I want to implement a list in Android that contains some customized views.
My problem is that I want the the views will be put one after the other with a little overlap between them. like in the following schema:
I also want to control this overlap in such a way that when the user clicks on one of the items, they will move apart from each other.
I tried to extend ListView but it seems to be very obscured, any suggestions?
Edit:
This can be more clear:
I did it by setting the divider height to -50dp.
this is exactly what I want to achieve, but somehow it doesn't reflect on my app.
I managed to achieve this by using scroll view with a single relative layout as a child.
I then dynamically place the views by defining a rule and margin:
for (int i = 0; i < 30; i++) {
TextView tv = new TextView(context);
tv.setText("Text \n Text" + i);
tv.setBackgroundColor(i % 2 == 0 ? Color.RED : Color.GREEN);
RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
lp.addRule(RelativeLayout.ALIGN_PARENT_TOP);
lp.leftMargin = 0;
lp.topMargin = (i * 45);
rl.addView(tv, lp);
}
Later, you can control the positioning of the sub-views by changing their y value (for example: if you want to add animation).
This is the final result:
This can probably be achieved by using the Camera.setTranslate function. See Android: Vertical ListView with overlaped rows and Android: vertical 3d listview for similar questions (with solutions)
Related
Using Vaadin Flow Java API I would like to emulate a Vaadin 8 Window feature: particularly I need to emulate Caption behaviour.
I mean a fixed top "Title" not scrollable as the real content of the Dialog. Anyone can tell me some Example I could learn from ?
Thanks in advance
This is the workaround I found.
public MainView() {
Button button = new Button("Click me",
event -> {
Dialog dialog = new Dialog();
HorizontalLayout horizontalLayout = new HorizontalLayout();
VerticalLayout verticalLayout = new VerticalLayout();
Div headerDiv = new Div();
Div bodyDiv = new Div();
bodyDiv.getElement().getStyle().set("overflow", "auto");
bodyDiv.getElement().getStyle().set("max-height", "420px"); // !!!
dialog.add(headerDiv, bodyDiv);
headerDiv.add(horizontalLayout);
bodyDiv.add(verticalLayout);
horizontalLayout.add(new Label("Hi there !"));
for (int i = 1; i <= 20; i++) {
verticalLayout.add(new TextField("TextField_" + i));
}
dialog.open();
});
add(button);
}
The trouble is that I have to fix max-height size to avoid scrolling of all the contained components. So I cannot take advantage from the auto-size behaviour of the Dialog Container. Also tried using setFlexGrow, but I did not reach the solution.
Any Hint ?
In Vaadin 10+ there is no component called Window, but there is component called Dialog. It does not have Title like Window, but otherwise it has similar baseline. I.e. it is popup. Based on your question you have found already that.
Dialog itself is component container, which means you can add components there. I would just create e.g two Divs (the simplest of the layout components in Vaadin 10). I would style the first one to have fixed height and place the Title there. And then I would apply component.getElement().getStyle().set("overflow", "auto") to the other one, which is the actual content body. The mentioned style will enable the scrollable feature. You could potentially use VerticalLayout / HorizontalLayout instead of Div as well depending what you need.
See also: https://vaadin.com/docs/v10/flow/migration/5-components.html
I am creating a app for both android and ios using xamarin and mvvmcross.
In the ios app I want to add outer vertical stackview having nested horizontal stackviews. Basically I just want to create a basic person details screen where will be Label on left and textfield on right which will go in one horizontal stackview and like this there will many horizontal stackviews nested in outer vertical stackview.
I am looking for such example on internet but seems most of the examples are in swift but I was hardly able to find some in c#.
Can someone please help.
Thanks,
Santosh
UIStackView leverages the power of Auto Layout and Size Classes to manage a stack of subviews, either horizontally or vertically, which dynamically responds to the orientation and screen size of the iOS device. You can learn about it through this documentation.
