Home » Eclipse Projects » Standard Widget Toolkit (SWT) » Custom Control Traversal
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| Re: Custom Control Traversal [message #450588 is a reply to message #450554] |
Tue, 15 February 2005 18:42   |
 Scott Pelton
Messages: 81
Registered: July 2009 |
Member |
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|
> Is focus ever supposed to go to the parent of the three other custom
> controls?
No, just the custom child controls.
Here is the design of my custom control:
Composite comp0 - is the parent.
Composite comp1 - is a child of comp0.
Composite comp2 - is a child of comp0.
Composite comp3 - is a child of comp0.
comp1 contains 2 Labels
comp2 contains n Canvas (where n >= 1; generally 1 to 3)
comp3 contains 1 Button
I want focus order to be:
comp1, comp2(canvas[0]), comp2(canvas[1]), ..., comp2(canvas[n]),
comp2(Button);
> Have you seen Snippet21? It might be exactly what you are looking for to
> use with the three controls.
Yes, this is where I started.
>
http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.swt.sni ppets/src/org/eclipse/swt/snippets/Snippet21.java?rev=HEAD&a mp;content-type=text/vnd.viewcvs-markup
> If you could post a small stand alone snippet, we could probably help you
> more.
I will work on getting one posted. BTW, I am developing for PPC.
> "Scott Pelton" <scottp@worldpac.com> wrote in message
> news:cuqu80$am1$1@www.eclipse.org...
>> I am having trouble understanding focus traversal in a custom control. I
>> have a custom control that extends composite. My custom control contains
>> three other custom controls. I want to traverse these custom controls in
>> order as a tab group.
>>
>> I have played around with the few things I have found in this forum
>> (archive) to help me get a grasp on understanding traversal.... however I
>> am coming up more confused than when I began.
>>
>> Do I need to implement traversal on my own (simply setting the tab list
>> does not do the trick)? If so, do I do this in a traverse listener for
>> each control in my composite or in a traverse listener for for my custom
>> control (composite)? Do I do this using the traverse() method or is the
>> setFocus() method prefered?
>>
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| Re: Custom Control Traversal [message #450642 is a reply to message #450588] |
Wed, 16 February 2005 13:58 |
Steve Northover
Messages: 1636
Registered: July 2009 |
Senior Member |
|
|
Ok, I'll wait for the snippet.
"Scott Pelton" <scottp@worldpac.com> wrote in message
news:cutfrd$bmn$1@www.eclipse.org...
> > Is focus ever supposed to go to the parent of the three other custom
> > controls?
> No, just the custom child controls.
> Here is the design of my custom control:
> Composite comp0 - is the parent.
> Composite comp1 - is a child of comp0.
> Composite comp2 - is a child of comp0.
> Composite comp3 - is a child of comp0.
> comp1 contains 2 Labels
> comp2 contains n Canvas (where n >= 1; generally 1 to 3)
> comp3 contains 1 Button
>
> I want focus order to be:
> comp1, comp2(canvas[0]), comp2(canvas[1]), ..., comp2(canvas[n]),
> comp2(Button);
>
>
> > Have you seen Snippet21? It might be exactly what you are looking for
to
> > use with the three controls.
>
> Yes, this is where I started.
>
> >
>
http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.swt.sni ppets/src/org/eclipse/swt/snippets/Snippet21.java?rev=HEAD&a mp;content-type=text/vnd.viewcvs-markup
>
> > If you could post a small stand alone snippet, we could probably help
you
> > more.
>
> I will work on getting one posted. BTW, I am developing for PPC.
>
>
> > "Scott Pelton" <scottp@worldpac.com> wrote in message
> > news:cuqu80$am1$1@www.eclipse.org...
> >> I am having trouble understanding focus traversal in a custom control.
I
> >> have a custom control that extends composite. My custom control
contains
> >> three other custom controls. I want to traverse these custom controls
in
> >> order as a tab group.
> >>
> >> I have played around with the few things I have found in this forum
> >> (archive) to help me get a grasp on understanding traversal.... however
I
> >> am coming up more confused than when I began.
> >>
> >> Do I need to implement traversal on my own (simply setting the tab list
> >> does not do the trick)? If so, do I do this in a traverse listener for
> >> each control in my composite or in a traverse listener for for my
custom
> >> control (composite)? Do I do this using the traverse() method or is the
> >> setFocus() method prefered?
> >>
>
>
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| Re: Custom Control Traversal [message #450722 is a reply to message #450642] |
Thu, 17 February 2005 00:34 |
Scott Pelton
Messages: 81
Registered: July 2009 |
Member |
|
|
Here is the snippet.....it is quite long...
the main class "snippet_DPPanel" plus five classes (1 inner and 1 inner
inner)
import java.util.*;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
/**
* @author spelton Feb 16, 2005
* Snippet to test custom control (DPPanel)
* I am having trouble getting tabbing to work.
*
* NOTE1: to be run on pocket pc
*
* NOTE2: if you pass in an integer n on the command line then n controls
will be created
* (recommend n=5) otherwise two controls are created.
