Is it there a property to arrange menu items horizontally AndEngine?
The default layout is vertical, do you know a way to set it horizontal?
There isn't a built it functionality that would arrange menu items horizontally, but check the MenuSceneAnimator class, especially getMenuItemX and getMenuItemY methods. It should be pretty easy to implement your own positioning that will suit your needs.
This is the solution I came up with, I know it can be optimized, but it works.
/**
* Sets menu items layout to horizontal
* #author Lucas Massuh
* #version 1.0
* #since 2015-05-28
* #return returns the "horizontalised" menu, just in case.
* #param menu This should be the menu scene containing all the Menu Items to be set horizontal
* #param padding This is the horizontal padding between each Menu Item
*/ private static MenuScene setMenuLayoutToHorizontal(MenuScene menu, int padding){
if (menu.getChildCount()<=1) return menu;
// Starts at 1 since child[0] position won't be changed
for(int i=1; i<menu.getChildCount();i++){
menu.getChildByIndex(i).setPosition(
//it can be optimized by pre-calculating item's width if they are all equal
menu.getChildByIndex(i-1).getX()+menu.getChildByIndex(i).getWidth()+padding,
menu.getChildByIndex(0).getY());
}
return menu;
}
Related
In Unity, I created a UI Scroll Rect Object. This object has two children, a Button Handler with different Buttons, and a Background.
Using it, both the Buttons and the Background are scrolling at the same speed. I want the Buttons to scroll faster than the Background, thus creating an effect of depth to the scrolling.
I can not find any options in the Objects or the Scroll Rect for this. Any ideas?
This will require a tiny bit of scripting. The best way in my opinion would involve following steps:
a) for each button, add a component that remembers its start position.
b) grab a scrollrect instance in parent
c) using it to grab an instance of ScrollBar
d) scrollbars have onValueChanged(float) callbacks, you can bind to, to know when the scroll position changes (to avoid doing checks in Update)
e) every time a scrollbar has moved (This will work regardless of whether the user used the scrollbar, or used another mean of scrolling, as the scrollrect will move the scrollbar, which will fire the event anyways), you get a callback with current scrollbar position which will be equal to normalized scrollrect position (0.1)
f) use that value to offset your localposition (something value*parallaxVector2), this should give you a nice cheap depth effect
Here's an example implementation
public class ScrolleRectDepthButton : MonoBehaviour
{
RectTransform content; // we'll grab it for size reference
RectTransform myRect;
public float parallaxAmount = 0.05f;
public Vector2 startPosition;
void Start()
{
myRect = GetComponent<RectTransform>();
startPosition = myRect.anchoredPosition;
ScrollRect scrollRect = GetComponentInParent<ScrollRect>();
content = scrollRect.content;
Scrollbar scrollbar = scrollRect.verticalScrollbar;
scrollbar.onValueChanged.AddListener(OnScrollbarMoved);
}
void OnScrollbarMoved(float f)
{
myRect.anchoredPosition = startPosition - (1 - f) * parallaxAmount * content.rect.height * Vector2.up;
}
}
I am using unity 2018.3.7. In my project I have instantiate 25 buttons in the scroll bar..I am scrolling the button. It is working well.
Actually i want freeze the 12 the button.When i scroll the button. The 12 th button should be constantly should be there and other button should scroll go up.
scrolling should be done but the freeze button should be constantly there.
Like Excel. If we freeze the top row. The top row is constantly there and scrolling is happened.
Like that i have to do in unity.
How to Freeze the button in scroll bar.
Edit:
Actually I have uploaded new gif file. In that gif file 2 row is freezed (Row Heading1,Row Heading2, Row Heading3,RowHeading4).
2nd row is constantly there. Rest of the the rows 4 to 100 rows are going up.
Like that i have to do ...
How can i do it..
Though your question still is very broad I guess I got now what you want. This will probably not be exactly the solution you want since your question is quite vague but it should give you a good idea and starting point for implementing it in the way you need it.
