Visual C++ :: SDI CView Covered With Bitmap Resource?

Feb 10, 2013

I have an SDI / CView app (VS 2010). All works well until I minimize the app using the minimize button or drag it partially off of the screen. In the former instance, any attempt to restore the app results in an appcrash with a tight freeze up of the machine. In the later instance the same happens immediately.

In building the app, I scoured the web for code to accomplish the loading and display of the bitmap. After some experimentation I settled on overriding the OnPaint. Below is the code. Note that m_Map is a CBitmap member and IDB_BITMAP1 is a loaded bitmap resource.

Code:

void CMyDragViewView::OnPaint()
{
// CPaintDC dc(this); // device context for painting
// TODO: Add your message handler code here
// Do not call CView::OnPaint() for painting messages
// http://msgroups.net/microsoft.public.vc.mfc/loading-bitmaps-into-main-window/563285
int x = m_Map.LoadBitmap(IDB_BITMAP1);
TRACE1(" x = %d
", x);
CPaintDC* dc = new CPaintDC(this);

[code]....

I suspect that the problem is OnPaint trying to repaint the bitmap which requires reloading it, but I don't know how to work around this.

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Visual C++ :: How To Create Edit Box In CView

Dec 16, 2013

I'm trying to create an edit box in a CView.So far, this is how far I've gotten:

With this code

Code:
// .h
CEdit m_MyEditField;
// .c
m_MyEditField.Create(WS_CHILD | WS_VISIBLE,CRect(40,40,500,Y+55),this,0x1552);
m_MyEditField.SetWindowText("this is my CEdit field");

As you can see, the edit box doesn't look like the ones in a dialog, which is what I'm trying to accomplish.

Is there possibly some other class I should be using for the edit box?Or another setting for .Create?

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Visual C++ :: How To Get Pointer To CDialogBar From CView Class

Nov 22, 2013

My program (Test) is a basic MFC AppWizard (exe) created project. I have followed the steps in the link below to create a docked dialog box (myDialog) using VC++. [URL]...

The dialog box works, however, I have 2 issues that I am trying to resolve.

1) I have added a button to the Dialog box, however, when I run the application they start as disabled (note: the Disabled option on the Button Properties is unchecked). If I add function myDialog::OnButton to the myDialog class, the button remains disabled, however, if I add the function CTestView::OnButton to the View class, the button becomes active and works. How can I make the button work from the myDialog class?

2) I would like to be able to change an Edit box in the same dialog box when I click the button. How can I access the pointer to the myDialog from the View class?

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Visual C++ :: Passing A Variable From CView To CDocument?

Dec 12, 2012

I am attaching a sample project. Basically what this project does is that I initialize a variable map<CString, bool*> m_mapTest in CView::OnInitialUpdate and then pass the variable to CDocument class. On the other hand, within the function OnSaveDocument defined in CDocument I check m_mapTest. To my surprise, the CString part of m_mapTest is correct but the bool* part of m_mapTest is wrong(I pass an array of bool in CView::OnInitialUpdate).

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Visual C++ :: CTabView - CView HWND Is NULL

Feb 25, 2014

I'm using the Feature Pack CTabView, and I noticed that when the view is added using AddView with the following code CView's HWND is NULL when I try and access each of the CView1,CView2, etc.

Code:
int CMyTabView::OnCreate(LPCREATESTRUCT lpCreateStruct) {
if (CTabView::OnCreate(lpCreateStruct) == -1)
return -1;
AddView (RUNTIME_CLASS (CView1), _T("Simple"),100);
AddView (RUNTIME_CLASS (CView2), _T("Pair"),101);
AddView (RUNTIME_CLASS (CView3), _T("Data"),102);
return 0;
}

I think the user has to click the view's tab before the CTabView assigns an HWND. Is there a way to force CTabview to give each CView an HWND when the view is added?

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Visual C++ :: Frozen Grid In CView Of SDI Splitter

Sep 14, 2013

I have been working with both Chris Mander's MFC grid and the Ultimate Grid.

See for details:

The Ultimate Grid Beginner's Guide By The Ultimate Toolbox, 25 Aug 2007 : [URL] ....

MFC Grid control 2.27 By Chris Maunder, 6 May 2010 : [URL] ....

