I want to make a 3D pie chart in my app but I am finding difficult to find the solution that shows the percentage and name for the area of selected region in the graph.
I am using AnimatedCircularChart and for that the package is:
import 'package:flutter_circular_chart/flutter_circular_chart.dart';
> AnimatedCircularChart(
key: _chartKey,
size: _chartSize,
initialChartData: _quarterlyProfitPieData[0],
chartType: CircularChartType.Pie,
I want the label over the selected region.
Please try this package flutter_echarts: https://pub.dev/packages/flutter_echarts
It has the capability of WebGL 3D Charts
See this example:
https://github.com/entronad/flutter_echarts/tree/master/example
The Flutter Circular Chart is cool animated chart library, but it is hard to give custom modification such giving label on top of it.
I Found Chart Flutter library is a good alternative for your case. It can create Pie Chart with a custom label. And the best part is you can animate it too. This open source library maintained by Google Team.
Here some example code implementation with Chart Flutter:
import 'package:charts_flutter/flutter.dart' as charts;
import 'package:flutter/material.dart';
class PieOutsideLabelChart extends StatelessWidget {
final List<charts.Series> seriesList;
final bool animate;
PieOutsideLabelChart(this.seriesList, {this.animate});
/// Creates a [PieChart] with sample data and no transition.
factory PieOutsideLabelChart.withSampleData() {
return new PieOutsideLabelChart(
_createSampleData(),
// Disable animations for image tests.
animate: false,
);
}
#override
Widget build(BuildContext context) {
return new charts.PieChart(seriesList,
animate: animate,
// Add an [ArcLabelDecorator] configured to render labels outside of the
// arc with a leader line.
//
// Text style for inside / outside can be controlled independently by
// setting [insideLabelStyleSpec] and [outsideLabelStyleSpec].
//
// Example configuring different styles for inside/outside:
// new charts.ArcLabelDecorator(
// insideLabelStyleSpec: new charts.TextStyleSpec(...),
// outsideLabelStyleSpec: new charts.TextStyleSpec(...)),
defaultRenderer: new charts.ArcRendererConfig(arcRendererDecorators: [
new charts.ArcLabelDecorator(
labelPosition: charts.ArcLabelPosition.outside)
]));
}
/// Create one series with sample hard coded data.
static List<charts.Series<LinearSales, int>> _createSampleData() {
final data = [
new LinearSales(0, 100),
new LinearSales(1, 75),
new LinearSales(2, 25),
new LinearSales(3, 5),
];
return [
new charts.Series<LinearSales, int>(
id: 'Sales',
domainFn: (LinearSales sales, _) => sales.year,
measureFn: (LinearSales sales, _) => sales.sales,
data: data,
// Set a label accessor to control the text of the arc label.
labelAccessorFn: (LinearSales row, _) => '${row.year}: ${row.sales}',
)
];
}
}
/// Sample linear data type.
class LinearSales {
final int year;
final int sales;
LinearSales(this.year, this.sales);
}
Result:
Related
Trying to link shapes to slides the same way it's done with images.
.
.
Reason for this request is linking images seems much harder in terms of locating the exact one to be linked.
Have realized it might be best to link shapes through match/search text then insert the images after.
Codes attempted though please ignore if completely irrelevent.
function myFunction(){
var searchText = "IMAGE1";
var presentation = SlidesApp.getActivePresentation();
var slide = presentation.getSlides()[4];
// 2. Replace the shape which has the text of "searchText" with the image of "imageUrl".
slide.getShapes().forEach(s => {
if (s.getText().asString().toLocaleUpperCase().includes(searchText.toLocaleUpperCase())) {
s.setLinkSlide('INSERT_SLIDE_LINK');
}
}
)
}
Slides Example
Thank you
I believe your goal is as follows.
You want to link the shape to a slide by searching the text in the shape on Google Slides.
You want to achieve this using Google Apps Script.
setLinkSlide can use Slides Object. I thought that this might be able to be used.
Sample script:
function myFunction() {
const obj = { text1: 3, text2: 3, text3: 4, text4: 5, text5: 4, text6: 3 }; // This is from your showing sample image.
const slides = SlidesApp.getActivePresentation().getSlides();
slides.forEach(s => {
s.getShapes().forEach(shape => {
const t = obj[shape.getText().asString().toLowerCase().trim()];
if (t) {
shape.setLinkSlide(slides[t - 1]);
}
});
});
}
Note:
This sample script is for your provided sample Google Slides. When you change this, please modify obj. Please be careful about this.
