Develop Reference

C# ToolStripProfessionalRender, event OnRenderItemText applied only on the first item

I'm drawing a custom toolstrip using ToolStripProfessionalRender and editing the OnRenderItemText event as follows:
protected override void OnRenderItemText(ToolStripItemTextRenderEventArgs e)
{
e.Item.ForeColor = Clr.White;
e.Item.TextAlign = ContentAlignment.MiddleLeft;
e.Item.Alignment = ToolStripItemAlignment.Left;
base.OnRenderItemText(e);
if (e.Item.GetType() == typeof(ToolStripDropDownButton))
{
ToolStripDropDownButton tsmi = (ToolStripDropDownButton)e.Item;
if (tsmi.HasDropDownItems && tsmi.OwnerItem == null)
{
Rectangle bounds = tsmi.Bounds;
bounds.X = bounds.Right - 25;
bounds.Width = 25;
bounds.Y = 10;
// Draw the corner
Graphics G = e.Graphics;
SolidBrush brushw = new SolidBrush(Color.FromArgb(70,70,70));
Point[] points =
{
new Point(bounds.Right - 3, bounds.Height - 11), // point top right
new Point(bounds.Right - 3, bounds.Bottom - 14), // point bottom right
new Point(bounds.Right - 10, bounds.Bottom - 14) // point bottom left
};
G.FillPolygon(brushw, points);
}
}
}
and basically the output i'm trying to obtain is the following:
So drawing a little triangle on the bottom right corner when i got a ToolStripDropDownButton. The problem is that the little triangle is drawn only first item.
To end up the question i draw this toolstrip dynamically using a function that adds a dropdownbutton at each call.
ToolStripDropDownButton m_Item = new ToolStripDropDownButton(text, image);
m_Item.ImageAlign = ContentAlignment.MiddleCenter;
m_Item.ImageScaling = ToolStripItemImageScaling.None;
m_Item.Name = name;
m_Item.ForeColor = Color.White;
m_Item.BackColor = Color.FromArgb(95, 95, 95);
m_Item.Padding = new Padding(5);
m_Item.ShowDropDownArrow = false;
m_Item.Paint += new PaintEventHandler(this.PaintButtonBorder);
if (tabPage != null)
m_Item.Click += (sender, e) => AddClickTab(sender, e, tabPage);
((ToolStripDropDownMenu)m_Item.DropDown).ShowImageMargin = false;
((ToolStripDropDownMenu)m_Item.DropDown).ShowCheckMargin = false;
((ToolStripDropDownMenu)m_Item.DropDown).Cursor = Cursors.Hand;
toolStrip1.Items.Add(m_Item);
if (SubItems != null)
{
for(int i = 0; i < SubItems.Length; i++)
{
object[] subitem = (object[])SubItems[i];
FnAddToolStripMenuItem(
subitem[0].ToString(),
subitem[1].ToString(),
(Bitmap)subitem[2],
m_Item,
(TabPage)subitem[3]
);
}
}
Am i missing some "new" maybe?

Override the OnRenderItemText method only to draw the text part as it says, and/or to set the default properties used when rendering the text. To change the look and the shape of the arrows of the dropdown items, override the OnRenderArrow method.
Example
using System.Drawing;
using System.Drawing.Drawing2D;
protected override void OnRenderArrow(ToolStripArrowRenderEventArgs e)
{
// Optional: to be the default color of the arrows.
e.ArrowColor = Color.FromArgb(70, 70, 70);
if (e.Item is ToolStripDropDownButton item && item.OwnerItem == null)
{
var g = e.Graphics;
var r = new Rectangle(item.Bounds.Width - 10, item.Bounds.Height - 10, 8, 8);
g.SmoothingMode = SmoothingMode.AntiAlias;
g.PixelOffsetMode = PixelOffsetMode.Half;
using (var br = new SolidBrush(e.ArrowColor))
g.FillPolygon(br, new[]
{
new Point(r.Left, r.Bottom),
new Point(r.Right, r.Top),
new Point(r.Right, r.Bottom)
});
g.SmoothingMode = SmoothingMode.None;
g.PixelOffsetMode = PixelOffsetMode.Default;
}
else
base.OnRenderArrow(e);
}
protected override void OnRenderItemText(ToolStripItemTextRenderEventArgs e)
{
e.Item.ForeColor = Color.White;
e.Item.TextAlign = ContentAlignment.MiddleLeft;
e.Item.Alignment = ToolStripItemAlignment.Left;
base.OnRenderItemText(e);
}
Make sure to enable the ShowDropDownArrow property of the dropdown buttons. So comment this m_Item.ShowDropDownArrow = false;.
If you are also interested to change the color according to the current state of the dropdown button (Selected, Pressed), then you can do for example:
using (var br = new SolidBrush(item.Selected
? Color.FromArgb(150, 150, 150) : item.Pressed
? Color.FromArgb(100, 100, 100) :
Color.FromArgb(70, 70, 70)))
//...

