Movable UserControl in WPF - c#

I created simple UserControl with several labels. How can I implement simple mechanism, that allows moving whole control like normal window (when I add it to winForms - if it makes difference)


You can use my Capture class:
public class ClsCapture
{
bool bCaptureMe;
Point pLocation = new Point();
Control dd;
//Handles dad.MouseDown, dd.MouseDown
private void Form1_MouseDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
{
try {
bCaptureMe = true;
pLocation = e.GetPosition(sender);
} catch {
}
}
//Handles dad.MouseMove, dd.MouseMove
private void Form1_MouseMove(object sender, System.Windows.Input.MouseEventArgs e)
{
try {
if (bCaptureMe) {
dd.Margin = new Thickness(dd.Margin.Left - pLocation.X + e.GetPosition(sender).X, dd.Margin.Top - pLocation.Y + e.GetPosition(sender).Y, dd.Margin.Right, dd.Margin.Bottom);
}
} catch {
}
}
//Handles dad.MouseUp, dd.MouseUp
private void Form1_MouseUp(object sender, System.Windows.Input.MouseButtonEventArgs e)
{
try {
bCaptureMe = false;
} catch {
}
}
public ClsCapture(Control pnl)
{
dd = pnl;
dd.PreviewMouseLeftButtonDown += Form1_MouseDown;
dd.PreviewMouseLeftButtonUp += Form1_MouseUp;
dd.PreviewMouseMove += Form1_MouseMove;
}
public static void CaptureMe(Control pnl)
{
ClsCapture cc = new ClsCapture(pnl);
}
}
Usage:
ClsCapture.CaptureMe(AnyControlYouWant);

Related

How to make disabled control allow to be draggable or move by mouse?

I use dragging control by mouse
Problem is if Control.Enabled = false. Dragging can't work? Is there any method to overload to prevent this behavior?
static void control_MouseEnter(object sender, EventArgs e)
{
(sender as Control).Enabled = false;
(sender as Control).Cursor = Cursors.SizeAll;
}
static void control_MouseLeave(object sender, EventArgs e)
{
(sender as Control).Enabled = true;
// (sender as Control).Cursor = Cursors.Default;
}
static void control_MouseDown(object sender, MouseEventArgs e)
{
mouseLocation = e.Location;
// turning on dragging
draggables[(Control)sender] = true;
}
static void control_MouseUp(object sender, MouseEventArgs e)
{
// turning off dragging
draggables[(Control)sender] = false;
}
static void control_MouseMove(object sender, MouseEventArgs e)
{
// only if dragging is turned on
if (draggables[(Control)sender] == true)
{
var control = (sender as Control);
control.Left = e.X + control.Left - mouseLocation.X;
control.Top = e.Y + control.Top - mouseLocation.Y;
}
}

You could use IMessageFilter to trap WM_MOUSEMOVE.
Here I'm changing the caption of the form when the mouse is moved within pictureBox1. It also tells you whether the left mouse button is down:
public partial class Form1 : Form
{
private MyFilter mf;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
pictureBox1.Enabled = false;
mf = new MyFilter();
mf.PreFilterMouseMove += Mf_PreFilterMouseMove;
Application.AddMessageFilter(mf);
}
private void Mf_PreFilterMouseMove()
{
Point pt = pictureBox1.PointToClient(Cursor.Position);
if (pictureBox1.ClientRectangle.Contains(pt))
{
bool leftDown = (Control.MouseButtons == MouseButtons.Left);
this.Text = "leftDown = " + leftDown + " : position = " + pt.ToString();
}
else
{
this.Text = "...not within pictureBox1...";
}
}
}
public class MyFilter : IMessageFilter
{
private const int WM_MOUSEMOVE = 0x200;
public delegate void dlgMouseMove();
public event dlgMouseMove PreFilterMouseMove;
public bool PreFilterMessage(ref Message m)
{
switch (m.Msg)
{
case WM_MOUSEMOVE:
if (PreFilterMouseMove != null)
{
PreFilterMouseMove();
}
break;
}
return false;
}
}

