C / C++ / MFC

Re: How to process the task bar mouse click event?

«_Superman_»22-Jan-13 18:44

«_Superman_»

22-Jan-13 18:44

What is it that you're trying to do?
If you want the alter the minimize and restore operations that happen when you click on the task bar button, handle the WM_SYSCOMMAND message and check for SC_MINIMIZE and SC_RESTORE in its wParam argument.
You then simply return 0 to prevent the default action from being performed.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++) (October 2009 - September 2013)

Polymorphism in C

Re: How to process the task bar mouse click event?

yu-jian23-Jan-13 2:11

yu-jian

23-Jan-13 2:11

I tryed it. But when click there is no message can be accepted in the mainframe.

how can draw a panel ?

VCProgrammer22-Jan-13 0:33

VCProgrammer

22-Jan-13 0:33

hi all,

i like the left side panel view of control panel in windows 7.

is this possible to use or draw this type of panel in dialog based application?

if yes please help me from where i can start for this?

thanks in advance.

Re: how can draw a panel ?

Richard MacCutchan22-Jan-13 3:07

Richard MacCutchan

22-Jan-13 3:07

It looks a bit like a List Box[^] whose individual items are SysLinks[^]

Re: how can draw a panel ?

VCProgrammer22-Jan-13 17:35

VCProgrammer

22-Jan-13 17:35

what about its glassy effect?

Re: how can draw a panel ?

Richard MacCutchan22-Jan-13 21:52

Richard MacCutchan

22-Jan-13 21:52

VCProgrammer wrote:
what about its glassy effect?

See https://www.google.co.uk/search?q=glass+effect+window+7&aq=f&oq=glass+effect+window+7&aqs=chrome.0.57j0l3j62l2.6084&sourceid=chrome&ie=UTF-8[^].

Re: how can draw a panel ?

VCProgrammer22-Jan-13 23:32

VCProgrammer

22-Jan-13 23:32

i already work with aero glass theme, and DWM (Desktop Window Manager)

Use DwmExtendFrameIntoClientArea and other function for aero glass theme and its works.

but this works only when aero theme and its drier properly istalled.

but the glassy look of list box with sys links (left panel) of the control panel looks glassy even aero theme is available or not.

so how can i draw this even aero theme is not available .

thanks.

Re: how can draw a panel ?

Richard MacCutchan23-Jan-13 1:00

Richard MacCutchan

23-Jan-13 1:00

VCProgrammer wrote:
so how can i draw this even aero theme is not available .

Sorry, I don't know about that one. Try searching the articles section to see if there are any suggestions there.

c++ implementation of a linked list.

neo2922-Jan-13 0:31

neo29

22-Jan-13 0:31

Pardon me!! I am new here. I am unable to use addNode function. When i declare Node* it doesnt compile.
I am trying to implement a linked list in c++ without
using structures and only use pure classes.I am rusty here. Any help would be great.
head->addNode() and head.addNode() doesnt work.

C++

#include<iostream>
#include<cstdlib>
using namespace std;
class Node
{
  int   data;
  Node* next;
public:
  Node()
 {
   data=0;
   next=NULL;
 }
 void addNode(int a)
{
   if(this!=NULL)
   {
     data=a;
     next=NULL;
   }
}
};
void main()
{
  Node* head;
        head.addNode(10);
}

Re: c++ implementation of a linked list.

Maximilien22-Jan-13 1:35

Maximilien

22-Jan-13 1:35

addNode is not a member of the Node class.

C++

class Node 
{
 public:
   void addNode(int a);
};
void Node::addNode( int a )
{
//...
}

your addNode is not good, you need to think things over; you do not allocate a new node; you do not assign the next pointer ...

I find that using free functions instead of class methods makes things easier when doing this; a node only contains the data (and the next pointer).

if all fails, use std::vector.

Good luck.

Nihil obstat

Re: c++ implementation of a linked list.

Sivaraman Dhamodharan22-Jan-13 2:42

Sivaraman Dhamodharan

22-Jan-13 2:42

C++

void main()
{
  Node* head;
        head.addNode(10);
}

Create the object in the heap first. You just declared a variable stating "I will hold address of Node object in a variable head". But, where does that object? When there is no object head-> will not work. Head.addNode() also wont work as the object is not in stack.

