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  • Dynamically add tab sheets to page control and embed a form?

    - by Jerry Dodge
    I'm working on a module which consists of a page control. By default, this page control (TPageControl) shouldn't have any tab sheets (TTabSheet), but upon initialization, it should dynamically insert these pages and embed a form inside of it. The issue comes with knowing how to insert a tab sheet into the page control. How do I create this? And once it's created, along with the forms inside each one, how do I iterate through them to destroy the forms?

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  • How do I make a rectangle move in an image?

    - by alicedimarco
    Basically I have an image loaded, and when I click a portion of the image, a rectangle (with no fill) shows up. If I click another part of the image again, that rectangle will show up once more. With each click, the same rectangle should appear. So far I have this code, now I don't know how to make the image appear. My image from my file directory. I have already made the code to get the image from my file directory. import java.awt.Color; import java.awt.Graphics; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import javax.swing.JFrame; import javax.swing.JOptionPane; import javax.swing.JPanel; public class MP2 extends JPanel implements MouseListener{ JFrame frame; JPanel panel; int x = 0; int y = 0; String input; public MP2(){ } public static void main(String[] args){ JFrame frame = new JFrame(); MP2 panel = new MP2(); panel.addMouseListener(panel); frame.add(panel); frame.setSize(200,200); frame.setVisible(true); } public void mouseClicked(MouseEvent event) { // TODO Auto-generated method stub this.x = event.getX(); this.y = event.getY(); this.repaint(); input = JOptionPane.showInputDialog("Something pops out"); System.out.println(input); } public void mouseEntered(MouseEvent arg0) { // TODO Auto-generated method stub } public void mouseExited(MouseEvent arg0) { // TODO Auto-generated method stub } public void mousePressed(MouseEvent arg0) { // TODO Auto-generated method stub } public void mouseReleased(MouseEvent arg0) { // TODO Auto-generated method stub } public void paintComponent(Graphics g){ super.paintComponent(g); // this.setBackground(Color.white); *Sets the bg color of the panel g.setColor(new Color(255,0,0)); g.drawRect(x, y, 100, 100); } }

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  • How can I validate input to the edit control of a cell in a DataGridView?

    - by Stuart Helwig
    It appears that the only way to capture the keypress events within a cell of a DataGridView control, in order to validate user input as they type, is to us the DataGridView controls OnEditControlShowing event, hook up a method to the edit control's (e.Control) keypress event and do some validation. My problem is that I've built a heap of custom DataGridView column classes, with their own custom cell types. These cells have their own custom edit controls (things like DateTimePickers, and Numeric or Currency textboxes.) I want to do some numeric validation for those cells that have Numeric of Currency Textboxes as their edit controls but not all the other cell types. How can I determine, within the DataGridView's "OnEditControlShowing" override, whether or not a particular edit control needs some numeric validation?

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  • How do i tint an image with HTML5 Canvas ?

    - by djdolber
    My question is, what is the best way to tint an image that is drawn using the drawImage method. The target useage for this is advanced 2d particle-effects (game development) where particles change colors over time etc. I am not asking how to tint the whole canvas, only the current image i am about to draw. I have concluded that the globalAlpha parameter affects the current image that is drawn. //works with drawImage() canvas2d.globalAlpha = 0.5; But how do i tint each image with an arbitrary color value ? It would be awesome if there was some kind of globalFillStyle or globalColor or that kind of thing...

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  • How can I get an image too big from a server?

    - by Daniel Calderon Mori
    I'm currenty developing for blackberry and just bumped into this problem as i was trying to download an image from a server. The servlet which the device communicates with is working correctly, as I have made a number of tests for it. But it gives me the 413 HTTP error ("Request entity too large"). I figure i will just get the bytes, uhm, portion by portion. How can i accomplish this? This is the code of the servlet (the doGet() method): try { ImageIcon imageIcon = new ImageIcon("c:\\Users\\dcalderon\\prueba.png"); Image image = imageIcon.getImage(); PngEncoder pngEncoder = new PngEncoder(image, true); output.write(pngEncoder.pngEncode()); } finally { output.close(); } Thanks. It's worth mentioning that I am developing both the client-side and the server-side.

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  • Is there any way to store full size image returned from camera activity in internal memory ?

