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  • Any sense to set obj = null(Nothing) in Dispose()?

    - by serhio
    Is there any sense to set custom object to null(Nothing in VB.NET) in the Dispose() method? Could this prevent memory leaks or it's useless?! Let's consider two examples: public class Foo : IDisposable { private Bar bar; // standard custom .NET object public Foo(Bar bar) { this.bar = bar; } public void Dispose() { bar = null; // any sense? } } public class Foo : RichTextBox { // this could be also: GDI+, TCP socket, SQl Connection, other "heavy" object private Bitmap backImage; public Foo(Bitmap backImage) { this.backImage = backImage; } protected override void Dispose(bool disposing) { if (disposing) { backImage = null; // any sense? } } }

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  • C# Hotkey, Help?

    - by Di4g0n4leye
    namespace WebBrowser { public partial class MainForm : Form { public MainForm() { InitializeComponent(); } int GetPixel(int x, int y) { Bitmap bmp = new Bitmap(1, 1, PixelFormat.Format32bppPArgb); Graphics grp = Graphics.FromImage(bmp); grp.CopyFromScreen(new Point(x,y), Point.Empty, new Size(1,1)); grp.Save(); return bmp.GetPixel(0, 0).ToArgb(); } void Button1Click(object sender, EventArgs e) { int x = Cursor.Position.X; int y = Cursor.Position.Y; int pixel = GetPixel(x,y); textBox1.Text = pixel.ToString(); } void MainFormLoad(object sender, EventArgs e) { webBrowser1.Navigate("http://google.com"); } } } } How i want to add a hotkey that call Button1 on Press? How can that be done?

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  • Windows splash screen using GDI+

    - by Luther
    The eventual aim of this is to have a splash screen in windows that uses transparency but that's not what I'm stuck on at the moment. In order to create a transparent window, I'm first trying to composite the splash screen and text on an off screen buffer using GDI+. At the moment I'm just trying to composite the buffer and display it in response to a 'WM_PAINT' message. This isn't working out at the moment; all I see is a black window. I imagine I've misunderstood something with regards to setting up render targets in GDI+ and then rendering them (I'm trying to render the screen using straight forward GDI blit) Anyway, here's the code so far: //my window initialisation code void MyWindow::create_hwnd(HINSTANCE instance, const SIZE &dim) { DWORD ex_style = WS_EX_LAYERED ; //eventually I'll be making use of this layerd flag m_hwnd = CreateWindowEx( ex_style, szFloatingWindowClass , L"", WS_POPUP , 0, 0, dim.cx, dim.cy, null, null, instance, null); SetWindowLongPtr(m_hwnd ,0, (__int3264)(LONG_PTR)this); m_display_dc = GetDC(NULL); //This was sanity check test code - just loading a standard HBITMAP and displaying it in WM_PAINT. It worked fine //HANDLE handle= LoadImage(NULL , L"c:\\test_image2.bmp", IMAGE_BITMAP, 0, 0, LR_LOADFROMFILE); m_gdip_offscreen_bm = new Gdiplus::Bitmap(dim.cx, dim.cy); m_gdi_dc = Gdiplus::Graphics::FromImage(m_gdip_offscreen_bm);//new Gdiplus::Graphics(m_splash_dc );//window_dc ;m_splash_dc //this draws the conents of my splash screen - this works if I create a GDI+ context for the window, rather than for an offscreen bitmap. //For all I know, it might actually be working but when I try to display the contents on screen, it shows a black image draw_all(); //this is just to show that drawing something simple on the offscreen bit map seems to have no effect Gdiplus::Pen pen(Gdiplus::Color(255, 0, 0, 255)); m_gdi_dc->DrawLine(&pen, 0,0,100,100); DWORD last_error = GetLastError(); //returns '0' at this stage } And here's the snipit that handles the WM_PAINT message: ---8<----------------------- //Paint message snippit case WM_PAINT: { BITMAP bm; PAINTSTRUCT ps; HDC hdc = BeginPaint(vg->m_hwnd, &ps); //get the HWNDs DC HDC hdcMem = vg->m_gdi_dc->GetHDC(); //get the HDC from our offscreen GDI+ object unsigned int width = vg->m_gdip_offscreen_bm->GetWidth(); //width and height seem fine at this point unsigned int height = vg->m_gdip_offscreen_bm->GetHeight(); BitBlt(hdc, 0, 0, width, height, hdcMem, 0, 0, SRCCOPY); //this blits a black rectangle DWORD last_error = GetLastError(); //this was '0' vg->m_gdi_dc->ReleaseHDC(hdcMem); EndPaint(vg->m_hwnd, &ps); //end paint return 1; } ---8<----------------------- My apologies for the long post. Does anybody know what I'm not quite understanding regarding how you write to an offscreen buffer using GDI+ (or GDI for that matter)and then display this on screen? Thank you for reading.

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  • How to index a date column with null values?

    - by Heinz Z.
    How should I index a date column when some rows has null values? We have to select rows between a date range and rows with null dates. We use Oracle 9.2 and higher. Options I found Using a bitmap index on the date column Using an index on date column and an index on a state field which value is 1 when the date is null Using an index on date column and an other granted not null column My thoughts to the options are: to 1: the table have to many different values to use an bitmap index to 2: I have to add an field only for this purpose and to change the query when I want to retrieve the null date rows to 3: locks tricky to add an field to an index which is not really needed What is the best practice for this case? Thanks in advance Some infos I have read: Oracle Date Index When does Oracle index null column values?

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  • Why would GDI+ colours vary based off whether a tooltip is visible?

    - by dlanod
    I'm displaying a bitmap using GDI+. After loading the bitmap from a DLL resource I set the background colour (blue - #0000FF) to transparent using TransparentBlt. On Windows Vista and later this works as expected. However, on a Windows XP system we're testing on this only works when any tooltip (e.g. the "title" property in IE, or Windows Explorer's tooltip shown when hovering the mouse over a file, etc) is displayed. The rest of the time the background colour is still blue. Has anyone encountered this before, or know of a way to stop this occurring and for the blue to be properly made transparent?

