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    ./demo/canvas-001.js ./demo/canvas-002.js ./demo/canvas-003.js ./demo/canvas-004.js ./demo/canvas-005.js ./demo/canvas-006.js ./demo/canvas-007.js ./demo/canvas-008.js ./demo/canvas-009.js ./demo/canvas-010.js ./demo/canvas-011.js ./demo/canvas-012.js ./demo/canvas-013.js ./demo/canvas-014.js ./demo/canvas-015.js ./demo/canvas-016.js ./demo/canvas-017.js ./demo/canvas-018.js ./demo/canvas-019.js ./demo/canvas-020.js ./demo/canvas-021.js ./demo/canvas-022.js ./demo/canvas-023.js ./demo/canvas-024.js ./demo/canvas-025.js ./demo/canvas-026.js ./demo/canvas-027.js ./demo/canvas-028.js ./demo/canvas-029.js ./demo/canvas-030.js ./demo/canvas-031.js ./demo/canvas-032.js ./demo/canvas-033.js ./demo/canvas-034.js ./demo/canvas-035.js ./demo/canvas-036.js ./demo/canvas-037.js ./demo/canvas-038.js ./demo/canvas-039.js ./demo/canvas-040.js ./demo/canvas-041.js ./demo/canvas-042.js ./demo/canvas-043.js ./demo/canvas-044.js ./demo/canvas-045.js ./demo/canvas-046.js ./demo/canvas-047.js ./demo/component-001.js ./demo/component-002.js ./demo/component-003.js ./demo/component-004.js ./demo/component-005.js ./demo/component-006.js ./demo/component-007.js ./demo/core-001.js ./demo/dom-001.js ./demo/dom-002.js ./demo/dom-003.js ./demo/dom-004.js ./demo/dom-005.js ./demo/dom-006.js ./demo/dom-007.js ./demo/dom-008.js ./demo/dom-009.js ./demo/dom-010.js ./demo/dom-011.js ./demo/dom-012.js ./demo/dom-013.js ./demo/dom-014a.js ./demo/dom-014b.js ./demo/dom-014c.js ./demo/dom-015.js ./demo/dom-016.js ./demo/filters-001.js ./demo/filters-002.js ./demo/filters-003.js ./demo/filters-004.js ./demo/filters-005.js ./demo/filters-006.js ./demo/filters-007.js ./demo/filters-008.js ./demo/filters-009.js ./demo/filters-010.js ./demo/filters-011.js ./demo/filters-012.js ./demo/filters-013.js ./demo/filters-014.js ./demo/filters-015.js ./demo/filters-016.js ./demo/filters-017.js ./demo/filters-018.js ./demo/filters-019.js ./demo/filters-020.js ./demo/filters-501.js ./demo/filters-502.js ./demo/filters-503.js ./demo/filters-504.js ./demo/filters-505.js ./demo/particles-001.js ./demo/particles-002.js ./demo/particles-003.js ./demo/particles-004.js ./demo/particles-005.js ./demo/particles-006.js ./demo/particles-007.js ./demo/particles-008.js ./demo/particles-009.js ./demo/particles-010.js ./demo/particles-011.js ./demo/particles-012.js ./demo/particles-013.js ./demo/particles-014.js ./demo/particles-015.js ./demo/particles-016.js ./demo/temp-001.js ./demo/temp-inkscapeSvgFilters.js
  • ¶

    Demo Canvas 039

    Detecting mouse/pointer cursor movements across a non-base Cell

  • ¶

    Run code

    import scrawl from '../source/scrawl.js';
  • ¶

    Scene setup

    const canvas = scrawl.library.canvas.mycanvas;
  • ¶

    Create a second cell for the canvas

    • This cell will act as a moveable layer (start, handle, offset, roll, flipUpend, flipReverse)
    • We will also add entitys to the new Cell, and create a drag zone on it so those entitys can be dragged and dropped across the Cell.
    const mycell = canvas.buildCell({
    
