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  • Organizing code, logical layout of segmented files

    - by David H
    I have known enough about programming to get me in trouble for about 10 years now. I have no formal education, though I've read many books on the subject for various languages. The language I am primarily focused on now would be php, atleast for the scale of things I am doing now. I have used some OOP classes for a while, but never took the dive into understanding principals behind the scenes. I am still not at the level I would like to be expression-wise...however my recent reading into a book titled The OOP Thought Process has me wanting to advance my programming skills. With motivation from the new concepts, I have started with a new project that I've coded some re-usable classes that deal with user auth, user profiles, database interfacing, and some other stuff I use regularly on most projects. Now having split my typical garbled spaghetti bowl mess of code into somewhat organized files, I've come into some problems when it comes to making sure files are all included when they need to be, and how to logically divide the scripts up into classes, aswell as how segmented I should be making each class. I guess I have rambled on enough about much of nothing, but what I am really asking for is advise from people, or suggested reading that focuses not on specific functions and formats of code, but the logical layout of projects that are larger than just a hobby project. I want to learn how to do things proper, and while I am still learning in some areas, this is something that I have no clue about other than just being creative, and trial/error. Mostly error. Thanks for any replies. This place is great.

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  • JButton Layout Issue

    - by Tom Johnson
    I'm putting together the basic layout for a contacts book, and I want to know how I can make the 3 test buttons span from edge to edge just as the arrow buttons do. private static class ButtonHandler implements ActionListener { public void actionPerformed(ActionEvent e) { System.out.println("Code Placeholder"); } } public static void main(String[] args) { //down button ImageIcon downArrow = new ImageIcon("down.png"); JButton downButton = new JButton(downArrow); ButtonHandler downListener = new ButtonHandler(); downButton.addActionListener(downListener); //up button ImageIcon upArrow = new ImageIcon("up.png"); JButton upButton = new JButton(upArrow); ButtonHandler upListener = new ButtonHandler(); upButton.addActionListener(upListener); //contacts JButton test1Button = new JButton("Code Placeholder"); JButton test2Button = new JButton("Code Placeholder"); JButton test3Button = new JButton("Code Placeholder"); Box box = Box.createVerticalBox(); box.add(test1Button); box.add(test2Button); box.add(test3Button); JPanel content = new JPanel(); content.setLayout(new BorderLayout()); content.add(box, BorderLayout.CENTER); content.add(downButton, BorderLayout.SOUTH); content.add(upButton, BorderLayout.NORTH); JFrame window = new JFrame("Contacts"); window.setContentPane(content); window.setSize(400, 600); window.setLocation(100, 100); window.setVisible(true); }

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  • Problem in print layout near page end

    - by Miraaj
    Hi all, I am facing some problem in print layout, below is the description of steps I followed and problem which I am facing: I have taken a custom view over which there are NSTextViews, NSTableViews arranged one below other. I am trying to calculate exact height of NSTextViews and NSTableViews depending upon content in them. Depending upon calculated height I am arranging them in super-custom view. Then I am printing the view, using this code : [self arrangeBriefLayoutDynamically]; // step 2nd and 3rd // setting fixed parameters for printing NSPrintInfo * printInfo = [NSPrintInfo sharedPrintInfo]; [printInfo setVerticallyCentered:NO]; [printInfo setRightMargin:12.0]; [printInfo setTopMargin:37.0]; [printInfo setLeftMargin:12.0]; [printInfo setHorizontallyCentered:YES]; [printInfo setHorizontalPagination:NSFitPagination]; [printInfo setVerticalPagination:NSAutoPagination]; [printInfo setPaperName:@"na-letter"]; [printInfo setOrientation:NSPortraitOrientation]; PMSetScale([printInfo PMPageFormat], 100.0); [NSPrintInfo setSharedPrintInfo:printInfo]; [briefCompleteView print:nil]; Problem is : when size of a table view or text view exceeds, such that it crosses the page boundary then SOMETIMES text near boundary appears improper i.e.. part of its height lies on first page and rest of it lies on second page. Click to check problem ! Can anyone suggest me some way to resolve it ? Thanks, Miraaj

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  • Using git-svn with slightly strange svn layout

    - by Ibrahim
    Hi guys, I'm doing an internship and they are using SVN (although there has been some discussion of moving to hg or git but that's not in the immediate future). I like git so I would like to use git-svn to interact with the svn repository and be able to do local commits and branches and stuff like that (rebasing before committing to svn of course). However, there is one slight wrinkle, the svn repository layout is a little weird. It basically looks like this /FOO +-branches +-tags +-trunk +-FOO +-myproject Basically, my project has been stuck into a subdirectory of trunk, and there is another project that is also a subdirectory of the trunk. If I use git-svn and only clone the directory for my project instead of the root, will it get confused or cause any problems? I just wonder because the commit numbers are incremented for the entire repository and not just my project, so would commits be off or anything like that? I probably wouldn't push any branches or tags to SVN because I'd prefer to just do those locally in git and I don't know how git-svn deals with branches and tags anyway, and no one else uses them so I find little point in doing so. Thanks for the help!