    - by SimpleGuy
    I am using Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); intent.putExtra(MediaStore.EXTRA_OUTPUT,Uri.fromFile(externalFileObj)); intent to call default camera activity. To get full image you need to specify intent.putExtra(). But this always requires URI that works only for external storage files. I tried to create a temp.jpg image in internal memory and pass its URI Uri.fromFile(new File(getFilesDir() + "/temp.jpg")); but the camera activity won't return back after the image is captured. So there is no way to get Full size image from default camera application in our activity without using any external storage ? Assuming that the device do not have SD card or currently in use is there no way I can avoid using it ? Yes I know we can create our own camerapreview surface but I want to use the default camera application as it is natural with many more options. Thanks.

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  • Why does my SQL database not work in Android?

    - by user1426967
    In my app a click on an image button brings you to the gallery. After clicking on an image I want to call onActivityResult to store the image path. But it does not work. In my LogCat it always tells me that it crashes when it tries to save the image path. Can you find the problem? My onActivityResult method: mImageRowId = savedInstanceState != null ? savedInstanceState.getLong(ImageAdapter.KEY_ROWID) : null; @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if(requestCode == PICK_FROM_FILE && data != null && data.getData() != null) { Uri uri = data.getData(); if(uri != null) { Cursor cursor = getContentResolver().query(uri, new String[] { android.provider.MediaStore.Images.ImageColumns.DATA}, null, null, null); cursor.moveToFirst(); String image = cursor.getString(0); cursor.close(); if(image != null) { // HERE IS WHERE I WANT TO SAVE THE IMAGE. HERE MUST BE THE ERROR! if (mImageRowId == null) { long id = mImageHelper.createImage(image); if (id > 0) { mImageRowId = id; } } // Set the image and display it in the edit activity Bitmap bitmap = BitmapFactory.decodeFile(image); mImageButton.setImageBitmap(bitmap); } } } } This is my onSaveInstanceState method: private static final Long DEF_ROW_ID = 0L; @Override protected void onSaveInstanceState(Bundle outState) { outState.putLong(ImageAdapter.KEY_ROWID, mImageRowId != null ? mImageRowId : DEF_ROW_ID); super.onSaveInstanceState(outState); } This is a part from my DbAdapter: public long createImage(String image) { ContentValues cv = new ContentValues(); cv.put(KEY_IMAGE, image); return mImageDb.insert(DATABASE_TABLE, null, cv); }

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  • Better alternatives to know whether a control is valid in javascript?

    - by Anthony
    I want to know whether a control is valid or not in javascript. Is there a direct client side API available in Asp.Net which can tell me whether a control is valid or not? Eg. If I have 2 validators attached to a textbox, I need a function that can tell me whether the textbox is valid or not. If even 1 validator is not valid then it should return false. I can't seem to find a function that can give me this. Here is a little helper that I wrote which does the job but is inefficient: function isControlValid(control) { for (i = 0; i < Page_Validators.length; i++) { var validator = Page_Validators[i]; var controlId = validator.controltovalidate; if ($(control).attr('id') == controlId && validator.isvalid == false) { return false; } } return true; } Anybody has any better alternatives?

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  • How can we show the preview image of the video in table view cell ?

    - by srikanth rongali
    I have a table view and if we touch a cell a video plays. I need to show the preview image of the video in the UITableViewCell. I have kept some dummy image in the cell at image place and remaining space ion cell is with some labels and buttons. I need the image preview of the video with play symbol on it. How can I make this ? Should I use any photoshop type of things or any programable things. I do not know photoshop. Thank You.

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  • Can a JPEG compressed image be rotated without a loss in quality?

    - by Mat
    JPEG is a lossy compression scheme, so decompression-manipulation-recompression normally reduces the image quality further for each step. Is it possible to rotate a JPEG image without incurring further loss? From what little I know of the JPEG algorithm, it naively seems possible to avoid further loss with a bit of effort. Which common image manipulation programs (e.g. GIMP, Paint Shop Pro, Windows Photo Gallery) and graphic libraries cause quality loss when performing a rotation and which don't?

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  • How can I initialize an ActiveX control from a URL?

