[RESOLVED] about console size

the console have 2 types of size, right?
i belive that is the window size and the container size. the window size i can do it, but how can i change the container(i think that you call it buffer or something) size?

There are 2 sizes associated with a console. The size of the window and the size of the buffer. The buffer can be greater than the size of the window, but the window cannot be greater than the buffer. Basically you write to the buffer and the window displays that portion of the buffer over which it is placed.

To set buffer size, use SetConsoleScreenBufferSize(...)

To get buffer size, use something like

Code:

---

DWORD GetBufferSize(HANDLE sout, COORD& size)
{
CONSOLE_SCREEN_BUFFER_INFO        info;

        if (!GetConsoleScreenBufferInfo(sout, &info)) {
                return (GetLastError());
        }

        size.X = info.dwSize.X;
        size.Y = info.dwSize.Y;
        return (0);
}

---

To get windows size, you need something like this

Code:

---

DWORD GetConsoleSize(HANDLE sout, COORD& size)
{
CONSOLE_FONT_INFO        cfinfo;

COORD                fsize;

WINDOWINFO        winfo;

        if (!GetCurrentConsoleFont(sout, FALSE, &cfinfo)) {
                return (GetLastError());
        }

        fsize = GetConsoleFontSize(sout, cfinfo.nFont);
        if (!fsize.X && !fsize.Y) {
                return (GetLastError());
        }

        winfo.cbSize = sizeof(WINDOWINFO);
        if (!GetWindowInfo(GetConsoleWindow(), &winfo)) {
                return (GetLastError());
        }

        size.Y = (SHORT)((winfo.rcClient.bottom - winfo.rcClient.top) / fsize.Y);
        size.X = (SHORT)((winfo.rcClient.right - winfo.rcClient.left) / fsize.X);

        return (0);
}

---

To set window size use something like this

Code:

---

DWORD SetConSize(HANDLE sout, COORD size)
{
CONSOLE_SCREEN_BUFFER_INFO        info;

        if (!GetConsoleScreenBufferInfo(sout, &info)) {
                return (GetLastError());
        }
       
        info.srWindow.Top = 0;
        info.srWindow.Bottom = size.Y - 1;
        info.srWindow.Left = 0;
        info.srWindow.Right = size.X - 1;

        return (!SetConsoleWindowInfo(sout, TRUE, &info.srWindow) ? GetLastError() : 0);
}

---

Quote:

---

Originally Posted by 2kaud

There are 2 sizes associated with a console. The size of the window and the size of the buffer. The buffer can be greater than the size of the window, but the window cannot be greater than the buffer. Basically you write to the buffer and the window displays that portion of the buffer over which it is placed.

To set buffer size, use SetConsoleScreenBufferSize(...)

To get buffer size, use something like

Code:

---

DWORD GetBufferSize(HANDLE sout, COORD& size)
{
CONSOLE_SCREEN_BUFFER_INFO        info;

        if (!GetConsoleScreenBufferInfo(sout, &info)) {
                return (GetLastError());
        }

        size.X = info.dwSize.X;
        size.Y = info.dwSize.Y;
        return (0);
}

---

To get windows size, you need something like this

Code:

---

DWORD GetConsoleSize(HANDLE sout, COORD& size)
{
CONSOLE_FONT_INFO        cfinfo;

COORD                fsize;

WINDOWINFO        winfo;

        if (!GetCurrentConsoleFont(sout, FALSE, &cfinfo)) {
                return (GetLastError());
        }

        fsize = GetConsoleFontSize(sout, cfinfo.nFont);
        if (!fsize.X && !fsize.Y) {
                return (GetLastError());
        }

        winfo.cbSize = sizeof(WINDOWINFO);
        if (!GetWindowInfo(GetConsoleWindow(), &winfo)) {
                return (GetLastError());
        }

        size.Y = (SHORT)((winfo.rcClient.bottom - winfo.rcClient.top) / fsize.Y);
        size.X = (SHORT)((winfo.rcClient.right - winfo.rcClient.left) / fsize.X);

        return (0);
}

---

To set window size use something like this

Code:

---

DWORD SetConSize(HANDLE sout, COORD size)
{
CONSOLE_SCREEN_BUFFER_INFO        info;

        if (!GetConsoleScreenBufferInfo(sout, &info)) {
                return (GetLastError());
        }
       
        info.srWindow.Top = 0;
        info.srWindow.Bottom = size.Y - 1;
        info.srWindow.Left = 0;
        info.srWindow.Right = size.X - 1;

        return (!SetConsoleWindowInfo(sout, TRUE, &info.srWindow) ? GetLastError() : 0);
}

---

---

i have 1 question:
"The buffer can be greater than the size of the window, but the window cannot be greater than the buffer."
is that why the vertical scrollbar is showed?