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  • C#: Why am I getting "the process cannot access the file * because it is being used by another proce

    - by zxcvbnm
    I'm trying to convert bmp files in a folder to jpg, then delete the old files. The code works fine, except it can't delete the bmp's. DirectoryInfo di = new DirectoryInfo(args[0]); FileInfo[] files = di.GetFiles("*.bmp"); foreach (FileInfo file in files) { string newFile = file.FullName.Replace("bmp", "jpg"); Bitmap bm = (Bitmap)Image.FromFile(file.FullName); bm.Save(newFile, ImageFormat.Jpeg); } for (int i = 0; i < files.Length; i++) files[i].Delete(); The files aren't being used by another program/process like the error indicates, so I'm assuming the problem is here. But to me the code seems fine, since I'm doing everything sequentially. This is all that there is to the program too, so the error can't be caused by code elsewhere.

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  • Is it possible to set ContentType for a WCF WebGet method?

    - by James Cadd
    I'm working with a WCF restful/http method that returns a stream of image data. I want to make sure that the content type is marked as "image/png". The method is defined as: [ServiceContract] [AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)] [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall)] public class TileImageService { [WebGet(UriTemplate = "{id}")] public Stream GetTileImage(string id) { Bitmap bmp = new Bitmap(173, 173); Graphics g = Graphics.FromImage(bmp); g.Clear(Color.Blue); g.DrawString(DateTime.Now.ToLongTimeString(), new Font("Chiller", 20), Brushes.White, new PointF(10, 10)); g.Flush(); MemoryStream ms = new MemoryStream(); bmp.Save(ms, ImageFormat.Png); ms.Seek(0, SeekOrigin.Begin); return ms; } } In Firefox it looks like the content type is marked as application/octet stream. Is there a way to change the content type?

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  • efficient way to detect if an image is empty

    - by Jos
    Hi, I need a very fast method to detect if an image is empty. Im my case then all pixels are white and transparant. The images are png's. My current method is to load them in a memory bitmap and check each pixel value, but this is way to slow. Is there a more efficient way? This is my current code: 'Lock the bitmap bits. Dim bmpData As System.Drawing.Imaging.BitmapData = bmp.LockBits(rectBmp, _ Drawing.Imaging.ImageLockMode.ReadOnly, bmp.PixelFormat) Try Dim x As Integer Dim y As Integer For y = 0 To bmpData.Height - 1 For x = 0 To bmpData.Width - 1 If System.Runtime.InteropServices.Marshal.ReadByte(bmpData.Scan0, (bmpData.Stride * y) + (4 * x) + 3) <> 0 Then Return True Exit For End If Next Next Finally bmp.UnlockBits(bmpData) End Try

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  • Android Canvas.DrawBitmap without blurring/AntiAliasing?

    - by Sh33p
    I'm trying to make an android game using sprites, (or very pixelated characters, backgrounds etc.). I draw them on the canvas like so... matrix.preScale(xrat,yrat); canvas.drawBitmap(img, matrix, null); Where img is the Bitmap and the xrat and yrat are the scales. My problem is that when I test, the Bitmap is blurry or anti-aliased, is there a way to prevent this? The rigid-blocky art style of the game will be ruined if the blocks are blurry. Any (ANY) help appreciated!

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  • OpenGL, how to set a monochrome texture to a colored shape?

    - by Santiago
    I'm developing on Android with OpenGL ES, I draw some cubes and I change its colors with glColor4f. Now, what I want is to give a more realistic effect on the cubes, so I create a monochromatic 8bit depth, 64x64 pixel size PNG file. I loaded on a texture, and here is my problem, witch is the way to combine the color and the texture to get a colorized and textured cubes onto the screen? I'm not an expert on OpenGL, I tried this: On create: public void asignBitmap(GL10 gl, Bitmap bitmap) { int[] textures = new int[1]; gl.glGenTextures(1, textures, 0); mTexture = textures[0]; gl.glBindTexture(GL10.GL_TEXTURE_2D, mTexture); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_NEAREST); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_CLAMP_TO_EDGE); gl.glTexEnvf(GL10.GL_TEXTURE_ENV, GL10.GL_TEXTURE_ENV_MODE, GL10.GL_REPLACE); GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GL10.GL_ALPHA, bitmap, 0); ByteBuffer tbb = ByteBuffer.allocateDirect(texCoords.length * 4); tbb.order(ByteOrder.nativeOrder()); mTexBuffer = tbb.asFloatBuffer(); for (int i = 0; i < 48; i++) mTexBuffer.put(texCoords[i]); mTexBuffer.position(0); } And OnDraw: public void draw(GL10 gl, int alphawires) { gl.glColor4f(1.0f, 0.0f, 0.0f, 0.5f); //RED gl.glBindTexture(GL10.GL_TEXTURE_2D, mTexture); gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA); gl.glEnable(GL10.GL_TEXTURE_2D); gl.glEnable(GL10.GL_BLEND); gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY); gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, mTexBuffer); //Set the face rotation gl.glFrontFace(GL10.GL_CW); //Point to our buffers gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertexBuffer); //Enable the vertex and color state gl.glEnableClientState(GL10.GL_VERTEX_ARRAY); //Draw the vertices as triangles, based on the Index Buffer information gl.glDrawElements(GL10.GL_TRIANGLES, 36, GL10.GL_UNSIGNED_BYTE, indexBuffer); //Disable the client state before leaving gl.glDisableClientState(GL10.GL_VERTEX_ARRAY); gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY); gl.glDisable(GL10.GL_BLEND); gl.glDisable(GL10.GL_TEXTURE_2D); } I'm even not sure if I have to use a blend option, because I don't need transparency, but is a plus :)

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  • Mono Ignores Graphics.InterpolationMode?

