I am implementing drag and drop of button on windows application.During dragging I want to display some dragging effect. I think image of the button would be appropriate to display during dragging.
Also I think cursor should be changed during dragging.
My doubts are:
How to capture the image of button and display while dragging.
What type of cursor should be displayed during dragging.
Application is in C++, win32.
Drag image:
If it is a standard button control then you should be able to use WM_PRINT or WM_PRINTCLIENT to ask it to draw itself to a GDI HDC (i.e. into a bitmap that you then use as the drag-image).
Note that not all controls support those messages and some of them support them in slightly different ways. Sometimes you have to experiment a bit or have custom code-paths for different controls.
Another way is to draw the button yourself using the visual styles (themes) API, with a fallback on DrawFrameControl for when themes are disabled. But that is much more tedious than using WM_PRINT/WM_PRINTCLIENT if you don't need it.
Cursor:
Depends what the operation is doing, really. Note that you get the copy and move cursors for free with the shell drag object, if you want them. Sometimes it makes sense to use a custom cursor, though.
Related
I want to make my own scrollbars for a custom drawn plot, like this image, what would be the best way to go?
Scrollbars should:
Only be visible when mouse hover over it (with fade in/out)
Be a part of the x/y axis of the plot, like in the picture
Not have any arrow buttons, just the thumb Thinner than the normal scrollbars
Would you suggest to:
Create everything from scratch, handling paging, scrollwheel etc.
Try to inherit CScrollBar and do my own drawing?
From what I've read, it's not very easy to customize scrollbars in MFC, for example here)
First off, these have to be scrollbar (or other) controls, not window scrollbars (used for scrolling a window).
Second, the statement "it's not very easy to customize scrollbars in MFC", is only partially true. MFC is a "thin wrapper" of Windows API, so you should better refer to the documentation of the Windows scrollbar control.
Then there is the CScrollBar class, but took a short look, and indeed, it does not really offer anything more than the Windows scrollbar does. As for the sample in the link you posted is a new (custom) control (painting everything on its own), i.e. literally "from scratch", not inheriting anything from CScrollBar.
So, you have to look into the Windows scrollbar control, and what it offers. Did take a look, and saw few things. Unfortunately there seems to be no owner-draw functionality. You can process the WM_CTLCOLORSCROLLBAR message, but this only allows you to change colors.
And according to the documentation the background color only. This appears to be the only possible customization, apart from the SBM_ENABLE_ARROWS message, which can hide the arrows. And no fading effect. If these are enough to you, you could try the Windows/MFC scrollbar, otherwise try writing your own.
I am trying to create a Direct3D app that is operating in windowed mode with a title bar and minimize/quit button. However, I'd really like to be able to axe the border around the window.
I am looking to do this because it looks pretty cheesy on dual monitors when the app is filling the primary monitor horizontally (with room to move the app vertically), but its window border overflows onto the secondary screen. I've tried a bunch of combinations of setwindowlong with GWL_STYLE and GWL_EXSTYLE, but can't seem to make headway unless I disable the title bar.
I've seen a bunch of apps that are borderless however they seem to emulate the title bar rather than using the built in one provided by Microsoft.
Thanks for any suggestions.
You can't remove the border and keep the titlebar AFAIK.
You can reimplement the titlebar by using WM_NCHITTEST but you still need to draw it yourself which would not be a bad idea if you want your D3D app to look its best.
Visual Studio, last time I checked, achieves its border with transparent layered windows standing behind the primary one. They are the shadows you see.
When a ListView item is selected, its color changes to indicate that it is selected. Now what I want to do is to disable this visual effect and implement my own, so for example I want when an item is selected to draw a rectangle around the item.
How can I do that? (Note that I am talking about the Icon view).
This is a case for custom drawing of controls.
It's all about handling the NM_CUSTOMDRAW notification and then to draw the control more or less by yourself.
I've never done it by myself changing the appearance seriously but I've change background colors of controls using this mechanism.
There is a lot of information about this on the internet...
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.
I have in my editor few editing modes. I can choose specific mode using buttons that are placed on a toolbar. I want to indicate which mode is currently on. When I press appropriate button - I want to make the clicked button remain pushed. How do I do that in WinAPI? My toolbar uses bitmaps for icons if that's relevant.
There used to be a way to get something like the look and feel of a toolbar by using a normal check box with the BS_PUSHLIKE style set. But that got broken a bit with Windows XP because of mouse hover effects, so it's not widely used any more.
If you want to create your own toolbar, without the help of MFC, there is an MSDN article that covers the creation and management of a toolbar window (actually a dedicated window class as part of the Common Controls Library).