Millisecond Forums

+x

 

JoeMunro - 12/2/2022

Hi,

I am looking to draw to the screen, which I can do with the draw attribute of the trial,
But is there a way to only draw when the mosue is held down? So don't draw, hold down mouse to draw, mouse up don't draw.
This is my current code to draw:

<trial draw>
/ stimulusframes = [1 = imagesBW]
/ inputdevice = keyboard
/ validresponse = (" ")
/ draw = brush
/ screencapture = true
</trial>

Any help or if it's not possible would be great.
Joe

+x

 

Dave - 12/2/2022

+x

 

JoeMunro - 12/2/2022

Hi,

I am looking to draw to the screen, which I can do with the draw attribute of the trial,
But is there a way to only draw when the mosue is held down? So don't draw, hold down mouse to draw, mouse up don't draw.
This is my current code to draw:

<trial draw>
/ stimulusframes = [1 = imagesBW]
/ inputdevice = keyboard
/ validresponse = (" ")
/ draw = brush
/ screencapture = true
</trial>

Any help or if it's not possible would be great.
Joe

You would have to do something like this:

<block example>
/ trials = [1=start]
</block>

// waits for mouse button to be pressed
<trial start>
/ stimulusframes = [1=surface, example_stimulus]
/inputdevice = mouse
/showmousecursor = true
/validresponse = (lbuttondown)
/ branch = [
    return trial.draw;
]
/ recorddata = false
</trial>

// does the actual drawing and waits for mouse button to be lifted
<trial draw>
/ stimulusframes = [1=exitbutton]
/ inputdevice = mouse
/ draw = pencil
/ validresponse = (lbuttonup)
/ undodraw = [
    false;
]
/branch = [
    trial.pause;
]
/ recorddata = false
</trial>

// waits for mouse button to be pressed again to continue drawing or click on exit to end drawing
<trial pause>
/ stimulusframes = [1=exitbutton]
/inputdevice = mouse
/showmousecursor = true
/validresponse = (exitbutton, surface)
/ branch = [
    if (trial.pause.response != "exitbutton") {
        return trial.draw;
    } else {
        return trial.end;
    };
]
/ recorddata = false
</trial>

// takes a screen capture of the end result
<trial end>
/ trialduration = 20
/ screencapture = true
</trial>

<text example_stimulus>
/ items = ("Start drawing by pressing the left mouse button, pause by releasing the left mouse button.
When you are done drawing, click the exit button.")
/ erase = false
/ size = (80%, 80%)
/ txbgcolor = antiquewhite
</text>

<shape surface>
/ shape = rectangle
/ size = (100%, 100%)
/ erase = false
/ color = white
</shape>

<shape pencil>
/ shape = circle
/ color = black
/ size = (.5%, .5%)
/ erase = false
</shape>

<button exitbutton>
/ caption = "EXIT"
/ size = (5%, 4%)
/ position = (50%, 95%)
/ erase = false
</button>

+x

 

JoeMunro - 12/2/2022

+x

 

Dave - 12/2/2022

+x

 

JoeMunro - 12/2/2022

Hi,

I am looking to draw to the screen, which I can do with the draw attribute of the trial,
But is there a way to only draw when the mosue is held down? So don't draw, hold down mouse to draw, mouse up don't draw.
This is my current code to draw:

<trial draw>
/ stimulusframes = [1 = imagesBW]
/ inputdevice = keyboard
/ validresponse = (" ")
/ draw = brush
/ screencapture = true
</trial>

Any help or if it's not possible would be great.
Joe

You would have to do something like this:

<block example>
/ trials = [1=start]
</block>

// waits for mouse button to be pressed
<trial start>
/ stimulusframes = [1=surface, example_stimulus]
/inputdevice = mouse
/showmousecursor = true
/validresponse = (lbuttondown)
/ branch = [
    return trial.draw;
]
/ recorddata = false
</trial>

// does the actual drawing and waits for mouse button to be lifted
<trial draw>
/ stimulusframes = [1=exitbutton]
/ inputdevice = mouse
/ draw = pencil
/ validresponse = (lbuttonup)
/ undodraw = [
    false;
]
/branch = [
    trial.pause;
]
/ recorddata = false
</trial>

// waits for mouse button to be pressed again to continue drawing or click on exit to end drawing
<trial pause>
/ stimulusframes = [1=exitbutton]
/inputdevice = mouse
/showmousecursor = true
/validresponse = (exitbutton, surface)
/ branch = [
    if (trial.pause.response != "exitbutton") {
        return trial.draw;
    } else {
        return trial.end;
    };
]
/ recorddata = false
</trial>

// takes a screen capture of the end result
<trial end>
/ trialduration = 20
/ screencapture = true
</trial>

<text example_stimulus>
/ items = ("Start drawing by pressing the left mouse button, pause by releasing the left mouse button.
When you are done drawing, click the exit button.")
/ erase = false
/ size = (80%, 80%)
/ txbgcolor = antiquewhite
</text>

<shape surface>
/ shape = rectangle
/ size = (100%, 100%)
/ erase = false
/ color = white
</shape>

<shape pencil>
/ shape = circle
/ color = black
/ size = (.5%, .5%)
/ erase = false
</shape>

<button exitbutton>
/ caption = "EXIT"
/ size = (5%, 4%)
/ position = (50%, 95%)
/ erase = false
</button>

Thank you very much for this help.
This solves it very well.

