Database Users

Direct X and PNG Transparency on WM6.1 with .Net CF3.5

Hi all,
I'm trying to have transparent PNGs on my screen.
What is the best way to doing this ? I'm in C#, I tried DirectX, but it doesn't work.
What am I doing wrong ?
My code :
Code:
using System;
using System.Drawing;
using System.Windows.Forms;
using Microsoft.WindowsMobile.DirectX;
using Microsoft.WindowsMobile.DirectX.Direct3D;
using System.Runtime.InteropServices;
namespace Microsoft.Samples.MD3DM
{
// The main class for this sample
public class SimpleSMS : Form
{
// Our global variables for this project
Device device = null;
Texture texture = null;
Sprite sprite = null;
Rectangle rect;
public SimpleSMS()
{
// Set the caption
this.Text = "SimpleSMS";
this.MinimizeBox = false;
}
// Prepare the rendering device
public bool InitializeGraphics()
{
try
{
// Now let's setup our D3D parameters
PresentParameters presentParams = new PresentParameters();
presentParams.Windowed = true;
presentParams.SwapEffect = SwapEffect.Discard;
device = new Device(0, DeviceType.Default, this, CreateFlags.None, presentParams);
this.OnCreateDevice(device, null);
}
catch (DirectXException)
{
return false;
}
return true;
}
void OnCreateDevice(object sender, EventArgs e)
{
texture = TextureLoader.FromFile(device, @"badge.png");
sprite = new Sprite(device);
rect = new Rectangle(0, 0, 48, 48);
}
// All rendering for each frame occurs here
private void Render()
{
if (device != null)
{
device.Clear(ClearFlags.Target, System.Drawing.Color.Black, 1.0f, 0);
//Begin the scene
device.BeginScene();
device.RenderState.SourceBlend = Blend.SourceAlpha;
device.RenderState.DestinationBlend = Blend.InvSourceAlpha;
device.RenderState.AlphaBlendEnable = true;
sprite.Begin(SpriteFlags.AlphaBlend);
sprite.Draw(texture, rect, new Vector3(0.0f, 0.0f, 0.0f), new Vector3(100.0f, 100.0f, 0.0f), Color.White.ToArgb());
sprite.End();
//End the scene
device.EndScene();
device.Present();
}
}
// Called to repaint the window
protected override void OnPaint(System.Windows.Forms.PaintEventArgs e)
{
// Render on painting
this.Render();
// Render again
this.Invalidate();
}
// Called to repaint the window background
protected override void OnPaintBackground(
System.Windows.Forms.PaintEventArgs e)
{
// Do nothing to ensure that the rendering area is not overdrawn
}
// Close the window when Esc is pressed
protected override void OnKeyPress(
System.Windows.Forms.KeyPressEventArgs e)
{
// Esc was pressed
if ((int)(byte)e.KeyChar == (int)System.Windows.Forms.Keys.Escape)
this.Close();
}
/// <summary>
/// The main entry point for the application.
/// </summary>
static void Main()
{
SimpleSMS frm = new SimpleSMS();
// Initialize Direct3D
if (!frm.InitializeGraphics())
{
MessageBox.Show("Could not initialize Direct3D. " +
"This tutorial will exit.");
return;
}
Application.Run(frm);
}
}
}
Thanks for answers,
Scuse my bad english :-/

Not sure this helps, but RLTODAY works very well with transparent pngs in any WM version, and recently he released the source code:
http://rotlaus-software.de/forum/index.php?topic=1847.0

You can use ImagingFactory in OpenNETCF or other wrapper over the internet. PNGs with alpha work work for me.

AlphaControls
There is a project on Codeplex that can help you with transparency called AlphaControls. Also have a look on codeproject at the iPhone app clone

moneytoo said:
You can use ImagingFactory in OpenNETCF or other wrapper over the internet. PNGs with alpha work work for me.
Click to expand...
Click to collapse
Thank you all for answers ...
I tried OpenNetCF, without any result.
Do you have a piece of code in example ?

Try this:
http://www.codeplex.com/alphamobilecontrols
Or this:
http://johan.andersson.net/blog/2007/10/solution-for-transparent-images-on.html