    - by Timothy Baldridge
    I have a program that draws some vector graphics using System.Drawing and the Graphics class. The anti-aliasing works, kindof okay, but for my need I neede oversampling, so I create the starting image to be n times larger and then scale back the final image by n. On Window and .NET the resulting image looks great! However, on Mono 2.4.2.3 (Ubuntu 9.10 stock install), the intropolation is horrible. Here's how I'm scaling my images: Bitmap bmp = new Bitmap(Bmp.Width / OverSampling, Bmp.Height / OverSampling); Graphics g = Graphics.FromImage(bmp); g.InterpolationMode = InterpolationMode.HighQualityBicubic; g.DrawImage(Bmp, 0, 0, bmp.Width, bmp.Height); g.Dispose(); From what I can tell there is no interpolation happening at all. Any ideas?

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  • OpenGL, how to set a monocrome texture to a colored shape?

    - by Santiago
    I'm developing on Android with OpenGL ES, I draw some cubes and I change its colors with glColor4f. Now, what I want is to give a more realistic effect on the cubes, so I create a monochromatic 8bit depth, 64x64 pixel size PNG file. I loaded on a texture, and here is my problem, witch is the way to combine the color and the texture to get a colorized and textured cubes onto the screen? I'm not an expert on OpenGL, I tried this: On create: public void asignBitmap(GL10 gl, Bitmap bitmap) { int[] textures = new int[1]; gl.glGenTextures(1, textures, 0); mTexture = textures[0]; gl.glBindTexture(GL10.GL_TEXTURE_2D, mTexture); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_NEAREST); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_CLAMP_TO_EDGE); gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_CLAMP_TO_EDGE); gl.glTexEnvf(GL10.GL_TEXTURE_ENV, GL10.GL_TEXTURE_ENV_MODE, GL10.GL_REPLACE); GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, GL10.GL_ALPHA, bitmap, 0); ByteBuffer tbb = ByteBuffer.allocateDirect(texCoords.length * 4); tbb.order(ByteOrder.nativeOrder()); mTexBuffer = tbb.asFloatBuffer(); for (int i = 0; i < 48; i++) mTexBuffer.put(texCoords[i]); mTexBuffer.position(0); } And OnDraw: public void draw(GL10 gl, int alphawires) { gl.glColor4f(1.0f, 0.0f, 0.0f, 0.5f); //RED gl.glBindTexture(GL10.GL_TEXTURE_2D, mTexture); gl.glBlendFunc(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA); gl.glEnable(GL10.GL_TEXTURE_2D); gl.glEnable(GL10.GL_BLEND); gl.glEnableClientState(GL10.GL_TEXTURE_COORD_ARRAY); gl.glTexCoordPointer(2, GL10.GL_FLOAT, 0, mTexBuffer); //Set the face rotation gl.glFrontFace(GL10.GL_CW); //Point to our buffers gl.glVertexPointer(3, GL10.GL_FLOAT, 0, vertexBuffer); //Enable the vertex and color state gl.glEnableClientState(GL10.GL_VERTEX_ARRAY); //Draw the vertices as triangles, based on the Index Buffer information gl.glDrawElements(GL10.GL_TRIANGLES, 36, GL10.GL_UNSIGNED_BYTE, indexBuffer); //Disable the client state before leaving gl.glDisableClientState(GL10.GL_VERTEX_ARRAY); gl.glDisableClientState(GL10.GL_TEXTURE_COORD_ARRAY); gl.glDisable(GL10.GL_BLEND); gl.glDisable(GL10.GL_TEXTURE_2D); } I'm even not sure if I have to use a blend option, because I don't need transparency, but is a plus :) Thank's

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  • Android Expandable List View Update

