C / C++ / MFC Discussion Boards

Re: c graphics

Richard MacCutchan6-Apr-15 21:00

Richard MacCutchan

6-Apr-15 21:00

Do yourself a favour and study the documentation[^]. Google will find you some alternatives.

Re: c graphics

CPallini6-Apr-15 21:14

CPallini

6-Apr-15 21:14

The C programming language doesn't provide, by itself, functions for graphics. You have to use, in your application, the graphics API your system provides.

Re: c graphics

Stefan_Lang8-Apr-15 3:59

Stefan_Lang

8-Apr-15 3:59

As pointed out, C and C++ do not (yet) have built-in graphics capabilities. There are plenty of libraries for that purpose however, and plenty of articles offering advice on how to use them. What library to use strongly depends on the purpose you have in mind. I therfore suggest you feed the search engines of your choice with the keywords, "C", "Graphics programming" and maybe a keyword or two describing the application you have in mind.

GOTOs are a bit like wire coat hangers: they tend to breed in the darkness, such that where there once were few, eventually there are many, and the program's architecture collapses beneath them. (Fran Poretto)

I need to design a visual design tools for a private GUI library.

yu-jian6-Apr-15 6:38

yu-jian

6-Apr-15 6:38

Because it is difficult and wastes time for modifying the controls position in xml file directly.
Is anyone know how to design a good one as visual studio that cat drag and drop controls?

Re: I need to design a visual design tools for a private GUI library.

David Crow6-Apr-15 7:46

David Crow

6-Apr-15 7:46

yu-jian wrote:
Is anyone know how to design a good one as visual studio that cat drag and drop controls?

Yes, I'm sure someone out there has the ability.

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"You can easily judge the character of a man by how he treats those who can do nothing for him." - James D. Miles

Re: I need to design a visual design tools for a private GUI library.

Sascha Lefèvre6-Apr-15 8:22

Sascha Lefèvre

6-Apr-15 8:22

I just happened to google that a few days ago:

http://support.microsoft.com/en-us/kb/813808[^]
http://stackoverflow.com/questions/5486009/custom-form-designer-by-using-visual-c-sharp-net[^]
Form Designer[^]

I have no experience with that but judging from what I've seen and read so far, it's far from trivial.

IoleUndoManager with Excel application

jaafar tribak6-Apr-15 5:45

jaafar tribak

6-Apr-15 5:45

Hi all,
First of all, I would like to apologize for posting this question in the C++ forum as it deals with Classic VB (VBA) ... The reason I posted here is because I can't get an answer (not even a hint) in the VB/VBA foums ... I searched the web extensively but without any luck

I hope you guys can ,at least, point me in the right direction

Problem:

I am trying to control the Undo/Redo Stack in excel but I can't seem to get a pointer to the UndoManager Interface in the ppv out argument when calling the QueryService Method .. it always returns Nothing ..

I hope someone can tell me what I am doing wrong .. I think the "SID_SApplicationObject" is not the right SID for what I am trying to achieve

Note : I am using the olelib.tlb

Code :

Sub Test()
    Dim pUnk As olelib.IUnknown
    Dim IServiceProvider As olelib.IServiceProvider
    Dim IID_IServiceProvider  As olelib.UUID
    Dim IID_IOleUndoManager As olelib.UUID
    Dim SID_SApplicationObject As olelib.UUID
    Dim ppv As IUnknown
    CLSIDFromString IIDSTR_IServiceProvider, IID_IServiceProvider
    CLSIDFromString "{0C539790-12E4-11CF-B661-00AA004CD6D8}", SID_SApplicationObject
    Set pUnk = Excel.Application
    pUnk.QueryInterface IID_IServiceProvider, IServiceProvider
    IServiceProvider.QueryService SID_SApplicationObject, IID_IOleUndoManager, ppv 
End Sub

Any help will be much appreciated
Regards.

