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CSS

              
                
              
            
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JS

              
                // use the default "full" mode - not the "fit" mode many of the codepens use
// full mode makes a full window stage without any automatic scaling 
// the objects then must be manually scaled in the Frame's resize event
const frame = new Frame({color:darker, outerColor:darker});
frame.on("ready", ()=>{ 
	zog("ready from ZIM Frame"); // logs in console (F12 - choose console)

	// often need below - so consider it part of the template
	// use let because they get rewritten in resize event
	let stage = frame.stage;
	let stageW = frame.width;
	let stageH = frame.height;

	/// REFERENCES for ZIM at https://zimjs.com
	// see https://zimjs.com/intro.html for an intro example
	// see https://zimjs.com/learn.html for video and code tutorials
	// see https://zimjs.com/docs.html for documentation

	// CODE HERE

	// this is basic responsive using percentages of the stageW and stageH 
	// these can be used with scaleTo(), sca(), pos()
	// or properties (but without chaining) scale, scaleX, scaleY, x, y
	// There will be more advanced examples using the ZIM Layout() class as well

	// use a grid to help visualize percentages - see docs for more options
	const grid = new Grid({color:dark}); // or put last to go on top

	// make assets to scale
	const circle = new Circle(60, red);
	const label = new Label({text:"1", size:50, color:white, align:"center", valign:"center"}).centerReg(circle);

	const title = new Label({
		text:"ZIM - Responsive Canvas: min max scale - press to toggle",
		color:white
	}).alp(.5).addTo();

	// mousedown on the stage:
	// here we have provided a way to toggle the the grid
	// normally, as you build you would put the grid in to see what is happening 
	// and then comment it out or remove it when done 
	// so all this code is really just for this demonstration
	// note we use "stagemousedown" to capture a mousedown anywhere on the stage 
	// there is just "mousedown" which only captures events on any object on the stage 
	stage.on("stagemousedown", ()=>{
		if (stage.contains(grid)) {
			grid.removeFrom();
		} else {
			grid.addTo(stage, 0);
		}
		resize();
		stage.update();
	});	

	// here is the frame resize event (same as window.addEventListener("resize", ()=>{}))
	frame.on("resize", resize);
	function resize() {
		// grab the new stage width and height
		stageW = frame.width;
		stageH = frame.height;

		// scaleTo defaults to scale to the "smallest" of 60% height or 60% width
		// can also scale to the "largest" or "both" - this last one would stretch the object
		circle.scaleTo(stage, 60, 60);

		// sca() will set a scale (or sca(scaleX, scaleY) or scale or scaleX, scaleY)
		// scale will retrieve a scale (or scaleX, scaleY)
		// constrain(num, min, max, negative)
		circle.sca(constrain(circle.scale, 1, 2)).center();

		// decimals(num, places, addZeros, includeZero, time)
		label.text = decimals(circle.scale);

		// scale the title to 50% the width 
		// position title at 5% margin left and top
		title.scaleTo(stage, 50);
		title.pos(stageW*.05, stageH*.05); // can also do CENTER, RIGHT and BOTTOM as next params
		grid.resize();
	}


	stage.update(); // this is needed to show any changes

	// DOCS FOR ITEMS USED
	// http://zimjs.com/docs.html?item=grid
	// http://zimjs.com/docs.html?item=circle
	// http://zimjs.com/docs.html?item=center
	// http://zimjs.com/docs.html?item=scaleTo
	// http://zimjs.com/docs.html?item=sca
	// http://zimjs.com/docs.html?item=pos
	// http://zimjs.com/docs.html?item=addTo
	// http://zimjs.com/docs.html?item=frame  
   
}); // end of ready
              
            
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