    - by Gaurav Arora
    I am implementing a chatting application, where I have made a service to listen all the presence changed. On the change of the presence I want to update the data and I am unable to update the data that is showing in the expandable list view. Please suggest me a means to do the same. public class UserMenuActivity extends ExpandableListActivity { private XMPPConnection connection; String name,availability,subscriptionStatus; TextView tv_Status; /** Variable Define here */ private String[] data = { "View my profile", "New Multiperson Chat", "New Broad Cast Message", "New Contact Category", "New Group", "Invite to CCM", "Search", "Expand All", "Settings", "Help", "Close" }; private String[] data_Contact = { "Rename Category","Move Contact to Category", "View my profile", "New Multiperson Chat", "New Broad Cast Message", "New Contact Category", "New Group", "Invite to CCM", "Search", "Expand All", "Settings", "Help", "Close" }; private String[] data_child_contact = { "Open chat", "Delete Contact","View my profile", "New Multiperson Chat", "New Broad Cast Message", "New Contact Category", "New Group", "Invite to CCM", "Search", "Expand All", "Settings", "Help", "Close" }; private String[] menuItem = { "Chats", "Contacts", "CGM Groups", "Pending","Request" }; private List<String> menuItemList = Arrays.asList(menuItem); private int commonGroupPosition = 0; private String etAlertVal; private DatabaseHelper dbHelper; private int categoryID, listPos; /** New Code here.. */ private ArrayList<String> groupNames; private ArrayList<ArrayList<ChildItems>> childs; private UserMenuAdapter adapter; private Object object; private String[] data2 = { "PIN Michelle", "IP Call" }; private ListView mlist2; private ImageButton mimBtnMenu; private LinearLayout mllpopmenu; private View popupView; private PopupWindow popupWindow; private AlertDialog.Builder alert; private EditText input; private TextView mtvUserName, mtvUserTagLine; private ExpandableListView mExpandableListView; public static List<CategoryDataClass> categoryList; private boolean menuType = false; private String childValContact=""; public static Context context; @Override public void onBackPressed() { if (mllpopmenu.getVisibility() == View.VISIBLE) { mllpopmenu.setVisibility(View.INVISIBLE); } else { if (CCMStaticVariable.CommonConnection.isConnected()) { CCMStaticVariable.CommonConnection.disconnect(); } super.onBackPressed(); } } @SuppressWarnings("unchecked") @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_MENU) { if (mllpopmenu.getVisibility() == View.VISIBLE) { mllpopmenu.setVisibility(View.INVISIBLE); } else { if (commonGroupPosition >= 4 && menuType == true) { if(childValContact == ""){ mllpopmenu.setVisibility(View.VISIBLE); mlist2.setAdapter(new ArrayAdapter(UserMenuActivity.this, R.layout.listviewtext, R.id.tvMenuText, data_Contact)); }else{ mllpopmenu.setVisibility(View.VISIBLE); mlist2.setAdapter(new ArrayAdapter(UserMenuActivity.this, R.layout.listviewtext, R.id.tvMenuText, data_child_contact)); } } else if (commonGroupPosition == 0) { mllpopmenu.setVisibility(View.VISIBLE); mlist2.setAdapter(new ArrayAdapter(UserMenuActivity.this, R.layout.listviewtext, R.id.tvMenuText, data)); } } return true; } return super.onKeyDown(keyCode, event); } @Override public void onCreate(Bundle icicle) { super.onCreate(icicle); setContentView(R.layout.usermenulayout); dbHelper = new DatabaseHelper(UserMenuActivity.this); //this.context = context.getApplicationContext(); XMPPConn.getContactList(); connection = CCMStaticVariable.CommonConnection; Presence userPresence = new Presence(Presence.Type.available); userPresence.setPriority(24); userPresence.setMode(Presence.Mode.away); connection.sendPacket(userPresence); } @Override protected void onResume() { super.onResume(); Presence userPresence = new Presence(Presence.Type.available); userPresence.setPriority(24); userPresence.setMode(Presence.Mode.away); connection.sendPacket(userPresence); XMPPConn.getContactList(); setExpandableListView(); } public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) { if (groupPosition == 1 && childPosition == 0) { startActivity(new Intent(UserMenuActivity.this, InvitetoCCMActivity.class)); } else if (groupPosition == 1 && childPosition != 0) { Intent intent = new Intent(UserMenuActivity.this, UserChatActivity.class); intent.putExtra("userNameVal", XMPPConn.mfriendList.get(childPosition - 1).friendName); startActivity(intent); } else if (groupPosition == 2 && childPosition == 0) { startActivity(new Intent(UserMenuActivity.this, CreateGroupActivity.class)); } else if (groupPosition == 2 && childPosition != 0) { String GROUP_NAME = childs.get(groupPosition).get(childPosition) .getName().toString(); int end = GROUP_NAME.indexOf("("); CCMStaticVariable.groupName = GROUP_NAME.substring(0, end).trim(); startActivity(new Intent(UserMenuActivity.this, GroupsActivity.class)); } else if (groupPosition >= 4) { childValContact = childs.get(groupPosition).get(childPosition).getName().trim(); showToast("user==>"+childValContact, 0); } return false; } private void setExpandableListView() { /***###############GROUP ARRAY ############################*/ final ArrayList<String> groupNames = new ArrayList<String>(); groupNames.add("Chats (2)"); groupNames.add("Contacts (" + XMPPConn.mfriendList.size() + ")"); groupNames.add("CGM Groups (" + XMPPConn.mGroupList.size() + ")"); groupNames.add("Pending (1)"); XMPPConn.getGroup(); categoryList = dbHelper.getAllCategory(); /**Group From Sever*/ if (XMPPConn.mGroupList.size() > 0) { for (int g = 0; g < XMPPConn.mGroupList.size(); g++) { XMPPConn.getGroupContact(XMPPConn.mGroupList.get(g).groupName); groupNames.add(XMPPConn.mGroupList.get(g).groupName + "(" + XMPPConn.mGroupContactList.size()+ ")"); } } if(categoryList.size() > 0){ for (int cat = 0; cat < categoryList.size(); cat++) { groupNames.add(categoryList.get(cat).getCategoryName()+ "(0)"); } } this.groupNames = groupNames; /*** ###########CHILD ARRAY * #################*/ ArrayList<ArrayList<ChildItems>> childs = new ArrayList<ArrayList<ChildItems>>(); ArrayList<ChildItems> child = new ArrayList<ChildItems>(); child.add(new ChildItems("Alisha", "Hi",0)); child.add(new ChildItems("Michelle", "Good Morning",0)); childs.add(child); child = new ArrayList<ChildItems>(); child.add(new ChildItems("", "",0)); if (XMPPConn.mfriendList.size() > 0) { for (int n = 0; n < XMPPConn.mfriendList.size(); n++) { child.add(new ChildItems(XMPPConn.mfriendList.get(n).friendNickName, XMPPConn.mfriendList.get(n).friendStatus, XMPPConn.mfriendList.get(n).friendState)); } } childs.add(child); /************** CGM Group Child here *********************/ child = new ArrayList<ChildItems>(); child.add(new ChildItems("", "",0)); if (XMPPConn.mGroupList.size() > 0) { for (int grop = 0; grop < XMPPConn.mGroupList.size(); grop++) { child.add(new ChildItems( XMPPConn.mGroupList.get(grop).groupName + " (" + XMPPConn.mGroupList.get(grop).groupUserCount + ")", "",0)); } } childs.add(child); child = new ArrayList<ChildItems>(); child.add(new ChildItems("Shuchi", "Pending (Waiting for Authorization)",0)); childs.add(child); /************************ Group Contact List *************************/ if (XMPPConn.mGroupList.size() > 0) { for (int g = 0; g < XMPPConn.mGroupList.size(); g++) { /** Contact List */ XMPPConn.getGroupContact(XMPPConn.mGroupList.get(g).groupName); child = new ArrayList<ChildItems>(); for (int con = 0; con < XMPPConn.mGroupContactList.size(); con++) { child.add(new ChildItems( XMPPConn.mGroupContactList.get(con).friendName, XMPPConn.mGroupContactList.get(con).friendStatus,0)); } childs.add(child); } } if(categoryList.size() > 0){ for (int cat = 0; cat < categoryList.size(); cat++) { child = new ArrayList<ChildItems>(); child.add(new ChildItems("-none-", "",0)); childs.add(child); } } this.childs = childs; /** Set Adapter here */ adapter = new UserMenuAdapter(this, groupNames, childs); setListAdapter(adapter); object = this; mlist2 = (ListView) findViewById(R.id.list2); mimBtnMenu = (ImageButton) findViewById(R.id.imBtnMenu); mllpopmenu = (LinearLayout) findViewById(R.id.llpopmenu); mtvUserName = (TextView) findViewById(R.id.tvUserName); mtvUserTagLine = (TextView) findViewById(R.id.tvUserTagLine); //Set User name.. System.out.println("CCMStaticVariable.loginUserName===" + CCMStaticVariable.loginUserName); if (!CCMStaticVariable.loginUserName.equalsIgnoreCase("")) { mtvUserName.setText("" + CCMStaticVariable.loginUserName); } /** Expandable List set here.. */ mExpandableListView = (ExpandableListView) this .findViewById(android.R.id.list); mExpandableListView.setOnGroupClickListener(new OnGroupClickListener() { @Override public boolean onGroupClick(ExpandableListView parent, View v, int groupPosition, long id) { XMPPConn.getContactList(); if (parent.isGroupExpanded(groupPosition)) { commonGroupPosition = 0; }else{ commonGroupPosition = groupPosition; } String GROUP_NAME = groupNames.get(groupPosition); int end = groupNames.get(groupPosition).indexOf("("); String GROUP_NAME_VALUE = GROUP_NAME.substring(0, end).trim(); if (menuItemList.contains(GROUP_NAME_VALUE)) { menuType = false; CCMStaticVariable.groupCatName = GROUP_NAME_VALUE; } else { menuType = true; CCMStaticVariable.groupCatName = GROUP_NAME_VALUE; } long findCatId = dbHelper.getCategoryID(GROUP_NAME_VALUE); if (findCatId != 0) { categoryID = (int) findCatId; } childValContact=""; showToast("Clicked on==" + GROUP_NAME_VALUE, 0); return false; } }); /** Click on item */ mlist2.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int pos,long arg3) { if (commonGroupPosition >= 4) { if(childValContact == ""){ if (pos == 0) { showAlertEdit(CCMStaticVariable.groupCatName); } /** Move contact to catgory */ if (pos == 1) { startActivity(new Intent(UserMenuActivity.this,AddContactCategoryActivity.class)); } }else{ if(pos == 0){ Intent intent = new Intent(UserMenuActivity.this,UserChatActivity.class); intent.putExtra("userNameVal",childValContact); startActivity(intent); } if(pos == 1){ XMPPConn.removeEntry(childValContact); showToast("Contact deleted sucessfully", 0); Intent intent = new Intent(UserMenuActivity.this,UserMenuActivity.class); } } } else { /** MyProfile */ if (pos == 0) { startActivity(new Intent(UserMenuActivity.this, MyProfileActivity.class)); } /** New multiperson chat start */ if (pos == 1) { startActivity(new Intent(UserMenuActivity.this, NewMultipersonChatActivity.class)); } /** New Broadcast message */ if (pos == 2) { startActivity(new Intent(UserMenuActivity.this, NewBroadcastMessageActivity.class)); } /** Click on add category */ if (pos == 3) { showAlertAdd(); } if (pos == 4) { startActivity(new Intent(UserMenuActivity.this, CreateGroupActivity.class)); } if (pos == 5) { startActivity(new Intent(UserMenuActivity.this, InvitetoCCMActivity.class)); } if (pos == 6) { startActivity(new Intent(UserMenuActivity.this, SearchActivity.class)); } if (pos == 7) { onGroupExpand(2); for (int i = 0; i < groupNames.size(); i++) { mExpandableListView.expandGroup(i); } } /** Click on settings */ if (pos == 8) { startActivity(new Intent(UserMenuActivity.this, SettingsActivity.class)); } if (pos == 10) { System.exit(0); } if (pos == 14) { if (mllpopmenu.getVisibility() == View.VISIBLE) { mllpopmenu.setVisibility(View.INVISIBLE); if (popupWindow.isShowing()) { popupWindow.dismiss(); } } else { mllpopmenu.setVisibility(View.VISIBLE); mlist2.setAdapter(new ArrayAdapter( UserMenuActivity.this, R.layout.listviewtext, R.id.tvMenuText, data)); } } } } }); } /** Toast message display here.. */ private void showToast(String msg, int time) { Toast.makeText(this, msg, time).show(); } public String showSubscriptionStatus(String friend){ return friend; } } Service.class public class UpdaterService extends Service { private XMPPConnection connection; String Friend; String user = ""; @Override public IBinder onBind(Intent arg0) { // TODO Auto-generated method stub return null; } @Override public void onCreate() { // Toast.makeText(this, "My Service Created", Toast.LENGTH_LONG).show(); super.onCreate(); } @Override public void onDestroy() { // TODO Auto-generated method stub super.onDestroy(); } @Override public void onStart(Intent intent, int startId) { // TODO Auto-generated method stub showToast("My Service Started", 0); connection = getConnection(); if (connection.isConnected()) { final Roster roster = connection.getRoster(); RosterListener r1 = new RosterListener() { @Override public void presenceChanged(Presence presence) { // TODO Auto-generated method stub XMPPConn.getContactList(); } @Override public void entriesUpdated(Collection<String> arg0) { // TODO Auto-generated method stub //notification("entriesUpdated"); } @Override public void entriesDeleted(Collection<String> arg0) { // TODO Auto-generated method stub //notification("entriesDeleted"); } @Override public void entriesAdded(Collection<String> arg0) { // TODO Auto-generated method stub Iterator<String> it = arg0.iterator(); if (it.hasNext()) { user = it.next(); } RosterEntry entry = roster.getEntry(user); if(entry.getType().toString().equalsIgnoreCase("to")){ int index_of_Alpha = Friend.indexOf("@"); String subID = Friend.substring(0, index_of_Alpha); notification("Hi "+subID+" wants to add you"); } } }; if (roster != null) { roster.setSubscriptionMode(Roster.SubscriptionMode.manual); System.out.println("subscription going on"); roster.addRosterListener(r1); } } else { showToast("Connection lost-", 0); } } protected void showToast(String msg, int time) { Toast.makeText(this, msg, time).show(); } private XMPPConnection getConnection() { return CCMStaticVariable.CommonConnection; } /** Notification manager */ private void notification(CharSequence message) { String ns = Context.NOTIFICATION_SERVICE; NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns); int icon = R.drawable.ic_launcher; CharSequence tickerText = message; long when = System.currentTimeMillis(); Notification notification = new Notification(icon, tickerText, when); Context context = getApplicationContext(); CharSequence contentTitle = "CCM"; CharSequence contentText = message; Intent notificationIntent = new Intent(this, ManageNotification.class); notificationIntent.putExtra("Subscriber_ID",user ); PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0); notification.setLatestEventInfo(context, contentTitle, contentText, contentIntent); notification.flags |= Notification.FLAG_AUTO_CANCEL; final int HELLO_ID = 1; mNotificationManager.notify(HELLO_ID, notification); } } Here is my adapter class public class UserMenuAdapter extends BaseExpandableListAdapter { private ArrayList<String> groups; private ArrayList<ArrayList<ChildItems>> childs; private Context context; public LayoutInflater inflater; ImageView img_availabiliy; private static final int[] EMPTY_STATE_SET = {}; private static final int[] GROUP_EXPANDED_STATE_SET = {android.R.attr.state_expanded}; private static final int[][] GROUP_STATE_SETS = { EMPTY_STATE_SET, // 0 GROUP_EXPANDED_STATE_SET // 1 }; public UserMenuAdapter(Context context, ArrayList<String> groups, ArrayList<ArrayList<ChildItems>> childs) { this.context = context; this.groups = groups; this.childs = childs; inflater = LayoutInflater.from(context); } @Override public Object getChild(int groupPosition, int childPosition) { return childs.get(groupPosition).get(childPosition); } @Override public long getChildId(int groupPosition, int childPosition) { return (long) (groupPosition * 1024 + childPosition); } @Override public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { View v = null; if (convertView != null) v = convertView; else v = inflater.inflate(R.layout.child_layout, parent, false); ChildItems ci = (ChildItems) getChild(groupPosition, childPosition); TextView tv = (TextView) v.findViewById(R.id.tvChild); tv.setText(ci.getName()); TextView tv2 = (TextView) v.findViewById(R.id.tvChild2); tv2.setText(ci.getDailyStatus()); img_availabiliy = (ImageView)v.findViewById(R.id.img_childlayout_AVAILABILITY); ImageView friendPics = (ImageView)v.findViewById(R.id.ivFriendPics); if(ci.getStatusState() == 1){ img_availabiliy.setImageResource(R.drawable.online); } else if(ci.getStatusState()==0){ img_availabiliy.setImageResource(R.drawable.offline); } else if (ci.getStatusState()==2) { img_availabiliy.setImageResource(R.drawable.away); } else if(ci.getStatusState()==3){ img_availabiliy.setImageResource(R.drawable.busy); } else{ img_availabiliy.setImageDrawable(null); } if((groupPosition == 1 && childPosition == 0)){ friendPics.setImageResource(R.drawable.inviteto_ccm); img_availabiliy.setVisibility(View.INVISIBLE); } else if(groupPosition == 2 && childPosition == 0){ friendPics.setImageResource(R.drawable.new_ccmgroup); img_availabiliy.setVisibility(View.VISIBLE); }else{ if(ci.getPicture()!= null){ Bitmap bitmap = BitmapFactory.decodeByteArray(ci.getPicture(), 0, ci.getPicture().length); bitmap = Bitmap.createScaledBitmap(bitmap, 50, 50, true); friendPics.setImageBitmap(bitmap); }else{ friendPics.setImageResource(R.drawable.avatar); } img_availabiliy.setVisibility(View.VISIBLE); } return v; } @Override public int getChildrenCount(int groupPosition) { return childs.get(groupPosition).size(); } @Override public Object getGroup(int groupPosition) { return groups.get(groupPosition); } @Override public int getGroupCount() { return groups.size(); } @Override public long getGroupId(int groupPosition) { return (long) (groupPosition * 1024); } @Override public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) { View v = null; if (convertView != null) v = convertView; else v = inflater.inflate(R.layout.group_layout, parent, false); String gt = (String) getGroup(groupPosition); TextView tv2 = (TextView) v.findViewById(R.id.tvGroup); if (gt != null) tv2.setText(gt); /**Set Image on group layout, Max/min*/ View ind = v.findViewById( R.id.explist_indicator); View groupInd = v.findViewById( R.id.llgroup); if( ind != null ) { ImageView indicator = (ImageView)ind; if( getChildrenCount( groupPosition ) == 0 ) { indicator.setVisibility( View.INVISIBLE ); } else { indicator.setVisibility( View.VISIBLE ); int stateSetIndex = ( isExpanded ? 1 : 0) ; Drawable drawable = indicator.getDrawable(); drawable.setState(GROUP_STATE_SETS[stateSetIndex]); } } if( groupInd != null ) { RelativeLayout indicator2 = (RelativeLayout)groupInd; if( getChildrenCount( groupPosition ) == 0 ) { indicator2.setVisibility( View.INVISIBLE ); } else { indicator2.setVisibility( View.VISIBLE ); int stateSetIndex = ( isExpanded ? 1 : 0) ; Drawable drawable2 = indicator2.getBackground(); drawable2.setState(GROUP_STATE_SETS[stateSetIndex]); } } return v; } @Override public boolean hasStableIds() { return true; } @Override public boolean isChildSelectable(int groupPosition, int childPosition) { return true; } public void onGroupCollapsed(int groupPosition) { } public void onGroupExpanded(int groupPosition) { } } I just want to update my list in ON PRESENCE CHANGED method in the Service class.. Please suggest me a means to do the same.