I can just assume Unity UI here is the setup I would use. Since it is quite complex I hope this image will help to understand
so what do we have here:
Canvas
has the RowController script attached. Here reference the row prefab and adjust how many rows shall be added
Panel is the only child of Canvas. I just used it as a wrapper for having a custom padding etc - it's optional
FixedRowPanel
Here we will add the fixed rows on runtime
Initially has a height of 0!
Uses anchore pivot Y = 1! This is later important for changing the height on runtime
Uses a Vertical Layout Group for automatically arranging added children
ScrollView - Your scrollview as you had it but
Uses streched layout to fill the entire Panel (except later the reduced space for the fixed rows)
Uses anchor pivot Y = 1! Again important for changing the height and position on runtime later
Viewport afaik it should already use streched anchors by default but not sure so make it
Content
Uses a Vertical Layout Group
Initially has a height of 0 (but I set this in the code anyway) and will grow and shrink accordingly when adding and removing rows
And finally RowPrefab
I didn't add its hierachy in detail but it should be clear. It has a Toggle and a Text as childs ;)
Has the Row script attached we use for storing and getting some infos
Now to the scripts - I tried to comment everything
The Row.cs is quite simple
public class Row : MonoBehaviour
{
// Reference these via the Inspector
public Toggle FixToggle;
public Text FixTogText;
public Text RowText;
public RectTransform RectTransform;
// Will be set by RowController when instantiating
public int RowIndex;
private void Awake()
{
if (!RectTransform) RectTransform = GetComponent<RectTransform>();
if (!FixToggle) FixToggle = GetComponentInChildren<Toggle>(true);
if (!FixTogText) FixTogText = FixToggle.GetComponentInChildren<Text>(true);
}
}
And here is the RowController.cs
public class RowController : MonoBehaviour
{
public Row RowPrefab;
public RectTransform ScrollView;
public RectTransform Content;
public RectTransform FixedRowParent;
public int HowManyRows = 24;
public List<Row> CurrentlyFixedRows = new List<Row>();
public List<Row> CurrentlyScrolledRows = new List<Row>();
// Start is called before the first frame update
private void Start()
{
// initially the content has height 0 since it has no children yet
Content.sizeDelta = new Vector2(Content.sizeDelta.x, 0);
for (var i = 0; i < HowManyRows; i++)
{
// Create new row instances and set their values
var row = Instantiate(RowPrefab, Content);
// store the according row index so we can later sort them on it
row.RowIndex = i;
row.RowText.text = $"Row Number {i + 1}";
// add a callback for the Toggle
row.FixToggle.onValueChanged.AddListener(s => HandleToggleChanged(row, s));
// increase the content's size to fit the children
// if you are using any offset/padding between them
// you will have to add it here as well
Content.sizeDelta += Vector2.up * row.RectTransform.rect.height;
// don't forget to add them to this list so we can easily access them
CurrentlyScrolledRows.Add(row);
}
}
// called every time a row is fixed or unfixed via the Toggle
private void HandleToggleChanged(Row row, bool newState)
{
if (newState)
{
// SET FIXED
// Update the button text
row.FixTogText.text = "Unfix";
// Move this row to the fixedRow panel
row.transform.SetParent(FixedRowParent);
// be default we assume we want the first position
var targetIndex = 0;
// if there are other fixed rows already find the first child of FixedRowParent that has a bigger value
if (CurrentlyFixedRows.Count > 0) targetIndex = CurrentlyFixedRows.FindIndex(r => r.RowIndex > row.RowIndex);
// handle case when no elements are found -> -1
// this means this row is the biggest and should be the last item
if (targetIndex < 0) targetIndex = CurrentlyFixedRows.Count;
// and finally in the hierachy move it to that position
row.transform.SetSiblingIndex(targetIndex);
// insert it to the fixed list and remove it from the scrolled list
CurrentlyFixedRows.Insert(targetIndex, row);
CurrentlyScrolledRows.Remove(row);
// Make the fixed Panel bigger about the height of one row
FixedRowParent.sizeDelta += Vector2.up * row.RectTransform.rect.height;
// Make both the scrollView and Content smaller about one row
Content.sizeDelta -= Vector2.up * row.RectTransform.rect.height;
ScrollView.sizeDelta -= Vector2.up * row.RectTransform.rect.height;
// Move the scrollView down about one row in order to make space for the fixed panel
ScrollView.anchoredPosition -= Vector2.up * row.RectTransform.rect.height;