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  • How to draw some lines in a view element defined in the xml layout

    - by Nils
    Hello, I have problems drawing some simple lines in a view object (Android programming). First I created the layout with the view element(kind of painting area) in it (XML file). [...] < View android:id="@+id/viewmap" android:layout_width="572px" android:layout_height="359px" android:layout_x="26px" android:layout_y="27px" [...] ... and tried then to access it to draw some lines. Unfortunately the program is running and other UI elements like buttons are displayed, but I can't see the drawings. What's wrong ? [...] viewmap = (View) findViewById(R.id.viewmap); Canvas canvas = new Canvas(); viewmap.draw(canvas); Paint p = new Paint(); p.setColor(Color.BLUE); p.setStyle(Paint.Style.STROKE); canvas.drawColor(Color.WHITE); p.setColor(Color.BLUE); canvas.drawLine(4, 4, 29, 5, p); p.setColor(Color.RED); viewmap.draw(canvas); [...] Thanks for help :) !

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  • Android Video Layout and backbutton to activity

    - by Marcjc
    I have an application where you can click on a button, this takes you to a new activity with four new buttons, listen, bio, ringtone, and watch. My watch button kicks off the following code: Button cmd_watchme = (Button)this.findViewById(R.id.watch); cmd_watchme.setOnClickListener(new View.OnClickListener() { public void onClick(View view) { setContentView(R.layout.tvvideo); VideoView video=(VideoView)findViewById(R.id.VideoView); MediaController mediaController = new MediaController(andy.this); mediaController.setAnchorView(video); video.setMediaController(mediaController); video.setVideoURI(videopath); video.start(); } }); After the video is displayed I am trying to get the backbutton on the phone itself to take the user back to the four button selection activity, listen, bio, ringtone, and watch. Question is, how do i do this? I was figuring if there was a way to change the ContentView after the video is displayed back to the main one for the four button page but could not figure it out. When I press the backbutton on the device, it takes me two levels up to the main selection activity not the four button activity. I hope this was somewhat clear. Thanks for any help.

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  • Page content layout issues

    - by Prupel
    I'm designing a theme for a blog and I'm having some trouble trying to get a layout working. Here's an image of what I want. This diagram represents the individual posts and not the website itself, so it will be contained in a box of it's own, lets call it .container. Also the purple and green are in another box, let's call it .content. The other elements will be called by their color for now. so here's more or less what the CSS looks like: .container { display:block; margin:0 25px; } .gray, .blue, .content { display:block; width:100%; } .purple { display:inline-block; width:125px; height:100%; text-align:center; } .green { display:inline-block; } That's all there is at the moment. I tried float but that made no effect. What's happening is something like this. Here's a few more things you should know: .container's width is NOT set it is auto .purple and .green don't necessarily need to be the same size as long as .green doesn't go to that side. .purple CAN have a set height .green is where the meat is, that's where the actual post goes, keep that in mind. I don't think tables will help, the problem is inside .content.

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  • Database layout for an application with geocoding features using geokit

    - by vooD
    I'm developing a real estate web catalogue and want to geocode every ad using geokit gem. My question is what would be the best database layout from the performance point if i want to make search by country, city of the selected country, administrative area or nearest metro station of the selected city. Available countries, cities, administrative areas and metro sations should be defined by the administrator of catalogue and must be validated by geocoding. I came up with single table: create_table "geo_locations", :force => true do |t| t.integer "geo_location_id" #parent geo location (ex. country is parent geo location of city t.string "country", :null => false #necessary for any geo location t.string "city", #not null for city geo location and it's children t.string "administrative_area" #not null for administrative_area geo location and it's children t.string "thoroughfare_name" #not null for metro station or street name geo location and it's children t.string "premise_number" #house number t.float "lng", :null => false t.float "lat", :null => false t.float "bound_sw_lat", :null => false t.float "bound_sw_lng", :null => false t.float "bound_ne_lat", :null => false t.float "bound_ne_lng", :null => false t.integer "mappable_id" t.string "mappable_type" t.string "type" #country, city, administrative area, metro station or address end Final geo location is address it contains all neccessary information to put marker of the real estate ad on the map. But i'm still stuck on search functionality. Any help would be highly appreciated.

