I have a database contains name's of images , I display the first image on imageView , I switched between images using ontouch up and down but that not usefull, I want to switch between images by moving finger right or left , any help please???
ivSaison.setOnTouchListener(new OnTouchListener() {
#Override public boolean onTouch(View v, MotionEvent event) {
switch (event.getAction())
{
// when user first touches the screen we get x and y coordinate
case MotionEvent.ACTION_DOWN:
{
x1 = event.getX();
y1 = event.getY();
break;
}
case MotionEvent.ACTION_UP:
{
x2 =event.getX();
//Si le glissement du doigt de gauche à droite
if (x1 < x2)
{
...........................
}
//Si le glissement du doigt de droite à gauche
else
{
...........................
}
...........................
break;
}
} return true;
} });
Related
Am using DispatchTouchEvent and need to detect a single tap, for that considered the down point and up point, when both are same, detected the single tap.
But this works fine in some android devices, but in some device, there in a pixel difference in down and up point. How to overcome this?
public override bool DispatchTouchEvent(MotionEvent e)
{
if (e.Action == MotionEventActions.Down)
{
touchDownPoint = new Xamarin.Forms.Point(e.GetX(), e.GetY());
}
else if (e.Action == MotionEventActions.Up)
{
var position = new Xamarin.Forms.Point(e.GetX(), e.GetY());
if (touchDownPoint == position) // this condition not gets satisfied in some devices
{
// single tap detected.
}
}
else if (e.Action == MotionEventActions.Move)
{
}
return base.DispatchTouchEvent(e);
}
I am just trying out the SDK Lite API and I am wondering how I can achieve to drag a MapMarker object from one place to another. I suggest, it works somehow with disabling the default onPan gesture, but actually the problem starts with picking an existing object.
Here is my code so far:
public void pickMarker(Point2D p) {
map.getGestures().disableDefaultAction(GestureType.PAN);
map.pickMapItems(p, 20f, pickMapItemsResult -> {
if (pickMapItemsResult != null) {
pickedMarker = pickMapItemsResult.getTopmostMarker();
} else {
map.getGestures().enableDefaultAction(GestureType.PAN);
}
});
}
public void dragMarker(Point2D p) {
if (pickedMarker != null) {
pickedMarker.setCoordinates(map.getCamera().viewToGeoCoordinates(p));
}
}
public boolean releaseMarker(Point2D p) {
map.getGestures().enableDefaultAction(GestureType.PAN);
if (pickedMarker != null) {
GeoCoordinates newCoordinates = map.getCamera().viewToGeoCoordinates(p);
pickedMarker.setCoordinates(newCoordinates);
pickedMarker = null;
return true;
}
return false;
}
while these functions are called on the three states of the onPanListener:
mapView.getGestures().setPanListener((gestureState, point2D, point2DUpdate, v) -> {
if (gestureState.equals(GestureState.BEGIN)) {
mapViewUIEngine.pickMarker(point2D);
}
if (gestureState.equals(GestureState.UPDATE)) {
mapViewUIEngine.dragMarker(point2DUpdate);
}
if (gestureState.equals(GestureState.END)) {
if (mapViewUIEngine.releaseMarker(point2DUpdate)) {
regionController.movePoint(0,
updateNewLocation(point2D, point2DUpdate);
}
}
});
From one of the developer in Github I now know, that the polygon is returned instead of the marker (which is lying on a polygon line, but how can I get the marker instead?
You can use map markers to precisely point to a location on the map.
The following method will add a custom map marker to the map:
MapImage mapImage = MapImageFactory.fromResource(context.getResources(), R.drawable.here_car);
MapMarker mapMarker = new MapMarker(geoCoordinates);
mapMarker.addImage(mapImage, new MapMarkerImageStyle());
mapView.getMapScene().addMapMarker(mapMarker);
For more details, please refer
https://developer.here.com/documentation/android-sdk/dev_guide/topics/map-items.html#add-map-markers
I work on Xamarin.Fomrs shared project. I want to display multiple images at same place with 100 ms interval. So that it will look like a GIF. In Android It is working. I created drawable file and in that I have put all the images with time interval. But in iOS, I am facing problem.