New Developer - Need Some Advise on RSS Code

Hello,
I'm new to developing software in Java, but especially with Android. I am going through a tutorial on how to create an RSS Feed Reader and so far I've got it mostly working, but I've got a few bugs I can't seem to figure out.
I wanted to post images, but it wouldn't let me, but anyway:
main activity - title, pubdate both work, as does each article's title.
after clicking on a title, the other activity is launched and the article is shown:
showdescription activity is launched - title, pubdate, link all work and display correctly.
bug: description does not always display everything or even display at all depending on the xml source.
I'm wondering if my problem is somewhere these code snippets, as this tutorial was written some time ago.
These are pretty basic, so I'm doubting the problem is in here.
RSSHandler said:
if (localName.equals("description"))
{
currentstate = RSS_DESCRIPTION;
return;
}
...
case RSS_DESCRIPTION:
_item.setDescription(theString);
currentstate = 0;
break;
Click to expand...
Click to collapse
RSSItem said:
void setDescription(String description)
{
_description = description;
}
...
String getDescription()
{
return _description;
}
Click to expand...
Click to collapse
This is where I believe the problem exists, in the onItemClick method or the ShowDescription class.
RSSReader said:
public void onItemClick(AdapterView parent, View v, int position, long id)
{
Log.i(tag,"item clicked! [" + feed.getItem(position).getTitle() + "]");
Intent itemintent = new Intent(this,ShowDescription.class);
Bundle b = new Bundle();
b.putString("title", feed.getItem(position).getTitle());
b.putString("description", feed.getItem(position).getDescription());
b.putString("link", feed.getItem(position).getLink());
b.putString("pubdate", feed.getItem(position).getPubDate());
itemintent.putExtra("android.intent.extra.INTENT", b);
//startSubActivity(itemintent, 0);
startActivity(itemintent);
}
Click to expand...
Click to collapse
ShowDescription said:
public class ShowDescription extends Activity
{
public void onCreate(Bundle icicle)
{
super.onCreate(icicle);
setContentView(R.layout.showdescription);
String theStory = null;
Intent startingIntent = getIntent();
if (startingIntent != null)
{
Bundle b = startingIntent.getBundleExtra("android.intent.extra.INTENT");
if (b == null)
{
theStory = "bad bundle?";
}
else
{
theStory = b.getString("title")
+ "\n\n" + b.getString("pubdate")
+ "\n\n" + b.getString("description")
+ "\n\nView Website:\n" + b.getString("link");
}
}
else
{
theStory = "Information Not Found.";
}
TextView db= (TextView) findViewById(R.id.storybox);
db.setText(theStory);
Button backbutton = (Button) findViewById(R.id.back);
backbutton.setOnClickListener(new Button.OnClickListener()
{
public void onClick(View v)
{
finish();
}
});
}
}
Click to expand...
Click to collapse
Originally the tutorial called for "startSubActivity" for starting the ShowDescription activity, but that doesn't seem to exist anymore?
The XML source I'm using can't be displayed because I can't link in outside pages, but I can PM it to you if you'd like.
I have tried using a .replaceAll("\\<.*?>","") but it didn't seem to change much about whether the <description> tag's content is displayed or not.
Anyway, if anyone takes the time to look at this, it'd be greatly appreciated, and thank you!
If you need me to post anymore code let me know.

So I think I've figured it out, well somewhat.
While stepping through the code, the <description> tag's content consists of a single < character. Then the parser goes through two more tags that contain, p and > before actually hitting the content I want.
So it looks something like this:
<description>
<
<?>
p
<?>
>
<?>
"wanted content"
</?>
</?>
</?>
</description>
Click to expand...
Click to collapse

Paint with the finger

Hello to all!
I have not participated much in the forum, though I have been reading you for a while So... I am going to ask for your help
I'm trying to make a custom paint with the finger (to draw, to take notes, whatever) and I'm having some troubles.
Up to now, from what I have read, I'm using a class extended from View implementing OnTouchListener , and using the onDraw() method, with the onTouch event. I detect when the screen is touched (pressed, or dragged to "paint" in the screen) with the onTouch method, store the last point in an array, and in the onDraw method, I paint all the array.
-As my knowledge goes, in the onDraw method, you have to re-paint all the canvas (this is translated to my problem, to repaint all the stroke or "painting"). Is this correct or I am doing anything wrong? Is there any way to only update the current canvas, and not have to re-paint all the screen? Maybe using othe classes or other methods, but I have found nothing in the net (maybe I'm not looking in the correct places).
- The second problem I found is that when I drag the finger across the screen, sometimes the ontouch method doesen't capture all the points I have "touched" with the finger. I mean, I don't want to capture ALL the points, but when I drag the finger with moderate speed (not very fast) there are important gaps in between. Is there a way to optimize this and try to capture more points in between?
So far, this is the code I have relevant to the issues I'm explaining:
I'm trying to copy the code but I get a error (It sais I can not post outside links, but I'm not posting any links, just the code)
Code:
private ArrayList<PointStroke > stroke= new ArrayList<PointStroke >();
protected void onDraw(Canvas canvas) {
Paint p = new Paint();
p.setColor(Color.RED);
int signLength = stroke.size();
PointStroke pf;
PointStroke pfant;
for (int index = 0; index < signLength; index++) {
pf = stroke.get(index);
canvas.drawCircle(pf.x,pf.y,7,p);
if (index > 0 ) {
pfant = stroke.get(index-1);
canvas.drawLine(pfant.x, pfant.y, pf.x, pf.y, p);
}
}
canvas.drawCircle(x,y,7,p);
invalidate();
}
@Override
public boolean onTouch(View v, MotionEvent event) {
x = event.getX();
y = event.getY();
pr = event.getPressure();
sz = event.getSize();
long now = System.currentTimeMillis();
stroke.add(new PointStroke(x,y,pr,sz,now));
return true;
}
private class PointStroke{
public float x;
public float y;
public float pr;
public float sz;
public long time;
public PointStroke(float newX, float newY, float newPR, float newSZ, long newTIME) {
x = newX;
y = newY;
pr = newPR;
sz = newSZ;
time = newTIME;
}
}
Thanks for all your answers and the time to read and answer!

