I'm trying to get clicked point on a deveexpress 1.14 line chart in winforms. It works fine with LineSeriesView MarkerVisibility set to true, but I don't want the points to be marked like that, i want a smoth line. How can i get the Seriespoint without doing that?
private void chart_MouseClick(object sender, MouseEventArgs e) {
// Obtain the object being clicked.
ChartHitInfo hi = chart.CalcHitInfo(e.X, e.Y);
// Check whether it was a series point, and if yes -
// obtain its argument, and pass it to the detail series.
SeriesPoint point = hi.SeriesPoint; // hi.SeriesPoint IS NULL
if (point != null) {
// do stuff
}
}
The runtimeHitTesting is on for that chart
Thanks!
Hacked:
void chart_CustomDrawSeries(object sender, CustomDrawSeriesEventArgs e)
{
LineDrawOptions drawOptions = e.SeriesDrawOptions as LineDrawOptions;
if (drawOptions == null)
return;
drawOptions.Marker.Color = Color.Transparent;
drawOptions.Marker.BorderColor = Color.Transparent;
}
Remeber to set `this.chart.CacheToMemory = true; so the event don't fire all the time.
Related
I have a WPF app with two canvases which overlay each other . . .
<Canvas Name="GeometryCnv" Canvas.Top="0" Canvas.Left="0" Margin="10,21,315,251" />
<Canvas Name="ROIcnv" Background ="Transparent" Canvas.Top="0" Canvas.Left="0" Margin="10,21,315,251" MouseDown="ROIcnvMouseDown" MouseUp="ROIcnvMouseUp" MouseMove="ROIcnvMouseMove"/>
I draw some geometry on the first canvas and I draw a rectangle to denote a Region on Interest (ROI) on the second one, using the Mouse-down event to start the drawing, Mouse-move events while drawing (resizing or positioning) the rectangle, and the Mouse-up event to end the drawing.
Except that it's not handling the events reliably. It gets the initial Mouse-down event to start it. It gets Mouse-move events continuously - regardless of whether the mouse is moving - and it does not get the Mouse-up event at all, nor does it get any subsequent mouse down events, say if I double-click the mouse.
The event-handler code looks like this . . .
private void ROIcnvMouseDown(object sender, MouseButtonEventArgs e)
{
MouseLineBegin = Mouse.GetPosition(ROIcnv);
bMouseDown = true;
}
private void ROIcnvMouseUp(object sender, MouseButtonEventArgs e)
{
MouseLineEnd = Mouse.GetPosition(ROIcnv);
bMouseDown = false;
}
private void ROIcnvMouseMove(object sender, MouseEventArgs e)
{
iMM++; // counting mouse move events
ROIcnv.Children.Clear(); // clear the ROI canvas
if (bMouseDown) // if we're drawing now
{
MouseLineEnd = Mouse.GetPosition(ROIcnv);
// get the upper left and lower right = coords from the beginning and end points . . .
int ulx = 0;
int uly = 0;
int lrx = 0;
int lry = 0;
if (MouseLineEnd.X >= MouseLineBegin.X)
{
ulx = (int) MouseLineBegin.X;
lrx = (int) MouseLineEnd.X;
}
else
{
lrx = (int)MouseLineBegin.X;
ulx = (int)MouseLineEnd.X;
}
if (MouseLineEnd.Y >= MouseLineBegin.Y)
{
uly = (int)MouseLineBegin.Y;
lry = (int)MouseLineEnd.Y;
}
else
{
lry = (int)MouseLineBegin.Y;
uly = (int)MouseLineEnd.Y;
}
int h = Math.Abs(lry-uly);
int w = Math.Abs(lrx-ulx);
var rect = new Path
{
Data = new RectangleGeometry(new Rect(ulx, uly, w, h)),
Stroke = Brushes.Black,
StrokeThickness = 2
};
ROIcnv.Children.Add(rect);
}
}
... I've tried suspending the mouse in mid-air and resting it on towels to eliminate any vibrations that might cause spurious move events with no benefit, any anyway that wouldn't account for not getting subsequent up and down events.
Note: I tried this on another computer with exactly the same results.
You'll have much better responses if you provide a minimal, working example of your problem (specifically both your ROIcnvMouseDown and ROIcnvMouseUp methods are missing as are all of your property declarations). The problem is possibly due to your newly-created Path object interfering with the mouse messages, if so then it can be fixed by setting it's IsHitTestVisible property to false. Need a minimal example to determine this for sure though.
UPDATE: Sorry, my bad, I must have stuffed up the cut-n-paste into my test app. Try capturing the mouse in response to the mouse down event:
private void ROIcnvMouseDown(object sender, MouseButtonEventArgs e)
{
MouseLineBegin = Mouse.GetPosition(ROIcnv);
bMouseDown = true;
Mouse.Capture(sender as IInputElement);
}
And of course you need to release it in response to MouseUp:
private void ROIcnvMouseUp(object sender, MouseButtonEventArgs e)
{
MouseLineEnd = Mouse.GetPosition(ROIcnv);
bMouseDown = false;
Mouse.Capture(sender as IInputElement, CaptureMode.None);
ROIcnv.Children.Clear();
}
The other thing I've done is call ROIcnv.Children.Clear(); in response to MouseUp as I assume you no longer want the selection rectangle to be visible. On my machine this doesn't result in any spurious mouse move events.