Reference:
setLinkSlide(slide)
SUGGESTION
If I've understood your post correctly, these are your goals:
Check the text on each of the shapes in your slides
See if the current text shape matches the current searchText value
If true, link a dedicated slide to the current shape.
Sample Tweaked Script
function sample() {
var presentation = SlidesApp.getActivePresentation();
var slide = presentation.getSlides();
//Define the 'searchText' value & it's dedicated slide to be linked
var find = {
search: [["Text1", slide[1]],
["Text2", slide[2]],
["Text3", slide[3]]]
};
find.search.forEach(d => {
let searchText = d[0];
let linkSlide = d[1];
slide[0].getShapes().forEach(s => {
s.getText().asString().trim().toLowerCase() === searchText.toLowerCase() ? s.setLinkSlide(linkSlide) : null;
});
})
}
Original Question
I want to add a loading indicator overlay to the grid.
I tried to append the overlay element to the shadow root by using the attachShadow method.
The following code works well in vaadin 22.
final Grid<String> grid = new Grid<>();
final Element element = new Element("div");
element.setText("Hello");
add(grid);
grid.getElement().attachShadow().appendChild(element);
When I execute the same code in vaadin 23 it breaks the component.
Alternative solution
I tried to extend the grid component on the client side with the following typescript code
import { Grid } from "#vaadin/grid";
export class CustomGrid extends Grid {
static get is() {
return 'custom-grid';
}
}
customElements.define(CustomGrid.is, CustomGrid);
To use my custom grid in flow, I have extended the flow Grid class and added my custom typescript code with the #JsModule annotation.
#Tag("custom-grid")
#JsModule("./src/custom-grid/custom-grid.ts")
public class CustomGrid<T> extends Grid<T> {
}
I used the following code to add my custom grid to the layout
final CustomGrid<String> grid = new CustomGrid<>();
grid.addColumn(s -> s).setHeader("Hello");
grid.setItems(List.of("Item 1", "Item 2", "Item 3"));
add(grid);
The problem
The items are not visible. There are just blank rows.
ps: extending other components like buttons or comboboxes works pretty well.
I faced the same issue with my own customization of Vaadin's Grid.
I did exactly the same as you - and it worked with v22 but it does not with v23.
Although it's a dirty hack, it works by doing the follwing:
final Grid<String> grid = new Grid<>();
add(grid);
grid.getElement().executeJs("elem = document.createElement(\"div\"); elem.innerHTML=\"Hallo\"; this.shadowRoot.appendChild(elem);");
Is it possible in flutter to have the bottom sheet partially viewable at an initial state and then be able to either expand/dismiss?
I've included a screenshot of an example that Google Maps implements.
Use the DraggableScrollableSheet widget with the Stack widget:
Here's the gist for the entire page in this^ GIF, or try the Codepen.
Here's the structure of the entire page:
#override
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: <Widget>[
CustomGoogleMap(),
CustomHeader(),
DraggableScrollableSheet(
initialChildSize: 0.30,
minChildSize: 0.15,
builder: (BuildContext context, ScrollController scrollController) {
return SingleChildScrollView(
controller: scrollController,
child: CustomScrollViewContent(),
);
},
),
],
),
);
}
In the Stack:
- The Google map is the lower most layer.
- The Header (search field + horizontally scrolling chips) is above the map.
- The DraggableBottomSheet is above the Header.
Some useful parameters as defined in draggable_scrollable_sheet.dart:
/// The initial fractional value of the parent container's height to use when
/// displaying the widget.
///
/// The default value is `0.5`.
final double initialChildSize;
/// The minimum fractional value of the parent container's height to use when
/// displaying the widget.
///
/// The default value is `0.25`.
final double minChildSize;
/// The maximum fractional value of the parent container's height to use when
/// displaying the widget.
///
/// The default value is `1.0`.
final double maxChildSize;
Edit: Thank you #Alejandro for pointing out the typo in the widget name :)
I will be implementing the same behaviour in the next few weeks and I will be referring to the backdrop implementation in Flutter Gallery, I was able to modify it previously to swipe to display and hide (with a peek area).
To be precise you can replicate the desired effect by changing this line of code in backdrop_demo.dart from Flutter Gallery :
void _handleDragUpdate(DragUpdateDetails details) {
if (_controller.isAnimating)// || _controller.status == AnimationStatus.completed)
return;
_controller.value -= details.primaryDelta / (_backdropHeight ?? details.primaryDelta);
}
I have just commented the controller status check to allow the panel to be swipe-able.
I know this isn't the complete implementation you are looking for, but I hope this helps you in any way.
This question already has answers here:
Flutter Keyboard listen on hide and show
(8 answers)
Closed last year.