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  • Need help with height 100% layout

    - by serg
    I am trying to build the following layout (file browser type of thing, left block would contain a list of files, right panel would contain selected file content): <------------- MENU -------------------> <--- LEFT ----><------- RIGHT ---------> <--- LEFT ----><------- RIGHT ---------> <--- LEFT ----><------- RIGHT ---------> <--- LEFT ----><------- RIGHT ---------> <--- LEFT ----><------- RIGHT ---------> <--- LEFT ----><------- RIGHT ---------> The page itself shouldn't have any scrollbars. Menu has 100% width and fixed height Left block has fixed width and 100% height. If content is taller - scroll bar appears inside the left block only. Right block contains <pre> element and takes the remaining width and 100% height. If content is wider or taller - scrollbar appears inside the right block only. This is what I have so far: http://jsbin.com/uqegi4/3/edit The problem is fixed menu height messes up 100% height calculation and all scrollbars inside left and right blocks appear at wrong time. I don't care about cross browser compatibility, only Chrome matters. Thanks.

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  • Custom Android layout that handles its children

    - by Gromix
    Hi, I'm trying to create a custom Android control to emulate a LinearLayout with a fancier display. Basically, I want the exact behaviour of a LinearLayout, but also borders, a background, ... I could do it all in XML (works great) but since I have dozens of occurences in my app it's getting hard to maintain. I thought it would be nicer to have something like this: /* Main.xml */ <MyFancyLayout> <TextView /> <ImageView /> </MyfancyLayout> My problem is, I don't want to have to re-write LinearLayout, so is there a way to only change its appearance? I got as far as this, which doesn't work... can anyone think of a better approach? /* MyFancyLayout.xml */ <merge> ... the complex hierarchy to make it look like what I want ... with background attributes etc </merge> and /* MyFancyLayout.java */ public class MyFancyLayout extends LinearLayout { // inflate the XML // move all the real children (as given by main.xml) to the inflated layout // do I still need to override onMeasure and onLayout? } Cheers! Romain

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  • Android Linear Layout steching

    - by Maffo
    Hi, I think that's a rather simple Question but I don't get it the way I want it to. I Want do do a Linear Layout in Android with 3 areas. The Top area should have a fixed height, fill_parent width. The second, below the first, should use all the room available, fill_parent width. The third, below the second, should have fixed height, fill_parent width. Here is what i got: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" android:gravity="bottom" android:background="#ff63a920"> <LinearLayout android:id="@+id/top_bar" android:layout_width="fill_parent" android:layout_height="32dp" > </LinearLayout> <com.google.android.maps.MapView android:id="@+id/mymapView" android:layout_width="fill_parent" android:layout_height="fill_parent" android:enabled="true" android:clickable="true" /> <LinearLayout android:id="@+id/bottombar" android:layout_width="fill_parent" android:layout_height="32dp" > </LinearLayout> </LinearLayout> The Problem is, that the mapview in the middle ist too big, so it pushes out the topbar. I Hope you can help me.

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  • HTML columns or rows for form layout?

    - by Valera
    I'm building a bunch of forms that have labels and corresponding fields (input element or more complex elements). Labels go on the left, fields go on the right. Labels in a given form should all be a specific width so that the fields all line up vertically. There are two ways (maybe more?) of achieving this: Rows: Float each label and each field left. Put each label and field in a field-row div/container. Set label width to some specific number. With this approach labels on different forms will have different widths, because they'll depend on the width of the text in the longest label. Columns: Put all labels in one div/container that's floated left, put all fields in another floated left container with padding-left set. This way the labels and even the label container don't need to have their widths set, because the column layout and the padding-left will uniformly take care of vertically lining up all the fields. So approach #2 seems to be easier to implement (because the widths don't need to be set all the time), but I think it's also less object oriented, because a label and a field that goes with that label are not grouped together, as they are in approach #1. Also, if building forms dynamically, approach #2 doesn't work as well with functions like addRow(label, field), since it would have to know about the label and the field containers, instead of just creating/adding one field-row element. Which approach do you think is better? Is there another, better approach than these two?

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  • How to align Buttons in a TableLayout to different directions?