Does that answer the question?
is it possible to add button click event? i want to add controls dynamicly but i don't bind event's to my controls.
this.buttonDeneme = new System.Windows.Forms.Button();
this.buttonDeneme.Location = new System.Drawing.Point(150, 90);
this.buttonDeneme.Name = "button1";
this.buttonDeneme.Size = new System.Drawing.Size(122, 23);
this.buttonDeneme.TabIndex = 0;
this.buttonDeneme.Text = "FileUpload";
this.buttonDeneme.UseVisualStyleBackColor = true;
this.buttonDeneme.Click += ????
#dotTutorial answer is going to work but lot's people still have difficulty with Linq and Lambda expression so if you don't understand it the very basic way to write this is :
this.buttonDeneme.Click += new EventHandler(MyCustomClickHandler);
void MyCustomClickHandler(object sender, EventArgs e)
{
// do whatever you want here
}
but creating multiple button is usually because they wont do the same exact thing so you might want to set the this.buttonDeneme.Tag to some sort of identifier. i prefer using string in there.
then in the click event you can retrieve that value and know what to do. here a corrected version with the Tag used :
this.buttonDeneme.Tag = "SearchBook";
this.buttonDeneme.Click += new EventHandler(MyCustomClickHandler);
void MyCustomClickHandler(object sender, EventArgs e)
{
// for button created above the value when
// the click is called will be "SearchBook"
string sTag = ((Button)sender).Tag.ToString();
if(sTag == "SearchBook")
{
// do stuff for search book
}
else if(sTag == "blablabla")
{
// do other stuff
}
}
The easiest alternative would be to use a lambda expression.
this.buttonDeneme.Click += ((s, e) => {
// The code that handles a click event
});
's' will be the sender object and 'e' the eventargs.
I'm in trouble with a Marquee ProgressBar. I need to execute a method (refreshList()) to get a List<string>. Then I assign this List to a ComboBox, so ComboBox refreshes with the new Items. As refreshList() take 3 or 4 sec, I wanted to run a Marquee ProgressBar. But I couldn't. ProgressBar is ok, but ComboBox doesn't load new Items.
My refreshList() method:
private void refreshList(List<string> list)
{
albumList.DataSource = null;
albumList.DataSource = list;
}
I have the following code, it works fine:
private void changeDirectoryToolStripMenuItem_Click(object sender, EventArgs e)
{
fbd.RootFolder = Environment.SpecialFolder.MyComputer;
folderPath = "";
if (fbd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
folderPath = fbd.SelectedPath;
refreshList(N.getList(folderPath));
}
}
But I added a ProgressBar and wrote this code:
private void changeDirectoryToolStripMenuItem_Click(object sender, EventArgs e)
{
fbd.RootFolder = Environment.SpecialFolder.MyComputer;
folderPath = "";
if (fbd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
folderPath = fbd.SelectedPath;
bgWorker.WorkerReportsProgress = true;
bgWorker.RunWorkerAsync();
}
}
And I placed refreshList() in doWork() method:
private void bgWorker_DoWork(object sender, DoWorkEventArgs e)
{
refreshList(N.getList(folderPath));
}
But unfortunately this isn't working. Can anybody help me solving this problem? Thanks in advance.
You can use the MarqueeAnimationSpeed and Value properties of the ProgressBar control to stop and start the Marquee. There's no need to use WorkerReportsProgress* as you aren't incrementing a normal progress bar - you just want to "spin" the Marquee.
You can do something like the following:
public Form1()
{
InitializeComponent();
//Stop the progress bar to begin with
progressBar1.MarqueeAnimationSpeed = 0;
//If you wire up the event handler in the Designer, then you don't need
//the following line of code (the designer adds it to InitializeComponent)
//backgroundWorker1.RunWorkerCompleted += backgroundWorker1_RunWorkerCompleted;
}
private void changeDirectoryToolStripMenuItem_Click(object sender, EventArgs e)
{
fbd.RootFolder = Environment.SpecialFolder.MyComputer;
folderPath = "";
if (fbd.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
folderPath = fbd.SelectedPath;
//This line effectively starts the progress bar
progressBar1.MarqueeAnimationSpeed = 10;
bgWorker.RunWorkerAsync(); //Calls the DoWork event
}
}
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
e.Result = N.getList(folderPath); //Technically this is the only work you need to do in the background
}
private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
//these two lines effectively stop the progress bar
progressBar1.Value = 0;
progressBar1.MarqueeAnimationSpeed = 0;
//Now update the list with the result from the work done on the background thread
RefreshList(e.Result as List<String>);
}
private void RefreshList(List<String> results)
{
albumList.DataSource = null; //You don't need this line but there is no real harm.
albumList.DataSource = list;
}
Remember to wire up the RunWorkerCompleted event to backgroundWorker1_RunWorkerCompleted via the Properties bar, Events section in the designer.
