piskel/js/piskel.js

334 lines
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JavaScript
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(function ($) {
var frameSheet,
// Constants:
TRANSPARENT_COLOR = 'tc',
//TRANSPARENT_COLOR = 'pink',
DEFAULT_PEN_COLOR = '#000',
// Configuration:
// Canvas size in pixel size (not dpi related)
framePixelWidth = 32,
framePixelHeight = 32,
// Scaling factors for a given frameSheet rendering:
// Main drawing area:
drawingCanvasDpi = 10,
// Canvas previous in the slideshow:
previewTileCanvasDpi = 4,
// Ainmated canvas preview:
previewAnimationCanvasDpi = 8,
// DOM references:
drawingAreaContainer,
drawingAreaCanvas,
previewCanvas,
// States:
isClicked = false,
isRightClicked = false,
activeFrameIndex = -1,
animIndex = 0,
penColor = DEFAULT_PEN_COLOR;
var piskel = {
init : function () {
frameSheet = FrameSheetModel.getInstance(framePixelWidth, framePixelHeight);
frameSheet.addEmptyFrame();
this.setActiveFrame(0);
this.initDrawingArea();
this.initPreviewSlideshow();
this.initAnimationPreview();
},
setActiveFrame: function(index) {
activeFrameIndex = index;
},
setActiveFrameAndRedraw: function(index) {
this.setActiveFrame(index);
// Update drawing canvas:
this.drawFrameToCanvas(frameSheet.getFrameByIndex(this.getActiveFrameIndex()), drawingAreaCanvas, drawingCanvasDpi);
// Update slideshow:
this.createPreviews();
// Update animation preview:
animIndex = 0;
},
getActiveFrameIndex: function() {
if(-1 == activeFrameIndex) {
throw "Bad active frane initialization."
}
return activeFrameIndex;
},
initDrawingArea : function() {
drawingAreaContainer = $('drawing-canvas-container');
drawingAreaCanvas = document.createElement("canvas");
drawingAreaCanvas.className = 'canvas';
drawingAreaCanvas.setAttribute('width', '' + framePixelWidth * drawingCanvasDpi);
drawingAreaCanvas.setAttribute('height', '' + framePixelHeight * drawingCanvasDpi);
drawingAreaContainer.setAttribute('style',
'width:' + framePixelWidth * drawingCanvasDpi + 'px; height:' + framePixelHeight * drawingCanvasDpi + 'px;');
drawingAreaCanvas.setAttribute('oncontextmenu', 'piskel.onCanvasContextMenu(arguments[0])');
drawingAreaContainer.appendChild(drawingAreaCanvas);
var body = document.getElementsByTagName('body')[0];
body.setAttribute('onmouseup', 'piskel.onCanvasMouseup(arguments[0])');
drawingAreaContainer.setAttribute('onmousedown', 'piskel.onCanvasMousedown(arguments[0])');
drawingAreaContainer.setAttribute('onmousemove', 'piskel.onCanvasMousemove(arguments[0])');
this.drawFrameToCanvas(frameSheet.getFrameByIndex(this.getActiveFrameIndex()), drawingAreaCanvas, drawingCanvasDpi);
},
initPreviewSlideshow: function() {
var addFrameButton = $('add-frame-button');
addFrameButton.addEventListener('mousedown', function() {
frameSheet.addEmptyFrame();
piskel.setActiveFrameAndRedraw(frameSheet.getFrameCount() - 1);
});
this.createPreviews();
},
initAnimationPreview : function() {
var scope = this;
var previewAnimationContainer = $('preview-canvas-container');
previewCanvas = document.createElement('canvas');
previewCanvas.className = 'canvas';
previewAnimationContainer.setAttribute('style',
'width:' + framePixelWidth * previewAnimationCanvasDpi + 'px; height:' + framePixelHeight * previewAnimationCanvasDpi + 'px;');
previewAnimationContainer.appendChild(previewCanvas);