    - by Bevor
    Hello, probably I don't understand the layout properties of TableLayout yet. It doesn't seem to be possible to achieve such a flexible table like in HTML, because there are no cells. My target is it to achieve such a layout: Link to draft How can I do that? I thought about using a GridView but this doesn't seem to be useful in XML. My efforts look like this: <TableLayout android:id="@+id/tableLayout" android:layout_width="320sp" android:layout_height="fill_parent" android:layout_gravity="center_horizontal" android:gravity="bottom" android:layout_alignParentBottom="true"> <TableRow android:background="#333333" android:gravity="bottom" android:layout_width="fill_parent"> <Button android:id="@+id/btnUp" android:layout_width="60sp" android:layout_height="50sp" android:gravity="left" android:text="Lift U" /> <Button android:id="@+id/btnScreenUp" android:gravity="right" android:layout_gravity="right" android:layout_width="60sp" android:layout_height="50sp" android:text="Scrn U" /> </TableRow> <TableRow android:background="#444444" android:gravity="bottom" android:layout_gravity="right"> <Button android:id="@+id/btnDown" android:layout_width="60sp" android:layout_height="50sp" android:text="Lift D" /> <Button android:id="@+id/btnScreenLeft" android:layout_width="60sp" android:layout_height="50sp" android:gravity="right" android:layout_gravity="right" android:text="Scrn L" /> <Button android:id="@+id/btnScreenDown" android:layout_width="60sp" android:layout_height="50sp" android:gravity="right" android:layout_gravity="right" android:text="Scrn D" /> <Button android:id="@+id/btnScreenRight" android:layout_width="60sp" android:layout_height="50sp" android:gravity="right" android:layout_gravity="right" android:text="Scrn R" /> </TableRow> </TableLayout>

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  • Multiple screen support in android?

    - by Yugesh
    In my application have six buttons,the screen size is 4.65" 720p(720X1280 : xhdpi),device take this resolution from normal layout folder.when i run it in device.it display like the image am shown below.how to set this six buttons fit to the screen according to layout width and height.I don't know how to do.Can any one know please help me to solve this problem. My XML coding <?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:id="@+id/home_xml" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#ffffff" > <Button android:id="@+id/btn_login" android:layout_width="101dp" android:layout_height="193dp" android:layout_alignParentLeft="true" android:layout_below="@+id/imageView1" android:layout_marginLeft="4dp" android:layout_marginTop="78dp" android:background="@drawable/login_button" /> <Button android:id="@+id/btn_order" android:layout_width="101dp" android:layout_height="wrap_content" android:layout_alignBottom="@+id/btn_login" android:layout_alignTop="@+id/btn_login" android:layout_marginLeft="3dp" android:layout_toRightOf="@+id/btn_login" android:background="@drawable/order_button" /> <Button android:id="@+id/btn_abtus" android:layout_width="101dp" android:layout_height="wrap_content" android:layout_alignBottom="@+id/btn_order" android:layout_alignTop="@+id/btn_order" android:layout_marginLeft="3dp" android:layout_toRightOf="@+id/btn_order" android:background="@drawable/aboutus_button" /> <Button android:id="@+id/btn_outlet" android:layout_width="100dp" android:layout_height="198dp" android:layout_alignLeft="@+id/btn_login" android:layout_alignRight="@+id/btn_login" android:layout_below="@+id/btn_login" android:background="@drawable/outlets_button" /> <Button android:id="@+id/btn_feedback" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBottom="@+id/btn_outlet" android:layout_alignLeft="@+id/btn_order" android:layout_alignRight="@+id/btn_order" android:layout_alignTop="@+id/btn_outlet" android:background="@drawable/feedback_button" /> <Button android:id="@+id/btn_games" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignBottom="@+id/btn_feedback" android:layout_alignLeft="@+id/btn_abtus" android:layout_alignRight="@+id/btn_abtus" android:layout_alignTop="@+id/btn_feedback" android:background="@drawable/games_button" /> <RelativeLayout android:id="@+id/relativeLayout1" android:layout_width="match_parent" android:layout_height="44dp" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:background="#98110e" > </RelativeLayout>

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  • Control layout using graphviz twopi