*
* NOTE3: there is no functionality in this snippet
* (except for a popup menu appearing upon clicking down arrow button)
*
*/
public class snippet_DPPanel
{
public static void main(String[] args)
{
Display display = new Display();
Shell shell = new Shell(display, SWT.NONE);
shell.setLayout(new GridLayout());
//
Menu bar = new Menu(shell, SWT.BAR);
shell.setMenuBar(bar);
int cnt = 2;
try
{
cnt = Integer.parseInt(args[0]);
}
catch(Exception e)
{
}
//just test data
DPPanel[] dpp = new DPPanel[cnt];
for(int i = 0; i < cnt; i++)
{
dpp[i] = new DPPanel(shell, "test"+i, i+1);
dpp[i].setLayoutData(new GridData(GridData.FILL_BOTH));
}
dpp[0].setFocus();
shell.open();
while(!shell.isDisposed())
{
if(!display.readAndDispatch ()) display.sleep();
}
display.dispose();
}
}
class DPPanel extends Composite
{
ImageLabel imglblIdentifier;
Label lblStatus;
BoxesPanel boxesPanel;
FormData fd1;
ArrowButtonPanel abPanel;
Menu popupMenu;
MenuItem itemPartial, itemLater, itemCancel, itemReset;
int iBoxes;
/**
* Constructor for DPPanel.
* @param arg0 - Composite to which this DPPanel is a child of.
* @param sID - identifies this delivery/pickup (i.e. Pick Ticket #)
* @param iBoxes - number of packages
* Generic constructor
*/
public DPPanel(Composite arg0, String sID, int iBoxes)
{
super(arg0, SWT.NONE);
this.iBoxes = iBoxes;
//creat layout stuff
FormLayout fl = new FormLayout();
fl.marginWidth = 2;
fl.marginHeight = 2;
this.setLayout(fl);
FormData fd0 = new FormData();
fd0.left = new FormAttachment(0 ,2);
fd0.top = new FormAttachment(0 ,2);
//add identifier label
imglblIdentifier = new ImageLabel(this, SWT.LEFT);
imglblIdentifier.setImage(null);
imglblIdentifier.setText(sID);
imglblIdentifier.setLayoutData(fd0);
FormData fd2 = new FormData();
fd2.top = new FormAttachment(0,-4);
fd2.right = new FormAttachment(100, 0);
//add arrow button
abPanel = new ArrowButtonPanel(this);
abPanel.setLayoutData(fd2);
//do popup menu stuff
popupMenu = new Menu(this);
itemPartial = new MenuItem(popupMenu, SWT.PUSH);
itemPartial.setText("Partial");
itemLater = new MenuItem(popupMenu, SWT.PUSH);
itemLater.setText("Later");
itemCancel = new MenuItem(popupMenu, SWT.PUSH);
itemCancel.setText("Cancel");
itemReset = new MenuItem(popupMenu, SWT.PUSH);
itemReset.setText("Reset");
fd1 = new FormData();
fd1.top = new FormAttachment(0,-4);
fd1.left = new FormAttachment(30, 2);
fd1.right = new FormAttachment(90, 0);
boxesPanel = new BoxesPanel(this, iBoxes, 0);
boxesPanel.setLayoutData(fd1);
//add listeners
addListeners();
}
/**
*
*
*
*/
public void setBackground(Color clr)
{
super.setBackground(clr);
imglblIdentifier.setBackground(clr);
abPanel.setBackground(clr);
boxesPanel.setBackground(clr);
}
/**
*
*
*
*/
void addListeners()
{
this.addDisposeListener(new DisposeListener()
{
public void widgetDisposed(DisposeEvent e)
{
}
});
this.addListener(SWT.Traverse, new Listener()
{
public void handleEvent(Event e)
{
switch(e.detail)
{
/* Do tab group traversal */
case SWT.TRAVERSE_ESCAPE:
case SWT.TRAVERSE_RETURN:
case SWT.TRAVERSE_TAB_NEXT:
case SWT.TRAVERSE_TAB_PREVIOUS:
case SWT.TRAVERSE_PAGE_NEXT:
case SWT.TRAVERSE_PAGE_PREVIOUS:
e.doit = true;
break;
}
}
});
this.addListener(SWT.FocusIn, new Listener()
{
public void handleEvent(Event e)
{
DPPanel.this.redraw();
}
});
this.addListener(SWT.FocusOut, new Listener()
{
public void handleEvent(Event e)
{
DPPanel.this.redraw();
}
});
abPanel.ab.addSelectionListener(new SelectionAdapter()
{
public void widgetSelected(SelectionEvent e)
{
showPopupMenu();
}
});
abPanel.ab.addKeyListener(new KeyAdapter()
{
public void keyDown(KeyEvent e)
{
if(e.character == SWT.CR) showPopupMenu();
}
});
}
/**
*
*
*
*/
void showPopupMenu()
{
if(popupMenu.isVisible()) return;
Rectangle rect = abPanel.ab.getBounds();
rect = Display.getCurrent().map(abPanel.ab.getParent(), null, rect);
int x = rect.x;
int y = rect.y + rect.height;
//note: menu.getSize() will be available in SWT3.0 M8
//which may not help here if it only returns size of a visible menu
//see: https://bugs.eclipse.org/bugs/show_bug.cgi?id=48341
//show popup menu
int xAlign =54;
popupMenu.setLocation(x-xAlign, y-1);
popupMenu.setVisible(true);
}
/**
*
* INNER class
* control that represents the number of pkgs
*/
