Trouble with a custom button

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• Problem with fieldChanged() and custom button field

  Hello

  I created a custom button class by extending LabelField.  I chose LabelField over field because the LabelField contains desirable properties that are already being implemented.  The only problem I'm having has to do with the change listener.  It seems to 'steal' the event click on other areas in my application.

  For example, when I click on the custom button, a popupscreen with a listfield opens. When I click on an item in the listfield, then the fieldChanged() of custom button is called again...

  Can you see anything wrong with my code?

  package com.rantnetwork.fields;
  
  import com.rantnetwork.app.Constants;
  import net.rim.device.api.system.Display;
  import net.rim.device.api.ui.Color;
  import net.rim.device.api.ui.Field;
  import net.rim.device.api.ui.Font;
  import net.rim.device.api.ui.Graphics;
  import net.rim.device.api.ui.Ui;
  import net.rim.device.api.ui.XYEdges;
  import net.rim.device.api.ui.component.LabelField;
  import net.rim.device.api.ui.decor.BackgroundFactory;
  import net.rim.device.api.ui.decor.BorderFactory;
  
  public class CustomButtonField extends LabelField {
  
      private boolean highlighted = false;
  
      public CustomButtonField(String text, long style) {
          super(text, style | Field.FOCUSABLE | LabelField.ELLIPSIS);
  
          setPadding(10, 0, 10, 5);
  
          setFont(Font.getDefault().derive(Font.BOLD,
                  Constants.DEFAULT_FONT_SIZE, Ui.UNITS_pt));
  
          setBackground(BackgroundFactory.createLinearGradientBackground(
                  0x163d7c, 0x163d7c, 0x03162d, 0x03162d));
          setBorder(BorderFactory
                  .createBevelBorder(new XYEdges(1, 1, 1, 1), new XYEdges(
                          Color.BLACK, Color.BLACK, Color.BLACK, Color.BLACK),
                          new XYEdges(Color.BLACK, Color.BLACK, Color.BLACK,
                                  Color.BLACK)));
  
      }
  
      public int getPreferredWidth() {
          return Display.getWidth() / 3;
      }
  
      protected void paint(Graphics graphics) {
          graphics.setColor(Color.WHITE);
          super.paint(graphics);
      }
  
      protected void drawFocus(Graphics graphics, boolean on) {
          // Do nothing
      }
  
      protected boolean navigationClick(int status, int time) {
          fieldChangeNotify(1);
          return true;
      }
  
      protected void onFocus(int direction) {
          if (!highlighted) {
              setBackground(BackgroundFactory.createLinearGradientBackground(
                      0x4bb7df, 0x4bb7df, 0x1b96da, 0x1b96da));
              setBorder(BorderFactory.createBevelBorder(new XYEdges(1, 1, 1, 1),
                      new XYEdges(Color.BLACK, Color.BLACK, Color.BLACK,
                              Color.BLACK), new XYEdges(Color.BLACK, Color.BLACK,
                              Color.BLACK, Color.BLACK)));
          }
      }
  
      protected void onUnfocus() {
          if (!highlighted) {
              setBackground(BackgroundFactory.createLinearGradientBackground(
                      0x163d7c, 0x163d7c, 0x03162d, 0x03162d));
              setBorder(BorderFactory.createBevelBorder(new XYEdges(1, 1, 1, 1),
                      new XYEdges(Color.BLACK, Color.BLACK, Color.BLACK,
                              Color.BLACK), new XYEdges(Color.BLACK, Color.BLACK,
                              Color.BLACK, Color.BLACK)));
          }
      }
  
      public void showHighlighted(boolean focus) {
          if (focus) {
              highlighted = true;
              setBackground(BackgroundFactory.createLinearGradientBackground(
                      0x4bb7df, 0x4bb7df, 0x1b96da, 0x1b96da));
              setBorder(BorderFactory.createBevelBorder(new XYEdges(1, 1, 1, 1),
                      new XYEdges(Color.BLACK, Color.BLACK, Color.BLACK,
                              Color.BLACK), new XYEdges(Color.BLACK, Color.BLACK,
                              Color.BLACK, Color.BLACK)));
          } else {
              highlighted = false;
              setBackground(BackgroundFactory.createLinearGradientBackground(
                      0x163d7c, 0x163d7c, 0x03162d, 0x03162d));
              setBorder(BorderFactory.createBevelBorder(new XYEdges(1, 1, 1, 1),
                      new XYEdges(Color.BLACK, Color.BLACK, Color.BLACK,
                              Color.BLACK), new XYEdges(Color.BLACK, Color.BLACK,
                              Color.BLACK, Color.BLACK)));
          }
          invalidate();
      }
  
      public boolean isHighlighted() {
          return highlighted;
      }
  
  }
  

  behrk2 wrote:

  Now, I'm not sure why customButton.setText (calling) would trigger the fieldChanged().  Can anyone think of a reason why he can do?