[Q] Spinner problem

I have a little problem with my equations while using a spinner. What happens is user chooses option from spinner then enters three separate numbers in different EditText the calculation will perform as soon as the user hits the calculation button.
the originally return of the calculation is 0.0. until you again choose an option from the spinner and click calculate again. which then returns the correct answer.
thanks ahead of time.

Is there supposed to be a question in there somewhere?

Yeah sorry,
I guess I forgot to add the question.
Does anyone now why this is happening? should I put the onItemSelectionListener before the onClick. that part of the code looks somethink this.
Code:
btnCalc.setOnClickListener(new View.OnClickListener(){
public void onClick(View v) {
if ((ageEdit.getText().toString()== " " )
||(ageEdit.getText().length()== 0 )
||(heightEdit.getText().toString()== " ")
||(heightEdit.getText().length()== 0 )
||(weightEdit.getText().toString()== " ")
||(weightEdit.getText().length()== 0 )
)
{
showErrorAlert("Some Input are empty!",
input.getId());
}
else {
height = Double.parseDouble(txtwlHeight2.getText().toString());
weight = Double.parseDouble(txtwlWeight.getText().toString());
age = (int) Double.parseDouble(txtageinput01.getText().toString());
spnGender.setOnItemSelectedListener(new OnItemSelectedListener(){
public void onNothingSelected(AdapterView<?> arg0){}
@Override
public void onItemSelected(AdapterView<?> parent, View v, int position, long id) {
// TODO Auto-generated method stub{
switch (position){
case 0:
//some equation
break;
case 1:
//some equation
break;
}
}
});
// etc. such calculation out to text view.

Any Idea's anyone? I've does a lot of research and reading. Tried to re write code in different ways still no luck.. need help please.

n00b - need help with code

Hey all,
So Im a newbie learning Java and I am trying to take what I have learned and complete a simple project I came up with. Im just working working on a basic BMI calculator. I have to issues.... I cant get it to print the result and my scanner shows a output code when I run the program. Could somebody take a look and give me advice?
import java.util.Scanner;
public class calcBMI {
public static void main(String[] args) {
Scanner height = new Scanner(System.in);
startC startCObject = new startC();
System.out.println("Enter your height:");
System.out.println(height);
String temp = height.nextLine();
startCObject.setHeight(temp);
Scanner weight = new Scanner(System.in);
System.out.println("Enter your Weight:");
System.out.println(weight);
String temp1 = weight.nextLine();
startCObject.setWeight(temp1);
Scanner result = new Scanner(System.in);
System.out.println("BMI:" + result);
}}
Click to expand...
Click to collapse
and
public class startC {
//HEIGHT
private String enterH;
public void setHeight(String height) {
enterH = height;
}
public String getHeight() {
return enterH;
}
//WEIGHT
private String enterW;
public void setWeight(String weight) {
enterW = weight;
}
public String getWeight() {
return enterW;
}
//RESULT
private String ht, wt;
public void resHeight(String height) {
ht = height;
}
public String resheight() {
return ht;
}
//then
public void resWeight(String weight) {
wt = weight;
}
public String resweight() {
return wt;
}
//then
public String result; {
result = ht + wt;
}
public String getResult(String result) {
return result;
}
}
Click to expand...
Click to collapse

I don't think you can print a Scanner?
Also, you can use just one Scanner for both inputs, and it is good to also close them with scannerName.close(); when finished.
Try and get that sorted, then see what happens? Please post your code in the
Code:
and
tags too, then .

bassie1995 said:
I don't think you can print a Scanner?
Also, you can use just one Scanner for both inputs, and it is good to also close them with scannerName.close(); when finished.
Try and get that sorted, then see what happens? Please post your code in the
Code:
and
tags too, then .
Click to expand...
Click to collapse
Ah; sorry about that, and thank you for the info.
I actually ended up tearing the code down and rethinking it. I was making it far more difficult than it needed to be.
Here is what I have now which is working perfect. Pretty excited considering this is the first project I've done on my own.!
Code:
import java.util.Scanner;
public class theCalc {
public static void main(String[] args) {
// feet
System.out.println("Enter your height (Feet):");
Scanner scan = new Scanner(System.in);
double feet = scan.nextDouble();
// inches
System.out.println("Enter your height (Inches):");
double inches = scan.nextDouble();
// weight
System.out.println("Enter your weight:");
double weight = scan.nextDouble();
// convert to inches
double height = feet * 12 + inches;
// height squared
double htsqr = height * height;
// BMI formula
double htInchByWeight = weight / htsqr;
double BMI = htInchByWeight * 703;
// BMI =
System.out.println("Your BMI is: " + BMI);
}
}

Was thinking it to be a bit too complicated, but a good exercise with multiple classes and such. It looks much better now, and glad you got it working!
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