How do I make only the bottom of my vc++ windows form sizable and the rest of the sides (left, right, and top) not sizable?
I want the default arrow cursor to be displayed when moving around the 3 sides of my form (top side, left side, and right side) and the size NS arrow to be displayed and functional on the bottom of my form.
Thanks.
This requires falling back to handling the Windows notification directly, it isn't wrapped by the Form class. You'll need to override the WndProc() method and customize the handling of WM_NCHITTEST. Modify your stdafx.h file and add #include <windows.h> then add this code to your form:
protected:
virtual void WndProc(Message% m) override {
__super::WndProc(m);
if (m.Msg == WM_NCHITTEST) {
switch ((int)m.Result) {
case HTLEFT: case HTRIGHT: case HTTOP:
case HTTOPLEFT: case HTTOPRIGHT:
case HTBOTTOMLEFT: case HTBOTTOMRIGHT:
m.Result = (IntPtr)HTCLIENT;
}
}
}
Related
I created a tree view controls using WinApi. I want to capture mouse click on checkboxes. The notification message NM_CLICK contains NMHDR, which has no information about the node being clicked. since the clicked node may be different from the selected node, there should be a way to find which node has been checked or unchecked, It could be HTREEITEM, or lParam Inserted when adding items to tree view. I want to capture the checking/unchecking in real time. How can I specify which Node being checked/unchecked? any help or link appreciated.
mr.abzadeh
I want to capture the checking/unchecking in real time. How can I
specify which Node being checked/unchecked?
for this exist notification TVN_ITEMCHANGING and TVN_ITEMCHANGED - look for uStateNew and uStateOld members of NMTVITEMCHANGE - when tree view have checkboxes (TVS_CHECKBOXES style) it used as state image list with 2 images - unchecked and checked.
so state & TVIS_STATEIMAGEMASK will be 0 when no checkbox, INDEXTOSTATEIMAGEMASK(1) for unchecked and INDEXTOSTATEIMAGEMASK(2) for checked. based on this info we can and capture mouse click on checkboxes
by using TVN_ITEMCHANGING you can also prevent the change when you return TRUE for this notification. if you need only notify - use TVN_ITEMCHANGED
case WM_NOTIFY:
{
union {
LPARAM lp;
NMTVITEMCHANGE *pnm;
NMHDR* phdr;
};
lp = lParam;
switch (phdr->code)
{
case TVN_ITEMCHANGING:
{
UINT CheckStateOld = pnm->uStateOld & TVIS_STATEIMAGEMASK;
UINT CheckStateNew = pnm->uStateNew & TVIS_STATEIMAGEMASK;
if (CheckStateNew != CheckStateOld)
{
PCSTR szstate = "??";
switch (CheckStateNew)
{
case INDEXTOSTATEIMAGEMASK(1):
szstate = "uncheck";
break;
case INDEXTOSTATEIMAGEMASK(2):
szstate = "check";
break;
}
DbgPrint("%p>%s\n", pnm->lParam, szstate);
}
}
return FALSE;
}
}
also read How to Work With State Image Indexes
// Image 1 in the tree-view check box image list is the unchecked box.
// Image 2 is the checked box.
tvItem.state = INDEXTOSTATEIMAGEMASK((fCheck ? 2 : 1));
notification TVN_ITEMCHANGING and TVN_ITEMCHANGED is available begin from Windows Vista. if you need XP support too - on xp only option use #IInspectable solution
You can send a TVM_HITTEST message (or use the TreeView_HitTest macro) to find the tree view item, given a client-relative coordinate.
To get the cursor position at the time the NM_CLICK message was generated, use the GetMessagePos API.
This allows you do monitor any mouse click in the client area of the control. If you are interested in the state changes as the result of the standard tree view control implementation, you can handle the TVN_ITEMCHANGING or TVN_ITEMCHANGED notifications instead. Both supply an NMTVITEMCHANGE structure, where the hItem identifies the item being changed, and lParam carries application specific data.
You can set the autocapitalizationType property of a UITextField so all input is in upper case. I find that does work fine on the simulator (when actually tapping the simulator's keypad, not the Mac's keyboard), but not on the device? Everything stays lowercase.
In the UICatalog demo I added to the textFieldNormal method:
textFieldNormal.autocapitalizationType = UITextAutocapitalizationTypeAllCharacters;
Added a delegate too, to display the actual autocapitalizationType for the UITextField:
- (void)textFieldDidBeginEditing:(UITextField *)textField
{
NSLog( #"textField.autocapitalizationType=%d", textField.autocapitalizationType );
}
It will properly display 3 (=UITextAutocapitalizationTypeAllCharacters), but anything you tap remains lowercase. What am I missing?
Apparently this is a device general settings issue: Settings -> General -> Keyboard -> Auto-Capitalization must be ON to honour the setting of textField.autocapitalizationType to all upper case, else setting the property is ignored, apparently. If I switch it on everything works as expected.
You could try something like this the the textfield delegate:
-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string {
if (range.length == 0) { // not deleting , but adding a char
textField.text = [textField.text stringByAppendingString:[string uppercaseString]];
return NO;
}
return YES;
}
This works only if you try to insert a symbol at the end of the text.
Should you want to play with the text in the middle you could play with
range.location
and also you will need to play with the cursor positioning as it will go at the end every time...
I hope this helps someone.