    - by vy32
    I am trying to draw a graph showing search prefixes using twopi. I have a simple input file and am getting this output: (full image) Here is the input file: digraph search { // ordering=out; // color=blue; // rank=same; // overlap=scale; rankdir=LR; root=root; ranksep=1.25; overlap=true; "root"; a [color=none,fontsize=12]; b [color=none,fontsize=12]; c [color=none,fontsize=12]; d [color=none,fontsize=12]; e [color=none,fontsize=12]; f [color=none,fontsize=12]; #g [color=none,fontsize=12]; h [color=none,fontsize=12]; i [color=none,fontsize=12]; j [color=none,fontsize=12]; k [color=none,fontsize=12]; l [color=none,fontsize=12]; m [color=none,fontsize=12]; n [color=none,fontsize=12]; o [color=none,fontsize=12]; p [color=none,fontsize=12]; q [color=none,fontsize=12]; r [color=none,fontsize=12]; s [color=none,fontsize=12]; t [color=none,fontsize=12]; u [color=none,fontsize=12]; v [color=none,fontsize=12]; w [color=none,fontsize=12]; x [color=none,fontsize=12]; y [color=none,fontsize=12]; #ga [color=none,fontsize=12]; gb [color=none,fontsize=12]; gc [color=none,fontsize=12]; gd [color=none,fontsize=12]; ge [color=none,fontsize=12]; gf [color=none,fontsize=12]; gg [color=none,fontsize=12]; gh [color=none,fontsize=12]; gi [color=none,fontsize=12]; gj [color=none,fontsize=12]; gk [color=none,fontsize=12]; gl [color=none,fontsize=12]; gm [color=none,fontsize=12]; gn [color=none,fontsize=12]; go [color=none,fontsize=12]; gp [color=none,fontsize=12]; gq [color=none,fontsize=12]; gr [color=none,fontsize=12]; gs [color=none,fontsize=12]; gt [color=none,fontsize=12]; gu [color=none,fontsize=12]; gv [color=none,fontsize=12]; gw [color=none,fontsize=12]; gx [color=none,fontsize=12]; gy [color=none,fontsize=12]; gaa [color=none,fontsize=12]; gab [color=none,fontsize=12]; gac [color=none,fontsize=12]; gad [color=none,fontsize=12]; gae [color=none,fontsize=12]; gaf [color=none,fontsize=12]; gag [color=none,fontsize=12]; gah [color=none,fontsize=12]; gai [color=none,fontsize=12]; gaj [color=none,fontsize=12]; gak [color=none,fontsize=12]; gal [color=none,fontsize=12]; gam [color=none,fontsize=12]; gan [color=none,fontsize=12]; gao [color=none,fontsize=12]; gap [color=none,fontsize=12]; gaq [color=none,fontsize=12]; #gaz [color=none,fontsize=12]; gas [color=none,fontsize=12]; gat [color=none,fontsize=12]; gau [color=none,fontsize=12]; gav [color=none,fontsize=12]; gaw [color=none,fontsize=12]; gax [color=none,fontsize=12]; gay [color=none,fontsize=12]; gaza [color=none,fontsize=12]; gazb [color=none,fontsize=12]; gazc [color=none,fontsize=12]; gazd [color=none,fontsize=12]; gaze [color=none,fontsize=12]; #gazf [color=none,fontsize=12]; gazg [color=none,fontsize=12]; gazh [color=none,fontsize=12]; gazi [color=none,fontsize=12]; gazj [color=none,fontsize=12]; gazk [color=none,fontsize=12]; gazl [color=none,fontsize=12]; gazm [color=none,fontsize=12]; gazn [color=none,fontsize=12]; gazo [color=none,fontsize=12]; gazp [color=none,fontsize=12]; gazq [color=none,fontsize=12]; gazr [color=none,fontsize=12]; gazs [color=none,fontsize=12]; gazt [color=none,fontsize=12]; gazu [color=none,fontsize=12]; gazv [color=none,fontsize=12]; gazw [color=none,fontsize=12]; gazx [color=none,fontsize=12]; gazy [color=none,fontsize=12]; root -> a [minlen=2]; root -> b [minlen=2]; root -> c [minlen=2]; root -> d [minlen=2]; root -> e [minlen=2]; root -> f [minlen=2]; root -> g [minlen=2]; root -> h [minlen=2]; root -> i [minlen=2]; root -> j [minlen=2]; root -> k [minlen=2]; root -> l [minlen=2]; root -> m [minlen=2]; root -> n [minlen=2]; root -> o [minlen=2]; root -> p [minlen=2]; root -> q [minlen=2]; root -> r [minlen=2]; root -> s [minlen=20]; root -> t [minlen=2]; root -> u [minlen=2]; root -> v [minlen=2]; root -> w [minlen=2]; root -> x [minlen=2]; root -> y [minlen=2]; root -> 0 [minlen=2]; root -> 1 [minlen=2]; root -> 2 [minlen=2]; root -> 3 [minlen=2]; root -> 4 [minlen=2]; root -> 5 [minlen=2]; root -> 6 [minlen=2]; root -> 7 [minlen=2]; root -> 8 [minlen=2]; root -> 9 [minlen=2]; root -> "." [minlen=2]; g -> ga ; g -> gb ; g -> gc ; g -> gd ; g -> ge ; g -> gf ; g -> gg ; g -> gh ; g -> gi ; g -> gj ; g -> gk ; g -> gl ; g -> gm ; g -> gn ; g -> go ; g -> gp ; g -> gq ; g -> gr ; g -> gs ; g -> gt ; g -> gu ; g -> gv ; g -> gw ; g -> gx ; g -> gy ; ga -> gaa ; ga -> gab ; ga -> gac ; ga -> gad ; ga -> gae ; ga -> gaf ; ga -> gag ; ga -> gah ; ga -> gai ; ga -> gaj ; ga -> gak ; ga -> gal ; ga -> gam ; ga -> gan ; ga -> gao ; ga -> gap ; ga -> gaq ; ga -> gaz ; ga -> gas ; ga -> gat ; ga -> gau ; ga -> gav ; ga -> gaw ; ga -> gax ; ga -> gay ; gaz -> gaza ; gaz -> gazb ; gaz -> gazc ; gaz -> gazd ; gaz -> gaze ; gaz -> gazf ; gaz -> gazg ; gaz -> gazh ; gaz -> gazi ; gaz -> gazj ; gaz -> gazk ; gaz -> gazl ; gaz -> gazm ; gaz -> gazn ; gaz -> gazo ; gaz -> gazp ; gaz -> gazq ; gaz -> gazr ; gaz -> gazs ; gaz -> gazt ; gaz -> gazu ; gaz -> gazv ; gaz -> gazw ; gaz -> gazx ; gaz -> gazy ; gazo -> "Blue Tuesday" ; "Blue Tuesday" [ fontsize=10]; // Layout engines: circo dot fdp neato nop nop1 nop2 osage patchwork sfdp twopi } This output is generated with: twopi -os1.png -Tpng s1.dot I'm posting here because the printout is pretty dreadful. All of the nodes hung of "gaz" are overlapping; I've tried specifying nodesep and it is simply ignored. I would like to see the lines from root to the single letters further apart, but again, I can't control that. This seems to be a bug in twopi. The documentation says it should clearly follow these directives, but it doesn't seem to. My questions: Is there any way to make twopi behave? Failing that, is there a better layout engine to use? Thanks.