How to add callout in picturebox using C#?

I need to add WedgeRectCallout callout on picturebox using C#.
Is there a way to do it?
please refer image using below link to know about the callout.
In word document, I can do the same using Spire.Doc library and writing below code:
ShapeObject Shape1 = para1.AppendShape(30, 50, ShapeType.WedgeRectCallout);

Here is a minimal example. It creates a Panel subclass with a nested TextBox.
Note that you can't add controls to a PictureBox in the designer. Instead you can put it on top and use the Nest function to embed it in the PBox..
(I use a trick to simplify the drawing of the border: since shrinking a GraphicsPath is hard and I am too lazy to write out two of them, I draw the border twice and add a little offset. The effect is a shadow effect, which looks rather nice for a cheat..)
Here is the class in action:
And here is the class code:
class WedgeCallout : Panel
{
public WedgeCallout()
{
tb = new TextBox();
Controls.Add(tb);
}
TextBox tb = null;
GraphicsPath gp = new GraphicsPath();
protected override void OnLayout(LayoutEventArgs levent)
{
tb.Size = new Size(Width - 10, (int)(Height * 0.66));
tb.Location = new Point(5, 5);
tb.BackColor = BackColor;
tb.ForeColor = ForeColor ;
tb.BorderStyle = BorderStyle.None;
tb.Text = "Hiho";
tb.Multiline = true;
tb.TextAlign = HorizontalAlignment.Center;
tb.Font = Font;
SetRegion();
base.OnLayout(levent);
}
protected override void OnBackColorChanged(EventArgs e)
{
base.OnBackColorChanged(e);
if (BackColor != Color.Transparent)
tb.BackColor = BackColor;
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
if (Tag == null) return;
e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
using(SolidBrush brush = new SolidBrush(tb.BackColor))
e.Graphics.FillPath(brush, (GraphicsPath)Tag);
using (Pen pen = new Pen(Color.DarkGray, 2f))
e.Graphics.DrawPath(pen, (GraphicsPath)Tag);
e.Graphics.TranslateTransform(-1, -1);
using (Pen pen = new Pen(ForeColor, 2f))
e.Graphics.DrawPath(pen, (GraphicsPath)Tag);
}
void SetRegion()
{
Rectangle r = ClientRectangle;
int h = (int)(r.Height * 0.75f);
if (gp != null) gp.Dispose();
gp = new GraphicsPath();
gp.AddPolygon(new PointF[]{ new Point(0,0),
new Point(r.Width-1, 0), new Point(r.Width-1, h),
new PointF(50, h) , new Point(0, r.Height-1),
new PointF(20, h), new PointF(0, h)});
Region = new Region(gp);
Tag = gp;
}
}
You can set the colors and the Font in the designer..
And the Nest function:
void Nest(Control child, Control parent)
{
Point p0 = parent.PointToScreen(Point.Empty);
Point p1 = child.PointToScreen(Point.Empty);
child.Location = new Point(p1.X - p0.X, p1.Y - p0.Y);
child.Parent = parent;
}
It is called from the Form where the controls sit: Nest(wedgeCallout1, pictureBox1);
Note that to save to callout with the pbox in one image you need to
Nest the callout in the PBox
Use pbox.DrawToBitmap
Temporarily set the backcolor to transparent
Example:
private void saveBtn_Click(object sender, EventArgs e)
{
Size sz = pictureBox1.ClientSize;
using (Bitmap bmp = new Bitmap(sz.Width, sz.Height))
{
Color old = wedgeCallout1.BackColor;
wedgeCallout1.BackColor = Color.Transparent;
pictureBox1.DrawToBitmap(bmp, pictureBox1.ClientRectangle);
bmp.Save(filename, ImageFormat.Png);
wedgeCallout1.BackColor = old;
}
}

Why when i create the bitmap it's empty all white?