Can't change TextBox.Text from another form

I have the following C# code in my winform application:
FormPrincipale
private void butFornitore_Click(object sender, EventArgs e)
{
try
{
FormFornitore Dialog = new FormFornitore();
Dialog.ShowDialog();
}
catch(Exception excDial)
{
MessageBox.Show("DIALOG: " + excDial.Message);
}
}
public void getFornitore(string Codice, string Descrizione)
{
this.txtFornitore.Text = Descrizione;
Fornitore = Codice;
}
FormFornitore
private void gridFornitori_DoubleClick(object sender, EventArgs e)
{
try
{
var Codice = gridView2.GetFocusedDataRow()["codconto"].ToString();
var RagSoc = gridView2.GetFocusedDataRow()["dscconto1"].ToString();
FormPrincipale Form = new FormPrincipale();
Form.getFornitore(Codice, RagSoc);
this.Close();
}
catch(Exception excGrid)
{
MessageBox.Show("GRID: " + excGrid.Message);
}
}
The code works (i used breakpoints to check if code was executed) but the Text property of the TextBox doesn't change. I put Modifiers TextBox property on Public, so this is ok too. I'm using Dev Express Grid Control, but i don't think this is the problem. Thank's for help.

To pass the instance of your parent form, you could do something like this:
class FormFornitore: Form
{
protected FormPrincipale parent;
FormFornitore(FormPrincipale parent)
{
this.parent = parent;
}
private void gridFornitori_DoubleClick(object sender, EventArgs e)
{
try
{
var Codice = gridView2.GetFocusedDataRow()["codconto"].ToString();
var RagSoc = gridView2.GetFocusedDataRow()["dscconto1"].ToString();
/// REMOVE THIS FormPrincipale Form = new FormPrincipale();
parent.getFornitore(Codice, RagSoc);
this.Close();
}
catch(Exception excGrid)
{
MessageBox.Show("GRID: " + excGrid.Message);
}
}
}
Then in your "FormPricipale" use it like this
private void butFornitore_Click(object sender, EventArgs e)
{
try
{
FormFornitore Dialog = new FormFornitore(this); // Notice the argument
Dialog.ShowDialog();
}
catch(Exception excDial)
{
MessageBox.Show("DIALOG: " + excDial.Message);
}
}
public void getFornitore(string Codice, string Descrizione)
{
this.txtFornitore.Text = Descrizione;
Fornitore = Codice;
}

c# - Cannot convert from void to list

So, I got kind of stuck over my head while I tried to program something new.
I'm trying to add objectBeer_pluche or objectBeer_Elektro to my OBJberenlijst on the Beren Main form from the details Form, so I can add both instances of 2 classes to the same list.
I'm not even sure this is possible by the way. So, I would like feedback if what I am trying to do is possible to start with. I already figured VOID is not right but I am really clueless here.
This is my main beren.cs form with an OBJberenlist, that's where I try to add objectBeer_pluche or objectBeer_Elektro into it:
public partial class Beren : Form
{
public interface Berenlijst { }
public List<Berenlijst> OBJberenLijst = new List<Berenlijst>();
public Beren()
{
InitializeComponent();
}
private void Beren_Load(object sender, EventArgs e)
{
}
private void BTNToevoegen_Click(object sender, EventArgs e)
{
this.Hide();
Details Details = new Details();
if (Details.ShowDialog(this) == DialogResult.OK)
{
OBJberenLijst.Add(Details.getdetails());
}
Details.Close();
Details.Dispose();
}
public void LijstLaden()
{
foreach(Beer berenobject in OBJberenLijst)
{
LST_beren.Items.Add(berenobject.Naam);
}
}
}
}
from this form called details.cs
public partial class Details : Form
{
public Details()
{
InitializeComponent();
BTN_toevoegen.DialogResult = DialogResult.OK;
BTN_cancel.DialogResult = DialogResult.Cancel;
}
private void Details_Load(object sender, EventArgs e)
{
RDB_pluche.Checked = true;
BTN_ok.Enabled = false;
}
private void RDB_pluche_CheckedChanged(object sender, EventArgs e)
{
PANEL_pluche.Visible = true;
PANEL_elektro.Visible = false;
}
private void RDB_elektro_CheckedChanged(object sender, EventArgs e)
{
PANEL_pluche.Visible = false;
PANEL_elektro.Visible = true;
}
private void BTN_toevoegen_Click(object sender, EventArgs e)
{
open_foto.Filter = "jpg (*.jpg)|*.jpg|bmp(*.bmp)|*.bmp|png(*.png)|*.png";
if (open_foto.ShowDialog() == System.Windows.Forms.DialogResult.OK && open_foto.FileName.Length > 0)
{
TXT_adres.Text = open_foto.FileName;
PIC_beer.Image = Image.FromFile(open_foto.FileName);
}
}
private void BTN_ok_Click(object sender, EventArgs e)
{
}
public void getdetails()
{
if (RDB_pluche.Enabled == true)
{
Pluche_Beer objectBeer_pluche = new Pluche_Beer(TXTNaam_pluche.Text, open_foto.FileName, "(Wasprogramma: " + TXT_wasprogramma.ToString() + " Graden Celsius");
}
else
{
Elektronische_Beer objectBeer_Elektro = new Elektronische_Beer(TXTNaam_elekro.Text, open_foto.FileName, "aantal Batterijen: " + CMBOBatterijen.ToString());
}
}
private void Details_MouseMove(object sender, MouseEventArgs e)
{
foreach (Control c in this.Controls)
{
if (c is TextBox)
{
TextBox textBox = c as TextBox;
if (textBox.Text != string.Empty)
{
BTN_ok.Enabled = true;
}
}
}
}
}
}