  Thank you!

  Can you think of a reason why we can't do that? The field has changed, after all! Of course, the context (second argument to fieldChanged) will be PROGRAMMATIC in this case, that might be a pretty good indication for you. But not invoke fieldChanged at all would be wrong.

  This is why I don't like the idea of extending LabelField and not just the field for your custom badges - you have much less control over his behavior. If you want an example showing how to create abstract off-screen buttons, take a look at BaseButtonField and his descendants in managers, fields and advanced buttons.

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    Component parentComponent,
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  Hello world

  I have two field of custom button with different colors of red and white button.

  And I want to add and remove both button in the same place each other.

  I mean when I click on the red button, red button remove the screen and the same when I click on the white button to remove white button must be appear and red button should appear. Both button must be exposed to the same place.

  Please any idea...

  Thank you.

  public void add (field)
  survey
  IllegalStateException - if the field has already been added to a Manager.

  Public Sub delete (field)
  IllegalArgumentException - if the field to delete does belong to this Manager.

  So check with the field.getManager () function to make it work properly...

• Custom button field has two tops?

  I am trying to create a field of custom button so that I can have two lines of text - but I'm getting a second top so say (a second box with the shading/etc that has the top of a field of button).

  Here's a screenshot of it

  

  The bottom button is just a normal button.

  Field of custom button code:

  package com.smartmech.bb;
  
  import net.rim.device.api.system.Display;
  import net.rim.device.api.ui.Color;
  import net.rim.device.api.ui.Font;
  import net.rim.device.api.ui.Graphics;
  import net.rim.device.api.ui.Ui;
  import net.rim.device.api.ui.component.ButtonField;
  
  public class _customButtonField extends ButtonField {
          private int setWidth;
          private int setHeight;
          private boolean disabled = false;
          private String lblTxt1;
          private String lblTxt2 = "";
  
          _customButtonField( String text, int Width, int Height, long setStyle) {
              super(text, setStyle);
              setWidth = Width;
              setHeight = Height;
              lblTxt1 = text;
          } //customButtonField
  
          _customButtonField( String text, String text2, int Width, int Height, long setStyle) {
              super("",setStyle);
              setWidth = Width;
              setHeight = Height;
              lblTxt1 = text;
              lblTxt2 = text2;
          } //customButtonField
  
          public int getPreferredWidth() {
              return setWidth;
          } //getPreferredWidth
  
          public int getPreferredHeight() {
              return setHeight;
          } //getPreferredWidth
  
          public boolean isFocusable() {
              if(disabled)
                  return false;
              return true;
          } //isFocusable
  
          public void disable() {
              disabled=true;
              super.setVisualState(ButtonField.VISUAL_STATE_DISABLED);
          } //disable
  
          public void enable() {
              disabled=false;
              super.setVisualState(ButtonField.VISUAL_STATE_NORMAL);
          } //enable
  
          protected void layout(int width, int height) {  
  
              String platform = net.rim.device.api.system.DeviceInfo.getPlatformVersion();
  
              if (platform.substring(0,1).equals("5")) {
                  setExtent(setWidth, setHeight); //works in v5
              }
              else if (platform.substring(0,1).equals("6")) {
                  super.layout(setWidth, setHeight);
                  //setExtent(setWidth, setHeight);
              }
  
          } //layout
  
          protected void paint(Graphics g){
  
              super.paint(g);
  
              if (lblTxt2 != "") {
  
                  int myY = getPreferredHeight() / 2;
                  int myX = 0;
  
                  int myFH = g.getFont().getHeight();
                  if (myFH * 2 > getPreferredHeight()) {
                      myY = getPreferredHeight() - myFH;
                  }
                  myX = (getPreferredWidth() - g.getFont().getBounds(lblTxt1)) / 2;
                  g.drawText(lblTxt1, myX,0,0,this.getWidth());
  
                  myX = (getPreferredWidth() - g.getFont().getBounds(lblTxt2)) / 2;
                  g.drawText(lblTxt2, myX,myY,0,this.getWidth());
  
              } //lblTxt2 not blank
  
          } //paint
  
  } //customButtonField
  

  And call it:

  _customButtonField summaryBtn = new _customButtonField("Location", "Summary", btnWidth, btnHeight, ButtonField.CONSUME_CLICK);
   summaryBtn.setFont(mainFont);
  

  Any ideas as to why this is happening?