private Bitmap CropImage()
{
Bitmap pic = pictureBoxSnap.Image as Bitmap;
Bitmap cropped = new Bitmap(rect.Width, rect.Height);
using (Graphics g = Graphics.FromImage(cropped))
{
g.DrawImage(pic, new Rectangle(0, 0, rect.Width, rect.Height),
rect, GraphicsUnit.Pixel);
}
pic.Save(#"c:\temp\testingitimage.jpg");
cropped.Save(#"c:\temp\testingitimage1.bmp");
return cropped;
}
I added this two lines of Save to test what i get. The first one pic i see the correct image that is in the pictureBox.
But the second one cropped is all white and empty.
And i call this method from the pictureBox paint event:
private void pictureBoxSnap_Paint(object sender, PaintEventArgs e)
{
if (pictureBoxSnap.Image != null)
{
{
if (ClearGraphics == false)
{
if (cropRect == false)
{
if (rectangles[listBoxSnap.SelectedIndex] != Rectangle.Empty)
{
e.Graphics.DrawRectangle(Pens.Firebrick, rectangles[listBoxSnap.SelectedIndex]);
}
}
else
{
if (rect.Width > 10 && rect.Height > 10)
{
e.Graphics.DrawRectangle(Pens.Gray, rect);
pictureBoxSnap.Image = CropImage();
Image img = CropImage();
img.Save(#"c:\temp\testimageing.jpg");
}
}
}
}
}
}
I used a breakpoint on the: e.Graphics.DrawRectangle(Pens.Gray, rect); and rect is not empty ( rect is Rectangle i draw on the pictureBox then when i click on a button it's making validate for the pictureBox).
I also did a save here too and testimageing i see it black on the hard disk but when i edit it with Paint i see it's white empty.
For exmaple when i draw a rectangle on the pictureBox then i use a breakpoint in the CropImage method i see that the variable rect is for example: X = 136 Y = 149 Width = 131 Height = 106
Also in the paint event this rect variable have the same values.
And the pictureBox size is: 640x480
And the pictureBox property SizeMode is set to: zoom
Wo why i get empty white image ? And not the cropped rectangle with the part of the image inside ?
EDIT:
This is the code im using now:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
using DannyGeneral;
using System.Diagnostics;
namespace MinimizeCapture
{
public partial class Form1 : Form
{
Boolean bHaveMouse;
Point ptOriginal = new Point();
Point ptLast = new Point();
bool cropRect;
Bitmap cloneBitmap;
Rectangle recttest;
private Rectangle Rect;
private Rectangle[] rectangles;
private Rectangle RectClone;
private bool btn = false;
private Point RectStartPoint = Point.Empty;
private Point RectEndPoint = Point.Empty;
private Brush selectionBrush = new SolidBrush(Color.Red);
private Pen pen;
private string selectedIndex;
private List<string> drawnItems = new List<string>();
private bool ClearGraphics;
public Form1()
{
InitializeComponent();
cropRect = false;
var windows = OpenWindowGetter.FindWindowsWithText();
ClearGraphics = false;
this.DoubleBuffered = true;
btn = false;
pen = new Pen(selectionBrush);
buttonSnap.Enabled = false;
backgroundWorker1.RunWorkerAsync();
}
private void buttonSnap_Click(object sender, EventArgs e)
{
ClearGraphics = true;
this.listBoxSnap.Items.Clear();
this.pictureBoxSnap.Image = null;
backgroundWorker1.RunWorkerAsync();
}
private void listBoxSnap_SelectedIndexChanged(object sender, EventArgs e)
{
WindowSnap snap = this.listBoxSnap.SelectedItem as WindowSnap;
selectedIndex = this.listBoxSnap.SelectedIndex.ToString();
this.pictureBoxSnap.Image = snap.Image;
for (int i = 0; i < rectangles.Length; i++)
{
if (rectangles[i] != RectClone)
{
ClearGraphics = false;
}
else
{
ClearGraphics = true;
}
}
}
private void checkBoxForceMDI_CheckedChanged(object sender, EventArgs e)
{
WindowSnap.ForceMDICapturing = (sender as CheckBox).Checked;
}
private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
{
listBoxSnap.Invoke(new MethodInvoker(delegate { this.listBoxSnap.Items.Add("Minimized Windows"); }));
