I am new in windows programming with MFC, so I have not much knowledge about API's. I want to create a tri-state check box with a tree control.
Can anybody give me suggestion that how to create it in a very simple way. Please help me.
Thank You
You Need to define your own image list with three Icons checked, unchecked, undetermined.
Add a recursive handler to calculate the states
Use SetItemState with INDEXTOSTATEIMAGEMASK and LVIS_STATEIMAGEMASK to set the appropriate undetermined value
Add your own handler when the user clicks on the state icon, so that you change the Icon state
Complete description and sample code here.
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I'm writing a GUI using QT for embedded system with linux. This device has no mouse. Only display and specific keyboard with keys: up, down, return and 7 number keys.
The software will be used to set some parameters of device and read them (some charts also).
Example of how menu could look:
after OPTION 1 selected
After SUBOPTION 1 selected some table with data is loaded.
Sometimes after selecting option i need to load specific widget and sometimes just another set of options.
I think it is possible to implement custom labels and kind of list widget that aligns them.
I guess it is also possible to use Qt's MVC classes for it. They are highly customizable, but i never made custom views and delegates.
Maybe i just need to create QtListView with stringlist model and apply stylesheet to it so it gets look more like buttons. And based on selection in list load next widget.
Which way is better and why?
Is there any easier ways to accomplish this?
Any ideas would be appreciated.
How can I sort Items in CListCtrl when the button is clicked?
I made a Dialog based application in MFC.
I put CListCtrl control on my Dialog and set its view style to report type.
I have two columns in this list view.
In here when I clicked the "Sorting" button, it should sort item in the list.
I saw many examples related to this, but none is working for me.
Can some one guide me how to do that?
I assume that you mean the column header when you write "sorting button".
You probably forgot to put this into the message map of your dialog:
ON_NOTIFY(LVN_COLUMNCLICK, IDC_LIST1, OnColumnclickList1)
IDC_LIST1 is the id of the list control which may be different in your code.
Are you somewhat familiar with MFC ? If not, you should follow one of the numerous tutorials available on the net.
I would use a CMFCListCtrl. It is easier, as it as built in sorting functionality and you only have to provide a function with the comparing items algorithm for sorting. I have succeeded using it. You have to override the OnCompareItems on your class derived from CMFCListCtrl. I also recommend you to do a call to EnableMarkSortedColumn(); after your list is created.
The CListCtrl has a SortItems method.
All you need to do is provide your Compare function to it as the parameter.
I don't know much about the contents of your list control so I can't really give you more information.
Please read up on it and extend your question with example code and details of which column needs to be sorted and I can help more.
If the contents of your cells are just text then I usually just return the value of:
return Value1.CollateNoCase(Value2);
There are also lots of tutorials on the Internet. For example:
http://www.codeproject.com/Articles/27774/CListCtrl-and-sorting-rows
In fact, that tutorial suggests us in SortItemsEx. That is what I would use.
I am trying to customize the default MFC RibbonBar. I need to reduce its height, change its color etc, but so far i haven't found anything on how to do so. I've been to msdn, and they just tell you how to add new controls on the ribbon.Can any one please point me in the right direction? Is this ribbon control even customize-able? i mean apart from adding categories and other controls on it, i want to change the look of the ribbon.
Some code samples about how to work with MFCRibbonControl would be of great help too.
This is similar BUT NOT THE SAME as C# questions, but as everyone knows, MFC is not .NET. MFC objects do NOT have the same runtime properties as .NET objects.
By using the Owner Draw mechanism (even though it's a simple text list), the callback has flags/attributes that shows which entry needs to be "highlighted", which we post a notification as to which item is currently "highlighted".
The complexity was MUCH less than trying to implement basic ComboBox functionality in a ComboBoxEx control (e.g. basic ComboBox styles do NOT apply to ComboBoxEx - don't ask).
I don't know if it would be of much help but....every time the highlighted item changes you receive a CB_GETCOMBOBOXINFO message.
I don't thik the information you receive with this message is going to help but if you really need to know the highlighted item maybe you could calculate it based on the mouse position and the height of every item. A bit tricky but possible.
I hope it helps.
I have a CListCtrl with checkboxes. I want to be able to disable one of the items so that the user cannot click the checkbox. Is this possible? If so, how?
Edit:
Found the specifics on how to hide a checkbox in another question
Need only some rows in a CListCtrl control to have check boxes
Shortly: Not easily possible.
You'll need to sub-class the CListCtrl and implement this behavior on your own or download for example the MFC Grid Control that allows you to do that.
As for the removing check-boxes idea, yes, that might be possible, MSDN:
Version 4.70. Enables check boxes for items in a list-view control. When
set to this style, the control creates
and sets a state image list with two
images using DrawFrameControl. State
image 1 is the unchecked box, and
state image 2 is the checked box.
Setting the state image to zero
removes the check box.