The problem is between this line...
OBJberenLijst.Add(Details.getdetails());
...and this line.
public void getdetails()
List.Add() requires an object to add, but getdetails() returns void. You probably want to change getdetails() to something like the following:
public Berenlijst getdetails()
{
if (RDB_pluche.Enabled == true)
{
return new Pluche_Beer(TXTNaam_pluche.Text, open_foto.FileName, "(Wasprogramma: " + TXT_wasprogramma.ToString() + " Graden Celsius");
}
return new Elektronische_Beer(TXTNaam_elekro.Text, open_foto.FileName, "aantal Batterijen: " + CMBOBatterijen.ToString());
}
Hopefully Pluche_Beer and Elektronisch_Beer inherent from Berenlijst. Otherwise you'll have to revise your logic in a broader way.

Calculator, clear window when second variable is typed after chosen operator

So I have this calculator http://gyazo.com/589156935eec141c3aedf83b9f960d29 (not enough reputation sorry)
When I type [1] and then [2] the display shows [12]
If I press a operator for example [+] the number 12 is still supposed to be shown in the display.
But, if I now start typing new numbers The old ones are supposed to be removed from the display. But i can't get this to work.
My form:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Miniräknare
{
public partial class Form1 : Form
{
Miniräknare miniräknare;
public Form1()
{
InitializeComponent();
miniräknare = new Miniräknare(0, 0, "", 0, false);
}
private void btnEquals_Click(object sender, EventArgs e)
{
tbxWindow.Text = miniräknare.doEquals();
}
private void btnNum1_Click(object sender, EventArgs e)
{
tbxWindow.Text = miniräknare.getOperand("1", tbxWindow.Text);
}
private void btnNum2_Click(object sender, EventArgs e)
{
tbxWindow.Text = miniräknare.getOperand("2", tbxWindow.Text);
}
private void btnNum3_Click(object sender, EventArgs e)
{
tbxWindow.Text = miniräknare.getOperand("3", tbxWindow.Text);
}
private void btnNum4_Click(object sender, EventArgs e)
{
tbxWindow.Text = miniräknare.getOperand("4", tbxWindow.Text);
}
private void btnNum5_Click(object sender, EventArgs e)
{
tbxWindow.Text = miniräknare.getOperand("5", tbxWindow.Text);
}
private void btnNum6_Click(object sender, EventArgs e)
{
tbxWindow.Text = miniräknare.getOperand("6", tbxWindow.Text);
}
private void btnNum7_Click(object sender, EventArgs e)
{
tbxWindow.Text = miniräknare.getOperand("7", tbxWindow.Text);
}
private void btnNum8_Click(object sender, EventArgs e)
{
tbxWindow.Text = miniräknare.getOperand("8", tbxWindow.Text);
}
private void btnNum9_Click(object sender, EventArgs e)
{
tbxWindow.Text = miniräknare.getOperand("9", tbxWindow.Text);
}
private void btnNum0_Click(object sender, EventArgs e)
{
if (tbxWindow.Text != "") tbxWindow.Text = miniräknare.getOperand("0", tbxWindow.Text);
}
private void btnOperatorDivision_Click(object sender, EventArgs e)
{
}
private void btnOperatorTimes_Click(object sender, EventArgs e)
{
}
private void btnOperatorPlus_Click(object sender, EventArgs e)
{
miniräknare.Op = "+";
}
private void btnOperatorMinus_Click(object sender, EventArgs e)
{
miniräknare.Op = "-";
miniräknare.Change = true;
}
private void btnDecimal_Click(object sender, EventArgs e)
