I am making little Windows Forms Application.
I have PictureBox (parent) and Label (child) in it.
The Parent's Mouse Events are working perfectly, but Mouse events generated by child elements are not reflected on the Parent. The Cursor also changes back to its default (arrow).
Is it possible to pass events generated by child Controls, e.g., the MouseEnter event, to the Parent Control?
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
Card.MouseEnter += new EventHandler(Card_MouseEnter);
Card.MouseLeave += new EventHandler(Card_MouseLeave);
Card.MouseDown += new MouseEventHandler(this.Card_MouseDown);
Card.MouseUp += new MouseEventHandler(this.Card_MouseUp);
}
void Card_MouseLeave(object sender, EventArgs e)
{
this.Card.BackgroundImage = ((System.Drawing.Image)(Properties.Resources.card_bg));
this.Rename("Running!");
}
void Card_MouseEnter(object sender, EventArgs e)
{
this.Card.BackgroundImage = ((System.Drawing.Image)(Properties.Resources.card_hover_bg));
}
private void Card_MouseDown(object sender, EventArgs e)
{
this.Card.BackgroundImage = ((System.Drawing.Image)(Properties.Resources.card_click_bg));
}
private void Card_MouseUp(object sender, EventArgs e)
{
this.Card.BackgroundImage = ((System.Drawing.Image)(Properties.Resources.card_hover_bg));
this.Rename("Please Wait...");
}
private void CardName_MouseDown(object sender, MouseEventArgs e)
{
}
void Rename(string args)
{
this.CardName.Text = args;
}
private void CardName_Click(object sender, EventArgs e)
{
}
}
This is what I have This is what I want to achieve
The first animation represents what I have now, the second is what I need to achieve :)
When I'm making pictureBox1.Controls.Add(label1) label1 is
disappearing and I tried bring to front and change color but couldn't
do it. Please if you will have any idea show me in provided code by me
to be understandable for me. Thank you all again and again :)
You'd use code like this, maybe in the Load() event of the Form:
private void Form1_Load(object sender, EventArgs e)
{
Point pt = CardName.Parent.PointToScreen(CardName.Location);
Card.Controls.Add(CardName);
CardName.Location = Card.PointToClient(pt);
}
This keeps the label in the same position as it was, but makes the picturebox the parent.
Not sure where you're going wrong. Here's an example showing it in action. Both the PictureBox (Card) and Label (CardName) are inside a Panel (panel1). Clicking on button2 toggles the visibility of the Card. Clicking on button1 makes Card the Parent of CardName. You can see that at first, only the Card toggles visibility, but after clicking on button1 and setting the Parent, both toggle visibility together since CardName is a Child of Card (it also changes its BackColor to match that of its new Parent):
Code:
public partial class Form1 : Form
{
private void button1_Click(object sender, EventArgs e)
{
Point pt = CardName.Parent.PointToScreen(CardName.Location);
Card.Controls.Add(CardName);
CardName.Location = Card.PointToClient(pt);
}
private void button2_Click(object sender, EventArgs e)
{
Card.Visible = !Card.Visible;
}
}
When I move mouse over label, panel thinks mouse left it and rises
MouseLeave event
Here is how you can tell if the cursor has actually left the BOUNDS of the Panel, as opposed to simply enter a child control within the Panel:
private void panel1_MouseEnter(object sender, EventArgs e)
{
panel1.BackColor = Color.Red;
}
private void panel1_MouseLeave(object sender, EventArgs e)
{
Point pt = panel1.PointToClient(Cursor.Position);
if (!panel1.ClientRectangle.Contains(pt))
{
// we only get in here when the cursor leaves the BOUNDS of panel1
panel1.BackColor = Control.DefaultBackColor;
}
}
First of all, you should build a UserControl as a container for all your objects: it'd make everything simpler (the one I'm using here is actually a UserControl, modified to comply with your current setup).
When a Control other than the PictureBox is interacted with, you can decide whether you want to trigger a similar action on the main Control or perform a different action based on what event has been generated.
▶ When the Mouse Pointer enters you assembled Control, you want to change the default Cursor: then, when one of the Labels raises the Enter event, call the method of the main Control that handles this. An event handler is a method, you can call it.
▶ When a Label is clicked, you don't want to trigger the related action of the main Control: in this case, there's nothing to do, just handle this event and perform the required action.
▶ The Label should be child of the main Control. You're using a PictureBox, which is not a ContainerControl. You can add child controls to it anyway. You need to do this in code, since - as mentioned - the PictureBox is not designed to host Controls, thus you cannot drop one inside it: the Control you drop will be parented with the Container that hosts the PictureBox (your Form, here).