In your case, we can construct a vertical stack to place several horizontal stack:
UIStackView verticalStack = new UIStackView();
View.AddSubview(verticalStack);
verticalStack.Axis = UILayoutConstraintAxis.Vertical;
verticalStack.TranslatesAutoresizingMaskIntoConstraints = false;
// Use auto layout to embed this super vertical stack in the View. Also there's no need to set the height constraint, vertical stack will automatically adjust that depending on its content
verticalStack.LeadingAnchor.ConstraintEqualTo(View.LeadingAnchor).Active = true;
verticalStack.TopAnchor.ConstraintEqualTo(TopLayoutGuide.GetBottomAnchor()).Active = true;
verticalStack.TrailingAnchor.ConstraintEqualTo(View.TrailingAnchor).Active = true;
for (int i=0; i<10; i++)
{
// Here try to put some horizontal stack with Label on left and textfield on right in the father stack.
UIStackView horizontalStack = new UIStackView();
horizontalStack.Distribution = UIStackViewDistribution.EqualSpacing;
horizontalStack.Axis = UILayoutConstraintAxis.Horizontal;
// UIStackView should use AddArrangedSubview() to add subviews.
verticalStack.AddArrangedSubview(horizontalStack);
UILabel textLabel = new UILabel();
textLabel.Text = "text";
UITextField textField = new UITextField();
textField.Placeholder = "enter text";
horizontalStack.AddArrangedSubview(textLabel);
horizontalStack.AddArrangedSubview(textField);
}
But if every horizontal stack's subViews are almost the same style and layouts. Why not try to use UITableView? You just need to set the single cell's contents and layouts, then use it in the tableView. Moreover this control is reused and scrollable.
I have a JavaFX app which contains a line chart. I want users to be able to select the color of each series in the chart. Since the selection is dynamic I can't use static CSS to set the colors. I also have other controls that I need to set to the same color as the associated series. It's possible to set the line color of a series dynamically using code like this:
series.getNode().setStyle("-fx-stroke: " + color + ";");
That works well and I can use the user-specified color on the associated controls.
My problem is that I also need to set the color of the symbols for each series to the same color. I can't find any way to do that dynamically. All of the tutorials, documentation, and posts that I've read on the topic point to the static CSS approach.
Most charting widgets make this sort of thing very easy to do, but I've found no clues here or on the Oracle forums. Any guidance would be greatly appreciated.
-- Update --
I've found no way to do this other than to enumerate every data point in every series, grab the associated symbol node and set the style individually. Not what I was hoping for. In the process I realized that the default Node allocated for a symbol is a StackPane. I didn't need that flexibility so I replaced it with a Rectangle. This made rendering faster.
I'm late to the game, but maybe someone can use my solution. What worked for me, was iterating through every item in the data series and setting the CSS style for each one.
for (int index = 0; index < series.getData().size(); index++) {
XYChart.Data dataPoint = series.getData().get(index);
Node lineSymbol = dataPoint.getNode().lookup(".chart-line-symbol");
lineSymbol.setStyle("-fx-background-color: #00ff00, #000000; -fx-background-insets: 0, 2;\n" +
" -fx-background-radius: 3px;\n" +
" -fx-padding: 3px;");
}
I was stuck with a similar problem. I don't know upfront which data is going to be added to the graph, so I can't make use of a fixed stylesheet.
I came up with this solution. This code listens for new series added to graph. For every added series, it will create a new listener for data added to the series.
This listener will look up which series this is, the 0th, 1st, etc and then find the two nodes for the coloring of the line and of the legend/symbol.
As soon as it has set both, it can unsubscribe.
Problem can be that the legend/symbol node is not available yet when you receive the callback on the first added datapoint.
I'm aware it's very convoluted and I'm open to hear improvements.