Re: IoleUndoManager with Excel application

David Crow6-Apr-15 7:50

David Crow

6-Apr-15 7:50

jaafar tribak wrote:
First of all, I would like to apologize for posting this question in the C++ forum as it deals with Classic VB (VBA) ... The reason I posted here is because I can't get an answer (not even a hint) in the VB/VBA foums ... I searched the web extensively but without any luck

I do not see where you've asked this question in the VB forum.

Re: IoleUndoManager with Excel application

jaafar tribak6-Apr-15 13:14

jaafar tribak

6-Apr-15 13:14

Hi,

I did ask similar questions in the VB and COM forums before and in other websites as well .. but these rather difficult questions often remain ignored or without a propper solution .. I thought VC programmers were more confortable with these type of in depth subjects.

The very few vb lines in the above code snippet should be easy to understand by non vb programmers .. I hope that anyone fmiliar with ole/com would hopefully be able to give me (at least) a rough hint

Regards.

CFileDialog gives error "C:Windows\system32\config\systemprofile\desktop refers to location not available........

N3KK5-Apr-15 21:06

N3KK

5-Apr-15 21:06

I am starting my application by a Service. Now When I want to save a
file, I tried using CFileDialog. but when ever I select "desktop" it
prompts a message as "C:Windows\system32\config\systemprofile\desktop"
refers to location that iss unavailable. It could be hard drive on this
computer, or on a network... "

I checked that "C:Windows\system32\config\systemprofile" is available
but there is not desktop directory inside it.

Re: CFileDialog gives error "C:Windows\system32\config\systemprofile\desktop refers to location not available........

Richard MacCutchan5-Apr-15 21:56

Richard MacCutchan

5-Apr-15 21:56

You already asked this at CFileDialog gives error "C:Windows\system32\config\systemprofile\desktop refers to location not available........[^]. Please do not crosspost. If you have additional infortmation then edit your original question.

Re: CFileDialog gives error "C:Windows\system32\config\systemprofile\desktop refers to location not available........

N3KK5-Apr-15 22:16

N3KK

5-Apr-15 22:16

Sorry I didnt knw abt this

Re: CFileDialog gives error "C:Windows\system32\config\systemprofile\desktop refers to location not available........

Richard MacCutchan5-Apr-15 22:35

Richard MacCutchan

5-Apr-15 22:35

Then you should read the FAQ[^] or http://www.codeproject.com/Messages/2922875/HOW-TO-ASK-A-QUESTION.aspx[^] before posting.

Got the solution for my problem...Re: CFileDialog gives error "C:Windows\system32\config\systemprofile\desktop refers to location not available........

N3KK12-Apr-15 20:07

N3KK

12-Apr-15 20:07

I got the solution for my problem... Smile | :)

CFileDialog gives error "C:Windows\system32\config\systemprofile\desktop refers to location not available........[^]

modified 14-Apr-15 1:43am.

MFC CDialog hosting WPF components

Member 88339813-Apr-15 1:40

Member 8833981

3-Apr-15 1:40

Hi,

I'm integrating some some WPF controls into a MFC dialog box.

One of the control is a media player that shows live video.
The second one is a label that shows the current video time.

What I need is to have is the label on top of the media player. The label should only display the time, so its background needs to be transparent.

Right now, I have the video player running fine inside the dialog box, but I am unable to have the time displayed as I wish. It just overlap the video player.

Both WPF components were creating by following instructions from this link.
https://msdn.microsoft.com/en-us/library/ms742522(v=vs.110).aspx#hosting_a_wpf_page[^]

I try to set the label with a transparent background.
timeLabel->Background = gcnew System::Windows::Media::SolidColorBrush (System::Windows::Media::Colors::Transparent);

But the label background is shown black.
I also try to set the Transparent flag of the MFC CDialog to true, but it didn't have any effect.

How can I that fixed?
Do I need to set up something special when I instantiate the WPF controls?
Do I need to call some functions from inside the MFC dialog box?

Thanks,

Alain Migeon

Re: MFC CDialog hosting WPF components

David Crow3-Apr-15 3:22

David Crow

3-Apr-15 3:22

Member 8833981 wrote:
I try to set the label with a transparent background.

timeLabel->Background = gcnew System::Windows::Media::SolidColorBrushSystem::Windows::Media::Colors::Transparent);

This looks like Managed code. Might try the other forum.