}
else
{
// SET UNFIXED - Basically the same but the other way round
// Update the button text
row.FixTogText.text = "Set Fixed";
// Move this row back to the scrolled Content
row.transform.SetParent(Content);
// be default we assume we want the first position
var targetIndex = 0;
// if there are other scrolled rows already find the first child of Content that has a bigger value
if (CurrentlyScrolledRows.Count > 0) targetIndex = CurrentlyScrolledRows.FindIndex(r => r.RowIndex > row.RowIndex);
// handle case when no elements are found -> -1
// this means this row is the biggest and should be the last item
if (targetIndex < 0) targetIndex = CurrentlyScrolledRows.Count;
// and finally in the hierachy move it to that position
row.transform.SetSiblingIndex(targetIndex);
// insert it to the scrolled list
CurrentlyScrolledRows.Insert(targetIndex, row);
// and remove it from the fixed List
CurrentlyFixedRows.Remove(row);
// shrink the fixed Panel about ne row height
FixedRowParent.sizeDelta -= Vector2.up * row.RectTransform.rect.height;
// Increase both Content and Scrollview height by one row
Content.sizeDelta += Vector2.up * row.RectTransform.rect.height;
ScrollView.sizeDelta += Vector2.up * row.RectTransform.rect.height;
// Move scrollView up about one row height to fill the empty space
ScrollView.anchoredPosition += Vector2.up * row.RectTransform.rect.height;
}
}
}
Result:
As you can see I can now fix and unfix rows dynamically while keeping their correct order within both according panels.
What I'm trying to do:
I'm trying to render a game board for a user using a canvas. The user
will be able to zoom.
Rendering the entire game board is impossible when the user is
zoomed in as the game board is very large. Instead I will render what
is onscreen every 1/30 sec.
I would like to create the illusion of the entire game board beings
inside a gui like the ScrollPane where the user can scroll with a
mouse.
In reality the ScrollPane will be linked to a single canvas exactly
the size of the viewport.
I'm not sure what the right way to go about this is. The scroll pane does not seem to have a property that allows you to pretend it has a large object in it. I could place a large canvas in the scroll pane but large canvases take up memory, as my crashes have suggested. Should I be using an AnchorPane or something? What's the proper way to do this?
It seems like putting an AnchorPane into the ScrollPane, setting that AnchorPane to the correct size (the size of the entire gameboard) works well to let the user scroll freely. From there all you have to do is put a canvas in the AnchorPane at the right place and keep moving it (and redrawing it) makes everything work out. To make it run smoothly I think you should render 100 to 500 pixels outside of the viewport of the ScrollPane. Here's some example code from my project:
public class GridViewPane {
/** ScrollPane that this grid exits in */
private ScrollPane gridScroll;
/** The anchor pane immediately inside of {#link #gridScroll}. The
* dimensions of this equals the dimensions of the {#link #can} if it was to
* render the entire grid at once */
private Pane gridView;
/** Exists in {#link #gridView} and is exactly the size of the viewport of
* {#link #gridScroll} */
private Canvas can;
/** A label the specifies what hex is currently moused-over */
private Label currentHexLabel;
public void update() {
// sets the canvas to the right size if needed
final Bounds viewportSize = gridScroll.getBoundsInLocal();
if (can == null || !can.getBoundsInLocal().equals(viewportSize)) {
can = new Canvas(viewportSize.getWidth(),
viewportSize.getHeight());
gc = can.getGraphicsContext2D();
}
// sets the anchorpane to the right size
final double[] dim = getPixleSizeOfGrid(w.columns(), w.rows(), r);
if (gridView == null) {
gridView = new AnchorPane();
gridScroll.setContent(gridView);
}
Bounds oldDim = gridView.getBoundsInLocal();
if (!(oldDim.getWidth() == dim[0]
&& oldDim.getHeight() == dim[1])) {
gridView.setPrefSize(dim[0], dim[1]);
}
// puts the canvas in the right position
if (!gridView.getChildren().contains(can))
gridView.getChildren().add(can);
double[] x = getXScreenRange();
double[] y = getYScreenRange();
can.relocate(x[0], y[0]);
// *********** Drawing Hexes ***********/
}
}
I want to reposition the params docs, I had written the docs for my code earlier. Now I have rearranged the arguments of my method, I want the same to reflect in my docs written above my method. How can I do this, is there any shortcut keys? I don't want to do it manually. I have too many methods.