class BoxesPanel extends Composite
{
BoxButton[] bbArray;
int iBoxes;
/**
* @author spelton Nov 24, 2003
* CONSTR
*
*/
public BoxesPanel(Composite arg0, int iB, int iL)
{
super(arg0, SWT.NONE);
RowLayout rl = new RowLayout(SWT.HORIZONTAL);
rl.marginWidth = 2;
rl.marginHeight = 2;
this.setLayout(rl);
this.iBoxes = iB;
int n = 0;
if(iL > iB) n = iL - iB;
bbArray = new BoxButton[iBoxes+n];
//do boxes up to pkg count
int i = 0;
for(; i < iBoxes; i++)
{
bbArray[i] = new BoxButton(this, i);
bbArray[i].setLayoutData(new RowData(17,17));
}
this.addListener(SWT.Traverse, new Listener()
{
public void handleEvent(Event e)
{
switch(e.detail)
{
/* Do tab group traversal */
case SWT.TRAVERSE_ESCAPE:
case SWT.TRAVERSE_RETURN:
case SWT.TRAVERSE_TAB_NEXT:
case SWT.TRAVERSE_TAB_PREVIOUS:
case SWT.TRAVERSE_PAGE_NEXT:
case SWT.TRAVERSE_PAGE_PREVIOUS:
e.doit = true;
break;
}
}
});
this.addListener(SWT.FocusIn, new Listener()
{
public void handleEvent(Event e)
{
BoxesPanel.this.redraw();
}
});
this.addListener(SWT.FocusOut, new Listener()
{
public void handleEvent(Event e)
{
BoxesPanel.this.redraw();
}
});
}
/**
*
*
*
*/
public void setEnabled(boolean b)
{
super.setEnabled(b);
for (int i = 0; i < bbArray.length; i++)
{
bbArray[i].setEnabled(b);
}
}
/**
* INNER INNER class
*
*
*/
class BoxButton extends Canvas
{
final static int PKG_NOT_LOADED = 20;
int iState = PKG_NOT_LOADED;
String sID;
private boolean bEnabled = true;
Color clrTopTri;//previous bckgrnd color
/**
* @author spelton Nov 26, 2003
* CONSTR
*
*/
public BoxButton(Composite parent, int idx)
{
super(parent, SWT.NO_BACKGROUND);
this.sID = Integer.toString(idx+1);
clrTopTri = getBackground();
addListeners();
}
/**
* @author spelton Feb 9, 2005
*
*
*/
void addListeners()
{
this.addPaintListener(new PaintListener()
{
public void paintControl(PaintEvent e)
{
paint();
}
});
//
this.addListener(SWT.Traverse, new Listener()
{
public void handleEvent(Event e)
{
switch(e.detail)
{
/* Do tab group traversal */
case SWT.TRAVERSE_ESCAPE:
case SWT.TRAVERSE_RETURN:
case SWT.TRAVERSE_TAB_NEXT:
case SWT.TRAVERSE_TAB_PREVIOUS:
case SWT.TRAVERSE_PAGE_NEXT:
case SWT.TRAVERSE_PAGE_PREVIOUS:
e.doit = true;
break;
}
}
});
this.addListener(SWT.FocusIn, new Listener()
{
public void handleEvent(Event e)
{
BoxButton.this.redraw();
}
});
this.addListener(SWT.FocusOut, new Listener()
{
public void handleEvent(Event e)
{
BoxButton.this.redraw();
}
});
}
/**
*
* override setEnabled
*
*/
public void setEnabled(boolean b)
{
bEnabled = b;
paint();
}
public boolean isEnabled(){ return bEnabled; }
/**
*
* draw this box button
*
*/
void paint()
{
GC gc = new GC(this);
gc.setBackground(getBackground());
gc.setForeground(getForeground());
//
gc.setLineWidth(this.isFocusControl() ? 3 : 1);
//draw box border
gc.drawRectangle(0, 0, 16, 16);
//draw box id - package number
String fnt_name = gc.getFont().getFontData()[0].getName();
Font f = new Font(Display.getCurrent(), fnt_name, 7, SWT.NORMAL);
gc.setFont(f);
Point pt = gc.stringExtent(sID);
gc.drawString(sID, 8-pt.x/2, 8-pt.y/2, true);
//
f.dispose();
gc.dispose();
}
}
}
}
class ArrowButtonPanel extends Composite
{
Button ab;
/**
* @author spelton Nov 24, 2003
* CONSTR
*
*/
public ArrowButtonPanel(Composite arg0)
{
super(arg0, SWT.NONE);
RowLayout rl = new RowLayout(SWT.HORIZONTAL);
rl.marginWidth = 0;
rl.marginHeight = 2;
this.setLayout(rl);
ab = new Button(this, SWT.ARROW | SWT.DOWN);
ab.setLayoutData(new RowData(17,17));
addListeners();
this.setTabList(new Control[] {ab});
}
/**
* @author spelton Feb 9, 2005
*
*
*/
void addListeners()
{
this.addListener(SWT.Traverse, new Listener()
{
public void handleEvent(Event e)
{
switch(e.detail)
{
/* Do tab group traversal */
case SWT.TRAVERSE_ESCAPE:
case SWT.TRAVERSE_RETURN:
case SWT.TRAVERSE_TAB_NEXT:
case SWT.TRAVERSE_TAB_PREVIOUS:
case SWT.TRAVERSE_PAGE_NEXT:
case SWT.TRAVERSE_PAGE_PREVIOUS:
e.doit = true;
break;
}
}
});
this.addListener(SWT.FocusIn, new Listener()
{
public void handleEvent(Event e)
{
ArrowButtonPanel.this.redraw();
}
});
this.addListener(SWT.FocusOut, new Listener()
{
public void handleEvent(Event e)
{
ArrowButtonPanel.this.redraw();
}
});
}
}
class ImageLabel extends Composite
{
Label lblImage, lblText;
/**
* Constructor for ImageLabel.