{
tbxWindow.Text = miniräknare.getOperand(",", tbxWindow.Text);
}
private void btnClear_Click(object sender, EventArgs e)
{
}
private void btnSin_Click(object sender, EventArgs e)
{
}
private void btnCos_Click(object sender, EventArgs e)
{
}
private void btnTan_Click(object sender, EventArgs e)
{
}
private void btnSquared_Click(object sender, EventArgs e)
{
}
private void btnModulus_Click(object sender, EventArgs e)
{
}
private void btnExponential_Click(object sender, EventArgs e)
{
}
private void btnlogarithm_Click(object sender, EventArgs e)
{
}
private void btn1OverX_Click(object sender, EventArgs e)
{
}
private void btnLn_Click(object sender, EventArgs e)
{
}
private void btnPi_Click(object sender, EventArgs e)
{
}
private void btnMemoryClear_Click(object sender, EventArgs e)
{
}
private void btnMemoryRecall_Click(object sender, EventArgs e)
{
}
private void btnMemorySave_Click(object sender, EventArgs e)
{
}
}
}
My class:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Miniräknare
{
class Miniräknare
{
private double first;
private double second;
private string op;
private double memory;
private bool change;
public Miniräknare(double first, double second, string op, double memory, bool change)
{
this.first = 0;
this.second = 0;
this.op = "";
this.memory = 0;
this.change = false;
}
public double First
{
get {return first; }
set { first = value; }
}
public double Second
{
get { return second; }
set { second = value; }
}
public string Op
{
get { return op; }
set { op = value; }
}
public double Memory
{
get { return memory; }
set { memory = value; }
}
public bool Change
{
get { return change; }
set { change = value; }
}
public string getOperand(string t, string textBox)
{
textBox = textBox + t;
if (t.Equals(","))
{
change = true;
second = double.Parse(textBox);
}
else if (op.Equals(""))
{
if (!change)
{
textBox = "";
change = true;
textBox = textBox + t;
}
first = double.Parse(textBox);
}
else
{
if (!change)
{
textBox = "";
change = true;
textBox = textBox + t;
}
second = double.Parse(textBox);
}
return textBox;
}
/* public string calculateAnswer()
{
} */
public string doEquals()
{
if (op == "-" ) return (first - second).ToString();
else return null;
}
}
}

In the following block after pressing "+" button "change" is true and the block is skipped when type the first digit of the second number.
else
{
if (!change)
{
textBox = "";
change = true;
textBox = textBox + t;
}
second = double.Parse(textBox);
}
since you assigned textBox at the beginning of the getOperand method, it will return the value combining what you already had on the screen with the new char.
public string getOperand(string t, string textBox)
{
textBox = textBox + t;
This should do the trick:
public string getOperand(string t, string textBox)
{
if (t.Equals(","))
{
textBox = textBox + t;
change = true;
second = double.Parse(textBox);
}
else if (Op.Equals(""))
{
textBox = textBox + t;
if (!change)
{
textBox = "";
change = true;
textBox = textBox + t;
}
first = double.Parse(textBox);
}
else
{
if (!change)
{
textBox = textBox + t;
}
else
{
textBox = t;
change = false;
}
second = double.Parse(textBox);
}
return textBox;
}

