Model View Control

Hi.. i need some help when designing the view part of my application. My main problem is that sometimes i do not know how to separate the control code from the one needed in the view part.For example, if I have some componentes(implementes mouse motion listener) that can be moved., that code where should it goes?

My 2 Shekels' worth (for what it's worth):
1) Perhaps a component should not implement a Listener.
2) Rather the component could be part of the View
3) And the Listener could be part of the Control.
4) The Model holds the position of the movable component.
5) The MouseListeners of the Control tell the Model when a move occurs.
6) The Model notifies the View that a change has occurred (Observer Pattern)
7) The View queries the Model's state and changes itself accordingly.

Similar Messages

Model View Control help!

Hi!
I have a var in Model called "age". From ActionPerformed in Control I want to take the value from a JTextField in View and update age. How do I do this?
ActionPerformed is triggered by a JButton..
Thx!

With MVC you should create the model, view and controller in a driver class that creates all the compoents of the MVC and merges them together. You should be passing the model as a parm to the view in the constructor.
Example Driver Class:
public MVCDriverClass {
// constructor and any other methods needed
public void initialize() {
    MyModelInterface model = new MyModel();
    MyViewInterface view = new MyView();
    MyControllerInterface controller = new MyController(mode, view);
    model.initialize();
    view.initialize();
    view.showView();
}Now in your model you need to make sure you are using the Observer pattern to notify all observers of any changes to the data model. Java already implements this for you if you want to use its utils. You simply need to extend the Observable class on your model to make it the subject and implement the Observer interface on each view you want the Subject (Observer) to notify of changes. You will see that the Observer interface has a method named update(Observer o, Object arg). You simply place any code in here that you need to update your UI values with. Let me know if you need any examples.

Model view control & JProgressBar

hello,
I didn't understand to handle with the Progressbar.
For example when want to represent the download of a file:
I have a class TransferE (Entity), which does the transfer of the file
I have a class TransferUI (User Interface) for the user interface
I have a class TransferC (Control) between ui and entity
now how to update the progressbar?
The download need to run in an own Thread i think.
Do I have to run an extra Thread in the UI to get the status in a specified interval?
Or can I give the ProgressBar to the Entityclass as parameter, so that the bar will be updated in the entity's run()-method?
cheers
Tobias

Hi, I had a similar question/problem. its not that i don't know how to use a progress bar (or maybe i don't), its more an issue of design. if we pass the progress bar to an entity or control class then we are mixing interface code with entity or control code. after all these two do not need to know the progress of their methods. its seems that which ever way it is done when we use progress bars, this problem arises. i wonder if there is a way to find out whether a method has completed or not just by its execution

All View controls disabled when in Transform dialogue... WHY?

Transform Each. A reasonably useful, if minimalistic dialog box disables ALL view controls.
Including Zoom and Pan.
And of course the really useful stuff, like hide Bounding Boxes and Frames/Edges and Guides... they also don't work.
Why such a monochromatic and linear way of working in 2013?
Has Adobe spent NON of its record profits on hiring more programmers?
Are their any scripts that get around this heinous oversight, left over from what... 1995?