Both of these grid controls work nicely in a SDI CView windows. But when I create a split window using CSplitterWnd and the following code in an attempt to create a split window with a CListView and and a CView using this code:

Code:
// in CMainFrame.h
// Attributes
public:
CSplitterWnd m_wndSplitter;
//..
// in CMainFrame.cpp
//..
BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext)

[Code] .....

The grid in the CView window appears but is frozen in both instances. I suspect there is some notification necessary to for the grid to send and receive messages from the split CView window, but I cannot figure out how to implement this notification.

Unfortunately, even a demo application would be too large to append, but for anyone that is interested, the split method is encapsulated in the code I've presented here and the implementation of both grid controls is well explained in the links provided.

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Visual C++ :: Generating Dynamic Resource File?

Jan 3, 2014

We want to generate dynamic resource file for VC++ where the data will come from database (Oracle).

For an example, When a user log in the system, at that time if User is an English User, then some data in english language needs to be loaded in vc++ resource file. If the user is French then French data will be loaded into the resource file.

Right now all the data are hard-coded in the resource file but we want to load it dynamically from database, based on the login-user language.

How to do this dynamic implementation as I am not able to find any such concept in google.

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Visual C++ :: How To Call A Dialog From Win32 Resource DLL

Jan 16, 2013

How can I call a dialog , which is present in a seperate Win32 resource DLL .

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Visual C++ :: How To Call Dialog Window (formed As Resource) From DLL

Jan 19, 2013

Is there some document, that describe the sequence of actions, that result in displaying of a Dialog Window from a .DLL.

One important detail - the Dialog Window is created via resource/toolbox inteface.

Below is code from some example (which works), that displays simple window (with client area inside it).

In this code the window class is ctreated inside of application class.

Here is extract from application class:

Code:
class CMyWindow : public CFrameWnd {
CStatic* cs;
public:
CMyWindow();
};
CMyWindow::CMyWindow() {
Create(NULL, L"MyWindow", WS_VISIBLE, CRect(0,0,200,200));

[code].....

Where is my mistake ?

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Visual C++ :: Resource Editor Failed To Initialize ActiveX

Feb 27, 2014

I'm working on a project which consists of several ocx loaded by one exe. The platform is WinCE. Now I'm on a process to create a new ocx. I do have a copy of those ocx projects in Win32 platform. These Win32 versions were only used to register ocx in local system and then put those on to application dialog by 'Insert ActiveX'.

Now the problem is those Win32 projects are so outdated, and unable to build. Getting too many linking errors to be solved.

I have build the new ocx and link that with exe manually by editing .rc file and all. But still no luck. New ocx is getting registered in WinCE device but failing to start application.

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Visual C++ :: Resource View Takes Hangs When Trying To Edit Rc File

Mar 15, 2013

Found an online suggestion of using an rc2 file and cut and paste stuff from .rc file to .rc2 file to see which line causes the problem but don't know how to create a blank .rc2 file. Problem started after I ported from VC++ 6 to VS2010.

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Visual C++ :: Set Background Color For Controls And Dialog - Resource Exception

Jan 5, 2013

I used onctlcolor() method to set the background color for the controls & Dialog. I run my application, working good but after 15 mins the below error occured,

Application Error:

The Required Resource Was --------> Shown message box

Program Error:

First-chance exception at 0x7c81eb33 in XRay.exe: Microsoft C++ exception: CResourceException @ 0x001274f8.
First-chance exception at 0x7c81eb33 in XRay.exe: Microsoft C++ exception: CResourceException @ 0x001259d0.
First-chance exception at 0x7c81eb33 in XRay.exe: Microsoft C++ exception: CResourceException @ 0x00123ea8.
First-chance exception at 0x7c81eb33 in XRay.exe: Microsoft C++ exception: CResourceException @ 0x00122380.
First-chance exception at 0x7c81eb33 in XRay.exe: Microsoft C++ exception: CResourceException @ 0x00120858.
Warning: Uncaught exception in WindowProc (returning 0).

what is the reason for that? How can i prevent my project from this problem.

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Visual C++ :: Loading Bitmap In Particular Way?

May 25, 2013

I have a function that essentially takes a screen shot and saves a pointer to it as a structure. I would like to use the same structure for bitmaps that I load from files.

