My Windows Forms code has two superposed PictureBoxes: a small X on the top corner of a user-loaded image. I'll call them DelImage and Image, respectively. Like this:
http://imgur.com/fsW7R8i
The DelImage appears (Visible = true) on Image_MouseEnter and disappears on Image_MouseLeave. Now, I want the DelImage to have a custom behavior as well when the mouse enters it, but DelImage never fires events (nor MouseEnter, nor MouseLeave, nor Click). I've tried bringing it to front, but it already is in front of the Image.
Here's some code:
private void picImage_MouseEnter(object sender, EventArgs e)
{
delImage.Visible = true;
}
private void picImage_MouseLeave(object sender, EventArgs e)
{
delImage.Visible = false;
}
private void picDelImage_MouseEnter(object sender, EventArgs e)
{
delImage.Visible = true;
this.Cursor = Cursors.Hand;
}
private void picDelImage_MouseLeave(object sender, EventArgs e)
{
this.Cursor = Cursors.Arrow;
}
private void picDelImage_Click(object sender, EventArgs e)
{
Panel currentPanel = this.tlpImages.Controls["pnlImage"] as Panel;
currentPanel.Visible = false;
}
With this code, the picDelImage events are never reached. I never enter DelImage, apparently because I never leave Image. What can I do to make my PictureBoxes have the expected behavior?
Related
I am doing a simple drag and drop operation in windows forms. Whenever I start the operation the cursor changes shape. I know this is directly related to the DragDropEffects and I can't find an option that results in the default cursor. Can anybody help? Here is the code:
a.MouseDown += new MouseEventHandler(ButtonDown);
a.DragEnter += new DragEventHandler(ButtonDragEnter);
a.AllowDrop = true;
and here are the functions:
private void ButtonDown(object sender, EventArgs e)
{
PictureBox p = (PictureBox)sender;
ButtonClick(sender, e);
p.DoDragDrop(p.BackColor, DragDropEffects.All);
}
private void ButtonDragEnter(object sender, DragEventArgs e)
{
e.Data.GetFormats();
e.Effect = DragDropEffects.None;
Color c = new Color();
c = (Color) e.Data.GetData(c.GetType());
ButtonClick(sender, e,c);
}
Ok answered my own question here:
You first need to add an event to giveFeedBack:
a.GiveFeedback += new GiveFeedbackEventHandler(DragSource_GiveFeedback);
and here is the feedback function:
private void DragSource_GiveFeedback(object sender, GiveFeedbackEventArgs e)
{
e.UseDefaultCursors = false;
}
I want to hide the cursor after a certain time (if the mouse is not moving), and I want to show the cursor when I move the mouse in a picturebox. I just can't get it to work... This is what I have tried:
// this Never seem to hide the cursor
private void picBox_MouseMove(object sender, MouseEventArgs e)
{
Cursor.Show();
tim.Stop();
tim.Start();
}
private void tim_Tick(object sender, EventArgs e)
{
Cursor.Hide();
tim.Stop();
}
-
// works but in this case I want cursor.ico to be a resource
private void picBox_MouseMove(object sender, MouseEventArgs e)
{
Cursor.Current = Cursors.Default;
tim.Stop();
tim.Start();
}
private void tim_Tick(object sender, EventArgs e)
{
Cursor.Current = new Cursor("cursor.ico");
tim.Stop();
}
-
// Properties.Resources.cursor gives an error even though I added it to my resources
// cannot convert from 'System.Drawing.Icon' to 'System.IntPtr'
private void picBox_MouseMove(object sender, MouseEventArgs e)
{
Cursor.Current = Cursors.Default;
tim.Stop();
tim.Start();
}
private void tim_Tick(object sender, EventArgs e)
{
Cursor.Current = new Cursor(Properties.Resources.cursor);
tim.Stop();
}
You need to have a timer and handle its Tick event. In the Tick event, check if the last movement of the mouse was before the certain time, then hide the cursor using Cursor.Hide(). Also handle MouseMove of the PictureBox and show the cursor using Cursor.Show() method.