Again: The users here cannot tell you why. Illustrator is a very old and archaic program that has not kept up with the times. But you already know that.
Or is there another explanation?
There are other speculations. Mine is simply that the user base continues to tolerate it. In the end, that's why. If you need further explanation, read on:
Adobe created PostScript in the 80s. Adobe has dominated the graphics industry ever since. So people buy Illustrator because it carries the Adobe brand. None of this has changed.
It becomes a self-fullfilling cycle. Newcomers buy Illustrator early-on assuming it is the "safe bet" because it carries the Adobe brand. As a result, most Illustrator users have very little experience with any other mainstream 2D Bezier drawing programs, if any at all. Longtime Illustrator-only users become increasingly vested in its archaic and cumbersome interface and fearful of having to apply that kind of learning effort to any other program. They--in self-protective turn--advise newcomers that it is the "professional" choice; the "safe bet."
So the cycle repeats.
Illustrator-only users assume Illustrator's feature set to be "state of the art" for its software category. Adobe's marketing, of course, sustains this myth.
And a comedy of absurdity ensues. Literal decades pass before Illustrator users realize that "page 2" is not only possible but valuable in a drawing program. The year 2013 (and who knows how many more) comes and goes without Illustrator ever acquiring the most basic functionality of a proper set of basic live geometric shape tools. You are just discovering this. But it is nothing new. It's the way it's always been.
Adobe continues to market the same archaic functional underpinnings with occasional window-dressing changes of the UI skin. Functionality long taken for granted in other Bezier drawing programs is only occasionally added and even then in a half-baked fashion being hamstrung by devoted adherance to an outdated interface foundation which Adobe dares not change lest risk alienating existing users.
The interface becomes increasingly scattered, cluttered, redundant, inconsistent and old-fashioned despite its ever-changing stylistic facade. The resulting complicated confusion is perceived by newcomers as "powerful" and "full featured" thinking that must be why it's so unintuitve. They come here to ask "how" and to become vested in the highly esoteric learning curve.
And the cycle repeats.
Other vendors try to capture/maintain market share by emulating the most prevalent interface schema in hopes of easing the "transition" to their products. They concentrate more on replicating the same old Illustrator functionality than on innovation, even when their interface foundations are superior. Illustrator's interface scheme becomes the defacto standard and the whole software segment stagnates in an endless cycle of "me, too" offerings.
Illustrator's domination thereby effectively holds the entire segment in decades-old lethargy. Users become adicted to the same old mediocrity.
Meanwhile, other graphics softwares in growth segments march on. The users of 3D modeling, for example, enjoy a plethora of different interface schemes, each competing to deliver both superior functionality and a superior user experience. The user base assumes a stance of versatility and adaptability and is less dogmatically defensive of a paticular software. Obtaining and maintaining working proficiency in multiple programs is considered the norm. And the category advances, becoming more powerful even while becoming more affordable (growth).
Energetic beginners devote their efforts to energetic developments: mobile apps and platforms, scripting, data-driven solutions, gaming. Open source innovates in terms of business model, if not in terms of software functionality, and delivers powerful apps at near zero price.
And everyone yawns at the 2D drawing segment and "yesterday's news" appears increasingly archaic as its stagnation continues. And it sadly continues to fail to achieve its yet-to-be-realized potential.
Eventually self-fullfilling cycles are broken. Eventually. The latest disturbance to this particular cycle comes from Adobe itself: It's self-defensive, self-perpetuating rent-only license scheme.
It is yet to be seen if this also becomes a trend with other software vendors, or if it breaks Adobe's stranglehold on the market. If tolerated by the user base, it certainly becomes more revenue-generating for the vendor (at least for a time) and self-perpetuating as customers willingly become entrapped by vendor-specific dependency. That lets the vendor deliver less value at same (or even less) cost, while maintaining same (or even higher) price. It's every software vendor's dream.
It's every monopolist's dream. It's every socialist's dream. And it works (for a time) if only enough customers are successully are suckered into it. But eventually, even Berlin Walls and long-distance phone call pricing schemes come down. The cost and pain of the self-protective, self-perpetuating cycle's end is directly proportional to how long its damage is allowed to continue. It's best to nip such cycles in the bud. But history proves that doesn't always happen.
So there's your reason "why": It's what the customers buy, driven by what they buy into.
JET

Tree view control - populating speed - over 100 nodes

I have a few questions about a tree view control:
1. If you put more than approximately 100 nodes in a tree, it populates too slow. There is no change if you try with query or record group. I figured that the populating of the record group makes all problems, but there is no chance to enlarge the array siye of the record group. Developer 6 has some built-ins which can do that, bu after many unsuccesful tries I don't see a solution.
I tried to make fetches from cursor into a record group (30 nodes on a "page", but it looses a real hierarchy and you should do a lot of programming). If anybody knows how to make the population of the tree faster or have some template / please forward.
2. After we put the patch 5 of developer6, tree view control is totally unpredictable. Usually its when you programmaticaly try to select a node (ftree.set_tree_selection)...Anybody have the same problems?

