main( ){
	ofGLFWWindowSettings settings;
    settings.setSize(600, 600);
	settings.setPosition(glm::vec2(300,0));
	settings.resizable = true;
	shared_ptr<ofAppBaseWindow> mainWindow = ofCreateWindow(settings);

    settings.setSize(300, 300);
	settings.setPosition(glm::vec2(0,0));
	settings.resizable = false;
	// uncomment next line to share main's OpenGL resources with gui
	//settings.shareContextWith = mainWindow;
	shared_ptr<ofApp> mainApp(new ofApp);

	mainApp->guiWindow = ofCreateWindow(settings);
	mainApp->guiWindow->setVerticalSync(false);

	mainApp->setupGui();
	ofAddListener(mainApp->guiWindow->events().draw,mainApp.get(),&ofApp::drawGui);

	ofRunApp(mainWindow, mainApp);
	ofRunMainLoop();

}

If the above doesn’t work for you, you could always use:

HWND ofAppBaseWindow::getWin32Window()

paired with:

Which would let you show / hide the window using the HWND

Hope that helps!
Theo

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