I know this is not https://codereview.stackexchange.com/ and this does not answer the question asked (which has already been answered) and might be marked as off-topic, but wanted to show the changes as suggested in the various comments in an orderly fashion, just to help you improve your coding (current and future) experience.
Changes that can be made to your Miniräknare class (Comments added to explain):
public class Miniräknare
{
public Miniräknare()
{
// Have a default constructor that sets all the default properties
First = 0;
Second = 0;
Op = "";
Memory = 0;
Change = false;
}
public Miniräknare(double first, double second, string op, double memory, bool change)
{
// If you have a constructor with parameters, use the parameters to set your properties
First = first;
Second = second;
Op = op;
Memory = memory;
Change = change;
}
// Use automatic properties, this improves readability and less confusion (As per D Stanley in comments)
public double First { get; set; }
public double Second { get; set; }
public string Op { get; set; }
public double Memory { get; set; }
public bool Change { get; set; }
public string getOperand(string t, string textBox)
{
// Apply changes as per the accepted answer
textBox = textBox + t;
if (t.Equals(","))
{
Change = true;
Second = double.Parse(textBox);
}
else if (Op.Equals(""))
{
if (!Change)
{
textBox = "";
Change = true;
textBox = textBox + t;
}
First = double.Parse(textBox);
}
else
{
if (!Change)
{
textBox = "";
Change = true;
textBox = textBox + t;
}
Second = double.Parse(textBox);
}
return textBox;
}
public string doEquals()
{
if (Op == "-") return (First - Second).ToString();
else return null;
}
}
Changes in your Form1:
Instantiate your miniräknare variable now like this, since you where setting them to the defaults with your original input parameters.
miniräknare = new Miniräknare();
Replace all your btnNum1_Click to btnNum9_Click event handlers with this single event handler to improve readability and volume of your code (Check additional comments in the code):
private void btnNumber_Click(object sender, EventArgs e)
{
// !! Remember !! to set the Tag value of each of your buttons to their corresponding values
// Then change btnNum1 to btnNum9's Click events to btnNumber_Click
// Additionally you can also just use ((Button)sender).Text if their text values will never change
// You could even do this with your operators, unless you have specific code for the button (like you have for btnNum0)
tbxWindow.Text = miniräknare.getOperand(((Button)sender).Tag as String, tbxWindow.Text);
}

How to override Control.Invalidate() method?

I use OwnerDrawAll properties for my control:
this.customTreeView.DrawMode =System.Windows.Forms.TreeViewDrawMode.OwnerDrawAll;
this.customTreeView.DrawNode +=
new System.Windows.Forms.DrawTreeNodeEventHandler(customTreeView_DrawNode);
private void customTreeView_DrawNode(object sender, DrawTreeNodeEventArgs e) {
if(!myComboBoxChanged) { // Draw the whole control(tree and info)
drawNode(e);
drawInfo(e);
} else { // Draw only info
drawInfo(e);
}
}
Then I use text changed event:
private void cBox_TextChanged(object sender, EventArgs e)
{
text = cBox.Text; // I need this in drawInfo()
myComboBoxChanged = true;
this.customTreeView.Invalidate(); // It doesn't do what I want
myComboBoxChanged = false;
}
Here Invalidate() method redrawing the whole tree, how can I fix this so only drawInfo() will be called ?

the better way is to create your own TreeView Class and encapsulate all of your methods and properties so :
public class MyTreeView : TreeView
{
public bool TextBoxChanged { get; set; }
public MyTreeView()
{
DrawMode = TreeViewDrawMode.OwnerDrawAll;
DrawNode += new System.Windows.Forms.DrawTreeNodeEventHandler(customTreeView_DrawNode);
}
protected override void OnInvalidated(InvalidateEventArgs e)
{
//comment the below line to create your own Invalidate
//base.OnInvalidated(e);
}
private void customTreeView_DrawNode(object sender, DrawTreeNodeEventArgs e)
{
if (!TextBoxChanged)
{ // Draw the whole control(tree and info)
drawNode(e);
drawInfo(e);
}
else
{ // Draw only info
drawInfo(e);
}
}
private void drawNode(DrawTreeNodeEventArgs e)
{
//...........
}
private void drawInfo(DrawTreeNodeEventArgs e)
{
//...........
}
}

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