Correction:

C++

void main()
{
  Node* head = new Node();
        head->addNode(10);
}

Object will be created in heap.

or

C++

void main()
{
  Node head;
  head.addNode(10);
}

Object will allocated on stack

Programming Article

Having problem with catching WM_LBUTTONUP message in CScrollBar

Bee cute21-Jan-13 23:52

Bee cute

21-Jan-13 23:52

I try to change CScrollBar's interface (MySkinScrollbar is delivered MFC's CScrollBar).
I loaded image to draw over the windows's classic interface -> It's done.

But when I click on "UpArrow" button in ScrollBar. The windows's classic interface is drawn over my image.
I think I should catch WM_LBUTTONDOWN and WM_LBUTTONUP message to redraw (calling Invalidate()).
I'm success in catching WM_LBUTTONDOWN message.
But I can't catch WM_LBUTTONUP message.

Please help me to solve this problem!

You can search with key word "//Why don't show message ?????". Jump to my problem.
This is my project (use VS 2003):
Download Project

By the way, please tell me the way to reset default the Visual Studio 2003 (like has just installed)!

Thanks for all !!!!!

(I'm Vietnamese. So my English is not good. If I make some mistakes, please help me out.)

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

Richard MacCutchan21-Jan-13 23:57

Richard MacCutchan

21-Jan-13 23:57

You may want to look into the Custom draw[^] or Subclassing Controls[^] features of Windows controls.

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

Bee cute22-Jan-13 14:36

Bee cute

22-Jan-13 14:36

Richard MacCutchan wrote:
You may want to look into the Custom draw[^] or Subclassing Controls[^] features of Windows controls.

Would you show me the detail?
I use MFC to "remix" control. I don't use WINAPI.

Please help me!

My deadline is no longer !!!!! Frown | :(

Thanks for all !

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

_Flaviu22-Jan-13 20:55

_Flaviu

22-Jan-13 20:55

Weird, I have tested myself your application, and another one from [here], and WM_LBUTTONUP mapped does not function ... why do you need this handler ? Maybe you can slove your task in another way ...

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

Bee cute23-Jan-13 15:57

Bee cute

23-Jan-13 15:57

Flaviu2 wrote:
why do you need this handler ? Maybe you can slove your task in another way ...

First, I thank you for replying !
I need WM_LBUTTONUP to solve my problem: When I click on "Up/Left Arrow Button" or "Down Arrow Button", my scroll bar's interface become a window classic interface.
I have a mini clip to explain my problem.

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

_Flaviu23-Jan-13 20:32

_Flaviu

23-Jan-13 20:32

I don't know if it's suitable for you, but why don't change the scrollbar style on left button down ? Smile | :)

It's just an ideea ...

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

Bee cute23-Jan-13 23:13

Bee cute

23-Jan-13 23:13

Flaviu2 wrote:
I don't know if it's suitable for you, but why don't change the scrollbar style on left button down ? It's just an ideea ...

Thanks for your great idea!

I solved this problem, other problem is appeared.
Could you tell how to "redraw the thumb" in my skin scroll bar (with ListBox) ?
I don't have a algorithm to solve Cry | :((

This is a mini clip to explain my trouble ! (The thumb isn't moved ????? )

Please help me!

Thanks for all!

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

Richard MacCutchan22-Jan-13 21:50

Richard MacCutchan

22-Jan-13 21:50

Bee cute wrote:
Would you show me the detail?

What detail? I have given you links to the two features you need to investigate for Win32 controls. You can follow up by checking the documentation for the MFC classes.

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

Bee cute23-Jan-13 16:00

Bee cute

23-Jan-13 16:00

Richard MacCutchan wrote:
What detail? I have given you links to the two features you need to investigate for Win32 controls. You can follow up by checking the documentation for the MFC classes.

I have visited your link but I understood a little. I am bad at Win32 (WinAPI). I only know MFC.

Thanks so much for your help! Smile | :)

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

Richard MacCutchan23-Jan-13 22:49

Richard MacCutchan

23-Jan-13 22:49

Bee cute wrote:
I only know MFC

You can still inherit from MFC classes and change their behaviour.

Re: Having problem with catching WM_LBUTTONUP message in CScrollBar

Bee cute23-Jan-13 23:16

Bee cute

23-Jan-13 23:16

Richard MacCutchan wrote:
You can still inherit from MFC classes and change their behaviour.

Thank you for your enthusiasm so much !

I solved this problem and I have other problem.
Could you tell how to "redraw the thumb" in my skin scroll bar (with ListBox) ?
I don't have a algorithm to solve Cry | :((