* @param arg0
* @param arg1
*/
public ImageLabel(Composite arg0, int arg1)
{
super(arg0, arg1);
//creat layout stuff
FormLayout fl = new FormLayout();
fl.marginWidth = 1;
fl.marginHeight = 1;
this.setLayout(fl);
FormData fd00 = new FormData();
fd00.left = new FormAttachment(0,0);
fd00.top = new FormAttachment(0,0);
//add image label
lblImage = new Label(this, SWT.CENTER | SWT.NO_FOCUS);
lblImage.setLayoutData(fd00);
FormData fd0 = new FormData();
fd0.left = new FormAttachment(lblImage, 2);
fd0.top = new FormAttachment(0,0);
//add text label
lblText = new Label(this, SWT.LEFT | SWT.NO_FOCUS);
lblText.setLayoutData(fd0);
addListeners();
}
/**
* @author spelton Dec 17, 2004
*
*
*/
void addListeners()
{
//underline text
lblText.addPaintListener(new PaintListener()
{
public void paintControl(PaintEvent e)
{
Point p = e.gc.textExtent(lblText.getText());
e.gc.drawLine(0, p.y-1, p.x, p.y-1);
}
});
//
this.addListener(SWT.Traverse, new Listener()
{
public void handleEvent(Event e)
{
switch(e.detail)
{
/* Do tab group traversal */
case SWT.TRAVERSE_ESCAPE:
case SWT.TRAVERSE_RETURN:
case SWT.TRAVERSE_TAB_NEXT:
case SWT.TRAVERSE_TAB_PREVIOUS:
case SWT.TRAVERSE_PAGE_NEXT:
case SWT.TRAVERSE_PAGE_PREVIOUS:
e.doit = true;
break;
}
}
});
this.addListener(SWT.FocusIn, new Listener()
{
public void handleEvent(Event e)
{
ImageLabel.this.redraw();
}
});
this.addListener(SWT.FocusOut, new Listener()
{
public void handleEvent(Event e)
{
ImageLabel.this.redraw();
}
});
//draw focus border
this.addPaintListener(new PaintListener()
{
public void paintControl(PaintEvent e)
{
paint();
}
});
}
/**
* @author spelton Feb 8, 2005
*
*
*/
void paint()
{
GC gc = new GC(this);
if(isFocusControl())
{
Rectangle r = getBounds();
gc.drawFocus(0,0,r.width,r.height);
}
else
{
gc.setForeground(getBackground());
Rectangle r = getBounds();
gc.drawRectangle(0,0,r.width,r.height);
}
gc.dispose();
}
/**
* @author spelton May 27, 2004
*
*
*/
public void setImage(Image img)
{
lblImage.setImage(img);
}
/**
* @author spelton May 27, 2004
*
*
*/
public void setText(String s)
{
lblText.setText(s);
}
/**
* @author spelton May 27, 2004
*
*
*/
public void setBackground(Color clr)
{
super.setBackground(clr);
lblImage.setBackground(clr);
lblText.setBackground(clr);
}
}
Steve Northover wrote:
> Ok, I'll wait for the snippet.
> "Scott Pelton" <scottp@worldpac.com> wrote in message
> news:cutfrd$bmn$1@www.eclipse.org...
>> > Is focus ever supposed to go to the parent of the three other custom
>> > controls?
>> No, just the custom child controls.
>> Here is the design of my custom control:
>> Composite comp0 - is the parent.
>> Composite comp1 - is a child of comp0.
>> Composite comp2 - is a child of comp0.
>> Composite comp3 - is a child of comp0.
>> comp1 contains 2 Labels
>> comp2 contains n Canvas (where n >= 1; generally 1 to 3)
>> comp3 contains 1 Button
>>
>> I want focus order to be:
>> comp1, comp2(canvas[0]), comp2(canvas[1]), ..., comp2(canvas[n]),
>> comp2(Button);
>>
>>
>> > Have you seen Snippet21? It might be exactly what you are looking for
> to
>> > use with the three controls.
>>
>> Yes, this is where I started.
>>
>> >
>>
>
http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.swt.sni ppets/src/org/eclipse/swt/snippets/Snippet21.java?rev=HEAD&a mp;content-type=text/vnd.viewcvs-markup
>>
>> > If you could post a small stand alone snippet, we could probably help
> you
>> > more.
>>
>> I will work on getting one posted. BTW, I am developing for PPC.