Re: MFC CDialog hosting WPF components

Member 88339813-Apr-15 4:36

Member 8833981

3-Apr-15 4:36

Thanks for suggestion.

I have just done so. But I'm not sure that the answer to my problem is inside the WPF part.
It can also be in the MFC one.

How to download a file from URL without using curl or libcurl ..in c++.?

mbatra311-Apr-15 23:42

mbatra31

1-Apr-15 23:42

Hi,

I want to download file from a given URL. I am using URLDownloadToFile() function for this purpose, but I am not getting the actual file. When I try to run the file, it throws an error.
As an example, If I download MSVS 2010 service pack 1 from Microsoft's website, the file size will be 795KB. But if I download using URLDownloadToFile() function passing the url and file name, downloaded file size will be 99 KB.

Is there any method to download an exe from a URL in C++.

Any help wll be appreciated.

Regards,
mbatra

Re: How to download a file from URL without using curl or libcurl ..in c++.?

Jochen Arndt2-Apr-15 0:17

Jochen Arndt

2-Apr-15 0:17

Which URL?

You must pass the complete URL to the file. When browsing MS for downloads, they are often provided by a confirmation page that will start the download. If you pass that URL, wou will download the web page content. On such pages you will usually find a link to the real file if the download does not start after some time.

Re: How to download a file from URL without using curl or libcurl ..in c++.?

mbatra316-Apr-15 21:44

mbatra31

6-Apr-15 21:44

Hi Jochen,

Thanks for your response. I got the code working. I was passing the link of the confirmation page, that was the issue.

Thanks..!!

Regards,

Re: How to download a file from URL without using curl or libcurl ..in c++.?

David Crow2-Apr-15 4:04

David Crow

2-Apr-15 4:04

mbatra31 wrote:
I want to download file from a given URL. I am using URLDownloadToFile() function...

How is it being used?

Implementing Finite State Machine using C++

Member 93502371-Apr-15 22:19

Member 9350237

1-Apr-15 22:19

Hi Guys!,

I've been trying to make a simple tracking game but I'm having trouble just setting up the basic game states. I'm hoping to use a finite state machine(FSM) to switch between screens but every article iv read about them is different and sometimes they leave out details, I couldn't understand it properly.

For example if I've two screens , Menu and Game screen. And in game I've to implement states for a simple tracking game. What would be a FSM look like to switch between them.??

Re: Implementing Finite State Machine using C++

David Crow2-Apr-15 4:09

David Crow

2-Apr-15 4:09

Member 9350237 wrote:
I'm hoping to use a finite state machine(FSM) to switch between screens...

What are the game's states? Inputs?

Re: Implementing Finite State Machine using C++

CPallini2-Apr-15 6:31

CPallini

2-Apr-15 6:31

Quote:
but every article iv read about them is different and sometimes they leave out details, I couldn't understand it properly.

They are different because FSM are widely used, for different purposes.
There are not may details to understand. A finite state machine is a rather simple stuff. You should understand your scenarion, though.
By wild guess, you could do something like (or go with a more OO approach)

C++

struct FSMData
{
  FSMState state;
  // other useful data
};

void update_fsm(FSMData & fsmd)
{
  switch(fsmd.state)
  {
  case STATE_MENU:
   handle_menu(fsmd);
   break;
  case STATE_GAME:
   handle_game(fsmd);
  //...
  }

void handle_menu(FSMData & fsmd)
{
  //...
  if ( userSelection() == PLAY_GAME)
  {
    // cleanup here
    fsmd.state = STATE_GAME;
    return;
  } 
  // ...
}

void handle_game(FSMData & fsmd)
{
  // ...
  if (userInput() == QUIT_GAME)
  {
    // cleanup here
    fsmd.state = STATE_MENU;
    return;
  }
  // ...
}

Message Closed

2-Apr-15 9:10

Member 9350237

2-Apr-15 9:10

Message Closed

modified 13-Apr-15 6:10am.

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