Develop Reference

MouseWheel of parent panel - Pass event from child

I have a Custom panel which contains 4 labels (in example pasted, I have erased definition of those 2 I didn't used).
This custom panel is added to a panel dynamically, as many records I have in an array.
The parent panel, has the Horizontal scroll enabled = false, as I should scroll only vertically.
Everything works fine, as I can use mouse on vertical scrollbar and I can scroll the panel container. But when I want to use mouse wheel to scroll all the custom panels (child objects) it does not do anything.
I have tried many of the solutions that works for other on this site, but none of them works for me and I don't know why.
I read about the panel has to have focus to be able to scroll, and I will have to pass the OnMouseWheel event to parent, in child. But I am not able to do it, I don't know how to do it.
my custom panel (child):
public class PlaylistRecords : Panel
{
public Label lblRecordNumber { get; private set; }
private Label lblRecordName;
public static int RecordNumber { get; set; }
public static String RecordName { get; set; }
public PlaylistRecords(
int RecordNumber,
String RecordName
)
{
InitializeComponent();
this.Size = new System.Drawing.Size(800,50);
this.BackColor = System.Drawing.Color.FromArgb(20,20,20);
PlaylistRecords.RecordNumber = RecordNumber;
PlaylistRecords.RecordName = RecordName;
this.lblRecordNumber.Text = PlaylistRecords.RecordNumber.ToString()+".";
this.lblRecordName.Text = PlaylistRecords.RecordName;
this.lblRecordNumber.Location = new System.Drawing.Point(2, (int)(this.Height - this.lblRecordNumber.Height) / 2);
this.lblRecordName.Location = new System.Drawing.Point(
this.lblRecordNumber.Location.X+ this.lblRecordNumber.Width+2,
(int)(this.Height - this.lblRecordName.Height) / 2);
}
private void InitializeComponent()
{
this.lblRecordNumber = new myLabel();
this.lblRecordName = new myLabel();
this.lblRegistPath = new myLabel();
this.SuspendLayout();
//
// lblRecordNumber
//
this.lblRecordNumber.Name = "lblRecordNumber";
this.lblRecordNumber.Size = new System.Drawing.Size(50, 23);
//
// lblRecordName
//
this.lblRecordName.Name = "lblRecordName";
this.lblRecordName.Size = new System.Drawing.Size(150, 23);
//
// PlaylistRecords
//
this.Controls.Add(this.lblRecordNumber);
this.Controls.Add(this.lblRecordName);
this.ResumeLayout(false);
}
}

this.SetStyle(ControlStyles.Selectable, true);
this.TabStop = true;
These two lines of code written in constructor of child control (panel) is doing the job.
Thank you #Hans Passant for your comment. :)

Well if a control is not accepting events then they would be passed to parent
lblRecordNumber.Enabled = false;
lblRecordName.Enabled = false;
alternatively you can pass the scroll event to containing control referred to as Parent
internal class myLabel : Label
{
const int WM_MOUSEWHEEL = 0x020A;
protected override void WndProc(ref Message m)
{
if (m.Msg == WM_MOUSEWHEEL)
m.HWnd = this.Parent.Handle;
base.WndProc(ref m);
}
}
and use that control instead.

