I working on an UWP (Win10) App with a simple location picker function. The user can drag the map on the wanted location. A basic Pushpin thats always in the center of the Map window acts as the location indicator. It works just like the free location pick in WhatsApp.
To give the user feedback that he is moving the center pin, I want to raise the pin when the user is moving the map and lower it again on release.
Here the simple code to raise the pin (and manipulate the shadow):
private void MyMap_MapHolding(MapControl sender, MapInputEventArgs args)
{
iconSwitch = true;
if(iconSwitch == true) {
centerPin.Margin = new Thickness(0, 0, 0, 60);
centerPinShadow.Opacity = 0.3;
centerPinShadow.Width = 25;
}
But this event doesn't seem to be affected on click & hold or tap & hold. Am I missing something?
FYI: I tried this out with the MyMap_MapTapped(...) method, and it worked just fine, but I need it when the map is dragged not just tapped.
Chees!
I've tested and debugged, MapHolding event can't work by me either. For your purpose, CenterChangedLink event maybe helpful, I've tested it too.
Here is part of my sample code:
RandomAccessStreamReference mapIconStreamReference;
public Maptest()
{
this.InitializeComponent();
myMap.Loaded += MyMap_Loaded;
myMap.MapTapped += MyMap_MapTapped;
myMap.MapHolding += MyMap_MapHolding;
myMap.CenterChanged += MyMap_CenterChanged;
mapIconStreamReference = RandomAccessStreamReference.CreateFromUri(new Uri("ms-appx:///Assets/MapPin.png"));
}
private void MyMap_Loaded(object sender, RoutedEventArgs e)
{
myMap.Center =
new Geopoint(new BasicGeoposition()
{
//Geopoint for Seattle
Latitude = 47.604,
Longitude = -122.329
});
myMap.ZoomLevel = 12;
}
private void MyMap_MapTapped(Windows.UI.Xaml.Controls.Maps.MapControl sender, Windows.UI.Xaml.Controls.Maps.MapInputEventArgs args)
{
var tappedGeoPosition = args.Location.Position;
string status = "MapTapped at \nLatitude:" + tappedGeoPosition.Latitude + "\nLongitude: " + tappedGeoPosition.Longitude;
rootPage.NotifyUser( status, NotifyType.StatusMessage);
}
private void MyMap_MapHolding(Windows.UI.Xaml.Controls.Maps.MapControl sender, Windows.UI.Xaml.Controls.Maps.MapInputEventArgs args)
{
var holdingGeoPosition = args.Location.Position;
string status = "MapHolding at \nLatitude:" + holdingGeoPosition.Latitude + "\nLongitude: " + holdingGeoPosition.Longitude;
rootPage.NotifyUser(status, NotifyType.StatusMessage);
}
private void MyMap_CenterChanged(Windows.UI.Xaml.Controls.Maps.MapControl sender, object obj)
{
MapIcon mapIcon = new MapIcon();
mapIcon.Location = myMap.Center;
mapIcon.NormalizedAnchorPoint = new Point(0.5, 1.0);
mapIcon.Title = "Here";
mapIcon.Image = mapIconStreamReference;
mapIcon.ZIndex = 0;
myMap.MapElements.Add(mapIcon);
}
At first I thought, even when the MapHoling event can't work, the Tapped action before holding should handled by MapTapped event, but it is seems this action is ignored. So remember, if a user hold the Map but not move it, nothing will happen.
Related
While I'm using frame in Mainwindow , initially i hide an item in Mainwindows.
When i pressed a button in frame Page1 , I want to make item in mainwindow as visible.But i can't do it.I tried to updatelayout() , refresh() functions but anything is changed.Anyone has a knowledge about this??
