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Java Source | 1996-08-14 | 11.4 KB | 284 lines |
- //****************************************************************************
- // ---- version information ----
- //
- // ControlPanel.java v 1.00 b1
- // Written by: I. van Rienen / E-mail ivr@bart.nl
- // URL: http://www/bart.nl/~ivr
- // Initial release:
- // Released in public domain:
- //
- // ---- Description ----
- // Java class containing methods for a creating and maintaining the
- // Controlpanel which contaings the imagebuttons
- //
- // This program and the Java source is in the public domain.
- // Permission to use, copy, modify, and distribute this software
- // and its documentation for NON-COMMERCIAL purposes and
- // without fee is hereby granted.
- //
- // Copyright 1996
- //
- // Iwan van Rienen
- // Joan Maetsuyckerstr. 145
- // 2593 ZG The Hague
- // The Netherlands
- //
- // I am not responsible for any bugs in this program and
- // possible damage to hard- or software when using this program.
- //****************************************************************************
- import java.awt.*;
- import java.awt.image.*;
- import java.util.Vector;
-
- class ControlPanel extends Canvas {
-
- Vector buttons;
- DigSim applet;
- Image ImageBuffer = null;
- Image CopyImage = null;
- Graphics cig;
- int ButtonOffset = 0;
- ImageButton PressedButton = null;
- boolean ImageButtonsDisabled = false;
-
- //----------------------------------------------------------------------------
- // The constructor of the control panel.
- //----------------------------------------------------------------------------
- public ControlPanel(DigSim app) {
- applet = app;
- buttons = new Vector();
- LoadButtonsImage();
- buttons.addElement (new ImageButton ("New", 0));
- buttons.addElement (new ImageButton ("Open", 24));
- buttons.addElement (new ImageButton ("Save", 48));
- buttons.addElement (new ImageButton ("Cut", 80));
- buttons.addElement (new ImageButton ("Copy", 104));
- buttons.addElement (new ImageButton ("Paste", 128));
- buttons.addElement (new ImageButton ("Pointer", 160));
- buttons.addElement (new ImageButton ("Wire", 184));
- buttons.addElement (new ImageButton ("Junction", 208));
- buttons.addElement (new ImageButton ("Text", 232));
- buttons.addElement (new ImageButton ("Simulate", 264));
- buttons.addElement (new ImageButton ("Help", 296));
- if (ImageButtonsDisabled) {
- resize (size().width, 36);
- } else {
- resize (size().width, 4);
- }
- }
-
- //----------------------------------------------------------------------------
- // Calculate the preferred size of the control panel
- //----------------------------------------------------------------------------
- public Dimension preferredSize() {
- // System.out.println ("ControlPanel preferredSize()");
- int w = applet.size().width;
- if (ImageButtonsDisabled) {
- return new Dimension(w, 4);
- }
- return new Dimension(w, 36);
- }
-
- //----------------------------------------------------------------------------
- // Get the imagebutton with the specified Name
- //----------------------------------------------------------------------------
- public ImageButton getButton(String Name) {
- ImageButton TempButton;
-
- for (int ix = 0; ix < buttons.size(); ix++) {
- TempButton = (ImageButton) buttons.elementAt(ix);
- if (TempButton.getName().equals(Name)) {
- return TempButton;
- }
- }
- return null;
- }
-
- //----------------------------------------------------------------------------
- // Enable the button with the specified name
- //----------------------------------------------------------------------------
- public void EnableButton(String Name) {
- ImageButton TempButton = getButton (Name);
- if (TempButton != null) TempButton.Enable();
- repaint();
- }
-
- //----------------------------------------------------------------------------
- // Disable the button with the specified name
- //----------------------------------------------------------------------------
- public void DisableButton(String Name) {
- ImageButton TempButton = getButton (Name);
- if (TempButton != null) TempButton.Disable();
- repaint();
- }
-
- //----------------------------------------------------------------------------
- // Select the button with the specified name
- //----------------------------------------------------------------------------
- public void SelectButton(String Name) {
- ImageButton TempButton = getButton (Name);
- if (TempButton != null) TempButton.Select();
- repaint();
- }
-
- //----------------------------------------------------------------------------
- // Unselect the button with the specified name
- //----------------------------------------------------------------------------
- public void UnselectButton(String Name) {
- ImageButton TempButton = getButton (Name);
- if (TempButton != null) TempButton.Unselect();
- repaint();
- }
-
- //----------------------------------------------------------------------------
- // Enable all buttons in the control panel
- //----------------------------------------------------------------------------
- public void EnableAllButtons() {
- EnableButton("Pointer");
- EnableButton("Wire");
- EnableButton("Junction");
- EnableButton("Text");
- EnableButton("Help");