Form in right panel is not updating when a menuitem is clicked on the left panel

I have added splitcontainer in a form for my application. Basically, I have multiple buttons in left panel, each having drop down menu items added dynamically. When an item is clicked, it brings a common form with updated values(in labels) in right panel. It works fine for the first time when a menu item is clicked.But in the next click of another menu item, brings out the old form details which should be giving a form with updated label values.The issue I am having is that the form is not updating label values. I couldn't find much about this issue online.Any help would be much appreciated.
Splitcontainer form;
public int lightIndex
{
get { return _lightindex; }
set { _lightindex = value; }
}
public int groupIndex
{
get { return _groupindex; }
set { _groupindex = value; }
}
Button click event
private void button_Click(object sender, EventArgs e)
{
Button btnSender = (Button)sender;
groupIndex = groupbuttons.IndexOf((Button)sender);
ContextMenu cm = new ContextMenu();
List<UserLight> alllight = Global.g_userlightgroups[_groupindex].getUserlights();
for (int i = 0; i < alllight.Count(); i++)
{
ContextMenu = cm;
MenuItem item = new MenuItem(alllight[i].getlightType().ToString());
item.Click += Item_Click;
cm.MenuItems.Add(item);
}
Point ptLowerLeft = new Point(0, btnSender.Height);
ptLowerLeft = btnSender.PointToScreen(ptLowerLeft);
cm.Show(btnSender, ptLowerLeft);
}
private void Item_Click(object sender, EventArgs e )
{
MenuItem menuItem = (MenuItem)sender;
String lighttype = menuItem.Text;
if (lighttype.Equals("PRIMITIVE"))
{
PrimitiveLight prim = new PrimitiveLight();
prim.TopLevel = false;
prim.Parent = lightcontainer.Panel2;
prim.groupIndex = _groupindex;
prim.lightIndex = menuItem.Index;
prim.Show();
prim.Dock = DockStyle.Fill;
}
}
PrimitiveLight form: This form will be inserted into splitcontainer panel2 when menu item is clicked.
private int _lightindex;
private int _groupindex;
public int lightIndex
{
get { return _lightindex; }
set { _lightindex = value; }
}
public int groupIndex
{
get { return _groupindex; }
set { _groupindex = value; }
}
private void PrimitiveLight_Load(object sender, EventArgs e)
{
lightDefname.Text = Global.g_userlightgroups[_groupindex].getUserlights().ElementAt(_lightindex).getdefName().ToString();
lightCustname.Text = Global.g_userlightgroups[_groupindex].getUserlights().ElementAt(_lightindex).getcustName().ToString();
}

panel2.Refresh() Maybe, dont know your issue but you can refresh the panel.

How to make a borderless form draggable on a custom title bar? [duplicate]

This question already has answers here:
How to move and resize a form without a border?
(7 answers)
Closed 7 years ago.
I have created a border-less form using c# but could make the custom title bar movable so I search the internet and found this code:
protected override void WndProc(ref Message m)
{
base.WndProc(ref m);
if (m.Msg == WM_NCHITTEST)
m.Result = (IntPtr)(HT_CAPTION);
}
private const int WM_NCHITTEST = 0x84;
private const int HT_CLIENT = 0x1;
private const int HT_CAPTION = 0x2;
After applying this code can click and drag my form in every inch of the form except for the title bar .