Code:
typedef struct _BITMAPCAPTURE {
HBITMAP hbm;
LPDWORD pixels;
INT width;
INT height;
} BITMAPCAPTURE;
BOOL CaptureScreen(BITMAPCAPTURE* bmpCapture) {

[code].....

The handle to the bitmap, as well as the width and height are all easy enough to get but I'm unsure of how to get the pixels.

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Visual C++ :: Use Bitmap On Button Instead Of Text

Dec 15, 2013

I'm trying to create a dialog where some of the buttons have pictures on them, rather than plain text. I notice that under the button's properties, under the "styles" tab there's a checkbox "bitmap". I can't seem to find any easy way of setting a bitmap.

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Visual C++ :: Slow Performances Using Bitmap / GDI

Apr 17, 2014

I am trying to do this:

while(1)
{
CaptureScreenshot (as BMP)
Convert screenshot to 24 bit instead of 32 bit
Resize screenshot size
Get the BMP bits array of the resized screenshot
}

I have it working but the best i could get is 18 iteration (screenshots) per second. This is what i do:

Code:
Start() {
ULONG_PTR gdiplusToken=0;
HDC mhCompatibleDC;
HBITMAP mhCompatibleBitmap;
HWND mhDesktopWnd;
HDC mhDesktopDC;
byte*piRGB=new byte[1200*900*3]

[Code] .....

Here i do things with piRGB but these things are not counted it the timer so you can assume here the code ends . As said as the code looks now, i can fill piRGB ~18 times (18loops) in 1 second. I must improve that...

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Visual C++ :: How To Save Bitmap To File

May 19, 2014

I have this code, where I capture window and make copy to bitmap of it. I am working on rotation of bitmap. But my problem is that when I save the image to file the result is just a black screen. It looks like there could be some problem either in GdipCreateBitmapFromHBITMAP() or GdipGetImageGraphicsContext()

How to fix it and to get the rotated image?

Code:
// CODE 81 and 82 de facto no difference
#defineCODE85 // 81
#defineWINDOW_MIN_HEIGHT200

[Code].....

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Visual C++ :: Drawing Text On A Bitmap?

Oct 5, 2012

I wrote a simple clock that shows the time over bitmap as follows:

Code:
void CMyClock::OnPaint()
{
CRect rect;
GetClientRect(&rect);

[Code]....

Now I got rid off the white border but everytime I draw a text it write on top of the previous text so after few seconds everything is a mess and the time is no longer readable.

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Visual C++ :: Draw Grid Over Bitmap In Scrollview

Jul 5, 2013

I have a CScrollView that displays a bitmap and I'm trying to draw a grid that I can turn off and on by check box and when the mouse is over a section of the grid that square highlights... I do all the drawing in the ondraw function... But when I have many grid squares it becomes slow to scroll and to highlight the square the mouse is over... I'm not sure the best way to go about this and where to place code to speed it up... The bitmap is only loaded once... But in ondraw the grid has to redraw every time scrolled and when mouse moved over a square.. In onmousemove I call invalidate so the square under mouse changes...

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Visual C++ :: Using 2D Array - Displaying Bitmap Image With Scrolling

Mar 11, 2014

My requirement is,

Read *.bmp image and displaying bitmap image with scrollbar in a MFC dialog application.

I was done using this

I was read the *.bmp image as a pixel data and stored by 2D Array,

Now i want to Display this 2D array as bitmap image with scrollbar separately in the same dialog. How can i display bitmap with scrollbar using 2D array?

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Visual C++ :: Bitmap Display From Buffer Received By TCP Socket

Feb 6, 2013

I want to display my image on window without saving it.

When data is received window size changes but there is no display on window.

My Code is:

Code:

int iBufferLength;
int iEnd;
int iSpaceRemaining;
int i;
iBufferLength = iSpaceRemaining = sizeof(chIncomingDataBuffer);
iEnd = 0;
iSpaceRemaining -= iEnd;

[code].....

where I'm doing wrong?

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Visual C++ :: Analyze Bitmap - Concept For Saving Data

May 18, 2014

I would like to create program which will analyse bitmap so would need good concept to save data. I am interested about the theory and I realize that i must to think this carefully because bad concept could create insufficient memory or inefficient program. Basically I want my program work with HSV or HSL model so I would need to convert the bitmap to HSL, but I am not sure if I should convert it first and then analyse all pixels or should I start to analyse the bitmap and make the conversion to HSL during it. But my main question is what method to choose to save the data in memory.