When you set the parent in code, you need to remember that the Location of the child control is relative to the old Parent, so you have to re-define it's position.
E.g: PictureBox.Bounds = (100, 100, 100, 200) / Label.Bounds = (100, 250, 100, 50)
When the PictureBox becomes Parent of your Label, the Label.Location is still (100, 250): so, now, it will be hidden, since it's outside the visible bounds of its new Parent. You have to reposition it in relation to the new host: its new Location should be (0, 150), to keep the previous relative position.
PictureBox.Control.Add(Label);
//[...]
Label.Location = new Point(Label.Left - PictureBox.Left, Label.Top - PictureBox.Top);
=> Label.Location = (100 - 100, 250 - 100) => (0, 150)
Or, centered horizontally:
Label.Location = new Point((PictureBox.Width - Label.Width) / 2, Label.Top - PictureBox.Top);
=> Label.Location = ((100 - 100) / 2, 250 - 100) => (0, 150) // <- Since both have the same Width
Or, using positions relative to the Screen:
var p = Label.PointToScreen(Point.Empty); // Relative to the ClientRectangle (Top/Left = (0, 0))
PictureBox.Controls.Add(Label);
Label.Location = PictureBox.PointToClient(p);
In any case, call BringToFront() after, to ensure that the new child Control is brought on top and anchor the Control, so it will keep its position and its Width will be bound to the Parent Width:
Label.BringToFront();
Label.Anchor = AnchorStyles.Left | AnchorStyles.Bottom | AnchorStyles.Right;
Now, assuming you want to change the Cursor to Cursors.Hand when the Mouse enters your combined Control and reset to default when it leaves it:
▶ You want the Cursor to change shape in any case.
▶ You want to generate different actions when the PictureBox is clicked and when one of the Labels is clicked.
▶ Both Labels can have distinct actions when clicked.
→ In the visual sample, the Label above the PictureBox is named lblTitle, the Label inside the PictureBox, at the bottom, is named lblFooter.
→ The PictureBox is named ImageView.
Setup the handlers:
NOTE: With a UserControl, the events handling, e.g., in relation to MouseEnter, changes in:
// The Parent's MouseEnter calls OnMouseEnter
protected override void OnMouseEnter(EventArgs e)
{
base.OnMouseEnter(e);
this.Cursor = Cursors.Hand;
}
// Child Controls just call the same method
private void Labels_MouseEnter(object sender, EventArgs e) => OnMouseEnter(e);
public Form1()
{
InitializeComponent();
Point p = lblFooter.PointToScreen(Point.Empty);
ImageView.Controls.Add(lblFooter);
lblFooter.Location = ImageView.PointToClient(p);
ImageView_MouseEnter += ImageView_MouseEnter;
ImageView_MouseLeave += ImageView_MouseLeave;
// Not added in the code here, do whatever is needed with this handler
ImageView_Click += ImageView_Click;
lblFooter.MouseEnter += Labels_MouseEnter;
lblFooter.MouseLeave += Labels_MouseLeave;
lblFooter.MouseClick += lblFooter_MouseClick;
lblTitle.MouseEnter += Labels_MouseEnter;
lblTitle.MouseLeave += Labels_MouseLeave;
lblTitle.MouseDown += lblTitle_MouseDown;
lblTitle.MouseUp += lblTitle_MouseUp;
}
private void ImageView_MouseEnter(object sender, EventArgs e) => this.Cursor = Cursors.Hand;
private void ImageView_MouseLeave(object sender, EventArgs e) => this.Cursor = Cursors.Default;
private void Labels_MouseEnter(object sender, EventArgs e)
{
ImageView_MouseEnter(ImageView, e);
// [...]
// Do stuff related to the Labels Enter event
}
private void Labels_MouseLeave(object sender, EventArgs e) {
ImageView_MouseLeave(ImageView, e);
}
private void lblTitle_MouseDown(object sender, MouseEventArgs e) {
// Perform actions when the Mouse button is held down lblTitle
}
private void lblTitle_MouseUp(object sender, MouseEventArgs e) {
// Perform actions when the Mouse button is released
}
private void lblFooter_MouseClick(object sender, MouseEventArgs e) {
// Perform actions on a Mouse Click event on lblFooter
}
I am having a web browser control in a winform. In order to show the web content completely (without scroll bars), I need to get the size of the web content in DocumentComplete event. And then resize(refresh) the winform.
void wbControl_DocumentCompleted(object sender, System.Windows.Forms.WebBrowserDocumentCompletedEventArgs e)
{
wbControl.Height = wbControl.Document.Window.Size.Height;
wbControl.Width = wbControl.Document.Window.Size.Width;
}
But, Its not getting set from here. Old values remains the same.