This is a good example of the movable title bar.
This is a full example
using System;
using System.Drawing;
using System.Windows.Forms;
namespace Custom_Title_Bar
{
public partial class MainForm : Form
{
private PictureBox title = new PictureBox(); // create a PictureBox
private Label minimise = new Label(); // this doesn't even have to be a label!
private Label maximise = new Label(); // this will simulate our this.maximise box
private Label close = new Label(); // simulates the this.close box
private bool drag = false; // determine if we should be moving the form
private Point startPoint = new Point(0, 0); // also for the moving
public MainForm()
{
this.FormBorderStyle = FormBorderStyle.None;// get rid of the standard title bar
this.title.Location = this.Location; // assign the location to the form location
this.title.Width = this.Width; // make it the same width as the form
this.title.Height = 50; // give it a default height (you may want it taller/shorter)
this.title.BackColor = Color.Black; // give it a default colour (or load an image)
this.Controls.Add(this.title); // add it to the form's controls, so it gets displayed
// if you have an image to display, you can load it, instead of assigning a bg colour
// this.title.Image = new Bitmap(System.Environment.CurrentDirectory + "\\title.jpg");
// if you displayed an image, alter the SizeMode to get it to display as you want it to
// examples:
// this.title.SizeMode = PictureBoxSizeMode.StretchImage;
// this.title.SizeMode = PictureBoxSizeMode.CenterImage;
// this.title.SizeMode = PictureBoxSizeMode.Zoom;
// etc
// you may want to use PictureBoxes and display images
// or use buttons, there are many alternatives. This is a mere example.
this.minimise.Text = "Minimise"; // Doesn't have to be
this.minimise.Location = new Point(this.Location.X + 5, this.Location.Y + 5); // give it a default location
this.minimise.ForeColor = Color.Red; // Give it a colour that will make it stand out
// this is why I didn't use an image, just to keep things simple:
this.minimise.BackColor = Color.Black; // make it the same as the PictureBox
this.Controls.Add(this.minimise); // add it to the form's controls
this.minimise.BringToFront(); // bring it to the front, to display it above the picture box
this.maximise.Text = "Maximise";
// remember to make sure it's far enough away so as not to overlap our minimise option
this.maximise.Location = new Point(this.Location.X + 60, this.Location.Y + 5);
this.maximise.ForeColor = Color.Red;
this.maximise.BackColor = Color.Black; // remember, we want it to match the background
this.maximise.Width = 50;
this.Controls.Add(this.maximise); // add it to the form
this.maximise.BringToFront();
this.close.Text = "Close";
this.close.Location = new Point(this.Location.X + 120, this.Location.Y + 5);
this.close.ForeColor = Color.Red;
this.close.BackColor = Color.Black;
this.close.Width = 37; // this is just to make it fit nicely
this.Controls.Add(this.close);
this.close.BringToFront();
// now we need to add some functionality. First off, let's give those labels
// MouseHover and MouseLeave events, so they change colour
// Since they're all going to change to the same colour, we can give them the same
// event handler, which saves time of writing out all those extra functions
this.minimise.MouseEnter += new EventHandler(Control_MouseEnter);
this.maximise.MouseEnter += new EventHandler(Control_MouseEnter);
this.close.MouseEnter += new EventHandler(Control_MouseEnter);
// and we need to do the same for MouseLeave events, to change it back
this.minimise.MouseLeave += new EventHandler(Control_MouseLeave);
this.maximise.MouseLeave += new EventHandler(Control_MouseLeave);
this.close.MouseLeave += new EventHandler(Control_MouseLeave);
// and lastly, for these controls, we need to add some functionality
this.minimise.MouseClick += new MouseEventHandler(Control_MouseClick);
this.maximise.MouseClick += new MouseEventHandler(Control_MouseClick);
this.close.MouseClick += new MouseEventHandler(Control_MouseClick);
// finally, wouldn't it be nice to get some moveability on this control?
this.title.MouseDown += new MouseEventHandler(Title_MouseDown);
this.title.MouseUp += new MouseEventHandler(Title_MouseUp);
this.title.MouseMove += new MouseEventHandler(Title_MouseMove);
}
private void Control_MouseEnter(object sender, EventArgs e)
{
if (sender.Equals(this.close))
this.close.ForeColor = Color.White;
else if (sender.Equals(this.maximise))
this.maximise.ForeColor = Color.White;
else // it's the minimize label
this.minimise.ForeColor = Color.White;
}
private void Control_MouseLeave(object sender, EventArgs e)
{
// return them to their default colors
if (sender.Equals(this.close))
this.close.ForeColor = Color.Red;
else if (sender.Equals(this.maximise))
this.maximise.ForeColor = Color.Red;
else // it's the minimise label
this.minimise.ForeColor = Color.Red;
}
private void Control_MouseClick(object sender, MouseEventArgs e)
{
if (sender.Equals(this.close))
this.Close(); // close the form
else if (sender.Equals(this.maximise))
{
// maximise is more interesting. We need to give it different functionality,
// depending on the window state (Maximise/Restore)
if (this.maximise.Text == "Maximise")
{
this.WindowState = FormWindowState.Maximized; // maximise the form
this.maximise.Text = "Restore"; // change the text
this.title.Width = this.Width; // stretch the title bar
}
else // we need to restore
{
this.WindowState = FormWindowState.Normal;
this.maximise.Text = "Maximise";
}
}
else // it's the minimise label
this.WindowState = FormWindowState.Minimized; // minimise the form
}
void Title_MouseUp(object sender, MouseEventArgs e)
{
this.drag = false;
}
void Title_MouseDown(object sender, MouseEventArgs e)
{
this.startPoint = e.Location;
this.drag = true;
}
void Title_MouseMove(object sender, MouseEventArgs e)
{
if (this.drag)
{
// if we should be dragging it, we need to figure out some movement
Point p1 = new Point(e.X, e.Y);
Point p2 = this.PointToScreen(p1);
Point p3 = new Point(p2.X - this.startPoint.X,
p2.Y - this.startPoint.Y);
this.Location = p3;
}
}
} // end of the class
} // end of the namespace
If you want you can extract just the moving code and integrate it with your code, the movable Title code is just in the following Event Handlers
Title_MouseUp
Title_MouseDown
Title_MouseMove
Here is the original article for this code, you can read it for more explanation about the code
http://www.dreamincode.net/forums/topic/64981-designing-a-custom-title-bar/
The link to original article is broken