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  • How to set binding in xaml to my own variable

    - by Victor
    Hello. I have an object in the code: public class UserLogin { bool _IsUserLogin = false; public bool IsUserLogin { get { return _IsUserLogin; } set { _IsUserLogin = value; } } public UserLogin() { _IsUserLogin = false; } } .... public static UserLogin LoginState; ..... LoginState = new UserLogin(); And I need to set bindings to Button.IsEnabled property. I.e. when user not login yet - some buttons are disabled. How can this been done? I have try in xaml: <Button DataContext="LoginState" IsEnabled="{Binding Path=IsUserLogin}"> but, this dos't work and OutputWindow says: System.Windows.Data Error: 39 : BindingExpression path error: 'IsUserLogin' property not found on 'object'. I also have try to set Button.DataContext property to LoginState in the code, but have XamlParseException. I also read this one [http://stackoverflow.com/questions/1829758/wpf-binding-in-xaml-to-an-object-created-in-the-code-behind][1] but still can't set bindings. [1]: http://stackoverflow.com/questions/1829758/wpf-binding-in-xaml-to-an-object-created-in-the-code-behind. Please help!

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  • Android -- How to position View off-screen?

    - by borg17of20
    Hello all, I'm trying to animate a simple ImageView in my application and I want it to slide in from the bottom of the screen and come to a resting position where the top 50px of the view is off the top of the screen (e.g. the final position of the ImageView should be -50px in X). I've tried to use the AbsoluteLayout to do this, but this actually cuts off the top 50px of the ImageView such that the top 50px is never rendered. I need to have the top 50px of the ImageView visible/rendered while it's animating and then simply have it come to a rest slightly off-screen. I hope I've explained that well enough. Here is what I'm currently using as a layout and the slide-in animation (this currently doesn't render the top 50px of the ImageView): Layout: <?xml version="1.0" encoding="utf-8"?> <AbsoluteLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_height="fill_parent" android:layout_width="fill_parent" android:id="@+id/QuickPlayClipLayout"> <ImageView android:id="@+id/Clip" android:background="@drawable/clip" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_y="-50dp"> </ImageView> </AbsoluteLayout> Animation: <?xml version="1.0" encoding="utf-8"?> <set xmlns:android="http://schemas.android.com/apk/res/android"> <translate android:fromYDelta="100%p" android:toYDelta="0" android:duration="1000"/> <alpha android:fromAlpha="0.0" android:toAlpha="1.0" android:duration="1000" /> </set> Thanks in advance.