>>
>>
>> > "Scott Pelton" <scottp@worldpac.com> wrote in message
>> > news:cuqu80$am1$1@www.eclipse.org...
>> >> I am having trouble understanding focus traversal in a custom control.
> I
>> >> have a custom control that extends composite. My custom control
> contains
>> >> three other custom controls. I want to traverse these custom controls
> in
>> >> order as a tab group.
>> >>
>> >> I have played around with the few things I have found in this forum
>> >> (archive) to help me get a grasp on understanding traversal.... however
> I
>> >> am coming up more confused than when I began.
>> >>
>> >> Do I need to implement traversal on my own (simply setting the tab list
>> >> does not do the trick)? If so, do I do this in a traverse listener for
>> >> each control in my composite or in a traverse listener for for my
> custom
>> >> control (composite)? Do I do this using the traverse() method or is the
>> >> setFocus() method prefered?
>> >>
>>
>>
|
|
|
| Re: Custom Control Traversal [message #450756 is a reply to message #450722] |
Thu, 17 February 2005 18:25 |
Steve Northover
Messages: 1636
Registered: July 2009 |
Senior Member |
|
|
Yikes ... that's a lot of code. Ok, it was impossible for me to know if it
was working but when I added key listeners to the various components, I was
able to tab around. You need to add a key listener to a control or it won't
get focus (because there is nobody processing keys).
"Scott Pelton" <scottp@worldpac.com> wrote in message
news:cv0org$n87$1@www.eclipse.org...
> Here is the snippet.....it is quite long...
> the main class "snippet_DPPanel" plus five classes (1 inner and 1 inner
> inner)
>
> import java.util.*;
>
> import org.eclipse.swt.SWT;
> import org.eclipse.swt.events.*;
> import org.eclipse.swt.graphics.*;
> import org.eclipse.swt.layout.*;
> import org.eclipse.swt.widgets.*;
>
> /**
> * @author spelton Feb 16, 2005
> * Snippet to test custom control (DPPanel)
> * I am having trouble getting tabbing to work.
> *
> * NOTE1: to be run on pocket pc
> *
> * NOTE2: if you pass in an integer n on the command line then n controls
> will be created
> * (recommend n=5) otherwise two controls are created.
> *
> * NOTE3: there is no functionality in this snippet
> * (except for a popup menu appearing upon clicking down arrow button)
> *
> */
> public class snippet_DPPanel
> {
> public static void main(String[] args)
> {
> Display display = new Display();
> Shell shell = new Shell(display, SWT.NONE);
> shell.setLayout(new GridLayout());
> //
> Menu bar = new Menu(shell, SWT.BAR);
> shell.setMenuBar(bar);
>
> int cnt = 2;
> try
> {
> cnt = Integer.parseInt(args[0]);
> }
> catch(Exception e)
> {
>
> }
>
> //just test data
> DPPanel[] dpp = new DPPanel[cnt];
> for(int i = 0; i < cnt; i++)
> {
> dpp[i] = new DPPanel(shell, "test"+i, i+1);
> dpp[i].setLayoutData(new GridData(GridData.FILL_BOTH));
> }
> dpp[0].setFocus();
>
> shell.open();
> while(!shell.isDisposed())
> {
> if(!display.readAndDispatch ()) display.sleep();
> }
> display.dispose();
> }
> }
>
> class DPPanel extends Composite
> {
> ImageLabel imglblIdentifier;
> Label lblStatus;
> BoxesPanel boxesPanel;
> FormData fd1;
>
> ArrowButtonPanel abPanel;
> Menu popupMenu;
> MenuItem itemPartial, itemLater, itemCancel, itemReset;
>
> int iBoxes;
>
> /**
> * Constructor for DPPanel.
> * @param arg0 - Composite to which this DPPanel is a child of.