Deleting Specific controls in an c# form

When I click a button I want to delete that particular flowlayout panel along with the check box and the button itself.But I have no clue how to do this.
Here is my code to do this:
private static CheckBox _taskCompletionCheckBox;
public static void DisplaySingleTask(LayoutType layoutType, FlowLayoutPanel layoutPanel,TodoItem item)
{
//creates a panel
var parentPanel = new FlowLayoutPanel {Parent = layoutPanel, AutoSize = true, BorderStyle = BorderStyle.FixedSingle};
//Based on layout type, the panel's content's are determined
switch (layoutType)
{
case LayoutType.Small:
_taskCompletionCheckBox = new CheckBox {Parent = parentPanel, Dock = DockStyle.Left,Text = item.Name,AutoSize = true,BackColor = Color.Transparent};
_taskCompletionCheckBox.CheckedChanged += checkBox_CheckedChanged;
_taskCompletionCheckBox.Show();
var delBtn = new Button { Parent = parentPanel, Dock = DockStyle.Left, Size = new Size(30, _taskCompletionCheckBox.Size.Width),Image = Resources.DeleteTaskImage};
delBtn.Click += delBtn_Click;
break;
case LayoutType.Normal:
break;
case LayoutType.Full:
break;
default:
throw new ArgumentOutOfRangeException("layoutType");
}
}
static void delBtn_Click(object sender, EventArgs e)
{
//I would like to know how can I get a reference to the the flowlayout panel here so I can call the dispose() method on it.
}

If I have got your point, the FlawLayoutPanel you are looking for is parent of the button. Cast the sender parameter of the event handler to button and get it's parent.
static void delBtn_Click(object sender, EventArgs e)
{
Button button = (Button)sender;
FlowLayoutPanel panel = (FlowLayoutPanel)button.Parent;
// ..
}

How to make image button

I was wondering how could I do this. I know I can use the button component but it has the little gray stuff around it when I give it a image. With image button how could I show another image for the hover effect

You want to create a button with no border but displays different images when the user hovers over it with the mouse? Here's how you can do it:
Add an ImageList control to your form at add two images, one for the button's normal appearance and one for when the mouse is hovering over.
Add your button and set the following properties:
FlatStyle = Flat
FlatAppearance.BorderColor (and maybe MouseOverBackColor & MouseDownBackColor) to your form's background color
ImageList = the ImageList you added to the form
ImageIndex to the index value of your normal image
Code the MouseHover and MouseLeave events for the button like this:
// ImageList index value for the hover image.
private void button1_MouseHover(object sender, EventArgs e) => button1.ImageIndex = 1;
// ImageList index value for the normal image.
private void button1_MouseLeave(object sender, EventArgs e) => button1.ImageIndex = 0;
I believe that will give you the visual effect you're looking for.