I found CAKeyFrameAnimation is used to implement this type of functionality. But I couldn't find how to implement it as I want.
I have implemented CAKeyFrameAnimation in ImageRenderer like this
class AnimatedImageRenderer : ImageRenderer
{
public AnimatedImageRenderer() { }
Animation objAnimation = new Animation();
protected override void OnElementChanged(ElementChangedEventArgs<Image> e)
{
base.OnElementChanged(e);
if (Control != null)
{
try
{
CAKeyFrameAnimation anim = CAKeyFrameAnimation.FromKeyPath("contents");
anim.Duration = 1;
//anim.KeyTimes = new[] {
// NSNumber.FromDouble (0), // FIRST VALUE MUST BE 0
// NSNumber.FromDouble (0.1),
// NSNumber.FromDouble(0.2),
// NSNumber.FromDouble(0.3),
// NSNumber.FromDouble(0.5),
// NSNumber.FromDouble(0.6),
// NSNumber.FromDouble(0.8),
// NSNumber.FromDouble(1.0), // LAST VALUE MUST BE 1
// };
anim.Values = new NSObject[] {
FromObject(UIImage.FromFile("bomb1.png")),
FromObject(UIImage.FromFile("bomb2.png")),
FromObject(UIImage.FromFile("bomb3.png")),
FromObject(UIImage.FromFile("bomb4.png")),
FromObject(UIImage.FromFile("bomb5.png")),
FromObject(UIImage.FromFile("bomb6.png")),
FromObject(UIImage.FromFile("bomb7.png")),
};
//anim.TimingFunction = CAMediaTimingFunction.FromName(CAMediaTimingFunction.Linear);
anim.RepeatCount = 1;
anim.RemovedOnCompletion = false;
//anim.CalculationMode = CAAnimation.AnimationLinear;
//c.Init();
Control.Layer.AddAnimation(anim, "bomb");
}
catch (System.Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
// ModCommon.TraceLog("AnimatedImageRenderer tm_Tick" + ex.Message);
}
}
}
}
I don't know what extra property is missing. Please guide me.
Thank you :)
You should use CGImage instead of UIImage. Change your animation's value to:
anim.Values = new NSObject[] {
FromObject(UIImage.FromFile("bomb1.png").CGImage),
FromObject(UIImage.FromFile("bomb2.png").CGImage),
FromObject(UIImage.FromFile("bomb3.png").CGImage),
FromObject(UIImage.FromFile("bomb4.png").CGImage),
FromObject(UIImage.FromFile("bomb5.png").CGImage),
FromObject(UIImage.FromFile("bomb6.png").CGImage),
FromObject(UIImage.FromFile("bomb7.png").CGImage),
};
I'm currently using TAB to navigate to next cell. selectNext() or selectRightCell() works fine when I'm using SelectionMode.SINGLE.
However, when using SelectionMode.MULTIPLE, its selecting multiple cells as I TAB.
I'm using a TableView. I need SelectionMode.MULTIPLE for the copy & paste function.
Is there a way to make it work in SelectionMode.MULTIPLE?
fixedTable.addEventFilter(KeyEvent.KEY_PRESSED, new EventHandler<KeyEvent>() {
#Override
public void handle(KeyEvent event) {
switch (event.getCode()){
case TAB:
if (event.isShiftDown()) {
fixedTable.getSelectionModel().selectPrevious();
} else {
fixedTable.getSelectionModel().selectNext();
}
event.consume();
break;
case ENTER:
return;
case C:
if(event.isControlDown()){
copySelectionToClipboard(fixedTable) ;
}
event.consume();
break;
case V:
if(event.isControlDown()){
pasteFromClipboard(fixedTable);
}
event.consume();
break;
default:
if (fixedTable.getEditingCell() == null) {
if (event.getCode().isLetterKey() || event.getCode().isDigitKey()) {
TablePosition focusedCellPosition = fixedTable.getFocusModel().getFocusedCell();
fixedTable.edit(focusedCellPosition.getRow(), focusedCellPosition.getTableColumn());
}
}
break;
}
}
});
You will need to handle the selection on your own. The reason is because the methods selectPrevious() and selectNext() tries to select the previous ( or the next ) without removing the current selected row ( when you set the selection mode to be SelectionMode.MULTIPLE) , also you can't use them and just remove the previous selecting by just calling clearSelection() because this will set the selected index to -1 and then the methods selectPrevious() and selectNext() will select the last or the first row only.