I have a BottomNavigationBar at the upper-most level of my application. I want to detect keyboard open and close basically anywhere in the app/subtree, so I can show and hide the BottomNavigationBar whenever the keyboard is visible.
This is a general issue and may not be directly related to the BottomNavigationBar. In other words, abstract from the BottomNavigationBar :-)
To check for keyboard visibility, just check for the viewInsets property anywhere in the widget tree. The keyboard is hidden when viewInsets.bottom is equal to zero.
You can check for the viewInsets with MediaQuery like:
MediaQuery.of(context).viewInsets.bottom
I just created a Flutter plugin to notify about keyboard open and close events. It works both on Android and iOS.
keyboard_visibility
import 'package:keyboard_visibility/keyboard_visibility.dart';
#override
void initState() {
super.initState();
KeyboardVisibilityNotification().addNewListener(
onChange: (bool visible) {
print(visible);
},
);
}
You can use WidgetsBinding.instance.window.viewInsets.bottom. If its value is greater than 0.0 then the keyboard is visible.
if(WidgetsBinding.instance.window.viewInsets.bottom > 0.0)
{
// Keyboard is visible.
}
else
{
// Keyboard is not visible.
}
You can use the keyboard_visibility package to do this effectively. I've used it, and it works like a charm.
To install
dependencies:
keyboard_visibility: ^0.5.2
Usage
import 'package:keyboard_visibility/keyboard_visibility.dart';
#protected
void initState() {
super.initState();
KeyboardVisibilityNotification().addNewListener(
onChange: (bool visible) {
print(visible);
},
);
}
It also supports listeners like show/hide.
Here is the link.
In your StatefullWidget, create a variable:
bool _keyboardVisible = false;
Then initialize that variable in the build widget;
#override
Widget build(BuildContext context) {
_keyboardVisible = MediaQuery.of(context).viewInsets.bottom != 0;
return child;
}
This is my solution, which uses WidgetsBindingObserver to observe window size changes, and determine whether the keyboard is hidden based on this.
/// My widget state，it can remove the focus to end editing when the keyboard is hidden.
class MyWidgetState extends State<MyWidget> with WidgetsBindingObserver {
/// Determine whether the keyboard is hidden.
Future<bool> get keyboardHidden async {
// If the embedded value at the bottom of the window is not greater than 0, the keyboard is not displayed.
final check = () => (WidgetsBinding.instance?.window.viewInsets.bottom ?? 0) <= 0;
// If the keyboard is displayed, return the result directly.
if (!check()) return false;
// If the keyboard is hidden, in order to cope with the misjudgment caused by the keyboard display/hidden animation process, wait for 0.1 seconds and then check again and return the result.
return await Future.delayed(Duration(milliseconds: 100), () => check());
}
#override
void initState() {
super.initState();
// Used to obtain the change of the window size to determine whether the keyboard is hidden.
WidgetsBinding.instance?.addObserver(this);
}
#override
void dispose() {
// stop Observing the window size changes.
WidgetsBinding.instance?.removeObserver(this);
super.dispose();
}
#override
void didChangeMetrics() {
// When the window insets changes, the method will be called by the system, where we can judge whether the keyboard is hidden.
// If the keyboard is hidden, unfocus to end editing.
keyboardHidden.then((value) => value ? FocusManager.instance.primaryFocus?.unfocus() : null);
}
}
You can use MediaQuery.of(context).viewInsets.bottom. Just look at the documentation below.
/// The parts of the display that are completely obscured by system UI, /// typically by the device's keyboard. /// /// When a
mobile device's keyboard is visible viewInsets.bottom ///
corresponds to the top of the keyboard. /// /// This value is
independent of the [padding]: both values are /// measured from the
edges of the [MediaQuery] widget's bounds. The /// bounds of the top
level MediaQuery created by [WidgetsApp] are the /// same as the
window (often the mobile device screen) that contains the app. ///
/// See also: /// /// * [MediaQueryData], which provides some
additional detail about this /// property and how it differs from
[padding]. final EdgeInsets viewInsets;
You can use
Flutter keyboard visibility plugin
#override
Widget build(BuildContext context) {
return KeyboardVisibilityBuilder(
builder: (context, isKeyboardVisible) {
return Text(
'The keyboard is: ${isKeyboardVisible ? 'VISIBLE' : 'NOT VISIBLE'}',
);
}
);
With Flutter 2.0 and null safety, I use this package - it has no streams, pure Dart, gives additional information about keyboard height, etc.
flutter_keyboard_size 1.0.0+4
I used a workaround. I added a focusNode to the input and added a listener to that.
