|
This would be a recursive type: "A function that returns a function that returns a function that ...". You can't do that!
The question now is what you want to achieve with that? To me that code looks rather obfuscated, making it error prone and hard to maintain. The sequence of function calls is encoded in the function implementations, rather in the implementation of the calling function. This is not only breaking the concept of encapsulation, it is also prone to mistakes causing endless loops, and later changes such as introducing more of these functions or changing the sequence will be very hard.
Why do you not simply write a sequence of function calls instead?
|
|
|
|
|
Thank you.
I have two types of app that should use this concept:
1.)A sort of scripting language that drives big image processing routines where the next result is only decided on the basis of execution. So these things are a sort of super high-level assembly language in which instructions do not have locations, but which perform a jump as part of every instruction.
2.)Breaking down really big scientific executions so that they may be executed in fragments witin OnIdle etc.....
|
|
|
|
|
I'd solve these cases like this:
1) Make an interpreter that analyzes the script and determines which function to call next.
2) Just split the execution into individual parts and call them sequentially. If the individual parts work or continue to work on a common context, make a struct to hold that context and pass a pointer to that as a parameter to each part-function.
In both cases there is no reason at all to encode the sequence of function calls right into the functions themselves. In fact, it would be bad to do so, for the very reasons pointed out above.
|
|
|
|
|
|
I use AlphaBlend blend the src( 0, 255, 0, 0 ) on dst( 128,128,128 ),expecting the result color should be the same as the dst( 128, 128, 128 ). But the result is ( 255, 128, 128 ). I have spent 5 hours try to find something, but unluckily I find nothing. it drives me crazy.
Could someon help me?
|
|
|
|
|
What are your BLENDFUNCTION values?
Mark Salsbery
Microsoft MVP - Visual C++
![Java | [Coffee]](https://codeproject.global.ssl.fastly.net/script/Forums/Images/coffee.gif)
|
|
|
|
|
BlendFunction.BlendOp = AC_SRC_OVER
.blendflag = 0
.SCA = 255
.AlphaFormat = AC_SRC_ALPHA
My bmp is per-pixel alpha channel bitmap.
I googled something articles and turuned out I didn't do the premultiple, but I am still comfused with the following formula:
Dst.Red = Src.Red + (1 - Src.Alpha) * Dst.Red
where the Src.alpha's value making sense should be 0.0 - 1.0, but it is 0 - 255. I wonder OS translate the alpha value in background for us?
|
|
|
|
|
how to change selection-background-color of a CRichEditCtrl?
Default selection-background-color is black, I did see some software have other selection-background-color on their CRichEditCtrl.
How to do it?
.
|
|
|
|
|
MFC doesn't have WM_SETFONT message handle, such as OnSetFont(...), how to add it as standard MFC handle?
I mean, not use WindowProc(...) etc.
.
|
|
|
|
|
Are you wanting to intercept the WM_SETFONT message? Do you have a custom control that has a WndProc() function?
"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
"Some people are making such thorough preparation for rainy days that they aren't enjoying today's sunshine." - William Feather
|
|
|
|
|
I think you can use ON_MESSAGE
0N_MESSAGE(WM_SETFONT, OnSetFont)...
where OnSetFont is declared as afx_msg LRESULT OnSetFont(WPARAM, LPARAM). and WPARAM contains HFONT.
http://www.mono-project.com/Main_Page
|
|
|
|
|
venkatmakam wrote: 0N_MESSAGE(WM_SETFONT, OnSetFont)...
While you probably meant ON_MESSAGE(), isn't that for user-defined messages and less-common Windows messages?
"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
"Some people are making such thorough preparation for rainy days that they aren't enjoying today's sunshine." - William Feather
|
|
|
|
|
you do ask a lot of questions, don't you?
Luc Pattyn [My Articles] Nil Volentibus Arduum
The quality and detail of your question reflects on the effectiveness of the help you are likely to get. Please use <PRE> tags for code snippets, they improve readability. CP Vanity has been updated to V2.3
|
|
|
|
|
Um, yeah.
"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
"Some people are making such thorough preparation for rainy days that they aren't enjoying today's sunshine." - William Feather
|
|
|
|
|
WM_SETFONT is a message sent TO a window (control). That's why it doesn't have a handler macro.
