mirror of https://github.com/espruino/BangleApps
114 lines
3.5 KiB
JavaScript
114 lines
3.5 KiB
JavaScript
const W = g.getWidth();
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const H = g.getHeight();
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const dispH = H/5;
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const butH = H-dispH;
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const buttons = [[['7', '8', '9'],
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['4', '5', '6'],
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['1', '2', '3'],
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['E', '0', '.']],
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[['<', 'M', 'C'],
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['+', '-', '*'],
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['/', '(', ')'],
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['^', ',', '=']],
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[['Sin', 'Cos', 'Tan'],
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['Asi', 'Aco', 'Ata'],
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['Pi', '1/x', '+/-'],
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['Log', 'Exp', 'Pow']
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]];
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var curPage = 0;
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var inputStr = '';
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var memory = '';
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var qResult = false;
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function drawPage (p) {
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g.clearRect(0, dispH, W-1, H-1);
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g.setFont('Vector', butH/5).setFontAlign(0, 0, 0).setColor(g.theme.fg);
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for (x=0; x<3; ++x)
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for (y=0; y<4; ++y)
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g.drawString(buttons[p][y][x], (x+0.5)*W/3, dispH+(y+0.7)*butH/4);
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g.setColor(0.5, 0.5, 0.5);
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for (x=1; x<3; ++x) g.drawLine(x*W/3, dispH+0.2*butH/4-2, x*W/3, H-1);
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for (y=1; y<4; ++y) g.drawLine(0, dispH+(y+0.2)*butH/4, W-1, dispH+(y+0.2)*butH/4);
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g.setColor(g.theme.fg).drawLine(0, dispH+0.2*butH/4-2, W-1, dispH+0.2*butH/4-2);
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}
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function updateDisp(s, len) {
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var fh = butH/5;
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if (s.toString().length>len) s = s.toString().substr(0,len);
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g.setFont("Vector", butH/5).setColor(g.theme.fg).setFontAlign(1, 0, 0);
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while (g.stringWidth(s) > W-1) {
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fh /= 1.05;
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g.setFont("Vector", fh);
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}
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g.clearRect(0, 0, W-1, dispH-1).drawString(s, W-2, dispH/2);
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g.setColor(g.theme.fg).drawLine(0, dispH+0.2*butH/4-2, W-1, dispH+0.2*butH/4-2);
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}
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function processInp (s) {
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var idx = s.indexOf("^");
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if (idx > 0) s = "Math.pow(" + s.slice(0,idx) + "," + s.slice(idx+1, s.length) + ")";
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['Sin', 'Cos', 'Tan', 'Asin', 'Acos', 'Atan', 'Log', 'Exp', 'Pow'].forEach((x) => {
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var i = s.indexOf(x);
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while (i>-1) {
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s = s.slice(0,i)+"Math."+s.slice(i,i+1).toLowerCase()+s.slice(i+1, s.length);
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i = s.indexOf(x, i+6);
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}
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});
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idx = s.indexOf('Pi');
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if (idx>-1) s = s.slice(0,idx) + "Math.PI" + s.slice(idx+2, s.length);
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idx = 0;
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s.split('').forEach((x)=>{ if (x=='(') idx++; if (x==')') idx-- });
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s += ')'.repeat(idx);
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return s;
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}
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function compute() {
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var res;
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console.log(processInp(inputStr));
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try { res = eval(processInp(inputStr)); }
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catch(e) { res = "error"; }
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inputStr = res;
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qResult = true;
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updateDisp(inputStr, 19);
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}
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function touchHandler(e, d) {
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var x = Math.floor(d.x/(W/3));
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var y = Math.floor((d.y-dispH-0.2*butH/4)/(butH/4));
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var c = buttons[curPage][y][x];
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if (c=="=") { // do the computation
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compute();
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return;
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}
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else if (c=="<" && inputStr.length>0) inputStr = inputStr.slice(0, -1); // delete last character
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else if (c=='M' && qResult) memory = inputStr;
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else if (c=='M') inputStr += memory;
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else if (c=="C") inputStr = ''; // clear
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else {
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if ("Sin Cos Tan Log Exp Pow".indexOf(c)>-1 && c!='E') c += "(";
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if ("Asi Aco Ata".indexOf(c)>-1) c += "n(";
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if (c=='1/x') { inputStr = "1/("+inputStr+")"; compute(); return; }
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if (c=='+/-') { inputStr = "-("+inputStr+")"; compute(); return; }
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if (qResult && "+-*/^".indexOf(c)==-1) inputStr = c + inputStr + ")";
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else inputStr += c;
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}
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qResult = false;
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updateDisp(inputStr, 32);
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}
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function swipeHandler(e,d) {
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curPage -= e;
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if (curPage>buttons.length-1) curPage = 0;
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if (curPage<0) curPage = buttons.length-1;
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drawPage(curPage);
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if (d==1) compute();
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}
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Bangle.on("touch", touchHandler);
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Bangle.on("swipe", swipeHandler);
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g.clear();
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drawPage(curPage);
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