122 lines
3.0 KiB
JavaScript
122 lines
3.0 KiB
JavaScript
function newChartAspectRatio() {
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let thisObject = {
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aspectRatio: undefined,
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draw: draw,
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getContainer: getContainer,
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initialize: initialize
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};
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let container = newContainer();
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container.initialize();
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thisObject.container = container;
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thisObject.container.frame.width = 50;
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thisObject.container.frame.height = BOTTOM_SPACE_HEIGHT;
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container.frame.position.x = viewPort.visibleArea.topRight.x - thisObject.container.frame.width ;
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container.frame.position.y = viewPort.visibleArea.bottomLeft.y;
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container.isDraggeable = false;
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container.isClickeable = false;
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container.isWheeleable = true;
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thisObject.aspectRatio = {};
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const INITIAL_Y_ASPECT_RATIO = 5 / 10;
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const MIN_Y_ASPECT_RATIO = 1 / 10;
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const MAX_Y_ASPECT_RATIO = 10 / 10;
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thisObject.aspectRatio.x = 1;
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thisObject.aspectRatio.y = INITIAL_Y_ASPECT_RATIO;
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canDrawIcon = false;
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return thisObject;
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function initialize() {
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icon = new Image();
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icon.onload = onImageLoad;
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function onImageLoad() {
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canDrawIcon = true;
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}
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icon.src = "Images/Icons/chart-scale.png";
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thisObject.container.eventHandler.listenToEvent('Mouse Wheel', onMouseWheel);
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}
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function onMouseWheel(pDelta) {
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if (viewPort.isMinZoom() === false) { return; } // We only make this button to work at the min zoom level.
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if (pDelta < 0) {
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pDelta = -0.1;
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} else {
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pDelta = 0.1;
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}
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thisObject.aspectRatio.y = thisObject.aspectRatio.y + pDelta;
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thisObject.aspectRatio.y = Math.round(thisObject.aspectRatio.y * 100) / 100;
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if (thisObject.aspectRatio.y < MIN_Y_ASPECT_RATIO) {
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thisObject.aspectRatio.y = MIN_Y_ASPECT_RATIO;
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}
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if (thisObject.aspectRatio.y > MAX_Y_ASPECT_RATIO) {
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thisObject.aspectRatio.y = MAX_Y_ASPECT_RATIO;
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}
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thisObject.container.eventHandler.raiseEvent("Chart Aspect Ratio Changed", thisObject.aspectRatio);
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}
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function getContainer(point) {
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let container;
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/* First we check if this point is inside this object UI. */
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if (thisObject.container.frame.isThisPointHere(point, true) === true) {
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return this.container;
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} else {
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/* This point does not belong to this space. */
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return undefined;
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}
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}
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function draw() {
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thisObject.container.frame.draw(false, false);
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if (canDrawIcon === false) { return; }
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if (viewPort.isMinZoom() === false) { return; } // We only show this button at the min zoom level.
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let breakpointsHeight = 15;
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let imageHeight = 15;
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let imageWidth = 15;
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let imagePoint = {
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x: 10,
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y: thisObject.container.frame.height / 2 - imageHeight / 2 + breakpointsHeight
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};
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imagePoint = thisObject.container.frame.frameThisPoint(imagePoint);
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browserCanvasContext.drawImage(icon, imagePoint.x, imagePoint.y, imageWidth, imageHeight);
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}
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} |