pixel-editor/js/_tools.js

105 lines
3.3 KiB
JavaScript

// REFACTOR: this is a nice base for the Tool class
//tools container / list, automatically managed when you create a new Tool();
var tool = {};
//class for tools
class Tool {
constructor (name, options) {
//stores the name in object, only needed for legacy functions from when currentTool was just a string
this.name = name;
//copy options to this object
if (options.cursor) {
//passed statically as a string
if (typeof options.cursor == 'string') this.cursor = options.cursor;
//passed a function which should be used as a getter function
if (typeof options.cursor == 'function') Object.defineProperty(this, 'cursor', { get: options.cursor});
}
if (options.imageCursor) this.cursor = "url(\'/pixel-editor/"+options.imageCursor+".png\'), auto";
this.currentBrushSize = 1;
this.previousBrushSize = 1;
if (options.brushPreview) {
this.brushPreview = true;
}
//add to tool object so it can be referenced
tool[name] = this;
}
get brushSize () {
return this.currentBrushSize;
}
set brushSize (value) {
this.currentBrushSize = value;
this.updateCursor();
}
//switch to this tool (replaced global changeTool())
switchTo () {
// Ending any selection in progress
if (currentTool.name.includes("select") && !this.name.includes("select") && !selectionCanceled) {
endSelection();
}
//set tool and temp tje tje tpp <--- he's speaking the language of the gods, don't delete
currentTool = this;
currentToolTemp = this;
var tools = document.getElementById("tools-menu").children;
for (var i = 0; i < tools.length; i++) {
tools[i].classList.remove("selected");
}
let buttonNode = document.getElementById(this.name + "-button");
//give the button of the selected tool the .selected class if the tool has a button
if(buttonNode != null && buttonNode.parentNode != null) {
document.getElementById(this.name+"-button").parentNode.classList.add("selected");
}
//change cursor
this.updateCursor();
}
updateCursor () {
//switch to that tools cursor
canvasView.style.cursor = this.cursor || 'default';
//if the tool uses a brush preview, make it visible and update the size
if (this.brushPreview) {
//console.log('brush size',this.currentBrushSize)
brushPreview.style.display = 'block';
brushPreview.style.width = this.currentBrushSize * zoom + 'px';
brushPreview.style.height = this.currentBrushSize * zoom + 'px';
}
//moveSelection
if (currentTool.name == 'moveselection') {
if (cursorInSelectedArea()) {
canMoveSelection = true;
canvasView.style.cursor = 'move';
brushPreview.style.display = 'none';
}
else {
canvasView.style.cursor = 'crosshair';
}
}
}
moveBrushPreview(cursorLocation) {
let toSub = 1;
// Prevents the brush to be put in the middle of pixels
if (this.currentBrushSize % 2 == 0) {
toSub = 0.5;
}
brushPreview.style.left = (Math.floor(cursorLocation[0] / zoom) * zoom + currentLayer.canvas.offsetLeft - this.currentBrushSize * zoom / 2 - zoom / 2 + toSub * zoom) + 'px';
brushPreview.style.top = (Math.floor(cursorLocation[1] / zoom) * zoom + currentLayer.canvas.offsetTop - this.currentBrushSize * zoom / 2 - zoom / 2 + toSub * zoom) + 'px';
}
}
/*global dragging currentTool, currentToolTemp, selectionCanceled, endSelection*/