I'm trying to program a matching game. My idea is:
(1). When a certain pictureBox1 is clicked, it becomes invisible
(2). A MessageBox shows up, prompting "Pick another box."
(3). Finally, I need to program an if/else statement where if pictureBox13 is clicked it becomes invisible; else, (if another pictureBox is clicked) a MessageBox prompts "Try again." And both picture boxes become invisible, but I don't know what I am doing wrong:
// Program From Below
private void pictureBox1_Click(object sender, EventArgs e)
{
MessageBox.Show("Now Pick Another Hidden Picture!");
pictureBox1.Visible = false;
if (pictureBox13_Click)
{
MessageBox.Show("Great!");
pictureBox13.Visible = false;
}
else
{
MessageBox.Show("Try Again!");
}
}
There is a red squiggly line under if (pictureBox13_Click)
It would be better if every PictureBox had it's a state, that you would then manipulate using a Click_Event. Microsoft has a comprehensive tutorial for a matching game here: https://msdn.microsoft.com/en-us/library/dd553235.aspx
As other suggested, you can use same event handler for all your pictureBoxes and cast sender to PictureBox to see what PB was clicked :
List<string> selectedPictureBoxes;
public MyForm() // ctor
{
selectedPictureBoxes = new List<string>();
foreach(Control c in this.Controls)
if(c is PictureBox) c.Click += pictureBox_Click;
}
private void pictureBox_Click(object sender, EventArgs e)
{
PictureBox _clicked = sender as PictureBox;
if(!selectedPictureBoxes.Contains(_clicked.Name))
selectedPictureBoxes.Add(_clicked.Name);
else ....
}
You could create an int for the selected boxes (in this example, box1 and box2) which are both set to 0 and then create an on click event which sets the int to the clicked box.
if(box1 != 0)
{
box2 = 'insert selected box number'
}
else
{
box1 = 'insert selected box number'
}
After two boxes have been selected, both integers can be set to false, this allows for you to use a switch instead of if, which could shorten the code substantially if a separate if statement is required for each pair of pictures.
Related
I have a ContextMenuStrip with a ToolStripButtonMenu "Print".
A MDI child form is open containing a DataGridView. I am doing a validation to an editable column "Copies" in that grid. I don't want the user to input letters for example. The validation is working fine when leaving the cell but if I am clicking on a control such as the "Print" button, the validation is not caused.
The following screen shot shows how I can click on the "Print" button while the Copies cell contains letters:
// The code for the cell validation
private void QuantitiesDataGridView_CellValidating(object sender, DataGridViewCellValidatingEventArgs e)
{
if (e.ColumnIndex == QuantitiesDataGridView.Columns[COL_COPIES].Index)
{
QuantitiesDataGridView.Rows[e.RowIndex].ErrorText = "";
int enteredValue;
if (!int.TryParse(e.FormattedValue.ToString(), out enteredValue) || enteredValue < 1)
{
e.Cancel = true;
QuantitiesDataGridView.Rows[e.RowIndex].ErrorText = "Invalid number of copies";
}
}
}
I was looking for a property of the ToolStripButtonMenu such as CauseValidation but there is not such one.
Is there a way to trigger the validation when clicking on one of the ToolStripButtonMenu so the Print button will not be triggered until the Copies value is valid?
In your ToolStripButton's Click method, try calling the active form's ValidateChildren function:
private void toolStripButton1_Click(object sender, EventArgs e) {
if (this.ActiveMdiChild.ValidateChildren()) {
// do your processing ...
}
}
I have the code below.
public void WepaonEquip(Object sender, System.EventArgs e)
{
if (button[0].BackColor == Color.Beige)
{
button[0].BackColor = Color.OrangeRed;
}
else if (button[1].BackColor == Color.Beige)
{
button[1].BackColor = Color.OrangeRed;
}
else if (button[2].BackColor == Color.Beige)
{
button[2].BackColor = Color.OrangeRed;
}
}
The code in the class containing this chunk of code generates a button array. What I want is that the user will click a button and the colour of the button clicked will change.
However, when the user clicks, lets say, the 3rd button, the first button in the array changes colour, not the one clicked. Any idea as to why this isn't working? I believe the logic of the code works, perhaps I'm missing something.