> * @param sID - identifies this delivery/pickup (i.e. Pick Ticket #)
> * @param iBoxes - number of packages
> * Generic constructor
> */
> public DPPanel(Composite arg0, String sID, int iBoxes)
> {
> super(arg0, SWT.NONE);
>
> this.iBoxes = iBoxes;
>
> //creat layout stuff
> FormLayout fl = new FormLayout();
> fl.marginWidth = 2;
> fl.marginHeight = 2;
> this.setLayout(fl);
>
> FormData fd0 = new FormData();
> fd0.left = new FormAttachment(0 ,2);
> fd0.top = new FormAttachment(0 ,2);
>
> //add identifier label
> imglblIdentifier = new ImageLabel(this, SWT.LEFT);
> imglblIdentifier.setImage(null);
> imglblIdentifier.setText(sID);
> imglblIdentifier.setLayoutData(fd0);
>
> FormData fd2 = new FormData();
> fd2.top = new FormAttachment(0,-4);
> fd2.right = new FormAttachment(100, 0);
>
> //add arrow button
> abPanel = new ArrowButtonPanel(this);
> abPanel.setLayoutData(fd2);
>
> //do popup menu stuff
> popupMenu = new Menu(this);
>
> itemPartial = new MenuItem(popupMenu, SWT.PUSH);
> itemPartial.setText("Partial");
>
> itemLater = new MenuItem(popupMenu, SWT.PUSH);
> itemLater.setText("Later");
>
> itemCancel = new MenuItem(popupMenu, SWT.PUSH);
> itemCancel.setText("Cancel");
>
> itemReset = new MenuItem(popupMenu, SWT.PUSH);
> itemReset.setText("Reset");
>
> fd1 = new FormData();
> fd1.top = new FormAttachment(0,-4);
> fd1.left = new FormAttachment(30, 2);
> fd1.right = new FormAttachment(90, 0);
>
> boxesPanel = new BoxesPanel(this, iBoxes, 0);
> boxesPanel.setLayoutData(fd1);
>
> //add listeners
> addListeners();
> }
>
> /**
> *
> *
> *
> */
> public void setBackground(Color clr)
> {
> super.setBackground(clr);
> imglblIdentifier.setBackground(clr);
> abPanel.setBackground(clr);
> boxesPanel.setBackground(clr);
> }
>
>
> /**
> *
> *
> *
> */
> void addListeners()
> {
> this.addDisposeListener(new DisposeListener()
> {
> public void widgetDisposed(DisposeEvent e)
> {
>
> }
> });
> this.addListener(SWT.Traverse, new Listener()
> {
> public void handleEvent(Event e)
> {
> switch(e.detail)
> {
> /* Do tab group traversal */
> case SWT.TRAVERSE_ESCAPE:
> case SWT.TRAVERSE_RETURN:
> case SWT.TRAVERSE_TAB_NEXT:
> case SWT.TRAVERSE_TAB_PREVIOUS:
> case SWT.TRAVERSE_PAGE_NEXT:
> case SWT.TRAVERSE_PAGE_PREVIOUS:
> e.doit = true;
> break;
> }
> }
> });
> this.addListener(SWT.FocusIn, new Listener()
> {
> public void handleEvent(Event e)
> {
> DPPanel.this.redraw();
> }
> });
> this.addListener(SWT.FocusOut, new Listener()
> {
> public void handleEvent(Event e)
> {
> DPPanel.this.redraw();
> }
> });
> abPanel.ab.addSelectionListener(new SelectionAdapter()
> {
> public void widgetSelected(SelectionEvent e)
> {
> showPopupMenu();
> }
> });
> abPanel.ab.addKeyListener(new KeyAdapter()
> {
> public void keyDown(KeyEvent e)
> {
> if(e.character == SWT.CR) showPopupMenu();
> }
> });
> }
>
>
>
>
> /**
> *
> *
> *
> */
> void showPopupMenu()
> {
> if(popupMenu.isVisible()) return;
> Rectangle rect = abPanel.ab.getBounds();
> rect = Display.getCurrent().map(abPanel.ab.getParent(), null, rect);
> int x = rect.x;
> int y = rect.y + rect.height;
>
> //note: menu.getSize() will be available in SWT3.0 M8
> //which may not help here if it only returns size of a visible menu
> //see: https://bugs.eclipse.org/bugs/show_bug.cgi?id=48341
>
> //show popup menu
> int xAlign =54;
> popupMenu.setLocation(x-xAlign, y-1);
> popupMenu.setVisible(true);
> }
>
>
> /**
> *
> * INNER class
> * control that represents the number of pkgs
> */
> class BoxesPanel extends Composite
> {
> BoxButton[] bbArray;
> int iBoxes;
>
> /**
> * @author spelton Nov 24, 2003
> * CONSTR
> *
> */
> public BoxesPanel(Composite arg0, int iB, int iL)
> {
> super(arg0, SWT.NONE);
> RowLayout rl = new RowLayout(SWT.HORIZONTAL);
> rl.marginWidth = 2;
> rl.marginHeight = 2;
> this.setLayout(rl);
>
>
> this.iBoxes = iB;
> int n = 0;
> if(iL > iB) n = iL - iB;
> bbArray = new BoxButton[iBoxes+n];
> //do boxes up to pkg count
> int i = 0;
> for(; i < iBoxes; i++)
> {
> bbArray[i] = new BoxButton(this, i);
> bbArray[i].setLayoutData(new RowData(17,17));
> }
>
> this.addListener(SWT.Traverse, new Listener()
> {