Quote:

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Originally Posted by Cambalinho

i have 1 question:
"The buffer can be greater than the size of the window, but the window cannot be greater than the buffer."
is that why the vertical scrollbar is showed?

---

Yes, the window just shows a part of the buffer if the size of the buffer is greater than the size of the window. Depending upon how the sizes of the buffer and window have been set, you can get a horizontal scrollbar as well. If you don't want scroll bars then set the window size and the buffer size to be the same.

Note when setting buffer sizes that the rules apply! You cannot set a window greater than the buffer size and then set the buffer! The buffer needs to be set first and then the window size. Also if you are reducing the buffer size to be less than the current window size, then reduce the window size first and then the buffer size.

why the scrollbar isn't hided?

Code:

---

CONSOLE_SCREEN_BUFFER_INFO        info;
                RECT WindowRect;
                GetWindowRect(ConsoleHandle,&WindowRect);
                info.srWindow.Top =WindowRect.top;
                info.srWindow.Left= WindowRect.left;
                info.srWindow.Bottom = WindowRect.bottom;
                info.srWindow.Right = WindowRect.right ;
                SetConsoleWindowInfo(ConsoleDC, TRUE, &info.srWindow);

---

seems that these code is ignored:(

What does this GetWindowRect return? TRUE or FALSE?
The same question - about GetWindowRect.

Quote:

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Originally Posted by VictorN

What does this GetWindowRect return? TRUE or FALSE?
The same question - about GetWindowRect.

---

the GetWindowRect() gives 1(true), the SetConsoleWindowInfo() gives me 0(false)

Quote:

---

Originally Posted by Cambalinho

why the scrollbar isn't hided?

Code:

---

CONSOLE_SCREEN_BUFFER_INFO        info;
                RECT WindowRect;
                GetWindowRect(ConsoleHandle,&WindowRect);
                info.srWindow.Top =WindowRect.top;
                info.srWindow.Left= WindowRect.left;
                info.srWindow.Bottom = WindowRect.bottom;
                info.srWindow.Right = WindowRect.right ;
                SetConsoleWindowInfo(ConsoleDC, TRUE, &info.srWindow);

---

seems that these code is ignored:(

---

What are you trying to accomplish? You're getting the size of the console window then you try to set the size and position of the console window to what it is already??:confused:

Quote:

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Originally Posted by 2kaud

What are you trying to accomplish? You're getting the size of the console window then you try to set the size and position of the console window to what it is already??:confused:

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buffer size = window size

Quote:

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Originally Posted by Cambalinho

buffer size = window size

---

Then using the functions from above,

Code:

---

COORD    consize;

GetConsoleSize(consoleDC, consize);
SetConsoleScreenBufferSize(consoleDC, consize);

---

Note you should test for errors.

Quote:

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Originally Posted by 2kaud

Then using the functions from above,

Code:

---

COORD    consize;

GetConsoleSize(consoleDC, consize);
SetConsoleScreenBufferSize(consoleDC, consize);

---

Note you should test for errors.

---

sorry i don't have GetConsoleSize() what dll or library is need?

Quote:

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Originally Posted by Cambalinho

the GetWindowRect() gives 1(true), the SetConsoleWindowInfo() gives me 0(false)

---

Then how about the call of GetLastError to obtain the extended error info?

sorry about that.. you shared. but if the windows and buffer sizes are the same, why the scrollbar stills there?

Quote:

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Originally Posted by VictorN

Then how about the call of GetLastError to obtain the extended error info?

---

number 6.

Quote:

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Originally Posted by Cambalinho

sorry i don't have GetConsoleSize() what dll or library is need?

---

I gave you the code for this in post #2.

Quote:

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Originally Posted by Cambalinho

number 6.

---

Then go to the Win32 Error Codes adn look for the code with "number 6". It is

Quote:

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ERROR_INVALID_HANDLE

The handle is invalid

---

Quote:

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Originally Posted by Cambalinho

number 6.

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error 6 means that the handle is invalid - ie your consoleDC value is not a handle to a console. How did you obtain it?

Quote:

---

Originally Posted by 2kaud

I gave you the code for this in post #2.

---

why they complicate so many in C++ with API functions:(
i get the same error:(
6. i don't know what means:(

Quote:

---

Originally Posted by 2kaud

error 6 means that the handle is invalid - ie your consoleDC value is not a handle to a console. How did you obtain it?