Here is how you could implement the selection on your own :
// the rest of your switch statement
...
case TAB:
// Find the current selected row
int currentSelection = table.getSelectionModel().getSelectedIndex();
// remove the previous selection
table.getSelectionModel().clearSelection();
if (event.isShiftDown()) {
currentSelection--;
} else {
currentSelection++;
}
// find the size of our table
int size = table.getItems().size() - 1;
// we was on the first element and we try to go back
if(currentSelection < 0){
// either do nothing or select the last entry
table.getSelectionModel().select(size);
}else if(currentSelection > size) {
// we are at the last index, do nothing or go to 0
table.getSelectionModel().select(0);
}else {
// we are between (0,size)
table.getSelectionModel().select(currentSelection);
}
event.consume();
break;
...
I have a button in my game. and I want to make it to change to other button image when mouse hover on it and change back when the mouse not in the button.
the problem is when the mouse went out from the button rectangle area, it not change back to the first image
my code like this :
public override void Update(GameTime gameTime)
{
base.Update(gameTime);
MouseState mouseState;
mouseDiBack = false;
mouseState = Mouse.GetState();
if (new Rectangle(mouseState.X, mouseState.Y, 1, 1).Intersects(backButtonRectangle))
{
backButton = backButtonHilite;
}
if ((mouseState.LeftButton == ButtonState.Pressed) &&
(new Rectangle(mouseState.X, mouseState.Y, 1, 1).Intersects(backButtonRectangle)))
{
mouseDiBack = true;
}
}
public override void Draw(GameTime gameTime)
{
spriteBatch.Draw(ScoreBG, ScoreBGRectangle, Color.White);
spriteBatch.Draw(backButton, backButtonRectangle, Color.White);
base.Draw(gameTime);
}
}
}
any idea how I to do it...?
Fairly simple solution, you didn't set the image back on the case where the mouse is not hovering.
if (new Rectangle(mouseState.X, mouseState.Y, 1, 1).Intersects(backButtonRectangle))
{
backButton = backButtonHilite;
}
else
{
backButton = originalImage; //whatever your Texture2D object may be called
}
Don't expect the machine to know that you want to switch back! Machines are stupid! ..Ok, it's actually because you overwrote the value of the variable and didn't reset it.
You are not setting your backButton back to what it used to be when the mouse moves out of the scope area. Take a look at the code below, and notice the added ELSE statement in your Update function.
defaultBackButton = backButton; //Save the default back button somewhere outside your update function
public override void Update(GameTime gameTime)
{
base.Update(gameTime);
MouseState mouseState;
mouseDiBack = false;
mouseState = Mouse.GetState();
if (new Rectangle(mouseState.X, mouseState.Y, 1,1).Intersects(backButtonRectangle))
{
backButton = backButtonHilite;
}
else
{
backButton = defaultBackButton;
}
if ((mouseState.LeftButton == ButtonState.Pressed) && (new Rectangle(mouseState.X, mouseState.Y, 1, 1).Intersects(backButtonRectangle)))
{
mouseDiBack = true;
}
}
As mentioned by Jon you need to set your original texture back when the mouse has left the rectangle.
bool mouseOverBackButton =
mouseX >= buttonRectangle.Left && mouseX <= buttonRectangle.Right &&
mouseY >= buttonRectangle.Top && mouseY <= buttonRectangle.Bottom;
backgroundTexture = mouseOverBackButton ? mouseOverTexture: mouseAwayTexture;
mouseDiBack = mouseState.LeftButton == ButtonState.Pressed && mouseOverBackButton;