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  • Memory leak while asynchronously loading BitmapSource images

    - by harry
    I have a fair few images that I'm loading into a ListBox in my WPF application. Originally I was using GDI to resize the images (the originals take up far too much memory). That was fine, except they were taking about 400ms per image. Not so fine. So in search of another solution I found a method that uses TransformedBitmap (which inherits from BitmapSource). That's great, I thought, I can use that. Except I'm now getting memory leaks somewhere... I'm loading the images asynchronously using a BackgroundWorker like so: BitmapSource bs = ImageUtils.ResizeBitmapSource(ImageUtils.GetImageSource(photo.FullName)); //BitmapSource bs = ImageUtils.GetImageSource(photo.FullName); bs.Freeze(); this.dispatcher.Invoke(new Action(() => { photo.Source = bs; })); GetImageSource just gets the Bitmap from the path and then converts to BitmapSource. Here's the code snippet for ResizeBitmapSource: const int thumbnailSize = 200; int width; int height; if (bs.Width > bs.Height) { width = thumbnailSize; height = (int)(bs.Height * thumbnailSize / bs.Width); } else { height = thumbnailSize; width = (int)(bs.Width * thumbnailSize / bs.Height); } BitmapSource tbBitmap = new TransformedBitmap(bs, new ScaleTransform(width / bs.Width, height / bs.Height, 0, 0)); return tbBitmap; That code is essentially the code from: http://rongchaua.net/blog/c-wpf-fast-image-resize/ Any ideas what could be causing the leak?

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  • Android ListView appears empty, but contains objects

    - by Lethjakman
    I'm having a really odd problem with my android listview. The listview is inside of a fragment, everything's compiling and I'm no longer getting a nullpointer error, but the listview is appearing empty. Even though it's appearing empty, the log is stating that the listview has 385 objects. I can't figure out why it's empty. I do get a blue fragment, and the listview is populated. Any ideas? How I set the adapter: ActivePackages = getList(); LayoutInflater inflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE); LinearLayout mContainer = (LinearLayout) inflater.inflate(R.layout.tab_frag1_layout, null); ListView activeList = (ListView) mContainer.findViewById(R.id.activelist); ArrayAdapter<String> adapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, android.R.id.text1, ActivePackages); Log.i("valueof activeList",String.valueOf(activeList.getCount())); //returns 0 activeList.setAdapter(adapter); adapter.notifyDataSetChanged(); Log.i("valueof activeList",String.valueOf(activeList.getCount())); //returns 385. This is the xml for the fragment: <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" > <ListView android:id="@+id/activelist" android:layout_width="match_parent" android:layout_height="match_parent" android:background="#0073fd"> </ListView> </LinearLayout>

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  • video calling (center)

    - by rrejc
    We are starting to develop a new application and I'm searching for information/tips/guides on application architecture. Application should: read the data from an external (USB) device send the data to the remote server (through internet) receive the data from the remote server perform a video call with to the calling (support) center receive a video call call from the calling (support) center support touch screens In addition: some of the data should also be visible through the web page. So I was thinking about: On the server side: use the database (probably MS SQL) use ORM (nHibernate) to map the data from the DB to the domain objects create a layer with business logic in C# create a web (WCF) services (for client application) create an asp.net mvc application (for item 7.) to enable data view through the browser On the client side I would use WPF 4 application which will communicate with external device and the wcf services on the server. So far so good. Now the problem begins. I have no idea how to create a video call (outgoing or incoming) part of the application. I believe that there is no problem to communicate with microphone, speaker, camera with WPF/C#. But how to communicate with the call center? What protocol and encoding should be used? I think that I will need to create some kind of server which will: have a list of operators in the calling center and track which operator is occupied and which operator is free have a list of connected end users receive incoming calls from end users and delegate call to free operator delegate calls from calling center to the end user Any info, link, anything on where to start would be much appreciated. Many thanks!

