Java Development

[ravi1989]

How to add space in between two listfied .?

How to go one listfield to another using alt button ?

package com.black.applicationloader;

import java.util.Vector;

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.Manager;
import net.rim.device.api.ui.XYRect;
import net.rim.device.api.ui.component.ListField;
import net.rim.device.api.ui.component.ListFieldCallback;
import net.rim.device.api.ui.container.VerticalFieldManager;

import com.black.blackinterface.BlackInterface;
import com.black.common.BaseScreen;
import com.black.components.CustomEditField;
import com.black.utility.Utilities;

public class BlackSecondScreen extends BaseScreen implements BlackInterface,ListFieldCallback {
private VerticalFieldManager listFieldManager;
private VerticalFieldManager listFieldManager_2;
private static final String[] _elements = {"First element", "Second element", "Third element", "Fourth element", "Fifth element"};
private Vector _listElements = new Vector(_elements.length, 1);
int columnWidth = Display.getWidth()/4;
private boolean hasFocus; // =false
private CustomEditField userEditField;
ListField colourList_1;
ListField colourList_2;

BlackSecondScreen(){



colourList_1 = new ListField(){


protected void drawFocus(Graphics graphics, boolean on) {
XYRect rect = new XYRect();
graphics.setGlobalAlpha(200);
getFocusRect(rect);
drawHighlightRegion(graphics,HIGHLIGHT_FOCUS,true,rect.x,rect.y,rect.width,rect.height);
}

public void onFocus(int direction) {
hasFocus = true;
super.onFocus(direction);
}

// Invoked when a field loses the focus.
public void onUnfocus() {
hasFocus = false;
super.onUnfocus();
invalidate();
}

public int moveFocus(int amount, int status, int time) {
invalidate(getSelectedIndex());
return super.moveFocus(amount, status, time);
}
};

colourList_1.setCallback(this);
int elementLength = _elements.length;
for(int count = 0; count < elementLength; ++count)
{
colourList_1.insert(count);
this.insert(_elements[count], count);
}





colourList_2 = new ListField(){


protected void drawFocus(Graphics graphics, boolean on) {
XYRect rect = new XYRect();
graphics.setGlobalAlpha(200);
getFocusRect(rect);
drawHighlightRegion(graphics,HIGHLIGHT_FOCUS,true,rect.x,rect.y,rect.width,rect.height);
}


public void onFocus(int direction) {
hasFocus = true;
super.onFocus(direction);
}

// Invoked when a field loses the focus.
public void onUnfocus() {
hasFocus = false;
super.onUnfocus();
invalidate();
}

public int moveFocus(int amount, int status, int time) {
invalidate(getSelectedIndex());
return super.moveFocus(amount, status, time);
}
};

colourList_2.setCallback(this);

for(int count = 0; count < elementLength; ++count)
{
colourList_2.insert(count);
this.insert(_elements[count], count);
}

//add(colourList);
createComponents();
layoutComponents();

}

public void createComponents() {

listFieldManager= new VerticalFieldManager(Manager.VERTICAL_SCROLL|Manager.HORIZONTAL_SCROLL){
protected void sublayout(int maxWidth, int maxHeight) {
super.sublayout( maxWidth, 2*colourList_1.getRowHeight());
setExtent(maxWidth,2*colourList_1.getRowHeight());

};

};


listFieldManager_2= new VerticalFieldManager(Manager.VERTICAL_SCROLL|Manager.HORIZONTAL_SCROLL){
protected void sublayout(int maxWidth, int maxHeight) {
super.sublayout( maxWidth, 2*colourList_2.getRowHeight());
setExtent(maxWidth,2*colourList_2.getRowHeight());

};

};



// userEditField=new CustomEditField(Utilities.getAdjustedWidth(150),
// Utilities.getAdjustWidth(2), Manager.NO_HORIZONTAL_SCROLL
// | Manager.VERTICAL_SCROLL, true);

}

public void layoutComponents() {
// TODO Auto-generated method stub
listFieldManager.add(colourList_1);


listFieldManager_2.add(colourList_2);
add(listFieldManager);
add(listFieldManager_2);


}

public void initializeListeners() {
// TODO Auto-generated method stub

}

public void setComponentsXYMargins() {
// TODO Auto-generated method stub

}

public void drawListRow(ListField listField, Graphics graphics, int index,
int y, int width) {
int curSelected;
if (hasFocus) {
curSelected = listField.getSelectedIndex();
} else {
curSelected = -1;
}
if(index%2 == 0 ){
graphics.setColor(Color.PERU);
graphics.fillRect(0, y, width, listField.getRowHeight());
}else{
graphics.setColor(Color.WHEAT);
graphics.fillRect(0, y, width, listField.getRowHeight());
}
//graphics.fillRect(0,0,width,y);

int xpos = 0;int ypos = 0;
graphics.setFont(Font.getDefault());// please set a font value
// this is first column text
graphics.setColor(Color.BLACK);
graphics.drawText("column1"+index,xpos,y);
xpos += columnWidth;

graphics.setColor(Color.RED);
graphics.drawText("column2",xpos,y);

xpos += columnWidth;
graphics.drawText("column3",xpos,y);

xpos += columnWidth;

graphics.drawText("column4",xpos,y);