I'm building an app where the first view has a menu panel, and I want this panel to stick around for the life of the app. The only places the user can "go" are reachable via buttons on this panel (a UICollectionView). In case it matters, this app is landscape-only, and iOS 6-only.
In order to make this work I created a custom segue, which removes everything from the view except for the menu panel, then adds the new view controller's view as a subview, sets the new view's frame to the bounds of the superview, and sends the new view to the back (so it's behind the menu panel). I call viewWill/DidDisappear from prepareForSegue, because otherwise they don't get called.
It may sound kludgy (it does to me), but it works fine except for one thing - the new view comes up from the bottom. It looks funny.
I then tried adding my own animation block - I initially locate the view off to the left, then animate it into place. I send it to the back in the completion block for the animation. This seems perfectly logical, and the frame values are all what they should be. But this one is worse - the view comes in from the lower left corner.
Can anyone suggest a way to make this work? Here's my current perform method:
- (void)perform {
MainMenuViewController *sourceVC = (MainMenuViewController *)self.sourceViewController;
UIViewController *destinationVC = (UIViewController *)self.destinationViewController;
for (UIView *subview in [sourceVC.mainView subviews]) {
// don't remove the menu panel or the tab
if (![subview isKindOfClass:[UICollectionView class]] && [subview.gestureRecognizers count] == 0) {
[subview removeFromSuperview];
}
}
[sourceVC.mainView addSubview:destinationVC.view];
CGRect finalFrame = sourceVC.mainView.bounds;
CGRect frame = finalFrame;
frame.origin.x = finalFrame.origin.x - finalFrame.size.width;
destinationVC.view.frame = frame;
[UIView animateWithDuration:0.5 animations:^{
destinationVC.view.frame = finalFrame;
} completion:^(BOOL finished) {
// make sure it ends up behind the main menu panel
[sourceVC.mainView sendSubviewToBack:destinationVC.view];
}];
}
It turned out to be a simple error - I needed to set destinationVC's frame before calling addSubview. Setting it afterwards was triggering the unwanted animation.
I use an instance of UITextField in which the text is normally aligned to the right, but switches to left alignment when being edited. This is done by calling setTextAlignment: on the editingDidBegin event. Since the update to iOS 6 this behaves strangely: The text alignment is changed correctly from right to left, but the cursor remains at the far right of the text field until some input is performed.
Does anybody know how to restore the expected behaviour so that the cursor moves as well when the alignment is changed?
To give some context: I use the text field to show a value with a unit. The unit is removed during editing and then displayed again after the user hits enter.
Method called on event editingDidBegin:
- (IBAction)textEditingDidBegin:(UITextField *)sender
{
[sender setTextAlignment:NSTextAlignmentLeft];
[sender setText:[NSString stringWithFormat:#"%.0f", width]];
}
Method called on event editingDidEnd:
- (IBAction)textEditingDidEnd:(id)sender
{
[sender setTextAlignment:UITextAlignmentRight];
[sender setText:[NSString stringWithFormat:#"%.0f m", width]];
}
Try resigning the textView as first responder, then make it first responder right after that.
textView.textAlignment = NSTextAlignmentCenter;
[textView resignFirstResponder];
[textView becomeFirstResponder];
-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
textField.textAlignment = NSTextAlignmentLeft ;
return YES ;
}
Change the textAlignment before editing did begin. The best place I know to do this is in the UITextFieldDelegate method textFieldShouldBeginEditing.
I have a winforms app with a main form (fMain) and two child forms (fLogin and fAdmin). fLogin is displayed using this code which is in a button click event handler for a button on the main form:
// show login form; pass the main form in as an argument
fLogin formLogin = new fLogin(this);
formLogin.StartPosition = FormStartPosition.CenterParent;
formLogin.ShowDialog(this);
In the constructor for fLogin, I assign the main form to a private member level variable.
// fLogin
fMain _mainForm;
// fLogin constructor
public fLogin(fMain mainForm)
{
InitializeComponent();
_mainForm = mainForm;
}
As you might imagine, fLogin is a small form with textboxes for a username and password and a couple of buttons. When my users enter their credentials and click the OK button, fLogin will validate the information with a server and if the information is good, fLogin will disappear and fAdmin will be displayed. Currently, I'm displaying fAdmin like this:
// hide formLogin right away
this.Hide()
// show admin form
fAdmin formAdmin = new fAdmin();
formAdmin.StartPosition = FormStartPosition.CenterParent;
formAdmin.Show(_mainForm); // pass main form as owner of admin form
// close formLogin
this.Close();
I can't set formAdmin.Parent = _mainForm and get the dialog to magically center itself. So I'm passing _mainForm to formAdmin.Show() as the owner of formAdmin but that doesn't seem to help with regard to getting formAdmin centered. Is there an easy way to cause formAdmin to be displayed at the center of the main form?
I think you need to restructure how you are doing this just a bit, instead of displaying fAdmin from within fLogin, close fLogin and then open fAdmin from fMain. If this doesn't work you can manually center if by calculating the point for the upper left corner of fAdmin and set this point as fAdmin's Location. I've had to do this in the past when I've encountered similar issues. To calculate the upper left corner for fAdmin so that it will be centered on fMain, use the following:
Point p = new Point(0, 0);
p.Y = (fMain.Height / 2) - (fAdmin.Height / 2);
p.X = (fMain.Width / 2) - (fAdmin.Width / 2);
fAdmin.Location = p;