See the implementation here add focus listener to input.
I found an easier solution here:
Put the DesiredBottomWidget in a Stack() with a Positioned(top: somevalue), and it will be hidden when the keyboard appears.
Example:
Stack(
"Somewidget()",
Positioned(
top: "somevalue",
child: "DesiredBottomWidget()"),
),
I am using spreadsheetgear, and I want to place the combobox (ComponentOne) into 1 cell. I want that when the user go to this cell, this combobox will activate and show the list to user. After user chose item on the list, it will place this item into the cell value and hide the combobox.
How to do it in Spreadsheetgear.
Thanks,
Doit
I am not familiar with ComponentOne controls, so cannot really speak for that portion of your question. However, regarding a more general approach to embedding custom controls onto a SpreadsheetGear WorkbookView UI control, this is possible by sub-classing the UIManager class, which would allow you to intercept the creation of existing shapes on a worksheet and replace them with your own custom controls.
Below is a simple example that demonstrates this with the Windows Forms WorkbookView control and a sub-class of SpreadsheetGear.Windows.Forms.UIManager. This example just replaces a rectangle AutoShape with a button. You could modify it to show a ComponentOne CheckBox instead.
Note that the UIManager.CreateCustomControl(...) method gets called anytime a shape is scrolled into view / made visible on the WorkbookView. Also note that that your custom control will be disposed of every time it is scrolled out of view or otherwise made invisible. Please see the documentation for more details on this API.
Another important point about shapes and worksheets in general--shapes are not embedded inside a cell. Instead they hover over cells. So there will be no explicit "link" between a given shape and a given cell. The closest you could come to making such an association is with the IShape.TopLeftCell or BottomRightCell properties, which will provide the ranges for which this shape's respective edges reside over. The IShape interface contains a number of other API that you might find useful in your use-case. For instance, you can hide a shape by setting the IShape.Visible property to false.
using System;
using System.Windows.Forms;
using SpreadsheetGear;
using SpreadsheetGear.Shapes;
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
// Create the UIManager replacement.
new MyUIManager(workbookView1.ActiveWorkbookSet);
}
private void buttonRunSample_Click(object sender, EventArgs e)
{
// NOTE: Must acquire a workbook set lock.
workbookView1.GetLock();
try
{
// Get a reference to the active worksheet and window information.
IWorksheetWindowInfo windowInfo = workbookView1.ActiveWorksheetWindowInfo;
IWorksheet worksheet = workbookView1.ActiveWorksheet;
// Get a reference to a cell.
IRange cell = workbookView1.ActiveWorksheet.Cells["B2"];
// Add a placeholder shape to the worksheet's shape collection.
// This shape will be replaced with a custom control.
double left = windowInfo.ColumnToPoints(cell.Column) + 5;
double top = windowInfo.RowToPoints(cell.Row) + 5;
double width = 100;
double height = 30;
IShape shape = worksheet.Shapes.AddShape(AutoShapeType.Rectangle, left, top, width, height);
// Set the name of the shape for identification purposes.
shape.Name = "MyCustomControl";
}
finally
{
// NOTE: Must release the workbook set lock.
workbookView1.ReleaseLock();
}
buttonRunSample.Enabled = false;
}
// UIManager replacement class.
private class MyUIManager : SpreadsheetGear.Windows.Forms.UIManager
{
private Button _customControl;
public MyUIManager(IWorkbookSet workbookSet)
: base(workbookSet)
{
_customControl = null;
}
// Override to substitute a custom control for any existing shape in the worksheet.
// This method is called when a control is first displayed within the WorkbookView.
public override System.Windows.Forms.Control CreateCustomControl(IShape shape)
{
// If the shape name matches...
if (String.Equals(shape.Name, "MyCustomControl"))
{
// Verify that a control does not already exist.
System.Diagnostics.Debug.Assert(_customControl == null);
// Create a custom control and set various properties.
_customControl = new Button();
_customControl.Text = "My Custom Button";
// Add a Click event handler.
_customControl.Click += new EventHandler(CustomControl_Click);
// Add an event handler so that we know when the control
// has been disposed. The control will be disposed when
// it is no longer in the viewable area of the WorkbookView.
_customControl.Disposed += new EventHandler(CustomControl_Disposed);
return _customControl;
}
return base.CreateCustomControl(shape);
}
private void CustomControl_Click(object sender, EventArgs e)
{
MessageBox.Show("Custom Control was Clicked!");
}
private void CustomControl_Disposed(object sender, EventArgs e)
{
// Add any cleanup code here...
// Set the custom control reference to null.
_customControl = null;
}
}
}