> public void handleEvent(Event e)
> {
> switch(e.detail)
> {
> /* Do tab group traversal */
> case SWT.TRAVERSE_ESCAPE:
> case SWT.TRAVERSE_RETURN:
> case SWT.TRAVERSE_TAB_NEXT:
> case SWT.TRAVERSE_TAB_PREVIOUS:
> case SWT.TRAVERSE_PAGE_NEXT:
> case SWT.TRAVERSE_PAGE_PREVIOUS:
> e.doit = true;
> break;
> }
> }
> });
> this.addListener(SWT.FocusIn, new Listener()
> {
> public void handleEvent(Event e)
> {
> BoxesPanel.this.redraw();
> }
> });
> this.addListener(SWT.FocusOut, new Listener()
> {
> public void handleEvent(Event e)
> {
> BoxesPanel.this.redraw();
> }
> });
> }
>
> /**
> *
> *
> *
> */
> public void setEnabled(boolean b)
> {
> super.setEnabled(b);
> for (int i = 0; i < bbArray.length; i++)
> {
> bbArray[i].setEnabled(b);
> }
> }
>
>
> /**
> * INNER INNER class
> *
> *
> */
> class BoxButton extends Canvas
> {
> final static int PKG_NOT_LOADED = 20;
> int iState = PKG_NOT_LOADED;
> String sID;
>
> private boolean bEnabled = true;
> Color clrTopTri;//previous bckgrnd color
>
> /**
> * @author spelton Nov 26, 2003
> * CONSTR
> *
> */
> public BoxButton(Composite parent, int idx)
> {
> super(parent, SWT.NO_BACKGROUND);
> this.sID = Integer.toString(idx+1);
> clrTopTri = getBackground();
> addListeners();
> }
>
> /**
> * @author spelton Feb 9, 2005
> *
> *
> */
> void addListeners()
> {
> this.addPaintListener(new PaintListener()
> {
> public void paintControl(PaintEvent e)
> {
> paint();
> }
> });
> //
> this.addListener(SWT.Traverse, new Listener()
> {
> public void handleEvent(Event e)
> {
> switch(e.detail)
> {
> /* Do tab group traversal */
> case SWT.TRAVERSE_ESCAPE:
> case SWT.TRAVERSE_RETURN:
> case SWT.TRAVERSE_TAB_NEXT:
> case SWT.TRAVERSE_TAB_PREVIOUS:
> case SWT.TRAVERSE_PAGE_NEXT:
> case SWT.TRAVERSE_PAGE_PREVIOUS:
> e.doit = true;
> break;
> }
> }
> });
> this.addListener(SWT.FocusIn, new Listener()
> {
> public void handleEvent(Event e)
> {
> BoxButton.this.redraw();
> }
> });
> this.addListener(SWT.FocusOut, new Listener()
> {
> public void handleEvent(Event e)
> {
> BoxButton.this.redraw();
> }
> });
> }
>
> /**
> *
> * override setEnabled
> *
> */
> public void setEnabled(boolean b)
> {
> bEnabled = b;
> paint();
> }
> public boolean isEnabled(){ return bEnabled; }
>
>
>
> /**
> *
> * draw this box button
> *
> */
> void paint()
> {
> GC gc = new GC(this);
> gc.setBackground(getBackground());
> gc.setForeground(getForeground());
>
> //
> gc.setLineWidth(this.isFocusControl() ? 3 : 1);
> //draw box border
> gc.drawRectangle(0, 0, 16, 16);
>
> //draw box id - package number
> String fnt_name = gc.getFont().getFontData()[0].getName();
> Font f = new Font(Display.getCurrent(), fnt_name, 7, SWT.NORMAL);
> gc.setFont(f);
> Point pt = gc.stringExtent(sID);
> gc.drawString(sID, 8-pt.x/2, 8-pt.y/2, true);
>
> //
> f.dispose();
> gc.dispose();
> }
> }
> }
> }
>
>
> class ArrowButtonPanel extends Composite
> {
> Button ab;
>
> /**
> * @author spelton Nov 24, 2003
> * CONSTR
> *
> */
> public ArrowButtonPanel(Composite arg0)
> {
> super(arg0, SWT.NONE);
> RowLayout rl = new RowLayout(SWT.HORIZONTAL);
> rl.marginWidth = 0;
> rl.marginHeight = 2;
> this.setLayout(rl);
>
> ab = new Button(this, SWT.ARROW | SWT.DOWN);
> ab.setLayoutData(new RowData(17,17));
> addListeners();
> this.setTabList(new Control[] {ab});
> }
>
> /**
> * @author spelton Feb 9, 2005
> *
> *
> */
> void addListeners()
> {
> this.addListener(SWT.Traverse, new Listener()
> {
> public void handleEvent(Event e)
> {
> switch(e.detail)
> {
> /* Do tab group traversal */
> case SWT.TRAVERSE_ESCAPE:
> case SWT.TRAVERSE_RETURN:
> case SWT.TRAVERSE_TAB_NEXT:
> case SWT.TRAVERSE_TAB_PREVIOUS:
> case SWT.TRAVERSE_PAGE_NEXT:
> case SWT.TRAVERSE_PAGE_PREVIOUS:
> e.doit = true;
> break;
> }
> }
> });
> this.addListener(SWT.FocusIn, new Listener()
> {
> public void handleEvent(Event e)
> {
> ArrowButtonPanel.this.redraw();
> }
> });
> this.addListener(SWT.FocusOut, new Listener()
> {
> public void handleEvent(Event e)
> {
> ArrowButtonPanel.this.redraw();
> }
> });
> }
> }
>
>
> class ImageLabel extends Composite
> {
> Label lblImage, lblText;
>
> /**
> * Constructor for ImageLabel.