To begin with, we start the ProgressBar's animation by setting the MarqueeAnimationSpeed property to a non-zero positive number as part of your successful folder selection.
Then, after calling RunWorkerAsync, the code builds your list in the DoWork method, then assigns the result to the DoWorkEventArgs, which get passed to the RunWorkerCompleted event (which fires when DoWork is finished).
In the backgroundWorker1_RunWorkerCompleted method, we stop the progress bar (and set it's value to zero to effectively return it to it's original state), and then we pass the list to the refreshList method to databind it and populate the ComboBox.
Tested using VS2012, Windows Forms, .Net 4.0 (with a Thread.Sleep to emulate the time taken for N.getList)
*WorkerReportsProgress, and the associated ReportProgress method/event are used when you want to increment the progress bar - you can tell the GUI that you are 10% done, 20% done, 50% done etc etc.
In this case when user click some UIElement I want this element yo be surrounded by dashed border. If there is some other object surrounded then this code removes it first.
Everything is fine but "private void activateElem" fires twice and I have no idea why. Maybe somebody can help, I really have no more ideas.
Anybody knows some ideas to debug issues like this? Maybe there is some way to print out all events queue. There is silverlight spy but I think it doesn't work for windows phone 7.
My code:
public class ManipulationEngine
{
private Canvas sheet;
private static FrameworkElement current_active_element;
public ManipulationEngine(Canvas sheet)
{
this.sheet = sheet;
foreach (FrameworkElement elem in sheet.Children)
{
elem.MouseLeftButtonUp += new MouseButtonEventHandler(activateElem);
}
}
private void activateElem(object sender, MouseButtonEventArgs e)
{
FrameworkElement elem = sender as FrameworkElement;
if (current_active_element != null)
{
desactivateElem();
}
Grid grid = new Grid();
Rectangle recentagle = new Rectangle();
grid.SetValue(Canvas.TopProperty, (double)elem.GetValue(Canvas.TopProperty) - 10);
grid.SetValue(Canvas.LeftProperty, (double)elem.GetValue(Canvas.LeftProperty) - 10);
DoubleCollection stroke = new DoubleCollection();
stroke.Add(4);
stroke.Add(2);
recentagle.StrokeDashArray = stroke;
grid.Children.Add(recentagle);
sheet.Children.Remove(elem);
elem.Margin = new Thickness(10);
grid.Children.Add(elem);
sheet.Children.Add(grid);
current_active_element = elem;
}
private void desactivateElem()
{
if (current_active_element != null)
{
Grid grid = VisualTreeHelper.GetParent(current_active_element) as Grid;
grid.Children.Remove(current_active_element);
sheet.Children.Remove(grid);
current_active_element.SetValue(Canvas.TopProperty, (double)grid.GetValue(Canvas.TopProperty) + 10);
current_active_element.SetValue(Canvas.LeftProperty, (double)grid.GetValue(Canvas.LeftProperty) + 10);
current_active_element.Margin = new Thickness(0);
sheet.Children.Add(current_active_element);
current_active_element = null;
}
}
I'd really advise looking into the Parts and States model. You may be able to do this with a button, or perhaps a radio button.
Usually if you're coding changes to the visual tree, you're not doing it right.
Karen Corby dealt with this very clearly at MIX08, take a look!
http://archive.visitmix.com/blogs/2008Sessions/T20/
Luke
I wrote a very simple newbie app with a 6-sided polyhedron (a "box") which rotates 180 degrees when I click a button. and then rotates back again on the next click. Every rotation grabs another 90MB and it doesn't let go until I close the app. The box is defined in the XAML. The Storyboard, DoubleAnimation and PropertyPath, etc, are all created ONCE, in the constructor. The button code looks like this:
private void button_Storyboard1_Click(object sender, RoutedEventArgs e)
{
GC.Collect();
if (_bFront)
{
_myDoubleAnimation.From = 0;
_myDoubleAnimation.To = 180;
_bFront = false;
}
else
{
_myDoubleAnimation.From = 180;
_myDoubleAnimation.To = 0;
_bFront = true;
}
_myDoubleAnimation.Duration = _Duration;
Storyboard.SetTargetName(_myDoubleAnimation, "rotate_me");
Storyboard.SetTargetProperty(_myDoubleAnimation, _PropP);
_sb.Children.Add(_myDoubleAnimation);
_sb.Begin(this.viewport3D1);
}
After a few rotations I'm out of memory! What's going on?
Could be totally wrong here, but aren't you adding _myDoubleAnimation to _sb.Children on each click, instead of just updating it?