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.
Related
I am writing an UI test case, in which I need to perform an action, and then on the current page, scroll the only UITableView to the bottom to check if specific text shows up inside the last cell in the UITableView.
Right now the only way I can think of is to scroll it using app.tables.cells.element(boundBy: 0).swipeUp(), but if there are too many cells, it doesn't scroll all the way to the bottom. And the number of cells in the UITableView is not always the same, I cannot swipe up more than once because there might be only one cell in the table.
One way you could go about this is by getting the last cell from the tableView. Then, run a while loop that scrolls and checks to see if the cell isHittable between each scroll. Once it's determined that isHittable == true, the element can then be asserted against.
https://developer.apple.com/documentation/xctest/xcuielement/1500561-ishittable
It would look something like this (Swift answer):
In your XCTestCase file, write a query to identify the table. Then, a subsequent query to identify the last cell.
let tableView = app.descendants(matching: .table).firstMatch
guard let lastCell = tableView.cells.allElementsBoundByIndex.last else { return }
Use a while loop to determine whether or not the cell isHittable/is on screen. Note: isHittable relies on the cell's userInteractionEnabled property being set to true
//Add in a count, so that the loop can escape if it's scrolled too many times
let MAX_SCROLLS = 10
var count = 0
while lastCell.isHittable == false && count < MAX_SCROLLS {
apps.swipeUp()
count += 1
}
Check the cell's text using the label property, and compare it against the expected text.
//If there is only one label within the cell
let textInLastCell = lastCell.descendants(matching: .staticText).firstMatch
XCTAssertTrue(textInLastCell.label == "Expected Text" && textInLastCell.isHittable)
Blaines answer lead me to dig a little bit more into this topic and I found a different solution that worked for me:
func testTheTest() {
let app = XCUIApplication()
app.launch()
// Opens a menu in my app which contains the table view
app.buttons["openMenu"].tap()
// Get a handle for the tableView
let listpagetableviewTable = app.tables["myTableView"]
// Get a handle for the not yet existing cell by its content text
let cell = listpagetableviewTable.staticTexts["This text is from the cell"]
// Swipe down until it is visible
while !cell.exists {
app.swipeUp()
}
// Interact with it when visible
cell.tap()
}
One thing I had to do for this in order to work is set isAccessibilityElement to true and also assign accessibilityLabel as a String to the table view so it can be queried by it within the test code.
This might not be best practice but for what I could see in my test it works very well. I don't know how it would work when the cell has no text, one might be able to reference the cell(which is not really directly referenced here) by an image view or something else. It's obviously missing the counter from Blaines answer but I left it out for simplicity reasons.
My TableView is populated with data from a list of objects. The first column is a Boolean value.
Instead of displaying True or False in the cell, I would like to display an image if True and leave the cell empty if it's False.
This is how I populate the TableView:
colStarred.setCellValueFactory(new PropertyValueFactory<>("starred"));
colDate.setCellValueFactory(new PropertyValueFactory<>("date"));
colTime.setCellValueFactory(new PropertyValueFactory<>("time"));
I know that I need to use a custom TableCell and a CellValueFactory but I'm having a hard time wrapping my head around the documentation (I have not used Java factories in the past).
My research has lead to several answers regarding similar situations, but they all seem to deal with just displaying an image in the cell. I have been unable to find a solution for checking a boolean to determine whether an image should be displayed or not.
How do I check the starredProperty of my objects and show an image if it is True?
Thank you for all the help everyone has provided me in the past!
I'll assume the column to be a TableColumn<MyItemClass, Boolean>.
You simply create TableCells that adjust their look according to the item that gets passed to the updateItem method.
In this case we'll use a ImageView as graphic of the cell.
The following images are displayed depending on the item of the cell:
no image if the cell is empty or contains null
imageTrue if the item is true
imageFalse otherwise
You may of course use imageFalse = null for an empty cell when the item is false.
final Image imageTrue = ...
final Image imageFalse = ...