Small summary (Border, MouseDownBackColor, MouseOverBackColor)
FlatApperance
BorderColor = Black or what ever you want
BorderSize = can be set to 0
MouseDownBackColor = Transparent
MouseOverBackColor = Transparent
Text = none
For MouseDown:
// ImageList index value for the mouse down image.
private void button1_MouseDown(object sender, MouseEventArgs e) => button1.ImageIndex = 2;

You can assign the BackgroundImage property for the button. You can also use the OnMouseEnter and OnMouseExit events to change the background as per your request.
See BackgroundImage OnMouseEnter OnMouseLeave

I also needed an image button, but I wanted one like the ToolstripMenuButton.
With the correct borders and colors on hover.
So I made a custom control to do just that:
using System;
using System.ComponentModel;
using System.Windows.Forms;
namespace LastenBoekInfrastructure.Controls.Controls
{
[DefaultEvent("Click")]
public class ImageButton : UserControl
{
public string ToolTipText
{
get { return _bButton.ToolTipText; }
set { _bButton.ToolTipText = value; }
}
public bool CheckOnClick
{
get { return _bButton.CheckOnClick; }
set { _bButton.CheckOnClick = value; }
}
public bool DoubleClickEnabled
{
get { return _bButton.DoubleClickEnabled; }
set { _bButton.DoubleClickEnabled = value; }
}
public System.Drawing.Image Image
{
get { return _bButton.Image; }
set { _bButton.Image = value; }
}
public new event EventHandler Click;
public new event EventHandler DoubleClick;
private ToolStrip _tsMain;
private ToolStripButton _bButton;
public ImageButton()
{
InitializeComponent();
}
private void InitializeComponent()
{
var resources = new ComponentResourceManager(typeof(ImageButton));
_tsMain = new ToolStrip();
_bButton = new ToolStripButton();
_tsMain.SuspendLayout();
SuspendLayout();
//
// tsMain
//
_tsMain.BackColor = System.Drawing.Color.Transparent;
_tsMain.CanOverflow = false;
_tsMain.Dock = DockStyle.Fill;
_tsMain.GripMargin = new Padding(0);
_tsMain.GripStyle = ToolStripGripStyle.Hidden;
_tsMain.Items.AddRange(new ToolStripItem[] {
_bButton});
_tsMain.Location = new System.Drawing.Point(0, 0);
_tsMain.Name = "_tsMain";
_tsMain.Size = new System.Drawing.Size(25, 25);
_tsMain.TabIndex = 0;
_tsMain.Renderer = new ImageButtonToolStripSystemRenderer();
//
// bButton
//
_bButton.DisplayStyle = ToolStripItemDisplayStyle.Image;
_bButton.Image = ((System.Drawing.Image)(resources.GetObject("_bButton.Image")));
_bButton.ImageTransparentColor = System.Drawing.Color.Magenta;
_bButton.Name = "_bButton";
_bButton.Size = new System.Drawing.Size(23, 22);
_bButton.Click += bButton_Click;
_bButton.DoubleClick += bButton_DoubleClick;
//
// ImageButton
//
Controls.Add(_tsMain);
Name = "ImageButton";
Size = new System.Drawing.Size(25, 25);
_tsMain.ResumeLayout(false);
_tsMain.PerformLayout();
ResumeLayout(false);
PerformLayout();
}
void bButton_Click(object sender, EventArgs e)
{
if (Click != null)
{
Click(this, e);
}
}
void bButton_DoubleClick(object sender, EventArgs e)
{
if(DoubleClick != null)
{
DoubleClick(this, e);
}
}
public class ImageButtonToolStripSystemRenderer : ToolStripSystemRenderer
{
protected override void OnRenderToolStripBorder(ToolStripRenderEventArgs e)
{
//base.OnRenderToolStripBorder(e);
}
}
}
}