I have a CScrollview window.I have added copy-to-Clipboard functionality with doubleclick. But user does not know if it is happening or not. So I want to add a message box but that automatically vanishes or blends, so that user doesn't have to click OK button or anything. But I don,t want to make the popup or the vanishing of it too abrupt. I have no idea how to do it. Can I draw a BMP/PNG image and increase its transparency or something like that?
Anyone please guide me to the way to achieve it.
Note: my application is for xp/win7.
From VS2008 SP1 upward take a look at the CMFCDesktopAlertWnd class (MSDN here)
Quoting from the Remarks section on MSDN (my emphasis)
A desktop alert window can be transparent, it can appear with animation effects, and it can disappear (after a specified delay or when the user dismisses it by clicking the close button).
Related
I have an MFC app that uses Rogue Wave's Stingray Studio Objective Grid to display a dialog with a grid in it. When doing a print preview, the grid uses the MFC print preview mechanism to generate the print preview dialog. On the dialog I see all the buttons you would expect, including next and previous, and zoom in and zoom out. I have more than one page worth of data in the grid and so I see a scroll bar on the right, the Next button is enabled and the previous button is disabled. If I click on the next button, the dialog advances the preview to the next page of the data, and I see the scroll bar move down accordingly, but the Prev button does not become enabled. I can use the scroll bar to scroll in both directions, but the 'Prev' button never becomes enabled and the Next button never disables when I reach the last page. I see a similar problem with the Zoom buttons. I can zoom in, but the zoom out button never enables so I can never zoom out anymore.
Has anyone seen this sort of behaviour before and know what causes it?
So it would seem that my problem boils down to the toolbar not getting messages to refresh itself. It should be getting a WM_IDLEUPDATECMDUI whenever the preview invalidates itself, but it is not. A sample app I found is working correctly and it does get those messages. What I believe is happening in my situation is that My code is in a DLL for an app which I do not control, and when the app catches messages, it swallows certain ones, including this one. I was able to resolve the issue with a kludge. I find the preview window and in the OnPrint virtual function I send the message to it's toolbar. This works quite well, but it is not very pretty.
I have a dialog box with a list box,slider and a button.
I tried to change the background color but I couldn't managed to change that, so i thought that if I add a "picture control" as a bitmap and put it in the background i will succed, but now the problem is that the "picture control" is on top of all the controls.
I tried to change the the tab control with Ctrl+d but it didn't change anything.
I also tried to use SetWindowPos to top or buttom but also it didn't change anything.
I noticed that if I click in the location of the button it's brought to the front as I want.
Is there any way to "click" all the controls at the begining? do i miss something in order to bring the control to the top?
If you need to change the background colour of the dialog box, you need to handle the WM_CTLCOLORDLG message and return the handle to a brush (if the brush is not a stock object, make sure you delete the brush after the dialog box is closed) -- or, you can process the WM_ERASEBKGND message and erase the background yourself.
I tried to change the the tab control with Ctrl+D but it didn't change anything. I also tried to use SetWindowPos to top or buttom but also it didn't change anything.
Ctrl+D does get you in reordering mode, however there is a more reliable way of checking. The dialog template is in text form in .RC file, where you can review the order of control with text editor and sort lines manually the way you wish. This will be the order of control creation and tab order as well. Sometimes it's even easier to reorder controls this way.
More to that, when your application is running, Spy++ SDK tool can enumerate windows and again it will give you window order for checking.
SetWindowPos with proper arguments changes Z-order of controls on runtime as well.
My application has a big graphics area with some controls (sliders, buttons, text edit controls) in a side panel. The graphics area understands some keyboard commands.
My problem is that when a control in the side panel is in focus, the main graphics area won't receive any keyboard commands, so this confuses the users. However, for some controls, this is intended, e.g. text edit controls.
What I want is the focus to automatically return to the graphics area at the earliest possible occasion (which I call "greedy" focus) -- e.g. when text editing is finished (Enter key), or when the user has selected an item from a combo box.
I am looking for a clean and robust strategy for dealing with the problem, either using Windows API or Borland Vcl.
I'd appreciate if you want to share your ideas.
I haven't fully solved the problem yet, but a very useful message to intercept on form level is CM_DIALOGKEY (Borland Vcl only). It gets sent for every key that is normally used for navigating within the UI. That is, cursor keys, tab and shift-tab, Enter and possibly others.
I've added an event handler for CM_DIALOGKEY that returns the focus to the graphics area and also forwards the key press to that component. This way the user can still control the UI elements via keyboard (important for text entry), but cursor keys are handled by the graphics area.
I know what you mean I had similar problem with some BIG apps lice CAD/CAM ...
My solution is simple, robust and I use it for years.
1.all keystrokes handling for that gfx area
must be done in events of the Form where the area is located
not in panels,paint box whatever...
2.create unfocus function (preferably member of form but it is not required)
this function will loose focus of any VCL item
so the focus goes to form itself which is what you want
I am using this:
//---------------------------------------------------------------------------
void main_unfocus()
{
Main->bt_unfocus->Visible=true;
Main->bt_unfocus->SetFocus();
Main->bt_unfocus->Visible=false;
}
//---------------------------------------------------------------------------
Main is the Form pointer
bt_unfocus is button (can be any focusable VCL component)
I place this button usually on the left upper corner of App and set its size to 2x2 pixels
it is invisible at start
the idea is to set focus to it (but first unhide it so no exception is thrown)
and then hide it so it loses focus
work well in BCB5 and BDS2006 (did not used it with any other IDE)
as you can see most of the time is this component invisible
4.now when to call main_unfocus ?
when you go with mouse from outside to inside of your gfx area (OnMouseMove event)
or when you click on it
also you can combine this with remembering if the focus is or not in gfx area
that can be done with events like OnExit ...
or when you hit Esc while focus is inside edit box ...\
I am sure you grasp the idea and adjust this to your needs
Hope it helps
How to disable and enable the window refresh when click on the top-left app icon?
For example, in window every .exe has a icon in its top-left sign, when we right click on that icon, some application stop refresh its window(For example, if the applicaiton has text-input, when you left-click on the top-left icon, the cursor in the text-input will stop blink), and for some other application, when you lef-click on the top-left icon, the application window will still refresh, how to enable or disable this?
Any code example is welcome, the question is urgent, please give your help.
Thanks a lost.
Wa
It's a standard menu behavior implemented with Windows. It's better not to override it as it's really painful. You can also put a a wait logic (using WaitForSingleObject) or Sleep for a while but that will make the application unresponsive.
If you can explain the purpose, we might be able to help you better.
I have an ATL application with a dialog containing a TAB control. The App uses a common controls manifest.
Under XP with visual styles, the tab control background is a different color than the dialog and the controls (mostly checkboxes), so it looks quite ugly.
Screenshot
How can I fix that?
There is - apparently - one thing to do to get tab control pages colored correctly using XP visual styles.
In the WM_INITDIALOG handler for each page, call the uxtheme API EnableThemeDialogTexture
With the ETDT_ENABLETAB flag this automatically changes the background color of the dialog and all its child controls to paint appropriately on a tab.
The dialog pages do not need any kind of transparent flag, or indeed any style bit set differently from previously. If you have overridden WM_ERASEBKGND or WM_CTLCOLORDLG in your pages DialogProc you will need to revert to default handling (return FALSE).
Here you could find answer to your question.
The check boxes will post WM_CTLCOLORBTN notifications to their parent. If, for the checkbox control IDs, the parent window's message handler returns the result of
GetStockObject(HOLLOW_BRUSH)
then the check boxes should be drawn with a transparent background, which should give you the look you want.