<BLOCKQUOTE>quote:<HR>Originally posted by Natasa Stojovska ([email protected]):
I have a few questions about a tree view control:
1. If you put more than approximately 100 nodes in a tree, it populates too slow. There is no change if you try with query or record group. I figured that the populating of the record group makes all problems, but there is no chance to enlarge the array siye of the record group. Developer 6 has some built-ins which can do that, bu after many unsuccesful tries I don't see a solution.
I tried to make fetches from cursor into a record group (30 nodes on a "page", but it looses a real hierarchy and you should do a lot of programming). If anybody knows how to make the population of the tree faster or have some template / please forward.
<HR></BLOCKQUOTE>
Try taking out the 'start with' and 'connect by' clauses in your select statement if you're using them. However, this will mean that you will have to determine the levels of the tree manually and ensure that the data comes out in the same order each time you execute the select statement.
null

Problem in crystal report viewer control's toolbar "export"button using SSL

Hi,
I would like to ask. My project is using BO XI Release 2 and VS-Studio 2005. Initially my project doesn't use SSL... At that time when i view the report with crystal report viewer control and can export (using built-in toolbar "export button"). Now project is using SSL and canu2019t export the error is
u201CInternet Explorer cannot download file from server.
Internet Explorer was not able to open this Internet site. The requested site is either unavailable or cannot be found. Please try again later.u201D
Actually this error can solve "Cache-control" change to "no-cache". But I donu2019t know in crystal reportu2026
Anyone can help ???
Thanks

In Internet Explorer, go to Tools -> Internet Options -> Advanced and ensure "Do not save encrypted pages to disk" is unchecked.
Default is to have that option checked.
It was considered a IE security issue that IE saves all content to temp disk location unencrypted, even those pages served by HTTPS (for example, let's say you use HTTPS to download your bank info, and it's stored to temp disk for someone else to retrieve later). So more recent versions of IE implemented that option setting.
How that option setting works is strange - it downloads the file, saves to disk, then deletes the copy from the disk immediately, before passing it to the application responsible for the MIME type. So the application tries to open a directory path to a non-existing file.
Issue is specific to IE, and it's not something you can control via the SDK.
Sincerely,
Ted Ueda

Crystal Report Viewer Control error

Please Help, I have a web application developed in .net 2005 which is using crystal reports developer product version 10.0.0.533.
This web application with crystal is working fine on my local machine with OS windows xp, but on the windows server 2003 the application web form is running into "couldnot load file or assembly 'CrystalDecision.VSDesigner, Version=10.0.0.3300' or one of its dependencies"
I have compared the assembly information of my local machine with that of the server and could not see the crystaldecision.vsdesigner version 10.0.0.3300 on the server 2003. I have uninstalled microsoft .net 2005 and crystal reports and installed crystal first and visual studio .net 2005 next and vice versa but still could not see that particular assembly available in the windows 2003 server.
Please suggest as what to do for the assembly to be available on the server so crystal report viewer control can be created with out error. Thanks for any help.

Hello Sunitha,
Visual Studios 2005 ships with a bundled edition of Crystal Reports. This bundled edition is based on the v10 code stream, but it is not CR10. It's CR.NET for Visual Studios and it's v10.2. Crystal Reports 10.0 and the bundled CR.NET 10.2 for VS2005 are not interchangeable.
The stand alone version of Crystal Reports 10 is not expected to integrate correctly into VS2005. If you have CR10 Developer installed on your VS2005 machine you can force VS2005 to use the CR10.0 assemblies, but it is not supported.
You need to clean up your application so that it's referencing the 10.2 version assemblies and then deploy the 10.2 runtime files. You can visit the [Crystal Reports for Visual Studio .NET Runtime Distribution - Versions 9.1 to 12.0|https://www.sdn.sap.com/irj/scn/wiki?path=/display/bobj/crystalReportsruntimeforVisualStudio.NET] Wiki for a nice overview of the various versions of Crystal Reports, as well as a listing of the runtime files to match the version of Crystal Reports that is being used. For VS2005 and bundled CR.NET look at the "CR 10.2 (VS .NET 2005)" section of the Wiki.
Sincerely,
Dan Kelleher