+x

 

Dave - 12/2/2022

+x

 

JoeMunro - 12/2/2022

+x

 

Dave - 12/2/2022

+x

 

JoeMunro - 12/2/2022

Hi,

I am looking to draw to the screen, which I can do with the draw attribute of the trial,
But is there a way to only draw when the mosue is held down? So don't draw, hold down mouse to draw, mouse up don't draw.
This is my current code to draw:

<trial draw>
/ stimulusframes = [1 = imagesBW]
/ inputdevice = keyboard
/ validresponse = (" ")
/ draw = brush
/ screencapture = true
</trial>

Any help or if it's not possible would be great.
Joe

You would have to do something like this:

<block example>
/ trials = [1=start]
</block>

// waits for mouse button to be pressed
<trial start>
/ stimulusframes = [1=surface, example_stimulus]
/inputdevice = mouse
/showmousecursor = true
/validresponse = (lbuttondown)
/ branch = [
    return trial.draw;
]
/ recorddata = false
</trial>

// does the actual drawing and waits for mouse button to be lifted
<trial draw>
/ stimulusframes = [1=exitbutton]
/ inputdevice = mouse
/ draw = pencil
/ validresponse = (lbuttonup)
/ undodraw = [
    false;
]
/branch = [
    trial.pause;
]
/ recorddata = false
</trial>

// waits for mouse button to be pressed again to continue drawing or click on exit to end drawing
<trial pause>
/ stimulusframes = [1=exitbutton]
/inputdevice = mouse
/showmousecursor = true
/validresponse = (exitbutton, surface)
/ branch = [
    if (trial.pause.response != "exitbutton") {
        return trial.draw;
    } else {
        return trial.end;
    };
]
/ recorddata = false
</trial>

// takes a screen capture of the end result
<trial end>
/ trialduration = 20
/ screencapture = true
</trial>

<text example_stimulus>
/ items = ("Start drawing by pressing the left mouse button, pause by releasing the left mouse button.
When you are done drawing, click the exit button.")
/ erase = false
/ size = (80%, 80%)
/ txbgcolor = antiquewhite
</text>

<shape surface>
/ shape = rectangle
/ size = (100%, 100%)
/ erase = false
/ color = white
</shape>

<shape pencil>
/ shape = circle
/ color = black
/ size = (.5%, .5%)
/ erase = false
</shape>

<button exitbutton>
/ caption = "EXIT"
/ size = (5%, 4%)
/ position = (50%, 95%)
/ erase = false
</button>

Thank you very much for this help.
This solves it very well.

One addition: There is a little snag in that trial.pause will theoretically also accept a click with the right mouse button on either the exit button or the drawing surface. It's probably unlikely for anyone to actually do that, but if you want to avoid that possibility, we can instead define lbuttondown as the only allowable response in trial.pause and perform a point-in-rectangle test to check whether the left click occurred on the exit button or not:

<defaults>
/ canvasaspectratio = (4,3)
</defaults>

<block example>
/ trials = [1=start]
</block>

// waits for mouse button to be pressed
<trial start>
/ stimulusframes = [1=example_stimulus]
/inputdevice = mouse
/showmousecursor = true
/validresponse = (lbuttondown)
/ branch = [
    return trial.draw;
]
/ recorddata = false
</trial>

// does the actual drawing and waits for mouse button to be lifted
<trial draw>
/ stimulusframes = [1=exitbutton]
/ inputdevice = mouse
/ draw = pencil
/ validresponse = (lbuttonup)
/ undodraw = [
    false;
]
/branch = [
    trial.pause;
]
/ recorddata = false
</trial>

// waits for mouse button to be pressed again to continue drawing or click on exit to end drawing
<trial pause>
/ stimulusframes = [1=exitbutton]
/inputdevice = mouse
/showmousecursor = true
/ validresponse = (lbuttondown)
/ branch = [
    // check if we clicked the exit button or not
    if (mouse.x >= (button.exitbutton.xpx - button.exitbutton.widthpx/2) && mouse.x <= (button.exitbutton.xpx + button.exitbutton.widthpx/2) && mouse.y >= (button.exitbutton.ypx - button.exitbutton.heightpx/2) && mouse.y <= (button.exitbutton.ypx + button.exitbutton.heightpx/2)) {
        return trial.end;
    } else {
        return trial.draw;
    };
]
/ recorddata = false
</trial>

// takes a screen capture of the end result
<trial end>
/ trialduration = 20
/ screencapture = true
</trial>

<text example_stimulus>
/ items = ("Start drawing by pressing the left mouse button, pause by releasing the left mouse button.
When you are done drawing, click the exit button.")
/ erase = false
/ size = (80%, 80%)
/ txbgcolor = antiquewhite
</text>

<shape surface>
/ shape = rectangle
/ size = (100%, 100%)
/ erase = false
/ color = white
</shape>

<shape pencil>
/ shape = circle
/ color = black
/ size = (.5%, .5%)
/ erase = false
</shape>

<button exitbutton>
/ caption = "EXIT"
/ size = (5%, 4%)
/ position = (50%, 95%)
/ erase = false
</button>