previewCanvas.setAttribute('width', framePixelWidth * previewAnimationCanvasDpi);
previewCanvas.setAttribute('height', framePixelHeight * previewAnimationCanvasDpi);
var animFPSTuner = document.getElementById("preview-fps");
var animPreviewFPS = parseInt(animFPSTuner.value, 10);
var startPreviewRefresh = function() {
return setInterval(scope.refreshAnimatedPreview, 1000/animPreviewFPS);
};
var refreshUpdater = startPreviewRefresh();
animFPSTuner.addEventListener('keyup', function(evt) {
window.clearInterval(refreshUpdater);
animPreviewFPS = parseInt(animFPSTuner.value, 10);
if(isNaN(animPreviewFPS)) {
animPreviewFPS = 1;
}
if(evt.keyCode == 38) {
animPreviewFPS++;
}
else if (evt.keyCode == 40) {
animPreviewFPS--;
}
if(animPreviewFPS < 1) {
animPreviewFPS = 1;
}
if(animPreviewFPS > 100) {
animPreviewFPS = 100;
}
animFPSTuner.value = animPreviewFPS;
refreshUpdater = startPreviewRefresh();
});
},
createPreviews : function () {
var container = $('preview-list'), previewTile;
container.innerHTML = "";
for (var i = 0, l = frameSheet.getFrameCount(); i < l ; i++) {
previewTile = this.createPreviewTile(i);
container.appendChild(previewTile);
}
},
createPreviewTile: function(tileNumber) {
var previewTileRoot = document.createElement("li");
var classname = "preview-tile";
if (this.getActiveFrameIndex() == tileNumber) {
classname += " selected";
}
previewTileRoot.className = classname;
var canvasContainer = document.createElement("div");
canvasContainer.className = "canvas-container";
canvasContainer.setAttribute('style',
'width:' + framePixelWidth * previewTileCanvasDpi + 'px; height:' + framePixelHeight * previewTileCanvasDpi + 'px;');
var canvasBackground = document.createElement("div");
canvasBackground.className = "canvas-background";
canvasContainer.appendChild(canvasBackground);
var canvasPreview = document.createElement("canvas");
canvasPreview.className = "canvas tile-view"
canvasPreview.setAttribute('width', framePixelWidth * previewTileCanvasDpi);
canvasPreview.setAttribute('height', framePixelHeight * previewTileCanvasDpi);
previewTileRoot.addEventListener('click', function(evt) {
// has not class tile-action:
// TODO: let me know when you want to start using a framework :)
if(!evt.target.className.match(new RegExp('(\\s|^)'+ 'tile-action' +'(\\s|$)'))) {
piskel.setActiveFrameAndRedraw(tileNumber);
}
});
var canvasPreviewDuplicateAction = document.createElement("button");
canvasPreviewDuplicateAction.className = "tile-action"
canvasPreviewDuplicateAction.innerHTML = "dup"
canvasPreviewDuplicateAction.addEventListener('click', function(evt) {
piskel.duplicateFrame(tileNumber);
});
this.drawFrameToCanvas(frameSheet.getFrameByIndex(tileNumber), canvasPreview, previewTileCanvasDpi);
canvasContainer.appendChild(canvasPreview);
previewTileRoot.appendChild(canvasContainer);
previewTileRoot.appendChild(canvasPreviewDuplicateAction);
if(tileNumber > 0 || frameSheet.getFrameCount() > 1) {
var canvasPreviewDeleteAction = document.createElement("button");
canvasPreviewDeleteAction.className = "tile-action"
canvasPreviewDeleteAction.innerHTML = "del"
canvasPreviewDeleteAction.addEventListener('click', function(evt) {
frameSheet.removeFrameByIndex(tileNumber);
animIndex = 0;
piskel.createPreviews();
});
previewTileRoot.appendChild(canvasPreviewDeleteAction);