This code is in MainWindow
private void Window_Loaded(object sender, RoutedEventArgs e)
{
müsteributton.IsEnabled = false;
string yer = "Pages/kullanicigiris.xaml";
frame1.Source = new Uri(yer, UriKind.Relative);
frame1.Margin = new Thickness(-175, 0, 0, 0);
}
This code is in kullanicigiris page
private void Dispatcher_Tick(object sender, EventArgs e)
{
i++;
if (i == 2)
{
dispatcher.Stop();
frm1 = new MainWindow();
frm1.frame1 = null;
DependencyObject currParent = VisualTreeHelper.GetParent(this);
while (currParent != null && frm1.frame1 == null)
{
frm1.frame1 = currParent as Frame;
currParent = VisualTreeHelper.GetParent(currParent);
}
// Change the page of the frame.
if (frm1.frame1 != null)
{
frm1.frame1.Source = new Uri("Window1.xaml", UriKind.Relative);
frm1.müsteributton.IsEnabled = true;
}
}
}
Thanks.
You can define a DependencyProperty in the MainWindows.
<TextBlock x:Name="textBlock" Height="399" TextWrapping="Wrap" Text="Show/ Hide" VerticalAlignment="Top" Visibility="{Binding SetVisibility, Mode=TwoWay,UpdateSourceTrigger=PropertyChanged}"/>
public static readonly DependencyProperty SetVisibilityProperty =
DependencyProperty.Register("SetVisibility", typeof(Visibility), typeof(Mainfreampage), new
PropertyMetadata(Visibility.Visible, null));
public Visibility SetVisibility
{
get { return (Visibility)GetValue(SetVisibilityProperty); }
set { SetValue(SetVisibilityProperty, value); }
}
In your page click event, you can use the following code find the MainWindows and change the DependencyProperty value.
var mw = Application.Current.Windows
.Cast<Mainfreampage>()
.FirstOrDefault(window => window is Mainfreampage) as Mainfreampage;
mw.SetVisibility = Visibility.Hidden;
Your bug is here:
frm1 = new MainWindow();
You are creating a brand new window, and then making your changes in that window.
But: that's not the window the user's looking at!
Taking the approach you've embarked on, your frame code needs to keep track of the Window object it's actually being hosted in, and then use that reference for dealing with the update.
That said, that entire approach is flawed. The navigation should be modeled in a view model data structure, activated via an ICommand object, and optionally via timer (as you seem to be doing here). Frame source and button state can be manipulated through bindings to properties in your view model data structure.
But, at the end of the day, the code you've got should work fine, once you start using the correct Window object.
I have a listener that captures the location every 10 seconds or 100 meters or so. I am using
xam.plugin.geolocator
to implement the listener. My problem is the location listener is not working(meaning the changes in location were not capturing or saved in the location cache) when my application is minimized or the application is opened but the phone is locked.
Here is my code:
async Task StartListening()
{
if (!CrossGeolocator.Current.IsListening)
{
var defaultgpsaccuracy = Convert.ToDouble(Preferences.Get("gpsaccuracy", String.Empty, "private_prefs"));
await CrossGeolocator.Current.StartListeningAsync(TimeSpan.FromSeconds(10), defaultgpsaccuracy, false, new Plugin.Geolocator.Abstractions.ListenerSettings
{
ActivityType = Plugin.Geolocator.Abstractions.ActivityType.Other,
AllowBackgroundUpdates = true,
DeferLocationUpdates = true,
DeferralDistanceMeters = 1,
DeferralTime = TimeSpan.FromSeconds(1),
ListenForSignificantChanges = true,
PauseLocationUpdatesAutomatically = false
});
}
}
I place this code in the first view/page of my application in my login.xaml.cs
Here are my questions:
How can I implement the listener properly so that when the application minimized or the phone/device is locked it still captures the changes of location?
What is the best GPS settings I need to capture the changes in location faster and accurately? Right now, my current settings are capturing the location every 10 seconds or 100 meters.
