It's as simple as it looks
How to disable text field from user input or even displaying soft keyboard
I want it blurred and locked
$.textview.editable = false;
you can add also
$.textview.touchEnabled = false;
Related
I have custom renderer for an editor in xamarin forms. I have added long text in editor. When I open the screen it is showing at the end of text. But if I scroll up text n taps in-between the text then I can see cursor is set where I tapped. Now if I scroll it down then cursor is also moving down instead of steady at the position where I tapped before. So is there any solution for this that cursor should be there at which place user taps even if user scroll up or scroll down the text inside editor in xamarin forms Android?
if (e.OldElement == null)
{
var nativeEditText = (global::Android.Widget.EditText)Control;
nativeEditText.OverScrollMode = OverScrollMode.Always;
nativeEditText.ScrollBarStyle = ScrollbarStyles.InsideInset;
nativeEditText.VerticalScrollBarEnabled = true;
nativeEditText.SetOnTouchListener(new DroidTouchListener());
Control.VerticalScrollBarEnabled = true; Control.MovementMethod = ScrollingMovementMethod.Instance;
Control.ScrollBarStyle = Android.Views.ScrollbarStyles.InsideInset;
Android.Content.Res.TypedArray a = Control.Context.Theme.ObtainStyledAttributes(new int[0]);
InitializeScrollbars(a);
a.Recycle();
Control.SetSelection(Control.Length());
}
I Want to change the foreground and background color of some specific cells dynamically, depending to another cell values or events.
For example, when The user clicks the cell, Its back color should be RED.
My code is This:
Janus.Windows.GridEX.GridEXFormatStyle style1 = new GridEX.FormatStyle();
style1.ForeColor = Color.Red;
mySpecificCell.FormatStyle = style1;
It works, but when I scroll down and then scroll up again, the color of cell returns to original color.
What is the problem with my code? How should I overcome this?
Like Arthur said, you have to utilize the FormattingRow event of the grid.
This is a sample code:
private void grd_FormattingRow(object sender, RowLoadEventArgs e)
{
if (e.Row.Cells["ColumnName"].Value == someValue) // a condition to determine when to change the color of the cell, you can put your own condition
e.Row.Cells["ColumnName"].FormatStyle = new GridEXFormatStyle() { BackColor = Color.Red };
}
The Formatting Row will fire for each row in the grid that is being displayed and you can access this row using e.Row
"ColumnName" is the name of the column.
You can replace the condition t ocheck when you want to change the color of the cell.
Try using the Gridex's formattingRow event to do your customized formatting.
This event is called for every row on the grid.
There you have access to the full row.
That means you could check the value of some cell and then format another cell based on the first.
I am relatively new to the Win32/Windows API (non-MFC), and am trying to change the text colour of a static text control. It is already drawn to the screen in black, but I want to change it to another colour using the Windows Colour Chooser dialog, which is opened on clicking a button. Is this possible?
For the button, the WM_COMMAND message is handled on clicking. So far, I have written:
CHOOSECOLOR ccColour;
ccColour.lStructSize = sizeof(ccColour);
ccColour.hwndOwner = hWnd;
ccColour.rgbResult = crLabelTextColour;
ccColour.Flags = CC_FULLOPEN | CC_RGBINIT;
if (ChooseColor(&ccColour) == TRUE)
{
// crLabelTextColour is a COLORREF global variable assigned on loading the program
crLabelTextColour = ccColour.rgbResult;
}
This code, however, fails with an unhandled exception at the if statement, and I'm not sure why! Other examples seem to write code like this.
ChooseColor() crashes because you are not initializing the CHOOSECOLOR structure completely. You are only setting 3 fields, the rest will contain garbage. You'll need to zero-initialize everything, simple to do:
CHOOSECOLOR ccColour = {0};
I am trying to create an animation to make it look like a button turns over and the back shows. So what I was trying to do is:
1- Show a button with BackgroundColor x. (The button now has a Width of null, the property ActualWidth does have a value.)
2- Create a double animation that changes the width of the button to zero.
DoubleAnimation widthAnimation = new DoubleAnimation();
widthAnimation.From = this.ActualWidth;
widthAnimation.To = 0;
widthAnimation.SpeedRatio = 3;
widthAnimation.Duration = TimeSpan.FromMilliseconds(800);
3- Change the BackgroundColor of the button.
ColorAnimation colorAnimation = new ColorAnimation();
colorAnimation.From = State ? _xColor : _yColor;
colorAnimation.To = State ? _yColor : _xColor;
colorAnimation.BeginTime = TimeSpan.FromMilliseconds(400);
colorAnimation.Duration = TimeSpan.Zero;
4- Change the width back to it's original value.
widthAnimation.AutoReverse = true;
The problem is when the animation runs twice the animation reads this.ActualWidth while animating, which causes it to fail to the original width. How can I solve this? I would like to set the Width back to null again, but it seems impossible to me.