---

yes i mistake it lol
see the sub:

Code:

---

struct Window
        {
                HWND WindowHandle;
                HDC WindowDC;
        };

HWND ConsoleHandle;
        HDC ConsoleDC;
        Window b;

void GetConsoleHwnd(Window &console)
        {       
                #define MY_BUFSIZE 1024 // Buffer size for console window titles.
                HWND hwndFound;        // This is what is returned to the caller.
                char pszNewWindowTitle[MY_BUFSIZE]; // Contains fabricated
                                          // WindowTitle.
                char pszOldWindowTitle[MY_BUFSIZE]; // Contains original
                                          // WindowTitle.

                // Fetch current window title.
       
                GetConsoleTitle(pszOldWindowTitle, MY_BUFSIZE);

                // Format a "unique" NewWindowTitle.

                wsprintf(pszNewWindowTitle,"%d/%d",
            GetTickCount(),
            GetCurrentProcessId());

                // Change current window title.

                SetConsoleTitle(pszNewWindowTitle);

                // Ensure window title has been updated.

                Sleep(10);

                // Look for NewWindowTitle.

                hwndFound=FindWindow(NULL, pszNewWindowTitle);

                // Restore original window title.

                SetConsoleTitle(pszOldWindowTitle);
               
                console.WindowHandle =hwndFound;
                console.WindowDC =GetDC( hwndFound);
                ConsoleDC=console.WindowDC;
                ConsoleHandle=console.WindowHandle;
               
               
                COORD    consize;

GetConsoleSize(ConsoleHandle, consize);
SetConsoleScreenBufferSize(ConsoleHandle, consize);
                cout << GetLastError ();
               
        }

---

Quote:

---

Originally Posted by Cambalinho

why they complicate so many in C++ with API functions:(
i get the same error:(
6. i don't know what means:(

---

As explained, error 6 means that the value of the handle passed to the function SetConsoleWindowInfo as first parameter is not valid. As I asked before, how do you obtain this value? You have it named ConsoleDC but a console handle is nothing at all to do with a Device Context in the sense used in Windows gui programming!

The program below when run from a console will set the buffer to be the same size as the console window and will therefore remove the scroll bars.

Code:

---

#define WINVER 0x0501
#define _WIN32_WINNT WINVER

#include <windows.h>

DWORD GetConsoleSize(HANDLE sout, COORD& size)
{
CONSOLE_FONT_INFO        cfinfo;

COORD                fsize;

WINDOWINFO        winfo;

        if (!GetCurrentConsoleFont(sout, FALSE, &cfinfo)) {
                return (GetLastError());
        }

        fsize = GetConsoleFontSize(sout, cfinfo.nFont);
        if (!fsize.X && !fsize.Y) {
                return (GetLastError());
        }

        winfo.cbSize = sizeof(WINDOWINFO);
        if (!GetWindowInfo(GetConsoleWindow(), &winfo)) {
                return (GetLastError());
        }

        size.Y = (SHORT)((winfo.rcClient.bottom - winfo.rcClient.top) / fsize.Y);
        size.X = (SHORT)((winfo.rcClient.right - winfo.rcClient.left) / fsize.X);

        return (0);
}

int main()
{
HANDLE hcon = GetStdHandle(STD_OUTPUT_HANDLE);

COORD        csize;

        GetConsoleSize(hcon, csize);
        SetConsoleScreenBufferSize(hcon, csize);
        return 0;
}

---

Note you should always test for errors after calling a function! - omitted in main here for clarity

Quote:

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why they complicate so many in C++ with API functions

---

Windows/console programming is fairly complicated. That's why you need to learn how to do these things. You can't just sit down and write these kinds of programs 'on the hoof'! There are about 70 api functions alone just referring to console programming!

Code:

---

console.WindowHandle =hwndFound;
console.WindowDC =GetDC( hwndFound);
ConsoleDC=console.WindowDC;
ConsoleHandle=console.WindowHandle;
               
COORD    consize;

GetConsoleSize(ConsoleHandle, consize);
SetConsoleScreenBufferSize(ConsoleHandle, consize);

---

NO!! A console handle is not a window handle or a device context. DC is not used in console programming.

To get a handle to the console being used, use GetStdHandle as per my example.

Quote:

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Originally Posted by 2kaud

Code:

---

console.WindowHandle =hwndFound;
console.WindowDC =GetDC( hwndFound);
ConsoleDC=console.WindowDC;
ConsoleHandle=console.WindowHandle;
               
COORD    consize;

GetConsoleSize(ConsoleHandle, consize);
SetConsoleScreenBufferSize(ConsoleHandle, consize);

---

NO!! A console handle is not a window handle or a device context. DC is not used in console programming.

To get a handle to the console being used, use GetStdHandle as per my example.

---

if you don't use DC, you can't use graphics lol
i build a game in console heheheheh
what is the diference between HWND and HANDLE?

Quote:

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if you don't use DC, you can't use graphics lol
i build a game in console heheheheh

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Good luck! You don't normally do graphics (except character graphics) in a console window - thats why its called a console and is just text! If you want graphics, I suggest you create a normal windows program.

