Creating Multiple Frames (Windows) that Work Under a Single Frame

Question:
I am attempting to implement an applet that needs multipleframes (windows) that all belong or work under a single frame ? sort oflike an MDI application. However, each of the windows will differfrom each other in size, shape, components, etc. An example might beSymantec’s Cafe IDE for Java with the different windows for the Project,Output and Editor, all working under a single frame.

Is there a way to do this in Java?

Currently, while I can easily create popup windows or frames, they don’twork within a single parent frame, and other application windows can getintertwined within my applet window. I also don’t want to make each childwindow modal.

Answer:
If I understand your problem, I think you need to create your own class of”frames” extending the FramedPanel class defined below. Unlikeframes, panels are confined within their parent applet or frame. You candynamically create, resize, move and destroy panels, and because panels arecontainers, you can fill them up with components.

My PanFrame applet allows users to create, destroy, move,and reshape FramedPanels with the mouse. (Unfortunately,mouse events aren’t reported to frames on my Mac, soPanFrame needs to be an extension of Applet.)I realize I got a little carried away with handling mouse events. Isuppose you would need to add your own mouse handlers inside yourextension of FramedPanel to intercept mouse events and makethem do something useful in the context of your panels.

*/import java.awt.*;import java.applet.*;class FramedPanel extends Panel {   // I stole this code from the Java Tutorial!   //Ensure that no Component is placed on top of the frame.   //The inset values were determined by trial and error.   public Insets insets() {      return new Insets(4,4,5,5);   }   //Draw the frame at this Panel’s edges.   public void paint(Graphics g) {      Dimension d = size();      g.setColor(Color.black);      g.draw3DRect(0, 0, d.width – 1, d.height – 1, true);      g.draw3DRect(3,3, d.width – 7, d.height – 7, false);   }}public class PanFrame extends Applet {  private FramedPanel[] panels;  // all panels in the applet  private int MAX_PANELS = 10,              PANEL_COUNT = 0,              current = -1;  private boolean MOVING = false;  // = moving or resizing a panel  public boolean mouseDown(Event e, int x, int y) {     //setCursor(Frame.CROSSHAIR_CURSOR); a frame method 🙁     current = findPanel(x, y);  // = panel selected     if (current < 0)        addPanel(x, y);   // no panel selected, so create one     else if (e.clickCount >= 2)        removePanel(current);  // double click, so remove selected panel      return true;  }  // move or reshape selected panel  public boolean mouseDrag(Event e, int x, int y) {     if (current >= 0)        if (MOVING)           panels[current].move(x, y);  // move selected panel        else {           Point p = panels[current].location();           panels[current].reshape(p.x, p.y, x, y);  // reshape selected panel        }     // repaint();     return true;  }  // deselect selected panel  public boolean mouseUp(Event e, int x, int y) {        //setCursor(Frame.DEFAULT_CURSOR);        current = -1;        return true;  }  // create a new panel  private void addPanel(int x, int y) {     if ( PANEL_COUNT < MAX_PANELS) {        FramedPanel p = new FramedPanel();        p.move(x, y);        p.resize(100, 100);        add(p);        p.show();         panels[PANEL_COUNT++] = p;         repaint();      }   }   // remove selected panel   private void removePanel(int c) {      if (0 <= c && c < PANEL_COUNT) {         panels[c].hide();         PANEL_COUNT = PANEL_COUNT - 1;         // move panels in array down         for(int i = c; i <= PANEL_COUNT; i++)            panels[i + 1] = panels[i];         repaint();      }   }   private int findPanel(int x, int y) {      // panels[i] selected?      for(int i = 0; i < PANEL_COUNT; i++) {         Point p = panels[i].location();         Dimension d = panels[i].size();         if ((p.x <= x && x <= p.x + d.width)            && (p.y <= y && y <= p.y + d.height)) {            if ((x > p.x + d.width – 7) && (y > p.y + d.height – 7))               MOVING = false;   // near border            else               MOVING = true;  // near center            return i;         } // if      } // for      return -1;  // no panel selected    } // findPanel   public boolean handleEvent(Event e) {      if (e.id == Event.WINDOW_DESTROY) System.exit(0);      return super.handleEvent(e);   }   public void paint(Graphics g) {      for(int i = 0; i < PANEL_COUNT; i++)         panels[i].repaint();   }   public void init() {      //setTitle("Paneled Frame");      setLayout(new FlowLayout());      MAX_PANELS = 10;      panels = new FramedPanel[MAX_PANELS];      resize(400, 300);      show();   }} 

Share the Post:
Share on facebook
Share on twitter
Share on linkedin

Overview

The Latest

your company's audio

4 Areas of Your Company Where Your Audio Really Matters

Your company probably relies on audio more than you realize. Whether you’re creating a spoken text message to a colleague or giving a speech, you want your audio to shine. Otherwise, you could cause avoidable friction points and potentially hurt your brand reputation. For example, let’s say you create a

chrome os developer mode

How to Turn on Chrome OS Developer Mode

Google’s Chrome OS is a popular operating system that is widely used on Chromebooks and other devices. While it is designed to be simple and user-friendly, there are times when users may want to access additional features and functionality. One way to do this is by turning on Chrome OS

homes in the real estate industry

Exploring the Latest Tech Trends Impacting the Real Estate Industry

The real estate industry is changing thanks to the newest technological advancements. These new developments — from blockchain and AI to virtual reality and 3D printing — are poised to change how we buy and sell homes. Real estate brokers, buyers, sellers, wholesale real estate professionals, fix and flippers, and beyond may