}
return previewTileRoot;
},
refreshAnimatedPreview : function () {
piskel.drawFrameToCanvas(frameSheet.getFrameByIndex(animIndex), previewCanvas, previewAnimationCanvasDpi);
animIndex++;
if (animIndex == frameSheet.getFrameCount()) {
animIndex = 0;
}
},
removeFrame: function(frameIndex) {
frameSheet.removeFrameByIndex(frameIndex);
this.setActiveFrameAndRedraw(frameIndex - 1);
},
duplicateFrame: function(frameIndex) {
frameSheet.duplicateFrameByIndex(frameIndex);
this.setActiveFrameAndRedraw(frameIndex + 1);
},
updateCursorInfo : function (event) {
var cursor = $('cursorInfo');
cursor.style.top = event.clientY + 10 + "px";
cursor.style.left = event.clientX + 10 + "px";
var coordinates = this.getRelativeCoordinates(event.clientX, event.clientY)
cursor.innerHTML = [
"X : " + coordinates.x,
"Y : " + coordinates.y
].join(", ");
},
onCanvasMousedown : function (event) {
isClicked = true;
var coords = this.getRelativeCoordinates(event.clientX, event.clientY);
if(event.button == 0) {
this.drawAt(coords.x, coords.y, penColor);
} else {
// Right click used to delete.
isRightClicked = true;
this.drawAt(coords.x, coords.y, TRANSPARENT_COLOR);
}
},
onCanvasMousemove : function (event) {
//this.updateCursorInfo(event);
if (isClicked) {
var coords = this.getRelativeCoordinates(event.clientX, event.clientY);
if(isRightClicked) {
this.drawAt(coords.x, coords.y, TRANSPARENT_COLOR);
} else {
this.drawAt(coords.x, coords.y, penColor);
}
}
},
onCanvasMouseup : function (event) {
if(isClicked || isRightClicked) {
// A mouse button was clicked on the drawing canvas before this mouseup event,
// the user was probably drawing on the canvas.
// Note: The mousemove movement (and the mouseup) may end up outside
// of the drawing canvas.
this.createPreviews();
}
isClicked = false;
isRightClicked = false;
},
drawAt : function (x, y, color) {
var pixelWidthIndex = (x - x%drawingCanvasDpi) / 10;
var pixelHeightIndex = (y - y%drawingCanvasDpi) / 10;
// Update model:
var currentFrame = frameSheet.getFrameByIndex(this.getActiveFrameIndex());
// TODO: make a better accessor for pixel state update:
// TODO: Make pen color dynamic:
currentFrame[pixelWidthIndex][pixelHeightIndex] = color;
// Update view:
// TODO: Create a per pixel update function for perf ?
this.drawFrameToCanvas(currentFrame, drawingAreaCanvas, drawingCanvasDpi);
},
// TODO: move that to a FrameRenderer (/w cache) ?
drawFrameToCanvas: function(frame, canvasElement, dpi) {
var pixelColor, context = canvasElement.getContext('2d');
for(var col = 0, num_col = frame.length; col < num_col; col++) {
for(var row = 0, num_row = frame[col].length; row < num_row; row++) {
pixelColor = frame[col][row];
if(pixelColor == undefined || pixelColor == TRANSPARENT_COLOR) {
context.clearRect(col * dpi, row * dpi, dpi, dpi);
} else {
context.fillStyle = pixelColor;
context.fillRect(col * dpi, row * dpi, dpi, dpi);
}
}
}
},
onCanvasContextMenu : function (event) {
event.preventDefault();
event.stopPropagation();
event.cancelBubble = true;
return false;
},
getRelativeCoordinates : function (x, y) {
var canvasRect = drawingAreaCanvas.getBoundingClientRect();
return {
x : x - canvasRect.left,
y : y - canvasRect.top
}
}
};
window.piskel = piskel;
piskel.init();
})(function(id){return document.getElementById(id)});