}

public Object get(ListField listField, int index) {
// TODO Auto-generated method stub
return _listElements.elementAt(index);
}

public int getPreferredWidth(ListField listField) {
// TODO Auto-generated method stub
return Graphics.getScreenWidth();
}

public int indexOfList(ListField listField, String prefix, int start) {
// TODO Auto-generated method stub
return _listElements.indexOf(prefix, start);
}

public void insert(String toInsert, int index)
{
_listElements.insertElementAt(toInsert, index);
}

public void erase()
{
_listElements.removeAllElements();
}

}

[simon_hain]

you can either add a field in between the listfields or use setMargin to give them a margin.

[ravi1989]

Hi any other method to to space in between two list field.

for my suggestion :increase the size of manager (sublayout size example 200 height) and list field (layout method height 100)..may be there is difference 100 px in between the second fiels may i correct..?

Please suggest me how to do go one list field to another listfield on pressing any button? actually i have two listfield in my screen can you please tell me how to switch one listfield to another ?

Thanks

[meghana_datar]

As explained before by simon setMargin is the best method to do this. All you need to do is eg:

hfm is intsnce of your manager.

the only thing you need to do is 

hfm.setMargin(int top,int right,int bottom,it left);

no you want spce between 2 managers say hfm,hfm1 .

So you need to just have

hfm.setMargin(10,0,10,0);

this will set margin on top of ur manager where you add list field and to bottom .

[ravi1989]

what about second question..?

[meghana_datar]

can you please explan the second point briefly. Didnt get what exaclty you want to say.

[ravi1989]

Hello

actually i have 2 listfield in my screen .i  want to to toggle the focus(between listfield) on pressing any button  example (alt).actually the problem is that in blackberry there is defult functionality focus never go to next field till it complete the first . example if there is 50 element in listfield user never goes to next list field (which is below first) till it scroll last element in row.

so i want if user click alt button it goes to below listfield .if user again press same alt button it goes to upper list above this.

Thanks

[simon_hain]

setFocus should do the trick, maybe in conjunction with setSelectedIndex

[ravi1989 · Accepted solution]

Hi

Not able to understant please explain..

[ravi1989]

package com.black.applicationloader;

import java.util.Vector;

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.Manager;
import net.rim.device.api.ui.XYRect;
import net.rim.device.api.ui.component.Dialog;
import net.rim.device.api.ui.component.ListField;
import net.rim.device.api.ui.component.ListFieldCallback;
import net.rim.device.api.ui.container.VerticalFieldManager;

import com.black.blackinterface.BlackInterface;
import com.black.common.BaseScreen;
import com.black.components.CustomEditField;
import com.black.utility.Utilities;

public class BlackSecondScreen extends BaseScreen implements BlackInterface,ListFieldCallback {
	 private VerticalFieldManager listFieldManager;
	 private VerticalFieldManager listFieldManager_2;
	 private static final String[] _elements = {"First element", "Second element", "Third element", "Fourth element", "Fifth element"};
	 private Vector _listElements = new Vector(_elements.length, 1);
	 int columnWidth  = Display.getWidth()/4;
	 private boolean hasFocus; // =false
	private CustomEditField userEditField;
	ListField colourList_1;
	ListField colourList_2;
	
	BlackSecondScreen(){
		
		
		
		colourList_1 = new ListField(){
			
			protected boolean keyChar(char key, int status, int time) {
				
				//Dialog.alert(""+key);
				return true;
			};
			protected boolean keyDown(int keycode, int time) {
				Dialog.alert(""+keycode);
				return true;
			};
			
			protected boolean keyUp(int keycode, int time) {
				//Dialog.alert(""+keycode);
				return true;
			};
			protected void drawFocus(Graphics graphics, boolean on) {
				
				hasFocus = true;
				super.drawFocus(graphics, on);
				
//				XYRect rect = new XYRect();
//			     graphics.setGlobalAlpha(200);
//				getFocusRect(rect);
//				drawHighlightRegion(graphics,HIGHLIGHT_FOCUS,true,rect.x,rect.y,rect.width,rect.height);
			}
			
			public void onFocus(int direction) {
				hasFocus = true;
				super.onFocus(direction);
			}