    - by Peter Ruderman
    I have an MFC ActiveX control embedded in a web page. Some of the parameters for this control are very large. I don't know what these values will be at compile time, but I do know that once retrieved, they will almost certainly never change. Currently, I embed the parameters like so: <object name="MyActiveX"> <param name="param" value="<%= GetData() %>" /> </object> I want to do something like this: <object name="MyActiveX"> <param name="param" value="content/data" valuetype="ref" /> </object> The idea is that the browser would retrieve the resource from the web server and pass it on to the control. The browser's own caching would then take care of the unneccesary downloads. Unfortunately, ref parameters don't work like this. The browser just passes the url along to the control (which strikes me as utterly useless, but I digress). So, is there some way I can make this work? Alternatively, is there an easy way in MFC to instruct the control's host container to retrieve a URI identified resource? Any better ideas?

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  • Is there a way to create my own "push pins" for a image without using Google Maps API?

    - by Charlie
    I am interested in working with friends via the internet on a fantasy world map. One of the things I want to do is host an image of the map online and allow us to insert push pins into the image that would then be associated with infoboxes. I don't want to resort to using the Google Map APIs mainly because this is something I want to just share among friends and not publicly. Terms of usage for the APIs state we would need to make the implementation available for everyone. This seems simple enough yet I've no idea how to do this. I looked into image maps, but that requires constant updates to the html markup itself. I just want to insert/delete/edit pushpins and infoboxes on the image and through our site itself. Can someone help me get started?

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  • How to make an custom button with an self-stretching image?

    - by mystify
    I slightly remember that there is an class which is capable of stretching an image in such a way, that the first x pixels and the last y pixels won't get stretched. For example if you have an button image with round corners, you would want those round corners to stay intact while the middle part of that image gets stretched.

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  • How to ignore viewstate of a previous request for particular control?

    - by AaronLS
    I am dynamically generating controls, and sometimes I want to create a control and have it ignore the viewstate. For example, sometimes the user has clicked a button indicating they want a different form loaded, so the control tree I generate on postback is different from the original control tree. This is fine, except when I call Controls.Add then it tries to load the viewstate form the old controls into the new controls if the control tree structure is similar, and I want them to instead ignore that viewstate(and also ignore the postback values for input controls as well). Can I do something like set the IDs of the controls or something that would allow me to conditionally prevent them from getting the viewstate/postback data of the previous request?

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  • How to work with delegates and event handler for user control.

    - by Shantanu Gupta
    I have created a user control that contains a button. I am using this control on my winform which will be loaded at run time after fetching data from database. Now I need to remove a row from a datatable on the Click event of that button. The problem is that how do I capture that event in my form. Currently it goes in that user control's btn click event defination.

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  • Suggestions on how to implement a UI Element to display a long image in iPhone.

    - by Tattat
    I want to display a long image on iPhone. The user can swipe left or right to see difficult parts of the image. I want to spite the long image into different parts... for example, a long long image is 1000* 100; I want to display 100*100 for each time. When the image is loaded, it shows from x:0 to x:100. When user swipe right, it becomes x:101, x:200. When the user swipe left, it back to x:0, x:100, when the user continue to swipe right, it show x:201, x:300. I am thinking how to implement this specified imageView. I have two ideas now. First, make my own imageView, which super class is UIImageView, and overriding the swipe left, swipe right method. Second, make my own UIView. just implement the user swipe left/right action. Which way you think is better, or any better ideas on implement this? thz u.

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  • With paperclip, how can I change the image location to a ":parent_model_id/:id" folder format?

    - by Jamis Charles
    Given that I have a Listing model that has many images and each image has one attachment, how can I have the listing_id be part of the folder structure? Like so: system/photos/[listing_id]/:id I know that using :id will output the id of the image record. Here's what I currently have: class Image < ActiveRecord::Base belongs_to :listing #Rails ActiveRecord Relation. An image belongs to a post. # paperclip data has_attached_file :photo, :styles => { :medium => "300x300>", :thumb => "100x100>" }, :url => "/public/system/:class/:attachment/:id/:style_:filename" end

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  • Does specifying image size in CSS allow the browser to do layout before download is complete?

    - by eaolson
    I've always tried to specify the height and width attributes for img tags in HTML. Not for style reasons, but because the browser then expects the size of the image and can do page layout even before the image has finished downloading. From the HTML spec: The height and width attributes give user agents an idea of the size of an image or object so that they may reserve space for it and continue rendering the document while waiting for the image data. I don't know why this has never occurred to me, but does specifying height and width in CSS, rather than inside the img tag, do the same thing?

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