Even that I would start with very small, it should work also with bigger image like image having 1200 or even 4200 px on height. So the program should first analyse all columns of pixels in the image so for example 1200x800 px image has 1200 columns. So I would like to know if is it possible to create such object which would have such structure like this

Obj->basicColumnData->black->columns[name]->group

and in the place of columns should be placed data for every column. I would look for groups of pixels in the column, so in the result the column x could bear e.g. 500 groups of information and every group should contain the range of pixels e.g. group 1 should contain y value from 0 to 20, group 2 should contain value from 25-27 and so on. So I would create 1200 columns bear many of groups. This would be contained in "black" or "white" member to contain the data. This is just simplified idea, but the whole object should contain next data not just basicColumnData... So there should be another members bearing information calculated from the selected data.

So my question is what kind of method of saving data use for this? Should I use heap and dynamic allocated memory or should I create custom class, which will define every member, but these members will have to be dynamic memory? With the dynamic memory is there problem that there could be not enough memory to create such big object?

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C++ :: How To Calculate Total Surface Covered - Overlapping Squares

May 24, 2013

How would i calculate a surface that up to 10^5 squares cover. The info you get is xpos,ypos and width for each square.

How would you calculate the total surface covered (if any overlap only one counts).

Cannot use a big array of bools as the memory limit is 512 MiB.

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Visual C++ :: Line Graph Using Single Line Values From Bitmap

Feb 3, 2014

I was loaded a bmp file in my mfc window and stored rgb data in a file.My image size is 320x240.

Is possible to pick a single point (location) from that bmp image (Not the whole window)?

i like to plot a line graph using the pointed single line data using the stored file data?

here R is X Axis and G & B is Y Axis.

If i have 2D array of data means how can i plot the line graph?

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C++ :: Open Text File From Embedded Resource?

Apr 19, 2014

I have the following complete code in c++

Code:
void GetMapData () {
MapPair NewMap;
string TempString;
BOOL SkipReadLine = FALSE;
//------
char buffer[MAX_PATH];
std::fstream File;

[code].....

The problem is that I do not want to have an external MapData.txt, rather I access it through a embedded text resource, which in this case I have no knowledge on doing so.

I have the following snippet which demonstrates to my knowledge on how to access a text resource; however, I do not know hot to modify the code above to implant this, but to still have the same functionality as the original code above.

Code:
HRSRC hRes = FindResource(GetModuleHandle(NULL), MAKEINTRESOURCE(IDR_TEXT1), _T("TEXT"));
DWORD dwSize = SizeofResource(GetModuleHandle(NULL), hRes);
HGLOBAL hGlob = LoadResource(GetModuleHandle(NULL), hRes);
const BYTE* pData = reinterpret_cast<const BYTE*>(::LockResource(hGlob));

note that I am compiling with a MBCS.

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C Sharp :: How To Access Raw Image Data In Resource File

Nov 14, 2012

I have a .png file that my console app reads and puts into a structure that is saved as a file. The png is always the same so I thought I could just add it as a resource image to a resource file so it would be included in my program and not as a separate file. When I did that, the png shows up as a "SystemDrawingBitmap". If I examine this resource in a watch I see "Base" and "Static" members. Expanding those properties does not give me anything useful such as a pointer to the raw png data and its length in bytes.

If worse comes to worse, I can always make a hex dump of the png contents and then put the hex code into a CS file using static initialization.

Surely there is some way I can access the raw data internally and read the bytes into a byte array using C#

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C# :: Bitmap To Desktop?

Mar 24, 2014

I've been using code that takes a bitmap and then changes the color:

private void GetPixel(Bitmap ProcessedBitmap)
{
unsafe
{

[Code].....

Instead of using a Bitmap image (jpg, png, etc), I would like to use the desktop. I'm trying to scan my desktop for a pixel color using lockbits (GetPixel was way too slow.). I also do not wish to change the color of anything, I just want to loop until the pixel is found (with my getpixel method, I just put an if/then statement in the for loop). Something like:

if((CurrentPixel.R == 0xff) && (CurrentPixel.G == 0xff) && (CurrentPixel.B == 0xff)) Then
MsgBox("Pixel Found!")

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