Crystal Reports Viewer Control - Visual Studio 2008 WEB Application

My question is this: Has ANYONE on this planet been able to get the ASP .NET CR Viewer control to actually work?
Why does this editor NOT recognize End-of-line or CR characters or any whitespace??
I have developed a Crystal Reports "Viewer" web application in VS2008 using C#.
It's a simple app, in that it's a single page with a treeview control (containing the grouped names of the reports to which the user has access) and the CR Viewer control.
The report files live on a network share, and permissions to them is controlled via a SQL Server database, which, for each report, stores the UserID and Logion for the oracle database, as well as any required parameter values.
The reports themselves are all hititng an Oracle 10g database.
I managed to do this in a Windows desktop applcation using Visual Studio 2005 and VB .net, but now, upon trying to make this a web application in VS2008, I have completely failed. The application works when run locally, but when deployed to the web server, I experience database login prompts when I should not, (the dreaded "Report requires further information" message) even thought the setdatabaselogin has already been set. I have tried saving the reportdocument in viewstate and re-assigning the viewer Datasource property to it, that also fails. However, it only does it on some reports, and not others. (admittedly, the reports may have been created using different CR versions)
The viewer also displays data it should not be displaying when I attempt to scroll, when I do manage to get a report to run.
I am setting parameters dynamically at run time, whose values are stored in the SQL database.
Code Sample:
protected void ShowReport(int ReportID)
 SQLDataPortal2005.Common sql = new SQLDataPortal2005.Common();
 Hashtable outParms = new Hashtable();
 string sAccess;
 IDataReader dr;
 CrystalDecisions.CrystalReports.Engine.ReportDocument rptDocument = new CrystalDecisions.CrystalReports.Engine.ReportDocument();
 System.Security.Principal.WindowsPrincipal p = System.Threading.Thread.CurrentPrincipal as System.Security.Principal.WindowsPrincipal;
 sAccess = p.Identity.Name;
 int j = 0;
 int i = -1;
 if (!IsAdmin())
 sql.ExecNonQuery("CrystalReports", outParms, "proc_CRM_Check_Permissions", sAccess, Convert.ToInt32(TreeView1.SelectedNode.Value));
 if (outParms["@Allow"].ToString() != "True")
 Response.Redirect("ErrorPage.aspx"); // redirect to error page
 string sPath = System.Configuration.ConfigurationManager.AppSettings["WareHouse"].ToString();
 sPath = sPath + TreeView1.SelectedNode.Text.Trim() + ".rpt";
 rptDocument.Load(sPath);
 dr = sql.GetDataReader("CrystalReports", "proc_CRM_Get_Report", Convert.ToInt32(TreeView1.SelectedNode.Value));
 while (dr.Read() == true)
 j += 1;
 if (j < 2)
 rptDocument.SetDatabaseLogon(dr["DB_Login"].ToString(), dr["DB_Pwd"].ToString(), "PLAW", "LAWDB", true);
 pList = dr["ParmList"].ToString().Split(',');
 dr.Close();
 dr.Dispose();
 if (pList.Length > 0 && pList[0].ToString().Trim() != "")
 foreach (CrystalDecisions.Shared.ParameterField x in rptDocument.ParameterFields)
 i++;
 switch (x.ParameterValueType)
 case CrystalDecisions.Shared.ParameterValueKind.BooleanParameter:
 rptDocument.SetParameterValue(x.Name, Convert.ToBoolean(pList));
 break;
 case CrystalDecisions.Shared.ParameterValueKind.CurrencyParameter:
 rptDocument.SetParameterValue(x.Name, Convert.ToDouble(pList));
 break;
 case CrystalDecisions.Shared.ParameterValueKind.DateParameter:
 rptDocument.SetParameterValue(x.Name, Convert.ToDateTime(pList));
 break;
 case CrystalDecisions.Shared.ParameterValueKind.DateTimeParameter:
 rptDocument.SetParameterValue(x.Name, Convert.ToDateTime(pList));
 break;
 case CrystalDecisions.Shared.ParameterValueKind.NumberParameter:
 rptDocument.SetParameterValue(x.Name, Convert.ToInt32(pList));
 break;
 case CrystalDecisions.Shared.ParameterValueKind.StringParameter:
 rptDocument.SetParameterValue(x.Name, Convert.ToString(pList));
 break;
 case CrystalDecisions.Shared.ParameterValueKind.TimeParameter:
 rptDocument.SetParameterValue(x.Name, Convert.ToDateTime(pList));
 break;
 Session["CReport"] = rptDocument;
 CRV1.ReportSource = rptDocument;
 CRV1.DisplayGroupTree = false;
 CRV1.HasRefreshButton = true;
 CRV1.ShowFirstPage();
Is there a better/different way of accomplishing this very simply process? All I need this application to do is to view a report, while setting it's parmeters (if required) dynamically at run time. I don't EVER want the user to be prompted for DB LOGIN INFO.
Edited by: RichardK on May 10, 2010 4:14 PM
Edited by: RichardK on May 10, 2010 4:14 PM
Edited by: RichardK on May 10, 2010 4:16 PM
Edited by: RichardK on May 10, 2010 4:18 PM
Edited by: RichardK on May 10, 2010 4:22 PM
Edited by: RichardK on May 10, 2010 4:23 PM