At least it will give you the option to dynamically set the color to anything you want.
final LineChart<Number, Number> chart = new LineChart<>(new NumberAxis(), new NumberAxis());
final ObservableList<Series<Number, Number>> series = chart.getData();
series.addListener(new ListChangeListener<Series<Number, Number>>() {
#Override
public void onChanged(Change<? extends Series<Number, Number>> change) {
ObservableList<? extends Series<Number, Number>> list = change.getList();
for (final Series<Number, Number> serie : list) {
serie.getData().addListener(new ListChangeListener<Data<Number, Number>>() {
#Override
public void onChanged(Change<? extends Data<Number, Number>> ignore) {
int index = series.indexOf(serie);
Set<Node> nodes = chart.lookupAll(".series" + index);
boolean isStyleSet = false;
for (Node n : nodes) {
if (StringUtils.isEmpty(n.getStyle())) {
String css = "-fx-stroke: %s; -fx-background-color: %s, white; ";
String color = //assign dynamically here, for instance based on the name of the series
n.setStyle(String.format(css, color, color));
isStyleSet = true;
}
}
if (!isStyleSet & nodes.size() > 1) {
serie.getData().removeListener(this);
}
}
});
}
}
});
I had a problem which might be slightly different (possibly more complex); I needed to style some nodes of a series one color, others within the same series another color (I also needed to be able to change the allocation of color dynamically). I am working in JavaFx 2.2; I have css-styling, but of course that does not help here. I could not find my issue addressed anywhere; this was the closest I've found.
I just want to say that I could not get "series.getNode().setStyle("-fx-stroke: " + color + ";")" to work. However, using "-fx-background" instead does work. I hope this helps someone.
I have a FlowLayoutPanel and a UserControl.
I've added multiple usercontrols into the FlowLayoutPanel, and I'm trying to dock them to the top, so when I change the size of the FlowLayoutPanel the size (width) of the usercontrols changes accordingly.
You cannot dock anything inside a FlowLayoutPanel, it's simply ignored.
Check out the answer here apparently posted by the Microsoft team.
They say:
The FlowLayoutPanel relies on a largest control to effectively define the column/row within it. The code below set's the size of the first control to the width of the FLP to achieve a layout similar to what you want.
private void flowLayoutPanel1_Layout(object sender, LayoutEventArgs e)
{
flowLayoutPanel1.Controls[0].Dock = DockStyle.None;
for (int i = 1; i < flowLayoutPanel1.Controls.Count; i++)
{
flowLayoutPanel1.Controls[i].Dock = DockStyle.Top;
}
flowLayoutPanel1.Controls[0].Width = flowLayoutPanel1.DisplayRectangle.Width - flowLayoutPanel1.Controls[0].Margin.Horizontal;
}
Key thing is to use the Layout event.
This solution worked for me up to a point. Your UserControls have to have AutoSize turned off / stay a uniform size.
In my case I wanted AutoSize turned on so as to allow the UserControl to expand/contract vertically while filling the width of the FlowLayoutPanel.
I had to find a different solution. But the above might help you in your case.
I am developing a game app for blackberry where i want to place the buttons in a semi circle fashion on the home screen.....so far I have seen all the buttons being aligned either horizontally or vertically....is there any way out where we can place buttons at custom locations such as using a layout in android and hardcoding to place them in terms of pixels? Any help is greatly appreciated
thanks
You may do this by overriding sublayout in your field manager.
In the following example setPositionChild defines the X,Y position of the first field (field 0) added to this manager. To add additional fields increment the number in this.getField() and add the fields to hfm in the order you position them.
public HorizontalFieldManager testingXYPlacement() {
HorizontalFieldManager hfm = new HorizontalFieldManager() {
// Define the x,y, positions of the fields
protected void sublayout( int width, int height ) {
super.sublayout( width, height );
Field field = null;
field = this.getField(0);
if (field != null && equals(field.getManager())) {
setPositionChild(field, XPOS, YPOS);
}
setExtent( width, height);
}
};
hfm.add(new ButtonField("hello!"));
return hfm;
}
if you are used custom button than sometimes set margin is not working properly so used button.setpadding for place your desire location .please keep USEALLWIDTH for your Horizontal or Vertical layout
If your layout is a RelativeLayout you can position elements relative to other elements within the layout (or to the entire RelativeLayout). This directly lets you place views next to other views, and you can apply margins to offset the views from others.