First you need to init StartListening then create event handlers for position changes and error handling
public Position CurrentPosition { get; set; }
public event EventHandler PositionChanged;
Don't forget to init it in your constructor :
CurrentPosition = new Position();
await CrossGeolocator.Current.StartListeningAsync(TimeSpan.FromSeconds(20), 10, true);
CrossGeolocator.Current.PositionChanged += PositionChanging;
CrossGeolocator.Current.PositionError += PositionError;
Functions :
`private void PositionChanging(object sender, PositionEventArgs e)
{
CurrentPosition = e.Position;
if (PositionChanged != null)
{
PositionChanged(this, null);
}
}
private void PositionError(object sender, PositionErrorEventArgs e)
{
Debug.WriteLine(e.Error);
}`
You can now call PositionChanged when ever you want the latest position
Don't forget to stop listening :
`public async Task StopListeningAsync()
{
if (!CrossGeolocator.Current.IsListening)
return;
await CrossGeolocator.Current.StopListeningAsync();
CrossGeolocator.Current.PositionChanged -= PositionChanging;
CrossGeolocator.Current.PositionError -= PositionError;
}`
I am really need help with return the coordinates x and y in the WP7 screen.
this code help me to move an rectangle in the screen with showing the start(x&y), delta(x,y) and end(x,y) :
TransformGroup transformG;
TranslateTransform translation;
// Constructor
public MainPage()
{
InitializeComponent();
this.ManipulationDelta += new EventHandler<ManipulationDeltaEventArgs>(MainPage_ManipulationDelta);
transformG = new TransformGroup();
translation = new TranslateTransform();
transformG.Children.Add(translation);
rectangle.RenderTransform = transformG;
}
void MainPage_ManipulationDelta(object sender, ManipulationDeltaEventArgs e)
{
startX.Text =e.ManipulationOrigin.X.ToString();
startY.Text = e.ManipulationOrigin.Y.ToString();
DeltaX.Text = e.DeltaManipulation.Translation.X.ToString();
DeltaY.Text = e.DeltaManipulation.Translation.Y.ToString();
translation.X += e.DeltaManipulation.Translation.X;
translation.Y += e.DeltaManipulation.Translation.Y;
EndX.Text =Convert.ToString(translation.X);
EndY.Text = Convert.ToString(translation.Y);
}
I just want to do something like that but without move anything, just tap in the screen and know the start and the end with delta (difference).
I use silverlight
You Should remove rectangle.RenderTransform = transformG; than the rectangle should stay on the same place.
I was wondering on windows 7 there is the function that when your mouse hits the form left/right top it will auto size the window to half the screen. I am trying to do that with my MDI Child. Here is the code that I have, however the function does not work.
private void Form1_MouseMove(object sender, MouseEventArgs e)
{
Form1 f1 = new Form1();
if (e.X == f1.Width/2 - 30)
{
Form activeChild = this.ActiveMdiChild;
activeChild.Width = this.Width / 2;
activeChild.Height = this.Height;
activeChild.Dock = DockStyle.Left;
}
}
You might try doing that on the Move event of the actual child form. Handling the event based on a new instance of Form1 in any event won't work very well. Anyhow, here's some code as it would look inside the child. (Ugly, but it at least does something.)
private void SubForm_Move(object sender, EventArgs e)
{
if (Location.X <= 0)
{
Width = MdiParent.Width / 2;
Height = MdiParent.Height;
Location = new Point(0,0);
Dock = DockStyle.Left;
}
}
I'm new to Windows Forms, in my project, i need to change the image in the picture box at runtime. I'm able to do that with the help of a timer. The picture just gets changed. Is it possible to do some transitions when image changes, for example fade in, fade out, blur etc.. If possible could some one please let me know how to do it. I searched in net but in vain.Thanks in advance.
