Managed C++/CLI

9-Mar-11 20:08

The application has a screen size and resolution problem . What should be done since it looks very misery on desktops . Confused | :confused:

Richard MacCutchan9-Mar-11 22:21

9-Mar-11 22:21

How can anyone guess? Please try and explain your problem in more detail.

I must get a clever new signature for 2011.

John Schroedl10-Mar-11 3:31

10-Mar-11 3:31

We need more details to even begin discussing this.

Are you asking how to determine the screen resolution? Can there be multiple monitors?

If so, I'd start with the Screens object in WinForms. Ex: System::Windows::Forms::Screen::AllScreens

Of course, you can also fall-back to Win32 calls to enumerate monitors and determine resolution and work area size from there too.

John

fzerd10-Mar-11 4:26

10-Mar-11 4:26

Here are the requested details :

I have the code and following error (C++ /CLI)

<br />
Rectangle ^ClientResolution = gcnew Rectangle();<br />
<br />
ClientResolution = Screen::GetBounds();          <br />
<br />
float CurrentWidth = 1366 ;<br />
float CurrentHeight = 768;<br />
<br />
float RatioWidth = ((float)ClientResolution->Width / (float)CurrentWidth );<br />
<br />
float RatioHeight =((float)ClientResolution->Height / (float)CurrentHeight);<br />
<br />
	this->Scale(RatioWidth,RatioHeight); <br />

// error C2661: 'System::Windows::Forms:: Screen::GetBounds' : no overloaded function takes 0 arguments

John Schroedl10-Mar-11 5:17

10-Mar-11 5:17

There can be more than one monitor but if you only care about the primary monitor, try this:

Rectangle^ ClientResolution = Screen::PrimaryScreen->Bounds;

John

fzerd10-Mar-11 5:34

10-Mar-11 5:34

Thanks John also about the point which you indicated. Hovewer this time application's all windows are maximised which is actually not much preferable. I guess you already have a better idea to fix
the problem. Let me know please.

John Schroedl10-Mar-11 8:15

10-Mar-11 8:15

We still don't have enough info to guess the problem you're trying to solve.

Based on your code and follow-up here's what I think you are saying:

You have an application with maximized windows but they do not cover the entire desktop and you would like them to. What should you do to make them cover it? ie. you want a full-screen app.

OR possibly...

The application windows are maximized and hiding things and you want them scaled smaller?

OR

neither of these. Please add some more detail about what the current situation is and what the desired situation is.

John

Richard MacCutchan10-Mar-11 5:34

10-Mar-11 5:34

fzerd wrote:
System::Windows::Forms:: Screen::GetBounds' : no overloaded function takes 0 arguments

In which case why not check out the definition of the method you are calling here[^]?

I must get a clever new signature for 2011.

fzerd10-Mar-11 6:01

10-Mar-11 6:01

It's allright Screen::GetBounds(this->ClientRectangle)
Suprisingly it didn't work well. The width of the forms just became a little smaller.That's all.
The application still has a screen size or resolution problem. I am really confused.

Richard MacCutchan10-Mar-11 10:02

10-Mar-11 10:02

fzerd wrote:
The application still has a screen size or resolution problem. I am really confused.

Me too, as you have not made clear exactly what your problem is.

I must get a clever new signature for 2011.

fzerd12-Mar-11 1:51

12-Mar-11 1:51

Sorry i could't see the post. Of course , i am going to explain a simple version of my problem on an empty project. It is a C++ /cli desktop application.( .NET 3.5 )

On development machine (1280 by 720 pix) :
The application has two forms and a button.All form states are normal(default setting)I just customized to their sizes 100x150 and 150x100. That's all.

On client machine (1024 by 768 pix) :
A copy of the application's .exe was copied and clicked. It seems that initially all forms became maximized unexpectedly.

Any idea ?
Confused | :confused:

Richard MacCutchan12-Mar-11 2:34

Re: Load from String Table

12-Mar-11 2:34

fzerd wrote:
Any idea ?

Not really, I have not seen this problem. I can only suggest you check all your settings in your forms and start up code to ensure nothing is maximising the windows.

I must get a clever new signature for 2011.

