I'm not big on creating GUI's, and generally my philosophy is: I don't create them, or I make them as simple as possible (and convince myself that it's better for usability :)
For my current project, I'm using Qt from Python (PyQt), and I want to start adding some GUI elements without cluttering the interface.
My idea is to create these elements as sort of floating-shaped-widgets that only appear when necessary; pretty much like the status bar (and find bar) in chrome.
Is there any standard api that enables creating this kind of interface?
This is not very complicated. If you want something like the status bar in Chrome you just need to have a QFrame at the bottom of your windows and show or hide it when you need it.
You have 2 options here, add is as part of your window layout so all the items move up when it is shown. Or you can have if floating, so it will be shown on top of the items. For the second option you need to create the QFrame with the window as parent and then in the window resizeEvent set the geometry of the frame.
This is an example of the second approach:
void MyWindow::resizeEvent(QResizeEvent* event)
{
frame.setGeometry(0, this->height() - frame.sizeHint().height(), this->width(), frame.sizeHint().height());
}
I hope this helps.
Related
I'm trying to handle background color properly in a dynamically generated property sheet in dynamically generated property pages in win32 api using MFC (though I expect my question is general, and not restricted to MFC, but since my code and examples use it, it's germane to my question anyway).
So we have a:
CPropertySheet
containing multiple
CPropertyPage
I generate the contents of any given page dynamically - from file resources using a custom dialog definition language - all irrelevant other than to say - a list of controls and their coordinates is created within a given page, and the page is resized to accommodate them. This logic is working beautifully.
However, what doesn't work is that the controls and background of each page draws using the dialog default color/brush.
I've tried a number of ways to attempt to force it to draw using the white color/brush that a hard-coded property sheet / page would.
There are two important pieces to this:
Page Background
Control (on the page) background
For #1, I've tried:
acquire the background brush from parent window class (it's dialog bkgrd) (same is true if I do this and ask the tab control)
change the property page to use WS_EX_TRANSPARENT (PreCreateWindow is not called by the framework when generating a page viz PropertySheet::AddPage)
For #2, I've tried:
overriding OnWndMsg / WM_CTLCOLORSTATIC to forward that request to (A) the parent (sheet), and (B) to the tab control (which is what wants the white in the first place).
However, anytime I use any of the above "ask for the background / forward the request" up the chain to either the sheet or the tab control - I get the dialog background color, never the white I'd expect.
Using Spy64, I can see that for a fully hardcoded property sheet / page - that the only discernable differences I can see is that the dialog window created in AddPage (or its moral equivalent) has WS_CHILD instead of mine which has WS_POPUP (the rest of the styles appear to be the same, such as WS_VISIBLE|DS_3DLOOK|DS_FIXEDSYS|DS_SETFONT|DS_CONTROL and WS_EX_CONTROLPARENT.
So, other than the WS_CHILD, I see no significant differences from what I'm creating and from another property sheet that works properly from a standard resource (i.e. hard coded).
I'm also flummoxed as to how this works normally anyway - since forwarding things like the ctrlcolor message doesn't respond correctly - and asking for the windows background colors similar doesn't - then how is it in a standard case the background colors of controls and pages comes out as white, and not dialog background?
Any ideas or help would be appreciated - I'm kind of running out of ideas...
When Visual Styles were added in Windows XP they really wanted to show off this new feature so they made the tab background a gradient (really a stretched image) instead of a single color and this caused problems in old applications that did custom drawing with the dialog brush as the background.
Because of this, only applications with a comctl32 v6 manifest got the new look but there was a problem; old propertysheet shell extensions would load in new applications (including Explorer) and things would look wrong.
To work around this they also require you (or your UI framework) to call EnableThemeDialogTexture(.., ETDT_ENABLETAB) to get the correct tab page look.
As if things are not tricky enough, there is a undocumented requirement that you also need a button or a static control on the page!
If you have custom controls they have to call DrawThemeParentBackground when you draw if they are partially transparent.
Turns out my old code had defined an ON_WM_ERASEBKGND handler - and removing that (and all of my above attempts) makes it work.
So simply doing NOTHING is the correct answer. D'oh!!!
I'm leaving my shame here in case someone else trips on this! [Whoops!]