> * @param arg0
> * @param arg1
> */
> public ImageLabel(Composite arg0, int arg1)
> {
> super(arg0, arg1);
> //creat layout stuff
> FormLayout fl = new FormLayout();
> fl.marginWidth = 1;
> fl.marginHeight = 1;
> this.setLayout(fl);
>
> FormData fd00 = new FormData();
> fd00.left = new FormAttachment(0,0);
> fd00.top = new FormAttachment(0,0);
>
> //add image label
> lblImage = new Label(this, SWT.CENTER | SWT.NO_FOCUS);
> lblImage.setLayoutData(fd00);
>
> FormData fd0 = new FormData();
> fd0.left = new FormAttachment(lblImage, 2);
> fd0.top = new FormAttachment(0,0);
>
> //add text label
> lblText = new Label(this, SWT.LEFT | SWT.NO_FOCUS);
> lblText.setLayoutData(fd0);
>
> addListeners();
> }
>
> /**
> * @author spelton Dec 17, 2004
> *
> *
> */
> void addListeners()
> {
> //underline text
> lblText.addPaintListener(new PaintListener()
> {
> public void paintControl(PaintEvent e)
> {
> Point p = e.gc.textExtent(lblText.getText());
> e.gc.drawLine(0, p.y-1, p.x, p.y-1);
> }
> });
> //
> this.addListener(SWT.Traverse, new Listener()
> {
> public void handleEvent(Event e)
> {
> switch(e.detail)
> {
> /* Do tab group traversal */
> case SWT.TRAVERSE_ESCAPE:
> case SWT.TRAVERSE_RETURN:
> case SWT.TRAVERSE_TAB_NEXT:
> case SWT.TRAVERSE_TAB_PREVIOUS:
> case SWT.TRAVERSE_PAGE_NEXT:
> case SWT.TRAVERSE_PAGE_PREVIOUS:
> e.doit = true;
> break;
> }
> }
> });
> this.addListener(SWT.FocusIn, new Listener()
> {
> public void handleEvent(Event e)
> {
> ImageLabel.this.redraw();
> }
> });
> this.addListener(SWT.FocusOut, new Listener()
> {
> public void handleEvent(Event e)
> {
> ImageLabel.this.redraw();
> }
> });
> //draw focus border
> this.addPaintListener(new PaintListener()
> {
> public void paintControl(PaintEvent e)
> {
> paint();
> }
> });
> }
>
>
> /**
> * @author spelton Feb 8, 2005
> *
> *
> */
> void paint()
> {
> GC gc = new GC(this);
> if(isFocusControl())
> {
> Rectangle r = getBounds();
> gc.drawFocus(0,0,r.width,r.height);
> }
> else
> {
> gc.setForeground(getBackground());
> Rectangle r = getBounds();
> gc.drawRectangle(0,0,r.width,r.height);
> }
> gc.dispose();
> }
>
> /**
> * @author spelton May 27, 2004
> *
> *
> */
> public void setImage(Image img)
> {
> lblImage.setImage(img);
> }
>
> /**
> * @author spelton May 27, 2004
> *
> *
> */
> public void setText(String s)
> {
> lblText.setText(s);
> }
>
> /**
> * @author spelton May 27, 2004
> *
> *
> */
> public void setBackground(Color clr)
> {
> super.setBackground(clr);
> lblImage.setBackground(clr);
> lblText.setBackground(clr);
> }
> }
>
> Steve Northover wrote:
>
> > Ok, I'll wait for the snippet.
>
> > "Scott Pelton" <scottp@worldpac.com> wrote in message
> > news:cutfrd$bmn$1@www.eclipse.org...
> >> > Is focus ever supposed to go to the parent of the three other custom
> >> > controls?
> >> No, just the custom child controls.
> >> Here is the design of my custom control:
> >> Composite comp0 - is the parent.
> >> Composite comp1 - is a child of comp0.
> >> Composite comp2 - is a child of comp0.
> >> Composite comp3 - is a child of comp0.
> >> comp1 contains 2 Labels
> >> comp2 contains n Canvas (where n >= 1; generally 1 to 3)
> >> comp3 contains 1 Button
> >>
> >> I want focus order to be:
> >> comp1, comp2(canvas[0]), comp2(canvas[1]), ..., comp2(canvas[n]),
> >> comp2(Button);
> >>
> >>
> >> > Have you seen Snippet21? It might be exactly what you are looking
for
> > to
> >> > use with the three controls.
> >>
> >> Yes, this is where I started.
> >>
> >> >
> >>
> >
>
http://dev.eclipse.org/viewcvs/index.cgi/org.eclipse.swt.sni ppets/src/org/eclipse/swt/snippets/Snippet21.java?rev=HEAD&a mp;content-type=text/vnd.viewcvs-markup
> >>
> >> > If you could post a small stand alone snippet, we could probably help
> > you
> >> > more.
> >>
> >> I will work on getting one posted. BTW, I am developing for PPC.
> >>
> >>
> >> > "Scott Pelton" <scottp@worldpac.com> wrote in message
> >> > news:cuqu80$am1$1@www.eclipse.org...
> >> >> I am having trouble understanding focus traversal in a custom
control.
> > I
> >> >> have a custom control that extends composite. My custom control
> > contains
> >> >> three other custom controls. I want to traverse these custom
controls
> > in
> >> >> order as a tab group.
> >> >>
> >> >> I have played around with the few things I have found in this forum
> >> >> (archive) to help me get a grasp on understanding traversal....
however
> > I
> >> >> am coming up more confused than when I began.
> >> >>
> >> >> Do I need to implement traversal on my own (simply setting the tab
list
> >> >> does not do the trick)? If so, do I do this in a traverse listener
for
> >> >> each control in my composite or in a traverse listener for for my
> > custom
> >> >> control (composite)? Do I do this using the traverse() method or is
the
> >> >> setFocus() method prefered?
> >> >>
> >>
> >>
>
>
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