Load from String Table

pix_programmer8-Mar-11 19:59

pix_programmer

8-Mar-11 19:59

Hi!
I've to get the string from the String Table. I used the following code:

wchar_t myDocs[1024];
::LoadString(NULL,IDS_USERNAME_CH,myDocs,1024);

It shows the following error:
error C2065: 'IDS_USERNAME_CH' : undeclared identifier

I've to read the string(with ID IDS_USERNAME_CH) from the string Table and set the Text to a label. How to do this in C++/CLI?

Richard MacCutchan8-Mar-11 21:45

std::string to System::String conversion

8-Mar-11 21:45

That message seems fairly clear, check where have you defined IDS_USERNAME_CH and make sure it is included in the module you are trying to compile.

I must get a clever new signature for 2011.

piul8-Mar-11 5:30

piul

8-Mar-11 5:30

Hi,

I have

System::String ^ St = gcnew System::String("Hey ho!");
//...
std::string str("standard");

St = str;  //This line won't work, but it's what I'd like to achieve

The only way I can make it work is by doing gcnew again St = gcnew System::String(str.c_str()); but I'm guessing this is not the right way. All the examples I have found tell how to do this when creating a new instance of System::String but none how to do it with an existing one.

Richard MacCutchan8-Mar-11 5:45

8-Mar-11 5:45

System::String() has no constructor that accepts a std::string Try this:

St = str->c_str();

I must get a clever new signature for 2011.

piul8-Mar-11 5:51

piul

8-Mar-11 5:51

Tried it, no good.

error C2664: 'void System::Windows::Forms::Control::Text::set(System::String ^)' : cannot convert parameter 1 from 'const char *' to 'System::String ^'	<br />

Richard MacCutchan8-Mar-11 7:14

8-Mar-11 7:14

Sorry, I guess there is no simple way to do this other than :

St = gcnew System::String(str.c_str());

I must get a clever new signature for 2011.

piul9-Mar-11 20:48

piul

9-Mar-11 20:48

Fair enough. That's what I'd done, but... am I not re-allocating memory without freeing it first?? (I have to do it for a dozen of strings!)

Richard MacCutchan9-Mar-11 21:55

9-Mar-11 21:55

piul wrote:
am I not re-allocating memory without freeing it first?

It depends on the actual structure of your code. I think a more pertinent question would be: why are you using both std::string and System::String when you only really need one of them, probably the latter. For example code such as:

std::string str("Some string");
System::String ^ st = gcnew(str.c_str());

serves no real purpose, in that the std::string is totally redundant.

I must get a clever new signature for 2011.

Displaying Chinese Characters

anti.AS10-Mar-11 23:02

anti.AS

10-Mar-11 23:02

what about

St = gcnew String(str);

using namespace System::Runtime::InteropServices;
...
...
St = Marshal::PtrToStringAnsi((IntPtr)str);

T.RATHA KRISHNAN7-Mar-11 1:33

T.RATHA KRISHNAN

7-Mar-11 1:33

Hi!
I've set the Text to my label from an XML file. I need to set a chinese word to a label. Here is my XML file contents:

 <?xml version="1.0" encoding="UTF-8" ?> 
<Remember>游戏目的是使两手牌的点数越比庄家接近</Remember>

The chinese word is for test purpose only(may not be meaningful word). Here is my code for reading this tag and setting the text to a label.

XmlDocument ^ Config = gcnew XmlDocument;

if(System::IO::File::Exists("Config.xml"))
{
    Config->Load("Config.xml");
}
XPathNavigator ^ nav = Config->CreateNavigator();
XPathNodeIterator ^ iter;
            iter = nav->Select("download/Remember");
while(iter->MoveNext())
{
    System::String ^ ConfigText = iter->Current->Value;
    ConfigText->Trim();
}
System::Runtime::InteropServices::Marshal::StringToHGlobalUni(ConfigText);
m_pRemember->Text = ConfigText;

While I execute the program only boxes are displayed in place of the chinese characters. If I open the XML file in a browser, the chinese characters are displayed. What else to do to display the chinese language?

Re: Displaying Chinese Characters

John Schroedl7-Mar-11 4:20