Earlier code and docs
/** Places the spinner on the screen on specified co-ordinates and customized drop down menu.It can be used for various option selection purpose.
* #param options The list of items the that is to be shown in the spinner's drop down menu.
* #param xCordinate The start point of the this view along x [To be given in cell number].
* #param yCordinate The start point of the this view along y [To be given in cell number].
* #param spinnerTextSize Text size of the text that is displayed on the spinner.
* #param spinnerTextColorCode The color of the text on the spinner,stored in database.[HTML color codes or Hex codes].
* #param spinnerWidth The width of the spinner.
* #param fontSize Text size of the text that is displayed on the spinner's drop down menu.
* #param fontColorCode The color of the text(stored in database) on the spinner's drop down menu.[HTML color codes or Hex codes].
* #param dropDownBackgroundColorCode The background color of the spinner's drop down menu,stored in database.[HTML color codes or Hex codes].
*/
public void spinner( int[] options, int xCoordinate, int yCoordinate, final float spinnerTextSize, int spinnerTextColorCode, int spinnerWidth, float fontSize, int fontColorCode, int dropDownBackgroundColorCode);
Repositioned arguments in the above method
public void spinner(int spinnerId, int xCordinate, int yCordinate, int spinnerWidth, final int spinnerTextSize, float fontSize, int spinnerTextColorCode, int fontColorCode, int dropDownBackgroundColorCode, int[] options)
You can do this using Eclipse's refactoring feature. Here is how:
Right-click on the method you want to change. Refactor -> Change Method Signature... or simply use Alt-Shift-C. In the menu that pops up you can change you method any way you want. In your case you will want to move parameters around. Select a parameter and use the Up and Down buttons to rearrange the list of parameters. This will also rearrange the documentation as long as the parameter names match up.
I would also like to issue some advice. You might want to look into the telescoping anti-pattern and the use of the Builder pattern to get around this pitfall.
I try to build a part of an eclipse pref page which contains a table and add/remove-buttons. I have found some example code but I don't understand the following thing:
The method
protected void adjustForNumColumns(int numColumns) {
((GridData)top.getLayoutData()).horizontalSpan = numColumns;
}
sets the horizontal span for the parent (top) composite to the number of columns.
And the method
protected void doFillIntoGrid(Composite parent, int numColumns) {
top = parent;
// set layout
GridData gd = new GridData(GridData.FILL_HORIZONTAL);
gd.horizontalSpan = numColumns;
top.setLayoutData(gd); ... }
sets the layout with the horizontal span set to the number of columns.
Which method is used when and why is the number of columns somehow applied twice to a grid data object? It might be a pretty stupid question but I just started with the whole thing... Can anybody explain to me how it works? (Or even refer to a nice webpage where I can find an explanation)
You might find this article on SWT layouts useful - http://www.eclipse.org/articles/article.php?file=Article-Understanding-Layouts/index.html