Mark Salsbery
Microsoft MVP - Visual C++
|
|
|
|
|
Hi
i am using a toolbar in a PropertyPage as part of a wizard
This works fine the first time, but if i access the wizard again, and that particular page then the toolbar fails to load
Can anyone help
im using the below code
if(!m_toolBar3.CreateEx(this, WS_CHILD | WS_VISIBLE | CBRS_TOP | CBRS_TOOLTIPS |CBRS_FLYBY | TBBS_BUTTON) || !m_toolBar3.LoadToolBar(IDR_TOOLBAR1))
AfxMessageBox("failed");
m_toolBar3.SetButtonInfo(m_toolBar3.CommandToIndex(ID_FILE_SAVE)+1,ID_SEPARATOR,TBBS_SEPARATOR,5);
m_toolBar3.SetButtonInfo(m_toolBar3.CommandToIndex(ID_EDIT_DELETE)+1,ID_SEPARATOR,TBBS_SEPARATOR,5);
m_toolBar3.SetButtonInfo(m_toolBar3.CommandToIndex(ID_EDIT_UNDO)+1,ID_SEPARATOR,TBBS_SEPARATOR,5);
m_toolBar3.SetButtonInfo(m_toolBar3.CommandToIndex(ID_APP_ABOUT)+1,ID_SEPARATOR,TBBS_SEPARATOR,5);
m_toolBar3.SetButtonInfo(m_toolBar3.CommandToIndex(ID_COLOUR)+1,ID_SEPARATOR,TBBS_SEPARATOR,5);
m_toolBar3.SetButtonStyle(m_toolBar3.CommandToIndex(ID_BOLD),TBBS_CHECKBOX);
m_toolBar3.SetButtonStyle(m_toolBar3.CommandToIndex(ID_UNDERLINE),TBBS_CHECKBOX);
m_toolBar3.SetButtonStyle(m_toolBar3.CommandToIndex(ID_ITALIC),TBBS_CHECKBOX);
m_toolBar3.SetButtonStyle(m_toolBar3.CommandToIndex(ID_PARAGRAPH_LEFT),TBBS_CHECKGROUP);
m_toolBar3.SetButtonStyle(m_toolBar3.CommandToIndex(ID_PARAGRAPH_CENTER),TBBS_CHECKGROUP);
m_toolBar3.SetButtonStyle(m_toolBar3.CommandToIndex(ID_PARAGRAPH_RIGHT),TBBS_CHECKGROUP);
m_toolBar3.SetButtonStyle(m_toolBar3.CommandToIndex(ID_PARAGRAPH_BULLETED),TBBS_CHECKBOX);
RepositionBars(AFX_IDW_CONTROLBAR_FIRST, AFX_IDW_CONTROLBAR_LAST,0);
m_toolBar3.MoveWindow( 18, 134,450, 30, 1 );
thanks
Simon
|
|
|
|
|
Hi:
first i invoke CreateRoundRectRgn(rc.left, rc.top, rc.right, rc.bottom, 5, 5) create a HRGN, then Invoke SetWindowRgn.
SetWindowRgn is successful But RoundRect(hdc, rc.left, rc.top, rc.right, rc.bottom, 5, 5) can not Draw round border,
I am surprised Because RoundRect Draw the top and left border, but not draw right and bottom border. Please Help me thanks.
the code as follow:
HRGN hRgn = CreateRoundRectRgn(rc.left, rc.top, rc.right, rc.bottom, 5, 5);
::SetWindowRgn(hwnd, hRgn, TRUE);
RoundRect(dcMem, rc.left, rc.top, rc.right, rc.bottom, 5, 5);
|
|
|
|
|
how you are calculating rc?
http://www.mono-project.com/Main_Page
|
|
|
|
|
calculate like this:
RECT rc;
GetWindowRect(hwnd,&rc);
OffsetRect(&rc,-rc.left,-rc.top);
|
|
|
|
|
thanks the problem is solved
|
|
|
|
|
|
And your question is....?
You talk about Being HUMAN. I have it in my name
AnsHUMAN
|
|
|
|
|
This is information based on a previous issue (also in Delphi forum) by OP.
The best things in life are not things.
|
|
|
|
|
Is this related to C/C++ in any way?
|
|
|
|
|
See above.
The best things in life are not things.
|
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