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  • VB.NET custom user control graphics rotation

    - by AtharvaI
    Hi, this is my first question on here. I'm trying to build a dial control as a custom user control in VB.NET. I'm using VS2008. so far I have managed to rotate image using graphics.rotatetransform . however, this rotate everything. Now I have a Bitmap for the dial which should stay stable and another Bitmap for the needle which I need to rotate. so far i've tried this: Dim gL As Graphics = Graphics.FromImage(bmpLongNeedle) gL.TranslateTransform(bmpLongNeedle.Width / 2, bmpLongNeedle.Height * 0.74) gL.RotateTransform(angleLongNeedle) gL.TranslateTransform(-bmpLongNeedle.Width / 2, -bmpLongNeedle.Height * 0.74) gL.DrawImage(bmpLongNeedle, 0, 0) As I understand it, the image of the needle should be rotated at angle "angleLongNeedle" although i'm placing the rotated image at 0,0. However, the result is that the Needle doesn't get drawn on the control. any pointers as to where I might be going wrong or something else I should be doing? Thanks in advance

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  • VB.NET Window Screen Capture (ALT+PRINTSCREEN)

    - by Steve Thomas
    Hi, I found that code somewhere and I find it quite useful but I would like to find a way to make it work so it capture only the given window target. Maybe with a processID or Window Name. Even if that window is not active. I do not want to make that window active but want to get a screen capture like if I was doing Alt+PrintScreen on it. Here is the code that works for full Screen Capture Private bmpScreenShot As Bitmap Private gfxScreenshot As Graphics bmpScreenShot = New Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height, PixelFormat.Format32bppArgb) gfxScreenshot = Graphics.FromImage(bmpScreenShot) gfxScreenshot.CopyFromScreen(Screen.PrimaryScreen.Bounds.X, Screen.PrimaryScreen.Bounds.Y, 0, 0, Screen.PrimaryScreen.Bounds.Size, CopyPixelOperation.SourceCopy) bmpScreenShot.Save(fileName, ImageFormat.Png) I use the Visual Basic 2008 Express Thank you in advance!

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  • how to generate large image in compact framework

    - by Buthrakaur
    I need to generate large images (A4 image at 200 DPI, PNG format would be fine) in my compact framework application. This is impossible to do in standard way due to memory limitations (such big image will throw OOMException). Is there any library which offers file-backed stream image generation? Or I could generate many smaller stripes of images (each stripe representing a row of the large image) using standard Bitmap approach, but I need to merge them together afterwards - is there any method how to merge many smaller images into one large without having to instantiate large Bitmap instance (which would again cause OOM)?

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  • Android image scaling to support multiple resolutions

    - by tyuo9980
    I've coded my game for 320x480 and I figure that the easiest way to support multiple resolutions is to scale the end image. What are your thoughts on this? Would it be cpu efficient to do it this way? I have all my images placed in the mdpi folder, I'll have it drawn unscaled on the screen onto a buffer, then scale it to fit the screen. all the user inputs will be scaled as well. I have these 2 questions: -How do you draw a bitmap without android automatically scaling it -How do you scale a bitmap?

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  • DrawImage in XP Mode or Remote Desktop

    - by simplecoder
    I'm displaying a PNG with a transparent background that looks good in Windows 7, but then I run my app in XP Mode or remote desktop to a Windows XP machine and the PNG looks incorrect. I noticed that if I disable "Integration Mode" or run the app on XP without remote desktop, the image looks fine. How do I get DrawImage to render the PNG correctly in XP Mode or remote desktop? Image inside Windows 7 Image inside XP Mode or remote desktop Here's my code: protected override void OnPaint(PaintEventArgs e) { Image image = Image.FromFile("hello.png", false); Bitmap bmp = new Bitmap(image); Rectangle destRect = new Rectangle(0, 0, image.Width, image.Height); e.Graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel); base.OnPaint(e); }

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  • How i store the images pixels in matrix form?

    - by Rajendra Bhole
    Hi, I developing an application in which the pixelize image i want to be store in matrix format. The code is as follows. struct pixel { //unsigned char r, g, b,a; Byte r, g, b; int count; }; (NSInteger) processImage1: (UIImage*) image { // Allocate a buffer big enough to hold all the pixels struct pixel* pixels = (struct pixel*) calloc(1, image.size.width * image.size.height * sizeof(struct pixel)); if (pixels != nil) { // Create a new bitmap CGContextRef context = CGBitmapContextCreate( (void*) pixels, image.size.width, image.size.height, 8, image.size.width * 4, CGImageGetColorSpace(image.CGImage), kCGImageAlphaPremultipliedLast ); NSLog(@"1=%d, 2=%d, 3=%d", CGImageGetBitsPerComponent(image), CGImageGetBitsPerPixel(image),CGImageGetBytesPerRow(image)); if (context != NULL) { // Draw the image in the bitmap CGContextDrawImage(context, CGRectMake(0.0f, 0.0f, image.size.width, image.size.height), image.CGImage); NSUInteger numberOfPixels = image.size.width * image.size.height; I confusing about how to initialize the 2-D matrix in which the matrix store data of pixels.

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  • C# GDI - How to check if a Pixel is opaque or not?