Set each button in the panel to use the same Click Event handler. In the handler cast sender as a button and change the color
Assuming that WeaponEquip is the click event handler for the buttons it would look something like this:
public void WepaonEquip(Object sender, System.EventArgs e)
{
Button clickedbutton = (Button)sender
clickedbutton.BackColor = Color.OrangeRed;
}
I am attempting to change a listview item's background colour when a mouse hovers over it
I have a mouse hover event, but how can I add a "highlight" effect upon a mouse hovering over the item?
private void pinnedAppsListBox_MouseHover(object sender, EventArgs e)
{
}
Use this:
private void pinnedAppsListBox_MouseHover(object sender, EventArgs e){
Point point = pinnedAppsListBox.PointToClient(Cursor.Position);
int index = pinnedAppsListBox.IndexFromPoint(point);
if (index < 0) return;
//Do any action with the item
pinnedAppsListBox.GetItemRectangle(index).Inflate(1,2);
}
Go to the ListView's ItemMouseHover event and add then set the property "BackColor" of the Item.
private void listView1_ItemMouseHover(object sender, ListViewItemMouseHoverEventArgs e)
{
e.Item.BackColor = Color.Black;
}
Declare this Global variable
Use this Listview Item variable to keep track of what item was hovered on
ListViewItem lvHoveredItem;
Set the following function to turn on DoubleBuffering for your control to prevent flickering:
public static void SetDoubleBuffering(System.Windows.Forms.Control control, bool value)
{
System.Reflection.PropertyInfo controlProperty = typeof(System.Windows.Forms.Control)
.GetProperty("DoubleBuffered", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance);
controlProperty.SetValue(control, value, null);
}
Where your control is loaded call this function
SetDoubleBuffering(lvTaskList, true);
Then use this code in the mousemove event of your listview
private void lvTaskList_MouseMove(object sender, MouseEventArgs e)
{
//Set the Color you want the list Item to be when mouse is over
Color oItemColor = Color.Lavender;
Color oOriginalColor = Color.blue; //Your original color
//get the Item the Mouse is currently hover
ListViewItem lvCurrentItem = lvTaskList.GetItemAt(e.X, e.Y);
if ((lvCurrentItem != null) && (lvCurrentItem != lvHoveredItem))
{
lvCurrentItem.BackColor = oItemColor;
if(lvHoveredItem != null)
{
lvHoveredItem.BackColor = oOriginalColor ;
}
lvHoveredItem = lvCurrentItem;
return;
}
if (lvCurrentItem == null)
{
if (lvHoveredItem != null)
{
lvHoveredItem.BackColor = oOriginalColor;
}
}
}
You can also add the MouseLeave Event
private void lvTaskList_MouseLeave(object sender, EventArgs e)
{
Color oOriginalColor = Color.Blue; //Your original color
//When the mouse leave the control. If a ListViewItem was highlighted then set it's original color back
if (lvHoveredItem != null)
{
lvHoveredItem.BackColor = oOriginalColor ;
}
lvHoveredItem = null;
}
If you're using a ListBox, it is quite more difficult to handle, you will need to set a MouseHover event for the ListBox and determine which item is being hovered on and then draw it manually.
See this answer.
However if you're using a ListView, you can easily add an ItemMouseHover event like this:
private void pinnedAppsListView_MouseHover(object sender, EventArgs e)
{
e.Item.BackColor = Color.Lime;
}
I have seen this question many times without a good answer.
There is no good answer that I know, but, I did it, using some hints elsewhere.
I did this using Lazarus, but you should be able to adapt it to your language.
Get the item. You may want to set variables to catch these individually.
You may also want to get the state of your mouse buttons at mousedown first.
If (ListView.GetItemAt(X,Y) <> nil) then // do this with an if else
// Next, you can get the bounding rect:
ListView.GetItemAt(X,Y).DisplayRect(drSelectBounds);
//Option: If Button up or down then
// you may have to catch this elsewhere, such as for a drag operation.
// Create and set a boolean variable:
HighLightOn := True;
ListView.Repaint; // clears previous hightlights
ListView.Canvas.Brush.Color := clBtnFace; // or your color of choice
ListView.Canvas.FillRect(Rect);
// If you are moving around in an area where GetItem is nil,
// then do this to stop flicker and remove the highlight:
If (ListView.GetItemAt(X,Y) = nil) // do this with an if else
If HighLightOn then
begin
SelectedList.Repaint;
HighLightOn := False;
end;
// If a highlight gets left behind,
// you may need to repeat this elsewhere, such as in a component exit.
// This is the basic gist of the issue.
// There can be a lot of options or things to look for,
// so you code could get more complicated.
// I am not suggesting this is the best way to implement it,
// but it is easy. Part of this code only works inside your app!
I need to determine if the value of a NumericUpDown control was changed by a mouseUp event.
I need to call an expensive function when the value of a numericupdown has changed. I can't just use "ValueChanged", I need to use MouseUp and KeyUp events.
Basically, I need to know:
Did the value of the numericUpDown change when the user let go of the
mouse? If any area which is not highlighted in red is clicked, the
answer is no. I need to IGNORE the mouse up event, when ANYWHERE but the red area is clicked.