To answer you question; Yes, I suspect that most of the users in this community have managed to successfully create web apps. And this is the tiniest of sampling of the developers out there...
A few suggestions;
1) Keep the posts to under 1200 characters. Otherwise, the formatting is lost which makes it difficult to read.
2) Try out a few sample apps from here:
https://wiki.sdn.sap.com/wiki/display/BOBJ/CrystalReportsfor.NETSDK+Samples
Suggest; csharp_web_simplelogonengine.zip, csharp_web_simplelogonviewer.zip and csharp_web_subreport_logon.zip.
3) Start simple; one table, one field, no subreports. Hard code the database logon parameters. Convince your self that this does work. Increase the complexity - add fields, tables, subreports. Do not mix connection methods (e.g.; if ODBC for main, than ODBC for sub is a good idea, though not a requirement).
4) See the article [Troubleshooting Guide to Database Connectivity Issues with Crystal Reports in Visual Studio .NET Applications|http://www.sdn.sap.com/irj/scn/index?rid=/library/uuid/b0225775-88c4-2c10-bd80-8298769293de].
5) See [this|http://www.sdn.sap.com/irj/boc/go/portal/prtroot/docs/library/uuid/d05b3bb7-0f28-2c10-4ea3-84dbdc4e414e?quicklink=index&overridelayout=true] article.
6) Consider creating a phone case here:
http://store.businessobjects.com/store/bobjamer/DisplayProductByTypePage&parentCategoryID=&categoryID=11522300
Ludek
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http://twitter.com/SAPCRNetSup

SSRS & Report Viewer control - Show the print button and fire print for multi page report in Mozilla & Chrome

I have reports in SSRS. I am using remote reports. Reports have multiple pages.
In IE, the print button displays, but in Firefox and Chrome, it does not display.
Below links shows how to display the print button for mozilla and chrome. These solutions only fire the print for the
current page in the report viewer-
http://stackoverflow.com/questions/951009/sql-reporting-services-print-button-not-shown-in-mozilla
http://stackoverflow.com/questions/4208457/ssrs-print-button-in-chrome-and-firefox
I need to be able to issue a print command for all
pages in one go from the reportviewer.

Hello,
The common workaround about print button on ReportViewer control for non-IE browsers is add ActiveX print control or create Print function. It has pros and cons.
I am not good at programming. But you can try to disable page breaks by setting InteractiveHeight to 0 so that the report will rendering in single page with Report Viewer control.
Regards,
Fanny Liu
Fanny Liu
TechNet Community Support

Input field in a table view control

Hi,
 I have a table view control, with input field in one of the columns.
 That is meant for entering some values.
 My problem is when i am entering a 3 input field with value and then by using mouse control i enter say 20th input field with value. After that when i use the directional keys to enter the 21st field, the cursor is not in 21st field, it is somewhere else.
How to correct this problem.
Regards,
Vijayalakshmi

Hi,
Try to use the TABINDEX property of <input>.
Best regards,
Guillaume

Total sum to be displayed in a table view control ?

Hi,
I am unable to display the total sum of a column in a table view control( using HTMLB ). How should one display the sum of a column ?
THanks in advance,
VaraPrasad

Hi,
it should work once you are restricting the capacity of the out put port then it should provide that much rows only otherwise its a Bug.
Alternativily you are tellin to disaply using sorting then add a Sort operator to the output port and the display ur output port in down order.
But first option should work just check it again.
On which SP u r working?
Regards,
Govindu

To display Total sum of a column in a table view control ?

Hi,
I am unable to display the sum of a column in a table view control ( using HTMLB ). How should one display the sum of a column in a table view control ?
Thanks in advance.
Vara.