    - by rkawano
    I am using a method to get a pixel of the image to check if this point is transparent or not. I am using GetPixel that returns a System.Drawing.Color with a 32bit color info. This struct have the "A" property where I can get the alpha value of pixel, according to this MSDN topic. Code: using (Bitmap bmp = new Bitmap(path)) { Color pixel = bmp.GetPixel(0, 0); if (pixel.A == 0) // This is a fully transparent pixel else // This is not a fully transparent pixel } When I use this method with a fully transparent PNG images it returns 0. When I run with a white semi-transparent images, it will give me other values starting on 1 and up to 86, where 86 are given for images with a 100% alfa (full opaque). But with opaque JPEG images, the "A" property are giving me all sort of values like 56, 71, 86, 129, and others, depending on image. But these pixels are fully opaques! How are the correct way to check if a pixel is opaque or not?

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  • AS3IsoLib New IsoSprite

    - by KoopaTroopa
    I'm following a guide (http://www.jsparrowhawk.com/blog/?p=75) on how to use the As3IsoLib library. It seems his examples are a little erroneous at times. I'm at the part of creating a sprite, assigning it an image and then rendering. When I test my application I get my box and grid but not the sprite. var mySprite:IsoSprite; mySprite = new IsoSprite(); mySprite.setSize(40, 40, 0); mySprite.moveTo(120, 40, 0); scene.addChild(mySprite); var myImgLoader:Loader = new Loader(); var myImgURL:URLRequest = new URLRequest("http://www.jsparrowhawk.com/blog/wp-content/uploads/2011/10/as3isolib_styling_6b.jpg"); myImgLoader.load(myImgURL); myImgLoader.contentLoaderInfo.addEventListener(Event.COMPLETE, imgLoadComplete); function imgLoadComplete(e:Event):void { var myImg:Bitmap = new Bitmap(e.target.content.bitmapData); mySprite.sprites = [myImg]; scene.render(); }

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  • Upload picture directly to the server

    - by Rajeev
    In the following link http://www.tuttoaster.com/create-a-camera-application-in-flash-using-actionscript-3/ how to make the picture upload directly to the server after taking a picture from webcam package { import flash.display.Sprite; import flash.media.Camera; import flash.media.Video; import flash.display.BitmapData; import flash.display.Bitmap; import flash.events.MouseEvent; import flash.net.FileReference; import flash.utils.ByteArray; import com.adobe.images.JPGEncoder; public class caml extends Sprite { private var camera:Camera = Camera.getCamera(); private var video:Video = new Video(); private var bmd:BitmapData = new BitmapData(320,240); private var bmp:Bitmap; private var fileReference:FileReference = new FileReference(); private var byteArray:ByteArray; private var jpg:JPGEncoder = new JPGEncoder(); public function caml() { saveButton.visible = false; discardButton.visible = false; saveButton.addEventListener(MouseEvent.MOUSE_UP, saveImage); discardButton.addEventListener(MouseEvent.MOUSE_UP, discard); capture.addEventListener(MouseEvent.MOUSE_UP, captureImage); if (camera != null) { video.smoothing = true; video.attachCamera(camera); video.x = 140; video.y = 40; addChild(video); } else { trace("No Camera Detected"); } } private function captureImage(e:MouseEvent):void { bmd.draw(video); bmp = new Bitmap(bmd); bmp.x = 140; bmp.y = 40; addChild(bmp); capture.visible = false; saveButton.visible = true; discardButton.visible = true; } private function saveImage(e:MouseEvent):void { byteArray = jpg.encode(bmd); fileReference.save(byteArray, "Image.jpg"); removeChild(bmp); saveButton.visible = false; discardButton.visible = false; capture.visible = true; } private function discard(e:MouseEvent):void { removeChild(bmp); saveButton.visible = false; discardButton.visible = false; capture.visible = true; } } }

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  • BitmapFactory.decodeResource returns null value

    - by krasnoff
    I am tring to load bitmaps from an internal resource in a View object (the source itself is in "drawable" files). the code is: import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.graphics.Canvas; import android.util.AttributeSet; import android.view.View; public class BannerView extends View { private Bitmap m_Banner = null; public BannerView(Context context, AttributeSet attributeSet) { super(context, attributeSet); m_Banner = BitmapFactory.decodeResource(getResources(), R.drawable.banner); } } Why m_Banner value is null? thank you in advance Kobi

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  • Resizing gives me to heavy image

    - by phenevo
    Hi, I'm resizing jpeg 1200x900 ,556kb by method: public static Image ResizeImage(Image imgToResize, int height) //height=400 { int destWidth; int destHeight; int sourceWidth = imgToResize.Width; int sourceHeight = imgToResize.Height; float nPercent = 0; float nPercentH = 0; nPercentH = ((float)height / (float)sourceHeight); nPercent = nPercentH; destWidth = (int)(sourceWidth * nPercent); destHeight = height; Bitmap b = new Bitmap(destWidth, destHeight); Graphics g = Graphics.FromImage((Image)b); g.InterpolationMode = InterpolationMode.HighQualityBicubic; g.DrawImage(imgToResize, 0, 0, destWidth, destHeight); g.Dispose(); return b; } gives me 555kb 533x400 jpeg. Why this photo is so heavy. For photo jpeg 2111kb 2156x1571 I get 556kb 533x400 jpeg Why in first case is so terrible !

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  • problem getting a form image background

    - by Deumber
    I'm creating a datagridview transparent //I got the parent background image Bitmap parentBackGround = new Bitmap(this.Parent.BackgroundImage); //Set the area i want to create equal to the size of my grid Rectangle rect = new Rectangle(this.Location.X, this.Location.Y, this.Width, this.Height); //And draw in the entire grid the area of the background image that is cover with my grid, making a "transparent" effect. graphics.DrawImage(parentBackGround.Clone(rect, PixelFormat.Format32bppRgb), gridBounds); When the backgroundimage of the grid's parent is show in an normal layout all work ok, but if the layout is stretch, center or any other, the transparency effent gone, have you any idea to fix it?

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