(Still interested if anyone has deeper insight into how this mechanism works under the hood)
I need to implement a threaded view of sorts in an old VB6 app. It should look similar to this:
So, it's like a TreeView of sorts but there are buttons on the right (for each row) that could be pressed. The view does not need to collapse - it always stays in the expanded mode. The users should be able to respond to each node (via the comment button on the far right). And, of course, users should be able to scroll through the entries.
What are some of the ways I could implement this? I am open to 3rd party controls, paid or not.
VSFlexGrid has an outline mode. You can set the indent per row via the RowOutlineLevel property. It supports word wrap, images, etc within its cells/columns so you should be able to get pretty close to what you want. It also supports owner-drawn which lets you fully customize the cell painting (for example, to get those rounded corners).
I'm sure there are other controls out there as well...
I'm building an application to generate an array of colors based on a color chosen by the user.
The default on Mac OS X for color selection is to open a NSColorPanel containing multiple NSColorPickers. But, as the color selection process is the main interaction the user will have with the app, it'd be better to avoid the extra clicks and panel-popping in favor of a more straightforward way.
So, is there any way to add a NSColorPicker object to a window?
I know this is an older question, but check out NSColorWell. From the docs:
NSColorWell is an NSControl for selecting and displaying a single color value.
Interresting Question.
I strongly doubt it (but would love to be proven wrong). NSColorPickers are not NSControls (nor NSCells) so there's no clean wrapper to insert into a window.
Even if you were to instanciate an NSColorPanel and get a reference to its contentView and copy it (with all that defines the color picking controls) to your own window... there's no obvious way of obtaining the color value. NSColorPickers are plug-ins so you can't forsee the controls of a colorPicker.
The only other way I can see (and that's a stretch) would be to manually load the NSColorPickers plug-ins directly. I don't know how successfull this would be.
File a bug report and request the feature?
I am studying GUI programming an am doing fine for very simple GUI scripts, but since the opportunities to prototype a bit larger, more complete "real world" programs, I'm having some doubts.
Specifically, I don't know how should I handle navigation between screens. For example:
I create a window
I create the window's content (a panel widget with lots of widgets)
One of the widgets, when clicked, "takes to another screen"
This "other screen" is supposedly something that replaces the current window content. But what should the program actually do?
- Destroy the panel widget?
- Hide/remove the panel widget, but let it "live" in memory, offscreen?
Destroying the whole window and creatin another one is most probably NOT the way to do it.
Some form of navigation (backtrack) is something I plan to achieve.
The core of the question is: how is it USUALLY done, on most programs - what is the "usual", or "current" or "obvious" way to do it?
Thanks for reading, and sorry if the question is confuse and/or vague.
(note: I use PyGTK, but I'd like to think que question is toolkit-agnostic)
The first window is the parent window and the window on a click or navigation can be your child window.. you can have a grand child window, grand grand child window, etc.
You need not delete the parent window. The child windows can be drawn on top of it.
I'm using MFC (yes must be MFC and no I can't interop with .Net) to create a CFrameWnd.
My goal is to create a CFrameWnd containing a CFormView which is based on a Dialog Template that resembles something like:
I have got the frame and view to display, and I have an Edit control on there. Now what I want is to have a CToolbar aligned to the top of the Edit Text control but not docked to the top frame.
Ideally I would like to have a child frame/view that I can dynamically add in place of the Statement Group. That way I could just dock the toolbar as normal.
The thing that I find odd is that I could easily achieve this if I had a splitter in there by using the CreateView function. I really don't want to have a splitter and feel there ought to be another way.
In summary, these are the question I need help with:
Q1 - How can I have a CFrameWnd within a CView (like what CSplitter::CreateView does)?
Q2 - How can I position a toolbar within a CView without docking or floating it within another frame (I'm more than willing to resize, position it manually if only I knew how)?
Now I really appreciate how easy things are in .Net.
I wouldn't recommend sticking a CFrameWnd within a CView. You'll be fighting MFC all the way, basically living in a world of ASSERTs as the internal functionality such as message routing assumes that Frames don't live in views.
Instead just use a CWnd instead of the CFrameWnd and in the 'Create' method manually create the toolbar and the edit ctrl and size and position them yourself (create a AdjustLayout method that uses CMFCToolbar::CalcFixedLayout to adjust the position of your other components).
A great example of this is in the Visual Studio sample app PropertiesViewBar.cpp:
http://msdn.microsoft.com/en-us/library/bb983983(v=vs.90).aspx
Note: You might need to override OnCmdMsg to extend the message routing to the internal controls.