// set cellfactory
colStarred.setCellFactory(col -> new TableCell<MyItemClass, Boolean>() {
private final ImageView imageView = new ImageView();
{
// initialize ImageView + set as graphic
imageView.setFitWidth(20);
imageView.setFitHeight(20);
setGraphic(imageView);
}
#Override
protected void updateItem(Boolean item, boolean empty) {
if (empty || item == null) {
// no image for empty cells
imageView.setImage(null);
} else {
// set image for non-empty cell
imageView.setImage(item ? imageTrue : imageFalse);
}
}
});
What happens when the program is displayed is this:
The TableView creates cells needed to display the items using the cellfactories.
The TableView assigns the items to the cells. These items may be changed multiple times. Cells may also become empty after being filled. When this happens the updateItem methods of the TableCells are called.
I've got a simple example of an app here which I slapped together, and what I'm getting is pretty much what I'm after.
The issue is that when the view loads up, in the NSViewController's viewDidLoad, I set the tableView's selected index to 0 i.e. the first item (which works).
What I do notice is that when this happens, the selected row comes up as grey in color (i.e. as if it's not an active window/view)… It only seems to high light in the normal blue color when I physically click on the row that's selected.
I can confirm that the row is selected and everything appears fine.
Any ideas?
To confirm, the code I use to select the row is:
override func viewDidAppear() {
self.tableView.selectRowIndexes(NSIndexSet(index: 0), byExtendingSelection: false)
}
Here is what's happening with the actual view itself:
ABOVE: The darker grey line is the "selection bar". This is what happens as soon as the view becomes active.
ABOVE: Once I click on that row (the one which was once dark grey), I get he desired high lighting.. i.e. Navy Blue.
The reason why the cell is grey is because the table view doesn't have focus / isn't the first responder.
There are 3 states for tableView cell selection color
no selection = clear row background
selection and focus = blue row background
selection and no focus = grey row background
This is probably because another view has focus. Simply selecting a cell doesn't shift focus to a tableView. You need to call NSWindow.makeFirstResponder() to change the focus.
func tableViewSelectionDidChange(notification: NSNotification) {
let tableView = notification.object as! NSTableView
if tableView.selectedRow != -1 {
self.window!.makeFirstResponder(self.tableView)
}
}
I've managed to find out what's going on. (I think) and it seems to work.
I had to:
Subclass NSTableRowView
Add a new NSView just below the actual cell view (row) in Interface Builder
Set the new Row View's class to 'myNSTableViewSubClass'
Set the row view's Identifier to: NSTableViewRowViewKey (this is very specific, and that literally is the key, if this isn't set, it won't work be regarded as the Table Row View.
in the subclass I had to override the emphasised: Bool to always return yes e.g.:
override var emphasized: Bool{
get{
return true
}
set{
//You need to have the "set" there as it's a mutable prop
//It doesn't have to do untying though
}
}
And voila..
The catch in my case was in 4 above.
Is there any way i can hide HOT columns from javascript?
The requirement is such that the column to hide will come as a parameter in javascript and based on that the respective column will show hide accordingly.
The HOT has rowHeaders and colHeaders and the data with 20 columns.
Please advise.
OUTDATED SOLUTION
Ok I founnd a possible solution. I tested it out on my own system but it's actually quite simple.
You should be using a customRenderer in your columns option. Read up about this if you aren't already. The idea is that you're giving each cell its own renderer. In this custom function, you can do something like this:
var colsToHide = [3,4,6]; // hide the fourth, fifth, and seventh columns
function getCustomRenderer() {
return function(instance, td, row, col, prop, value, cellProperties) {
if (colsToHide.indexOf(col) > -1) {
td.hidden = true;
} else {
td.hidden = false;
}
}
}
What this renderer does is hide the cells that the var colsToHide specify. All you do now is add a DOM element that lets the user pick which and so every time the table gets rendered (which happens basically after any change, or manually triggered need be), the cells in the columns specified will be hidden, keeping the data array intact like you described. And when not in colsToHide they are re-rendered so make sure you get that working as well.
Here I implemented it with very basic functionality. Just enter the index of a column into the input fields and watch the magic happen.
http://jsfiddle.net/zekedroid/LkLkd405/2/
Better Solution: handsontable: hide some columns without changing data array/object
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.