If Document.Window.Size does not do the trick, Document.Body.ScrollRectangle will usually work for you.
I added some width and height when resizing the form because of the borders of the form, when resizing only the control itself this is not something you have to do.
private void webBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e)
{
//If dockstyle = fill
this.Width = webBrowser.Document.Body.ScrollRectangle.Width + 40;//Border
this.Height = webBrowser.Document.Body.ScrollRectangle.Height + 40;//Border
//If the control is not docked
webBrowser.Size = webBrowser.Document.Body.ScrollRectangle.Size;
}
c# winforms here. I need to draw an invisible rectangle area over a panel and catch his mouse enter/leave events.
My situation (as for some other suggestions you may have):
I have a media player (the panel), on mouse enter event I make visible a little navigation menu (it's located over the panel). I want to hide the nav menu on mouse leave from the panel. This works but unfortunately also entering the nav menu make it invisible. Many thanks.
On mouse leave, simply see if the current Cursor.Position is contained by your rectangle. For example, using a panel and a label:
public Form1()
{
InitializeComponent();
panel1.MouseEnter += panel1_MouseEnter;
panel1.MouseLeave += common_MouseLeave;
label1.MouseLeave += common_MouseLeave;
}
private void panel1_MouseEnter(object sender, EventArgs e)
{
label1.Visible = true;
}
private void common_MouseLeave(object sender, EventArgs e)
{
Rectangle rc = panel1.RectangleToScreen(panel1.ClientRectangle);
if (!rc.Contains(Cursor.Position))
{
label1.Visible = false;
}
}
I have a winform application which contains a window resizable but one requirement is all UI items in the window should be resized according to size of the window. How can I achieve that?
Set the anchor properties on your controls. For example, if you set a control to anchor left and right, it's width will change as it's parent resizes. Same with top and bottom. Note, however, it will not resize, for example, the text inside a control.
I will give an example with a Winform named Simulator:
partial class Simulator
{
int oldWidth, oldWeight;
...
private void InitializeComponent()
{
... (generated initialization code)
this.ResizeBegin += new System.EventHandler(Simulator_ResizeBegin);
this.ResizeEnd += new System.EventHandler(Simulator_ResizeEnd);
}
void Simulator_ResizeEnd(object sender, System.EventArgs e)
{
this.oldWidth = this.Width;
this.oldHeight = this.Height;
}
void Simulator_ResizeBegin(object sender, System.EventArgs e)
{
int wider = this.Width - this.oldWidth;
int higher = this.Height - this.oldHeight;
// Change size of UI elements.
}
}
my program has a picturebox, and I want, apon a mouse click, or on ContextMenuStrip choice, to make something appear at the same spot of the click.
as seen in the picture, i would like to add some kind of a note on the specific clicked date area (probably add a user control)
How do i go at it ? how can i send the click cordinates (x,y) and make something appear at these same coordinates ?
Thanks !
I would create a class which would provide menu items and capture x,y coordinates to have them ready when the item is clicked. Or you can capture these coordinates in an anonymous delegate.
Something like this:
public Form1()
{
InitializeComponent();
MouseClick += new MouseEventHandler(Form1_MouseClick);
}
private void Form1_MouseClick (object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Right)
{
ContextMenuStrip ctxMenu = new ContextMenuStrip();
// following line creates an anonymous delegate
// and captures the "e" MouseEventArgs from
// this method
ctxMenu.Items.Add(new ToolStripMenuItem(
"Insert info", null, (s, args) => InsertInfoPoint(e.Location)));
ctxMenu.Show(this, e.Location);
}
}
private void InsertInfoPoint(Point location)
{
// insert actual "info point"
Label lbl = new Label()
{
Text = "new label",
BorderStyle = BorderStyle.FixedSingle,
Left = location.X, Top = location.Y
};
this.Controls.Add(lbl);
}
An sample code for your requirement, In my below code i am adding button control on mouse click. You can modify the code as per ur need.
int xValue=0, yValue=0;
private void Form1_MouseClick(object sender, MouseEventArgs e)
{
xValue = e.X;
yValue = e.Y;
Button btn = new Button();
btn.Name = "Sample Button";
this.Controls.Add(btn);
btn.Location = new Point(xValue, yValue);
}
you can use either tool tip or use mousemove event. this event will provide you current xy postion of mouse and then you can show your content by either visible true/false at that place or take a label and set its text and then set its xy position according to xy of mouse. and then on mouseleave event move that label to off screen or hide