        name: 'test-cell',
    
        width: 600,
        height: 400,
    
        startX: 300,
        startY: 200,
    
        handleX: 300,
        handleY: 200,
    
        offsetX: 0,
        offsetY: 0,
    
        roll: 0,
        scale: 1,
    
        flipUpend: false,
        flipReverse: false,
    
        backgroundColor: 'lightblue',
    });
  • ¶

    Create the drag group

    scrawl.makeGroup({
    
        name: 'drag-group',
        host: 'test-cell'
    })
  • ¶

    Create draggable entitys

    scrawl.makeWheel({
    
        name: 'wheel-1',
        group: 'drag-group',
    
        radius: 40,
    
        start: [250, 150],
        handle: ['center', 'center'],
    
        fillStyle: 'red',
    
    }).clone({
    
        name: 'wheel-2',
        start: [250, 250],
        fillStyle: 'blue',
    
    }).clone({
    
        name: 'wheel-3',
        start: [350, 250],
        fillStyle: 'green',
    
    }).clone({
    
        name: 'wheel-4',
        start: [350, 150],
        fillStyle: 'yellow',
    });
    
    scrawl.makeBlock({
    
        name: 'block-1',
        group: 'test-cell',
    
        start: ['5%', '5%'],
        dimensions: ['90%', '90%'],
    
        lineWidth: 5,
        method: 'draw',
    })
    
    scrawl.makeWheel({
    
        name: 'mouse-wheel',
        group: 'test-cell',
    
        radius: 6,
        handle: ['center', 'center'],
    
        lockTo: 'mouse',
    });
  • ¶

    Scene animation

    Function to display frames-per-second data, and other information relevant to the demo

    let report = function () {
    
        let testTicker = Date.now(),
            testTime, testNow,
            testMessage = document.querySelector('#reportmessage');
    
        return function () {
    
            mycell.updateHere();
    
            testNow = Date.now();
            testTime = testNow - testTicker;
            testTicker = testNow;
    
            testMessage.textContent = `Screen refresh: ${Math.ceil(testTime)}ms; fps: ${Math.floor(1000 / testTime)}`;
        };
    }();
  • ¶

    Create the Display cycle animation

    const demoAnimation = scrawl.makeRender({
    
        name: "demo-animation",
        target: canvas,
        afterShow: report,
    });
  • ¶

    User interaction

    Create the drag-and-drop zone

    scrawl.makeDragZone({
    
        zone: canvas,
        collisionGroup: 'drag-group',
        coordinateSource: mycell,
        endOn: ['up', 'leave'],
    });
  • ¶

    Setup form observer functionality

    scrawl.observeAndUpdate({
    
        event: ['input', 'change'],
        origin: '.controlItem',
    
        target: mycell,
    
        useNativeListener: true,
        preventDefault: true,
    
        updates: {
    
            width: ['width', 'round'],
            height: ['height', 'round'],
    
            start_x: ['startX', 'round'],
            start_y: ['startY', 'round'],
    
            handle_x: ['handleX', 'round'],
            handle_y: ['handleY', 'round'],
    
            offset_x: ['offsetX', 'round'],
            offset_y: ['offsetY', 'round'],
    
            roll: ['roll', 'float'],
            scale: ['scale', 'float'],
    
            upend: ['flipUpend', 'boolean'],
            reverse: ['flipReverse', 'boolean'],
        },
    });
  • ¶

    Setup form

    document.querySelector('#start_x').value = 300;
    document.querySelector('#start_y').value = 200;
    document.querySelector('#handle_x').value = 300;
    document.querySelector('#handle_y').value = 200;
    document.querySelector('#offset_x').value = 0;
    document.querySelector('#offset_y').value = 0;
    document.querySelector('#roll').value = 0;
    document.querySelector('#scale').value = 1;
    document.querySelector('#upend').options.selectedIndex = 0;
    document.querySelector('#reverse').options.selectedIndex = 0;
    document.querySelector('#width').value = 600;
    document.querySelector('#height').value = 400;
  • ¶

    Development and testing

    console.log(scrawl.library);