Quote:

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what is the diference between HWND and HANDLE?

---

In console terms, a lot! They are very different things. A HANDLE is a handle to either the input, output or error buffers whereas HWND is a handle to the console window itself. All the console api functions need a console handle (HANDLE) as opposed to a windows handle (HWND). To get console handles use GetStdHandle(...).

Quote:

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Originally Posted by Cambalinho

what is the diference between HWND and HANDLE?

---

Why don't you want to read MSDN about HWND and HANDLE?

Quote:

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Originally Posted by 2kaud

You don't do graphics (except character graphics) in a console window - thats why its called a console and is just text! If you want graphics, create a normal windows program.



In console terms, a lot! They are very different things. A HANDLE is a handle to either the input, output or error buffers whereas HWND is a handle to the console window itself. All the console api functions need a console handle (HANDLE) as opposed to a windows handle (HWND). To get console handles use GetStdHandle(...).

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why my class have hwnd and dc(and handle now)? for the programmer be free;)

Quote:

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Originally Posted by VictorN

Why don't you want to read MSDN about HWND and HANDLE?

---

i don't want be rude, but i don't like how they explain some things. ok.. my english is limited, but sometimes i don't understand what they said and very const aren't declared:(

sorry to both but i can't rate you again... thanks for all.. thanks

Code:

---

#define MY_BUFSIZE 1024 // Buffer size for console window titles.
HWND hwndFound;        // This is what is returned to the caller.
char pszNewWindowTitle[MY_BUFSIZE]; // Contains fabricated WindowTitle.
char pszOldWindowTitle[MY_BUFSIZE]; // Contains original WindowTitle.

        // Fetch current window title.
        GetConsoleTitle(pszOldWindowTitle, MY_BUFSIZE);

        // Format a "unique" NewWindowTitle.
        wsprintf(pszNewWindowTitle,"%d/%d", GetTickCount(), GetCurrentProcessId());

        // Change current window title.
        SetConsoleTitle(pszNewWindowTitle);

        // Ensure window title has been updated.
        Sleep(10);

        // Look for NewWindowTitle.
        hwndFound=FindWindow(NULL, pszNewWindowTitle);

        // Restore original window title.
        SetConsoleTitle(pszOldWindowTitle);

        console.WindowHandle =hwndFound;

---

Why go through all the above if all you want is the HWND of the console? Just use

Code:

---

console.WindowHandle = GetConsoleWindow();

---

Simples!:D

Quote:

---

Originally Posted by 2kaud

Code:

---

#define MY_BUFSIZE 1024 // Buffer size for console window titles.
HWND hwndFound;        // This is what is returned to the caller.
char pszNewWindowTitle[MY_BUFSIZE]; // Contains fabricated WindowTitle.
char pszOldWindowTitle[MY_BUFSIZE]; // Contains original WindowTitle.

        // Fetch current window title.
        GetConsoleTitle(pszOldWindowTitle, MY_BUFSIZE);

        // Format a "unique" NewWindowTitle.
        wsprintf(pszNewWindowTitle,"%d/%d", GetTickCount(), GetCurrentProcessId());

        // Change current window title.
        SetConsoleTitle(pszNewWindowTitle);

        // Ensure window title has been updated.
        Sleep(10);

        // Look for NewWindowTitle.
        hwndFound=FindWindow(NULL, pszNewWindowTitle);

        // Restore original window title.
        SetConsoleTitle(pszOldWindowTitle);

        console.WindowHandle =hwndFound;

---

Why go through all the above if all you want is the HWND of the console? Just use

Code:

---

console.WindowHandle = GetConsoleWindow();

---

Simples!:D

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lol thanks for that;)
are you portuguese?;)

Quote:

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are you portuguese?

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No - English. Simples is from a famous TV commercial featuring Meerkats!

http://www.google.co.uk/search?q=com...w=1244&bih=862

Quote:

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Originally Posted by 2kaud

No - English. Simples is from a famous TV commercial featuring Meerkats!

http://www.google.co.uk/search?q=com...w=1244&bih=862

---

lol;)

Quote:

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Originally Posted by Cambalinho

i don't want be rude, but i don't like how they explain some things. ok.. my english is limited, but sometimes i don't understand what they said and very const aren't declared:(

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You don't like the explanation or experience difficulties with understanding articles? In case of the latter, you may find more acceptable to get the ideas from books, Petzold's or Richter's, or other's.

Quote:

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Originally Posted by Igor Vartanov

You don't like the explanation or experience difficulties with understanding articles? In case of the latter, you may find more acceptable to get the ideas from books, Petzold's or Richter's, or other's.

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thanks;)