Varun
Simply take new code file and paste below code in it
an original answer for the similar question, answer taken from another question
Answer
using System;
using System.Drawing;
using System.Drawing.Imaging;
using System.Windows.Forms;
public class BlendPanel : Panel
{
private Image mImg1;
private Image mImg2;
private float mBlend;
public BlendPanel()
{
SetStyle(ControlStyles.AllPaintingInWmPaint | ControlStyles.UserPaint | ControlStyles.OptimizedDoubleBuffer, true);
}
public Image Image1
{
get { return mImg1; }
set { mImg1 = value; Invalidate(); }
}
public Image Image2
{
get { return mImg2; }
set { mImg2 = value; Invalidate(); }
}
public float Blend
{
get { return mBlend; }
set { mBlend = value; Invalidate(); }
}
protected override void OnPaint(PaintEventArgs e)
{
if (mImg1 == null || mImg2 == null)
e.Graphics.FillRectangle(new SolidBrush(this.BackColor), new Rectangle(0, 0, this.Width, this.Height));
else
{
Rectangle rc = new Rectangle(0, 0, this.Width, this.Height);
ColorMatrix cm = new ColorMatrix();
ImageAttributes ia = new ImageAttributes();
cm.Matrix33 = mBlend;
ia.SetColorMatrix(cm);
e.Graphics.DrawImage(mImg2, rc, 0, 0, mImg2.Width, mImg2.Height, GraphicsUnit.Pixel, ia);
cm.Matrix33 = 1F - mBlend;
ia.SetColorMatrix(cm);
e.Graphics.DrawImage(mImg1, rc, 0, 0, mImg1.Width, mImg1.Height, GraphicsUnit.Pixel, ia);
}
base.OnPaint(e);
}
}
Build your project. You can now drop a BlendPanel from the top of the toolbox onto your form. Here's a sample program that uses it:
private float mBlend;
private int mDir = 1;
public int count = 0;
public Bitmap[] pictures;
public void myPhoto()
{
pictures = new Bitmap[9];
pictures[0] = new Bitmap(#"Library Images\cf3.jpg");
pictures[1] = new Bitmap(#"Library Images\cf4.jpg");
pictures[2] = new Bitmap(#"Library Images\l1.JPG");
pictures[3] = new Bitmap(#"Library Images\l2.JPG");
pictures[4] = new Bitmap(#"Library Images\l3.JPG");
pictures[5] = new Bitmap(#"Library Images\l4.JPG");
pictures[6] = new Bitmap(#"Library Images\l5.JPG");
pictures[7] = new Bitmap(#"Library Images\l6.JPG");
pictures[8] = new Bitmap(#"Library Images\l7.JPG");
timer1.Interval = 50; //time of transition
timer1.Tick += BlendTick;
try
{
blendPanel1.Image1 = pictures[count];
blendPanel1.Image2 = pictures[++count];
}
catch
{
}
timer1.Enabled = true;
}
private void BlendTick(object sender, EventArgs e)
{
mBlend += mDir * 0.02F;
if (mBlend > 1)
{
mBlend = 0.0F;
if ((count + 1) < pictures.Length)
{
blendPanel1.Image1 = pictures[count];
blendPanel1.Image2 = pictures[++count];
}
else
{
blendPanel1.Image1 = pictures[count];
blendPanel1.Image2 = pictures[0];
count = 0;
}
}
blendPanel1.Blend = mBlend;
}
You'll need to modify the new Bitmap(#"yourimagePath"); calls. Build and run. You should see the displayed image smoothly morph from your first image to your second image without any flickering.
I hope it helps for other...
There is no built-in support for such effects, but you can implement them. I'd suggest to write a custom control that renders the image and have a method for fade-swap, fade itself can be reached with alpha-blending drawing with .NET Graphics class.
However, Graphics class isn't very fast, I don't recommend to use this technique for big images. If you need some fancy UI with hw-accelerated effects, take a look at WPF.
Blend effects are easy to get going by using the ColorMatrix class. There's a good example available in my answer in this thread.
A simple way to get a blur is to resize the image, making it smaller, then redraw it back, making it larger. The Graphics.InterpolationMode property affects the type of blur you'll get.
Those are quicky do-it-yourself solutions. Any decent graphics library has these kind of operations built-in. You probably want something free, check out ImageMagick.NET
To put it simply, not without external (3rd-party) libraries.