You'd better use xaml style and template to "declare" what you want and let WPF/Silverlight take care of all.
If you try to do the same thing by code you can do it but you need to know what the framework does behind the scenes.
Basically you can set
- Style to define the values of some properties of the control
- DataTemplate to define the visual representation of the control's content
- ControlTemplate to define the appearance of the control
Each of those can have Triggers
- Property Triggers
to set properties or starts actions, such as an animation
when a property value changes or when an event is raised;
EventTriggers and Storyboards
to start a set of actions based on the occurrence of an event
If you like to learn about XAML Style and Template,
take a look at http://msdn.microsoft.com/en-us/library/ms745683.aspx
Spend a day to learn and save many hours (or days) of try and error and frustration!
To go right to the point, in your case I think you should use a Storyboard.
See http://msdn.microsoft.com/en-us/library/ms742868.aspx
where you can find also the code equivalent of XAML examples
I came to the idea to targetting the MaxWidth instead of the actual Width. I now use a KeyFrameCollection which sets the MaxWidth to int.MaxValue at the start (so also at the end when using autoreverse).
It will work fine untill there will be phones with a resolution bigger than the max int value.
The code:
DoubleAnimationUsingKeyFrames widthAnimation = new DoubleAnimationUsingKeyFrames();
widthAnimation.KeyFrames.Add(new DiscreteDoubleKeyFrame()
{
KeyTime = TimeSpan.Zero,
Value = int.MaxValue,
});
widthAnimation.KeyFrames.Add(new LinearDoubleKeyFrame()
{
KeyTime = TimeSpan.FromMilliseconds(1),
Value = ActualWidth,
});
widthAnimation.KeyFrames.Add(new LinearDoubleKeyFrame()
{
KeyTime = TimeSpan.FromMilliseconds(400),
Value = 0,
});
widthAnimation.Duration = TimeSpan.FromMilliseconds(400);
widthAnimation.AutoReverse = true;
I'm now facing the most common problem faced my many while working with listboxes. Though I found many answers the the forum, nothing seems to work for me or else i have got it wrong. .
I have created a listbox through code. Every listbox item has a stackpanel and within it two textblocks. the stackpanel has vertical orientation.The foreground of the textblocks have been set to specific colors. When an item has been selected or clicked it moves to another page and on the close of the new page it returns to the old page.
My problem is that, when a listbox item has been clicked, it does not show the selection color which is by default the phones accent color before moving to the next page. Is it because the color of the textblocks have already set while creating the listbox?
So i tried to set it the foreground of the selected item through the SelectionChanged() like this
ListBoxItem selItem = (ListBoxItem)(listboxNotes.ItemContainerGenerator.ContainerFromIndex(listboxNotes.SelectedIndex));
selItem .Foreground = (SolidColorBrush)Application.Current.Resources["PhoneAccentBrush"];
But this does not work, and i assume its cuz there is a stackpanel inside the item.
How exactly this needs to be done? Do i need to retrieve the textblocks inside the stackpanel and set the foreground?? I have not used binding here. Visual Tree Helper???
Thanks
Alfah
In general, the selected color doesn't change on lists where you're navigating.
From my experience with android, there's no 'selector' background on WP7. If you're looking for a cool UI effect that shows some action is happening, the TiltEffect is definitely recommended, and very easy to implement.
http://www.windowsphonegeek.com/articles/Silverlight-for-WP7-Toolkit-TiltEffect-in-depth
However - if you're creating an app that doesn't have immediate navigation, it is possible that you might want a 'selected' cell color / etc. I've attached an image:
https://skydrive.live.com/redir.aspx?cid=ef08824b672fb5d8&resid=EF08824B672FB5D8!366&parid=EF08824B672FB5D8!343
If you note here, the buttons are related to the selected item on the list - I.e. the user can perform 4 different actions based on the selected item, (but they must select an item first!).
internal void SelectionChanged()
{
var item = (((ListBoxItem) _view.servers.SelectedItem).Content) as StackPanel;
if (item != null)
{
for (int i = 0; i < _view.servers.Items.Count; i++)
{
var val = (((ListBoxItem) _view.servers.Items[i]).Content) as StackPanel;
var tb = val.Children[0] as TextBlock;
var tb2 = val.Children[1] as TextBlock;
if (i == _view.servers.SelectedIndex)
{
tb.Foreground = tb2.Foreground = (SolidColorBrush) App.Current.Resources["PhoneAccentBrush"];
}
else
{
tb.Foreground = tb2.Foreground = (SolidColorBrush) //regular color here, b/c all these should no longer be selected
}
}
}
}
The ListItemContainer will have it's Foreground changed automatically. To inherit this, simply don't specify a colour (or style) on your TextBlock.