Note: Don't forget to enable the timer and set Interval of timer to a short value, for example 300 and change duration value in the following code, for a shorter/longer inactive time:
DateTime? lastMovement;
bool hidden = false;
int duration = 2;
void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
lastMovement = DateTime.Now;
if (hidden)
{
Cursor.Show();
hidden = false;
}
}
private void timer1_Tick(object sender, EventArgs e)
{
if (!lastMovement.HasValue)
return;
TimeSpan elaped = DateTime.Now - lastMovement.Value;
if (elaped >= TimeSpan.FromSeconds(duration) && !hidden)
{
Cursor.Hide();
hidden = true;
}
}
I think this is a stupid question, but I don't understand what is happening here.
I use this code:
private void pictureBox1_MouseHover(object sender, EventArgs e)
{
pictureBox1.Visible = false;
pictureBox1.BackColor = Color.Black;
}
private void pictureBox1_MouseLeave(object sender, EventArgs e)
{
pictureBox1.Visible = true;
}
The problem is: The picturebox changes color to black if mouse is over picturebox, but the visibility doesn't change. Why?
I think your problem is as soon as you hover the picture it really disappears (that's why you see the back color turn to black, the event is firing). However the picture disappears which lead to situation where your mouse is not on the picture anymore, therefore Mouse_Leave event firing.
You can use MouseEnter event instead of MouseHover and bool field isHover that you can use in attempt to reduce flickering :
public partial class Form1: Form
{
bool isHover = false;
private void pictureBox1_MouseEnter(object sender, EventArgs e)
{
if(isHover) return;
// with MouseHover this control visibility appears to be locked with MouseEnter it is not
pictureBox2.Visible = false;
pictureBox2.BackColor = Color.Black;
}
private void pictureBox1_MouseLeave(object sender, EventArgs e)
{
if(!isHover) return;
isHover = false;
pictureBox2.Visible = true;
}
...
}
How can I change a button's style, in particular the image, upon the mouse being pressed and held and then the cursor dragged away from the button?
You'll notice that, on this action, the default behaviour for the button is to revert it's style to hover style. This can be partially configured using the MouseOverBackColor. I want to ensure that, whenever the MouseOverBackColor is applied, I also have a specific image on the button.
I have tried the code below, to have an "isMouseDown" flag which is checked in the leave event. However, this doesn't work for me.
private void btnFormMinimize_MouseClick(object sender, MouseEventArgs e)
{
this.WindowState = FormWindowState.Minimized;
}
bool isMouseDown = false;
private void btnFormMinimize_MouseDown(object sender, MouseEventArgs e)
{
Button b = (Button)sender;
b.Image = Properties.Resources.icon_minimize_click;
isMouseDown = true;
}
private void btnFormMinimize_MouseEnter(object sender, EventArgs e)
{
Button b = (Button)sender;
b.Image = Properties.Resources.icon_minimize_hover;
}
private void btnFormMinimize_MouseLeave(object sender, EventArgs e)
{
Button b = (Button)sender;
if (isMouseDown)
{
b.Image = Properties.Resources.icon_minimize_hover;
}
else
{
b.Image = Properties.Resources.icon_minimize;
}
}
private void btnFormMinimize_MouseUp(object sender, MouseEventArgs e)
{
isMouseDown= false;
}
Thanks in advance.
Basically in the code below where i highlight, i would like to know how to use drawBricks method in the timer tick when that button(btnDisplayBricks) is pressed. Because i am using a timer tick and picturebox for paper drawings etc i cannot just simply call the method from within the button click event because the paper then clears in the timer only allowing me to display the bricks before timer1 starts any ideas.
private void timer1_Tick(object sender, EventArgs e)
{
paper.Clear(Color.LightSteelBlue);
DrawBall();
MoveBall();
DrawBat(paper);
if (btnDisplayBricks_Click[0] = true) ///code here problem
//then call method
DrawBricks(paper);
private void btnDisplayBricks_Click(object sender, EventArgs e)
{
DrawBricks(paper);
}
}
}
problem is in your equation, you should use == instead of =
if (btnDisplayBricks_Click[0] == true)
also move methodbtnDisplayBricks_Click outside of timer1_Tick
private bool buttonClicked = false;
private void timer1_Tick(object sender, EventArgs e)
{
paper.Clear(Color.LightSteelBlue);
DrawBall();
MoveBall();
DrawBat(paper);
if (buttonClicked)
{
DrawBricks(paper);
// maybe you want to set buttonclicked to false again, but specs are not clear to me
// buttonClicked = false;
}
}
private void btnDisplayBricks_Click(object sender, EventArgs e)
{
DrawBricks(paper);
buttonClicked = true;
}