- EnableButton("Simulate");
- EnableButton("New");
- if (applet.EnableFileOperations) {
- EnableButton("Open");
- EnableButton("Save");
- }
- SelectButton("Pointer");
- }
-
- //----------------------------------------------------------------------------
- // Draw all imagebuttons
- //----------------------------------------------------------------------------
- public void DrawButtons(Graphics g) {
- ButtonOffset = (size().width - CopyImage.getWidth(this) ) / 2; // Center buttons
- ImageButton TempButton;
-
- for (int ix = 0; ix < buttons.size(); ix++) {
- TempButton = (ImageButton) buttons.elementAt(ix);
- TempButton.Draw(cig);
- }
-
- Graphics ibg = ImageBuffer.getGraphics();
- ibg.drawImage (CopyImage, 0, 0, this);
- g.drawImage(ImageBuffer, ButtonOffset, 4, this);
- }
-
- //----------------------------------------------------------------------------
- // The user pressed a mouse button
- //----------------------------------------------------------------------------
- public boolean mouseDown(Event event, int x, int y) {
- ImageButton TempButton;
- x -= ButtonOffset;
- y -= 4;
-
- for (int ix = 0; ix < buttons.size(); ix++) {
- TempButton = (ImageButton) buttons.elementAt(ix);
- if (TempButton.CheckIfPressed (x, y)) {
- PressedButton = TempButton;
- repaint();
- return true;
- }
- }
- return true;
- }
-
- //----------------------------------------------------------------------------
- // The user released a mouse button
- //----------------------------------------------------------------------------
- public boolean mouseUp(Event event, int x, int y) {
- if (PressedButton != null) {
- PressedButton.Select();
- repaint();
- ButtonPressed(PressedButton.getName());
- PressedButton = null;
- }
- return true;
- }
-
- //----------------------------------------------------------------------------
- // Draw a new off-screen image and copy it to the screen
- //----------------------------------------------------------------------------
- public synchronized void update (Graphics g) {
- g.setColor (Color.gray);
- g.drawLine (0, 0, size().width, 0);
- if (!ImageButtonsDisabled) g.drawLine (0, 30, size().width, 30);
- g.setColor (Color.white);
- g.drawLine (0, 1, size().width, 1);
- if (!ImageButtonsDisabled) g.drawLine (0, 31, size().width, 31);
-
- if (CopyImage != null && !ImageButtonsDisabled) DrawButtons(g);
- }
-
- //----------------------------------------------------------------------------
- // Draw a new off-screen image and copy it to the screen
- //----------------------------------------------------------------------------
- public synchronized void paint (Graphics g) {
- update (g);
- }
-
- //----------------------------------------------------------------------------
- // Load the master image containing all image buttons
- //----------------------------------------------------------------------------
- public void LoadButtonsImage() {
- Image ButtonsImage;
- MediaTracker tracker = new MediaTracker(this);
- ButtonsImage = applet.getImage(applet.getDocumentBase(), "images/allbuttons.gif");
- tracker.addImage(ButtonsImage, 0);
-
- try {
- Thread.currentThread().setPriority(Thread.MIN_PRIORITY);
- tracker.waitForAll();
- } catch(Exception e) {
- String message = e.toString();
- String DlgButtons[] = { "OK" };
- SimpleDialog ExceptionDialog = new SimpleDialog(null, "Reading imagebuttons", message, DlgButtons, 1, 0, 0, SimpleDialog.IMAGE_STOP);
- return;
- }
- if (tracker.isErrorAny()) {
- ImageButtonsDisabled = true;
- String message = "Can't read images/allbuttons.gif ImageButtons will be disabled";
- String DlgButtons[] = { "OK" };
- SimpleDialog ErrorDialog = new SimpleDialog(null, "Error while reading imagebuttons", message, DlgButtons, 1, 0, 0, SimpleDialog.IMAGE_STOP);
- return;
- }
- ImageBuffer = applet.createImage (ButtonsImage.getWidth(this), 24);
- CopyImage = applet.createImage (ButtonsImage.getWidth(this), ButtonsImage.getHeight(this));
- cig = CopyImage.getGraphics();
- cig.drawImage (ButtonsImage, 0, 0, this);
- }
-
- //----------------------------------------------------------------------------
- // The user pressed a button.
- //----------------------------------------------------------------------------
- public void ButtonPressed(String PressedButton) {
- if (ImageButtonsDisabled) return;
-
- if (PressedButton.equals("Pointer")) {
- applet.UserWantsPointer();
- } else if (PressedButton.equals("Wire")) {
- applet.UserWantsWireDrawing();
- } else if (PressedButton.equals("Junction")) {
- applet.UserWantsJunctionDrawing();
- } else if (PressedButton.equals("Text")) {
- applet.UserWantsTextDrawing();
- } else if (PressedButton.equals("Help")) {
- applet.UserWantsHelp();
- } else if (PressedButton.equals("Simulate")) {
- applet.UserWantsSimulate();
- } else if (PressedButton.equals("New")) {
- applet.UserWantsNewSchematic();
- } else if (PressedButton.equals("Open")) {
- applet.UserWantsOpenSchematic();
- } else if (PressedButton.equals("Save")) {
- applet.UserWantsSaveSchematic();
- } else if (PressedButton.equals("Copy")) {
- applet.UserWantsCopySchematic();
- } else if (PressedButton.equals("Paste")) {
- applet.UserWantsPasteSchematic();
- } else if (PressedButton.equals("Cut")) {
- applet.UserWantsCutSchematic();
- }
- }
- }