			// Invoked when a field loses the focus.
			public void onUnfocus() {
				hasFocus = false;
				super.onUnfocus();
				invalidate();
			}
			
			public int moveFocus(int amount, int status, int time) {
				invalidate(getSelectedIndex());
				return super.moveFocus(amount, status, time);
			}
		};
		
		colourList_1.setCallback(this);
		  int elementLength = _elements.length;
		 for(int count = 0; count < elementLength; ++count)
	        {
			 colourList_1.insert(count);
	            this.insert(_elements[count], count);
	        }
		 
		 
		 
		 
		 
		 colourList_2 = new ListField(){
				
				
				protected void drawFocus(Graphics graphics, boolean on) {
					//hasFocus = true;
					super.drawFocus(graphics, on);
					//hasFocus = false;
//					XYRect rect = new XYRect();
//				graphics.setGlobalAlpha(200);
//					getFocusRect(rect);
//					drawHighlightRegion(graphics,HIGHLIGHT_FOCUS,true,rect.x,rect.y,rect.width,rect.height);
				}
			
				
				public void onFocus(int direction) {
					hasFocus = true;
					super.onFocus(direction);
				}

				// Invoked when a field loses the focus.
				public void onUnfocus() {
					hasFocus = false;
					super.onUnfocus();
					invalidate();
				}
				
				public int moveFocus(int amount, int status, int time) {
					invalidate(getSelectedIndex());
					return super.moveFocus(amount, status, time);
				}
			};
			
			colourList_2.setCallback(this);
			  
			 for(int count = 0; count < elementLength; ++count)
		        {
				 colourList_2.insert(count);
		            this.insert(_elements[count], count);
		        }
		 
		 //add(colourList);
		 createComponents();
		 layoutComponents();
		
	}

	public void createComponents() {
		
		listFieldManager= new VerticalFieldManager(Manager.VERTICAL_SCROLL|Manager.HORIZONTAL_SCROLL){
			protected void sublayout(int maxWidth, int maxHeight) {
				 super.sublayout( maxWidth, 2*colourList_1.getRowHeight());
				    setExtent(maxWidth,2*colourList_1.getRowHeight()); 
				
			};
			
		};
		
		
		listFieldManager_2= new VerticalFieldManager(Manager.VERTICAL_SCROLL|Manager.HORIZONTAL_SCROLL){
			protected void sublayout(int maxWidth, int maxHeight) {
				 super.sublayout( maxWidth, 2*colourList_2.getRowHeight());
				    setExtent(maxWidth,2*colourList_2.getRowHeight()); 
				
			};
			
		};
		
		
		
//		userEditField=new CustomEditField(Utilities.getAdjustedWidth(150),
//				Utilities.getAdjustWidth(2), Manager.NO_HORIZONTAL_SCROLL
//				| Manager.VERTICAL_SCROLL, true);
		
	}

	public void layoutComponents() {
		// TODO Auto-generated method stub
		listFieldManager.add(colourList_1);
		
		
		listFieldManager_2.add(colourList_2);
		
		
		listFieldManager.setMargin(0,0,40,0);
		add(listFieldManager);
		add(listFieldManager_2);
		
		
	}

	public void initializeListeners() {
		// TODO Auto-generated method stub
		
	}

	public void setComponentsXYMargins() {
		// TODO Auto-generated method stub
		
	}

	public void drawListRow(ListField listField, Graphics graphics, int index,
			int y, int width) {
		int curSelected;
		    if(!hasFocus){
		    if(index%2  == 0){
			
			graphics.setColor(Color.RED); 
			graphics.fillRect(0, y, width, listField.getRowHeight());
			graphics.setColor(Color.WHITE); 
			
			}else{
			graphics.setColor(Color.BLACK); 
			graphics.fillRect(0, y, width, listField.getRowHeight());
			}
		    }
			//graphics.fillRect(0,0,width,y);
			 
			int xpos = 0;int ypos = 0;
			graphics.setFont(Font.getDefault());// please set a font value
			// this is first column text
			graphics.setColor(Color.PINK); 
			graphics.drawText("column1"+index,xpos,y);
			xpos +=  columnWidth;
			 
			//graphics.setColor(Color.RED); 
			graphics.drawText("column2",xpos,y);
			 
			xpos +=  columnWidth;
			graphics.drawText("column3",xpos,y);
			 
			xpos +=  columnWidth;
			 
			graphics.drawText("column4",xpos,y);
		
	}

	public Object get(ListField listField, int index) {
		// TODO Auto-generated method stub
		 return _listElements.elementAt(index);
	}

	public int getPreferredWidth(ListField listField) {
		// TODO Auto-generated method stub
		return Graphics.getScreenWidth();
	}

	public int indexOfList(ListField listField, String prefix, int start) {
		// TODO Auto-generated method stub
		return _listElements.indexOf(prefix, start);
	}
	
	public void insert(String toInsert, int index) 
    {
        _listElements.insertElementAt(toInsert, index);
    }
	
	 public void erase() 
	    {
	        _listElements.removeAllElements();
	    }
	

}

 i am using this code not able to go next screen..