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  • Silverlight databinding error

    - by Petezah
    I found an example online that explains how to perform databinding to a ListBox control using LINQ in WPF. The example works fine but when I replicate the same code in Silverlight it doesn't work. Is there a fundamental difference between Silverlight and WPF that I'm not aware of? Here is an Example of the XAML: <ListBox x:Name="listBox1"> <ListBox.ItemTemplate> <DataTemplate> <StackPanel> <TextBlock Text="{Binding Name}" FontSize="18"/> <TextBlock Text="{Binding Role}" /> </StackPanel> </DataTemplate> </ListBox.ItemTemplate> </ListBox> Here is an example of my code behind: private void UserControl_Loaded(object sender, RoutedEventArgs e) { string[] names = new string[] { "Captain Avatar", "Derek Wildstar", "Queen Starsha" }; string[] roles = new string[] { "Hero", "Captain", "Queen of Iscandar" }; listBox1.ItemSource = from n in names from r in roles select new { Name = n, Role = r} }

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  • Manipulating collections & the ViewModel pattern

    - by Kragen
    I'm relatively new to WPF, and I'm having trouble with what I'm fairly certain is a relatively simple problem. I have my underlying data object, a Person: class Person { public string Surname {get; set; } public string Firstname {get; set; } public List<Address> Addresses {get; } } And I wish to display and edit this object in my WPF app. To this end I've created a ViewModel that I bind to in my xaml: class PersonViewModel { public string Fullname {get; } public ObservableCollection<AddressViewModel> Addresses {get; } } This is fine, except when it comes to manipulating my Address collection, where I can't work out what I should be doing: Should I add methods AddAddress, RemoveAddress etc... to my PersonViewModel class for manipulating my collection with instances of AddressViewModel Should I just add instances of AddressViewModel to my Addresses observable collection Both of the above seem a bit messy - is there a better way of dealing with collections?

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  • Truncating long strings with CSS: feasible yet?

    - by Sam Stokes
    Is there any good way of truncating text with plain HTML and CSS, so that dynamic content can fit in a fixed-width-and-height layout? I've been truncating server-side by logical width (i.e. a blindly-guessed number of characters), but since a 'w' is wider than an 'i' this tends to be suboptimal, and also requires me to re-guess (and keep tweaking) the number of characters for every fixed width. Ideally the truncation would happen in the browser, which knows the physical width of the rendered text. I've found that IE has a text-overflow: ellipsis property that does exactly what I want, but I need this to be cross-browser. This property seems to be (somewhat?) standard but isn't supported by Firefox. I've found various workarounds based on overflow: hidden, but they either don't display an ellipsis (I want the user to know the content was truncated), or display it all the time (even if the content wasn't truncated). Does anyone have a good way of fitting dynamic text in a fixed layout, or is server-side truncation by logical width as good as I'm going to get for now?

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  • Programmatically creating a clickable area on an image.

    - by Thomas Stock
    Hi, I'm trying to create "imagemaps" on an image in wpf using codebehind. See the following XML: <Button Type="Area"> <Point X="100" Y="100"></Point> <Point X="100" Y="200"></Point> <Point X="200" Y="200"></Point> <Point X="200" Y="100"></Point> <Point X="150" Y="150"></Point> </Button> I'm trying to translate this to a button on a certain image in my WPF app. I've already did a part of this, but I'm stuck at setting the Polygon as the button's "template": private Button GetAreaButton(XElement buttonNode) { // get points PointCollection buttonPointCollection = new PointCollection(); foreach (var pointNode in buttonNode.Elements("Point")) { buttonPointCollection.Add(new Point((int)pointNode.Attribute("X"), (int)pointNode.Attribute("Y"))); } // create polygon Polygon myPolygon = new Polygon(); myPolygon.Points = buttonPointCollection; myPolygon.Stroke = Brushes.Yellow; myPolygon.StrokeThickness = 2; // create button based on polygon Button button = new Button(); ????? } I'm also unsure on how to add/remove this button to/from my image, but I'm looking into that. Any help is appreciated.

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  • XBAP Browser Control - Invoking Click event of the html Input type button

    - by maharaj
    Hi, Here is what I have. 1.XBAP application with WPF Browser control, hosted on Page1.xaml 2.XBAP in Full Trust, certificate installed in client browser 3.Once the XBAP loaded, the browser control is navigated to some third party site. 4.We are using MVVM for XAML stuff So, when a certain page is loaded, I attach click event handler to the input button with id="submit" on the html page displayed in the browser control (used the code similar to whats in this URL http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/a4f0e4d0-78bf-44c5-a3fe-8faf2e7a0568/). It works just fine as long as I dont make a wcf web service call in my ViewModel, before or after I attach this event hander. Idea is to invoke the click event for the html button and grab the data from the html page before calling the webservice to save data from the page. Here is the issue: When I make the wcf webservice call (sync or async, it doesnt matter) the click event doesnt happen but if I comment out the the code for wcf service call the click event of the html input of type button gets invoked. Any help would be appreciated. Thanks, Salil

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