  Greetings.

  I agree with simon. And that's because you're going to have to completely override the paint method to reach your goal.

  Try stretching the field and drawing and layout of all within your class.

• Custom button on a touch paint problem

  I have a custom button that I use to the pop-up window of a PopupScreen. The custom button has his own painting methods (he also replaces the applyTheme() method), and for the most part, everything works as expected.

  The only problem I have is when the button is pressed. If I press and hold the button, the button is redrawn with what seems to be the default paint scheme (it seems that it is painted without label as well). As soon as I release the button and the context menu is displayed, the button is redrawn with my custom methods and look as I hope.

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  If navigationClick is treated by default? This is the root of the problem: I think that integrated ButtonField.navigationClick defines the Visual status of the "active" field Replace to do what you want it to do and do not call super.navigationClick (well, call of may when the status parameter is not 0 - in the case of Alt-click and make shift-click - and you don't want to deal with yourself).

• Development/unfocus field custom button problem

  Hi all

  I have something weird happens.  I have a custom button field that swaps the images based on a focused state or blur.  I have been using this field custom for awhile now, and I have never had any problems.  Imagine the following provision:

  ______________    ________________________

  | Custom button |    | BasicEditField |

  ------------------------    ------------------------------------------

  When my screen is launched, the focus is on the custom button.  If I move the trackball in a downward movement, the focus is taken the custom button, and its background image changes adequately to what has been defined in the untargeted State.  The BasicEditField then has the focus.  This is the correct behavior.

  If, however, I move the trackball in a movement to the right to the BasicEditField, then the BasicEditField will indeed get the focus, however the custom button field always displays its "highlight" picture  Using print statements, I was able to determine that when I move in a movement to the right with the trackball, the custom field button loses the focus and then gets the focus back to back, that's why it shows the highlighted image.

  Additional info:  This isn't an issue on touch devices, and custom button Manager is a TableLayoutManager.

  Any ideas why this might be happening?  Here's the code to my custom button field:

  public class BitmapButtonField extends Field {
      private String text = "";
      private Bitmap bitmap;
      private Bitmap bitmapHighlight;
      private Bitmap b;
      private boolean highlighted;
  
      public BitmapButtonField(String image, String imageHighlight, long style) {
  
          super(style | Field.FOCUSABLE);
  
          this.bitmap = Bitmap.getBitmapResource(image);
          this.bitmapHighlight = Bitmap.getBitmapResource(imageHighlight);
  
          b = bitmap;
  
      }
  
      public BitmapButtonField(String text, String image, String imageHighlight,
              long style) {
  
          super(style | Field.FOCUSABLE);
  
          this.text = text;
          this.bitmap = Bitmap.getBitmapResource(image);
          this.bitmapHighlight = Bitmap.getBitmapResource(imageHighlight);
  
          b = bitmap;
  
      }
  
      protected void drawFocus(Graphics graphics, boolean on) {
          // Do nothing
      }
  
      public int getPreferredHeight() {
          return bitmap.getHeight();
      }
  
      public int getPreferredWidth() {
          return bitmap.getWidth();
      }
  
      protected void layout(int width, int height) {
          setExtent(getPreferredWidth(), getPreferredHeight());
      }
  
      protected boolean navigationClick(int status, int time) {
          fieldChangeNotify(1);
          return true;
      }
  
      protected void onFocus(int direction) {
          b = bitmapHighlight;
          invalidate();
          System.out.println("FOCUSED");
  
      }
  
      protected void onUnfocus() {
          b = bitmap;
          invalidate();
          System.out.println("UNFOCUSED");
      }
  
      protected void paint(Graphics graphics) {
  
          int topTextPadding = (b.getHeight() - getFont().getHeight()) / 2;
          int sideTextPadding = (b.getWidth() - getFont().getAdvance(text)) / 2;
  
          graphics.drawBitmap(0, 0, getWidth(), getHeight(), b, 0, 0);
          graphics.setColor(Color.WHITE);
          if (text.length() > 0) {
              graphics.drawText(text, sideTextPadding, topTextPadding,
                      Graphics.ELLIPSIS, b.getWidth());
          }
      }
  }
  

  Have you looked at navigationMovement in the TableLayoutManager?  I confess that I rewrote it because it handles no left and right as I wanted.  Perhaps, you might be able to do the same thing.

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  I've done some custom buttons (extends the scope) and overrided the navigation click on it:

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  I put these buttons in a GridFieldManager, but the setChangeListener event is never caught when I click on the button... any idea?

  Thank you!

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