Hi there, do a search in this forum for TableView Iterator. Then check out these weblogs:
/people/thomas.jung3/blog/2004/09/15/bsp-150-a-developer146s-journal-part-xi--table-view-iterators
/people/brian.mckellar/blog/2003/10/31/bsp-programming-htmlb-tableview-iterator
An Iterator is the way to go for you

Unable to Distribute Model View in BD64

Hi Gurus,
Model View - SR2CLNT251
Receiver of Model View - EA1CLNT251
i went to txcode bd64 > i clicked on model view SR2CLNT251 then went to edit > model view > distribute and clicking the logical system of EA1CLNT251. then error will be encountered.
Model view SR2CLNT251 has not been updated
Reason: No authorization to change model view SR2CLNT251
.....authorization object B_ALE_MODL
.....Parameter: activity 02, model view SR2CLNT251
i already given correct authorization to my ID, but still the error persists.
Please help. Thanks!
Regards,
Tony

Hi Tony,
You need authorization for authorization object 'B_ALE_MODL' in system I guess either in system SR2CLNT251 or in EA1CLNT251.
Best Regards,
Tushar

Mapping Variables(Object View) to Measures(Model View)

Hi,
In my AW, I have created a cube, And then I have created a new variable in the object view and populated it using load programs. Now. when I try to create a measure in the model view of the same cube based on this variable, I cannot see any option for assigning a variable to a measure. Can someone please help me out in doing this?
I need the measure in the model view, because it looks like, when I create a relational view, only the measures that are defined in the model are added to the view and not the variables available in the object model.
Thanks,
Bharat

Hi Bharat,
The mapping editor is used to map a measure to a relational data source. Therefore, unless you convert your data source used by your DML program to a relational table/view (if it is a text file you can use an external table to present the data to AWM as a relational table, or if it is an Excel spreadsheet and your database is on Windows you can use the heterogenous gateway service to load directly from Excel by exposing the Excel worksheet as a relational table) you will not be able to use the mapping editor.
To assign an OLAP variable to an measure within a cube you will need to create a custom calculated measure. This will allow you to create a measure that "maps" to your OLAP DML program. There is an Excel utility on the OLAP OTN home page that allows you to create custom calculated measures (at the moment this feature is not AWM10gR2 - but is available within AWM 11g). Click here for more information:
http://download.oracle.com/otn/java/olap/SpreadsheetCalcs_10203.zip
My advice would be to try and convert your data source to a relational table/view and using the mapping editor. This will allow you to benefit from the many new features within OLAP cube storage such as compressed composites, data compression, paralled processing, partitioning and aggregation maps. Of course you can code all this manually but it is much easier to let AWM do all this for you via a few mouse clicks. Please note - that everything you build outside of the AWM model view has to be managed (defined, updated, backed up etc) by you rather AWM. So while there are lots of advantages of using OLAP DML, I personally always try to load data into my OLAP cubes using AWM mappings and save OLAP DML for providing the advanced types of analysis that make OLAP such an excellent calculation engine.
Hope this helps
Keith Laker
Oracle Data Warehouse Product Management
OLAP Blog: http://oracleOLAP.blogspot.com/
OLAP Wiki: http://wiki.oracle.com/page/Oracle+OLAP+Option
DM Blog: http://oracledmt.blogspot.com/
OWB Blog : http://blogs.oracle.com/warehousebuilder/
OWB Wiki : http://wiki.oracle.com/page/Oracle+Warehouse+Builder
DW on OTN : http://www.oracle.com/technology/products/bi/db/11g/index.html

Error in distribution of model view

I created a modelview for distribution of CLFMAS types IDOCS from DEV to PRD.
Created ports,RFC destination etc.
I was able to generate partner profile in the sending system.When I try to distribute the model view in BD64,
I get this error . Initially, I thought it was because I did not have authorization for BD64 in PRD. Now that I have, I still get this error.. Any advice ?
Distribution of model view CHARS2PRD
Target system PRD100                      Communication error occurred
Process request without transaction. TID is empty.

I see the message did not post properly..THis is the message..
Distribution of model view CHARS2PRD
Target system PRD100                      Communication error occurred
Process request without transaction. TID is empty.

Model View Control

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