How can I determine this by code? I find events a little confusing.
This will fire when the user releases the mouse button. You might want to investigate which mousebutton was released.
EDIT
decimal numvalue = 0;
private void numericUpDown1_MouseUp(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left && numvalue != numericUpDown1.Value)
{
//expensive routines
MessageBox.Show(numericUpDown1.Value.ToString());
}
numvalue = numericUpDown1.Value;
}
EDIT 2
This will determine if the left mousebutton is still down, if it is exit before performing expensive routine, doesn't help with keyboard button down.
private void numericUpDown1_ValueChanged(object sender, EventArgs e)
{
if ((Control.MouseButtons & MouseButtons.Left) == MouseButtons.Left)
{
return;
}
//expensive routines
}
Edit 3
How to detect the currently pressed key?
Will help solve the Any key down, Though I think the only ones that matter are the arrow keys
Problem - I need to IGNORE the mouse up event, when ANYWHERE but the red area is clicked.
Derive a custom numeric control as shown below. Get the TextArea of the Numeric Control and ignore the KeyUp.
class UpDownLabel : NumericUpDown
{
private Label mLabel;
private TextBox mBox;
public UpDownLabel()
{
mBox = this.Controls[1] as TextBox;
mBox.Enabled = false;
mLabel = new Label();
mLabel.Location = mBox.Location;
mLabel.Size = mBox.Size;
this.Controls.Add(mLabel);
mLabel.BringToFront();
mLabel.MouseUp += new MouseEventHandler(mLabel_MouseUp);
}
// ignore the KeyUp event in the textarea
void mLabel_MouseUp(object sender, MouseEventArgs e)
{
return;
}
protected override void UpdateEditText()
{
base.UpdateEditText();
if (mLabel != null) mLabel.Text = mBox.Text;
}
}
In the MainForm, update your designer with this control i.e. UpDownLabel:-
private void numericUpDown1_MouseUp(object sender, MouseEventArgs e)
{
MessageBox.Show("From Up/Down");
}
Referred from - https://stackoverflow.com/a/4059473/763026 & handled the MouseUp event.
Now, use this control instead of the standard one and hook on the
KeyUp event. You will always get the KeyUp event from the Up/Down button only i.e. RED AREA when you click the
spinner [Up/Down button, which is again a different control derived
from UpDownBase].
I think you should use Leave event that when the focus of NumericUpDown control gone, it would called.
int x = 0;
private void numericUpDown1_Leave(object sender, EventArgs e)
{
x++;
label1.Text = x.ToString();
}
Currently, my application displays 6 picture boxes, each displaying an picture which is being constantly updating.
Now, I want upon clicking any picture box that picture box extends and fill up the whole screen just showing that chosen picture box.
Is this possible? Must i create another form to do this?
Thanks In Advance,
Perumal
in the onclick event for each the picture box (they can all point to this same method)
picturebox_Click(object sender .....)
{
PictureBox pb= (PictureBox)sender;
if (pb.dock==DockStyle.None)
{
pb.dock=DockStyle.Fill;
pb.BringToFront();
}
else
pb.dock=DockStyle.None;
}
Not seeing any code, here is how you can programmatically change a picture box on click.
pictureBox1.Dock = DockStyle.Fill
So you need to create a on click event handler and call your picture box's Dock function like the above.
update in response to comments
There is a DockStyle.None to revert the picture back to original size.
If i understand you correctly, you want to have 6 pictures and then when you click one it fills, click again, shrinks, click another one, fills etc etc...
To do this, you would use the Dock and Visible properties on the picture boxes. Now it also seems as if you are asking how to actually write the code. Well if you show some code, I could give pointers, with nothing to go on the way I'd approach it is to:
Put all your picture boxes in a list and assign a state to them Big or Small.
Write a OnClick for each picture box to change the state of the picture box clicked on.
Each OnClick then calls a helper function that iterates through each picture box in the list and hides the small one and DockStyle.Fill the big one.
Does the above algorithm accomplish what you need?
try something like this. the code is not re factored but I am sure you can do that
private bool isfill = false;
private void pictureBox1_Click(object sender, EventArgs e)
{
if (!isfill)
{
pictureBox1.Dock = DockStyle.Fill;
pictureBox2.Visible = false;
isfill = true;
}
else
{
pictureBox1.Dock = DockStyle.None;
pictureBox2.Visible = true;
isfill = false;
}
}
private void pictureBox2_Click(object sender, EventArgs e)
{
if (!isfill)
{
pictureBox2.Dock = DockStyle.Fill;
isfill = true;
pictureBox1.Visible = false;
}
else
{
pictureBox2.Dock = DockStyle.None;
isfill = false;
pictureBox1.Visible = true;
}