Java tutorial
/* Copyright (C) Paul Falstad and Iain Sharp This file is part of CircuitJS1. CircuitJS1 is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version. CircuitJS1 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with CircuitJS1. If not, see <http://www.gnu.org/licenses/>. */ package com.lushprojects.circuitjs1.client; import com.google.gwt.user.client.ui.DialogBox; import com.google.gwt.user.client.ui.HTML; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.VerticalPanel; import com.google.gwt.user.client.ui.HorizontalPanel; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.TextBox; import com.google.gwt.i18n.client.NumberFormat; import com.google.gwt.event.dom.client.ChangeHandler; import com.google.gwt.event.dom.client.ChangeEvent; import com.google.gwt.event.logical.shared.ValueChangeHandler; import com.google.gwt.event.logical.shared.ValueChangeEvent; import com.google.gwt.event.shared.GwtEvent; import com.google.gwt.user.client.ui.HasHorizontalAlignment; //import java.awt.*; //import java.awt.event.*; //import java.text.NumberFormat; //import java.text.DecimalFormat; interface Editable { EditInfo getEditInfo(int n); void setEditValue(int n, EditInfo ei); } // class EditDialog extends Dialog implements AdjustmentListener, ActionListener, ItemListener { class EditDialog extends DialogBox { Editable elm; CirSim cframe; Button applyButton, okButton, cancelButton; EditInfo einfos[]; int einfocount; final int barmax = 1000; VerticalPanel vp; HorizontalPanel hp; NumberFormat noCommaFormat; EditDialog(Editable ce, CirSim f) { // super(f, "Edit Component", false); super(); // Do we need this? setText(CirSim.LS("Edit Component")); cframe = f; elm = ce; // setLayout(new EditDialogLayout()); vp = new VerticalPanel(); setWidget(vp); einfos = new EditInfo[10]; noCommaFormat = NumberFormat.getFormat("####.##########"); // noCommaFormat = DecimalFormat.getInstance(); // noCommaFormat.setMaximumFractionDigits(10); // noCommaFormat.setGroupingUsed(false); hp = new HorizontalPanel(); hp.setWidth("100%"); hp.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT); hp.setStyleName("topSpace"); vp.add(hp); hp.add(applyButton = new Button(CirSim.LS("Apply"))); applyButton.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { apply(); } }); hp.add(okButton = new Button(CirSim.LS("OK"))); okButton.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { apply(); closeDialog(); } }); hp.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_RIGHT); hp.add(cancelButton = new Button(CirSim.LS("Cancel"))); cancelButton.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { closeDialog(); } }); buildDialog(); this.center(); } void buildDialog() { int i; int idx; for (i = 0;; i++) { Label l = null; einfos[i] = elm.getEditInfo(i); if (einfos[i] == null) break; EditInfo ei = einfos[i]; idx = vp.getWidgetIndex(hp); String name = CirSim.LS(ei.name); if (ei.name.startsWith("<")) vp.insert(l = new HTML(name), idx); else vp.insert(l = new Label(name), idx); if (i != 0 && l != null) l.setStyleName("topSpace"); idx = vp.getWidgetIndex(hp); if (ei.choice != null) { vp.insert(ei.choice, idx); ei.choice.addChangeHandler(new ChangeHandler() { public void onChange(ChangeEvent e) { itemStateChanged(e); } }); } else if (ei.checkbox != null) { vp.insert(ei.checkbox, idx); ei.checkbox.addValueChangeHandler(new ValueChangeHandler<Boolean>() { public void onValueChange(ValueChangeEvent<Boolean> e) { itemStateChanged(e); } }); } else if (ei.button != null) { vp.insert(ei.button, idx); ei.button.addClickHandler(new ClickHandler() { public void onClick(ClickEvent event) { itemStateChanged(event); } }); } else if (ei.textArea != null) { vp.insert(ei.textArea, idx); } else if (ei.anchor != null) { vp.insert(ei.anchor, idx); } else { vp.insert(ei.textf = new TextBox(), idx); if (ei.text != null) ei.textf.setText(ei.text); if (ei.text == null) { ei.textf.setText(unitString(ei)); } } } einfocount = i; } static final double ROOT2 = 1.41421356237309504880; double diffFromInteger(double x) { return Math.abs(x - Math.round(x)); } String unitString(EditInfo ei) { // for voltage elements, express values in rms if that would be shorter if (elm != null && elm instanceof VoltageElm && Math.abs(ei.value) > 1e-4 && diffFromInteger(ei.value * 1e4) > diffFromInteger(ei.value * 1e4 / ROOT2)) return unitString(ei, ei.value / ROOT2) + "rms"; return unitString(ei, ei.value); } String unitString(EditInfo ei, double v) { double va = Math.abs(v); if (ei.dimensionless) return noCommaFormat.format(v); if (v == 0) return "0"; if (va < 1e-9) return noCommaFormat.format(v * 1e12) + "p"; if (va < 1e-6) return noCommaFormat.format(v * 1e9) + "n"; if (va < 1e-3) return noCommaFormat.format(v * 1e6) + "u"; if (va < 1 && !ei.forceLargeM) return noCommaFormat.format(v * 1e3) + "m"; if (va < 1e3) return noCommaFormat.format(v); if (va < 1e6) return noCommaFormat.format(v * 1e-3) + "k"; if (va < 1e9) return noCommaFormat.format(v * 1e-6) + "M"; return noCommaFormat.format(v * 1e-9) + "G"; } double parseUnits(EditInfo ei) throws java.text.ParseException { String s = ei.textf.getText(); s = s.trim(); double rmsMult = 1; if (s.endsWith("rms")) { s = s.substring(0, s.length() - 3).trim(); rmsMult = ROOT2; } // rewrite shorthand (eg "2k2") in to normal format (eg 2.2k) using regex s = s.replaceAll("([0-9]+)([pPnNuUmMkKgG])([0-9]+)", "$1.$3$2"); int len = s.length(); char uc = s.charAt(len - 1); double mult = 1; switch (uc) { case 'p': case 'P': mult = 1e-12; break; case 'n': case 'N': mult = 1e-9; break; case 'u': case 'U': mult = 1e-6; break; // for ohm values, we assume mega for lowercase m, otherwise milli case 'm': mult = (ei.forceLargeM) ? 1e6 : 1e-3; break; case 'k': case 'K': mult = 1e3; break; case 'M': mult = 1e6; break; case 'G': case 'g': mult = 1e9; break; } if (mult != 1) s = s.substring(0, len - 1).trim(); return noCommaFormat.parse(s) * mult * rmsMult; } void apply() { int i; for (i = 0; i != einfocount; i++) { EditInfo ei = einfos[i]; if (ei.textf != null && ei.text == null) { try { double d = parseUnits(ei); ei.value = d; } catch (Exception ex) { /* ignored */ } } if (ei.button != null) continue; elm.setEditValue(i, ei); } cframe.needAnalyze(); } public void itemStateChanged(GwtEvent e) { Object src = e.getSource(); int i; boolean changed = false; for (i = 0; i != einfocount; i++) { EditInfo ei = einfos[i]; if (ei.choice == src || ei.checkbox == src || ei.button == src) { // if we're pressing a button, make sure to apply changes first if (ei.button == src) apply(); elm.setEditValue(i, ei); if (ei.newDialog) changed = true; cframe.needAnalyze(); } } if (changed) { clearDialog(); buildDialog(); } } public void clearDialog() { while (vp.getWidget(0) != hp) vp.remove(0); } protected void closeDialog() { EditDialog.this.hide(); cframe.editDialog = null; } }