listBoxSnap.Invoke(new MethodInvoker(delegate { this.listBoxSnap.Items.AddRange(WindowSnap.GetAllWindows(true,true).ToArray()); }));
}
private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
}
private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
rectangles = new Rectangle[listBoxSnap.Items.Count];
buttonSnap.Enabled = true;
}
private void pictureBoxSnap_Paint(object sender, PaintEventArgs e)
{
if (pictureBoxSnap.Image != null)
{
{
if (ClearGraphics == false)
{
if (rectangles[listBoxSnap.SelectedIndex] != Rectangle.Empty)
{
e.Graphics.DrawRectangle(Pens.Firebrick, rectangles[listBoxSnap.SelectedIndex]);
}
}
if (cropRect == true)
{
if (recttest.Width > 10 && recttest.Height > 10)
{
//e.Graphics.DrawRectangle(Pens.Gray, recttest);
e.Graphics.Clear(Color.White);
/*pictureBoxSnap.Image = CropImage();
Image img = CropImage();
img.Save(#"c:\temp\testimageing.jpg");*/
}
}
}
}
}
private void pictureBoxSnap_MouseMove(object sender, MouseEventArgs e)
{
if (btn == true)
{
ClearGraphics = false;
RectEndPoint = e.Location;
int currentindex = listBoxSnap.SelectedIndex;
rectangles[currentindex] = RectClone;
Rect = getRect(RectStartPoint, RectEndPoint);
RectClone = Rect;
pictureBoxSnap.Invalidate();
}
Point ptCurrent = new Point(e.X, e.Y);
// If we "have the mouse", then we draw our lines.
if (bHaveMouse)
{
// If we have drawn previously, draw again in
// that spot to remove the lines.
if (ptLast.X != -1)
{
MyDrawReversibleRectangle(ptOriginal, ptLast);
}
// Update last point.
ptLast = ptCurrent;
// Draw new lines.
MyDrawReversibleRectangle(ptOriginal, ptCurrent);
}
}
private void pictureBoxSnap_MouseDown(object sender, MouseEventArgs e)
{
RectStartPoint = e.Location;
btn = true;
Rect = Rectangle.Empty;
RectClone = Rectangle.Empty;
bHaveMouse = true;
// Store the "starting point" for this rubber-band rectangle.
ptOriginal.X = e.X;
ptOriginal.Y = e.Y;
// Special value lets us know that no previous
// rectangle needs to be erased.
ptLast.X = -1;
ptLast.Y = -1;
}
private void pictureBoxSnap_MouseUp(object sender, MouseEventArgs e)
{
recttest = rectangles[listBoxSnap.SelectedIndex];
ClearGraphics = false;
btn = false;
RectEndPoint = e.Location;
pictureBoxSnap.Invalidate();
int currentindex = listBoxSnap.SelectedIndex;
rectangles[currentindex] = RectClone;
// Set internal flag to know we no longer "have the mouse".
bHaveMouse = false;
// If we have drawn previously, draw again in that spot
// to remove the lines.
if (ptLast.X != -1)
{
Point ptCurrent = new Point(e.X, e.Y);
MyDrawReversibleRectangle(ptOriginal, ptLast);
}
// Set flags to know that there is no "previous" line to reverse.
ptLast.X = -1;
ptLast.Y = -1;
ptOriginal.X = -1;
ptOriginal.Y = -1;
pictureBoxSnap.Invalidate();
}
Rectangle getRect(Point p1, Point p2)
{
Point p = new Point(Math.Min(p1.X, p2.X), Math.Min(p1.Y, p2.Y));
Size s = new Size(Math.Abs(p1.X - p2.X), Math.Abs(p1.Y - p2.Y));
return new Rectangle(p, s);
}
private void ConfirmRectangle_Click(object sender, EventArgs e)
{
ConfirmRectangle.ForeColor = Color.Red;
ConfirmRectangle.Enabled = false;
StreamWriter w = new StreamWriter(#"c:\temp\Settings.txt", true);
w.WriteLine("Rectangle Location: " + RectClone.Location + " Rectangle Size: " + RectClone.Size + " Selected Index: " + selectedIndex);
textBoxIndex.Text = selectedIndex.ToString();
w.Close();
cropRect = false;
//pictureBoxSnap.Invalidate();
Image img = CropImage();
img.Save(#"c:\temp\testimageing.jpg");
pictureBoxSnap.Image = img;
}
// Convert and normalize the points and draw the reversible frame.
private void MyDrawReversibleRectangle(Point p1, Point p2)
{
Rectangle rc = new Rectangle();
// Convert the points to screen coordinates.
p1 = pictureBoxSnap.PointToScreen(p1);
p2 = pictureBoxSnap.PointToScreen(p2);
// Normalize the rectangle.
if (p1.X < p2.X)
{
rc.X = p1.X;
rc.Width = p2.X - p1.X;
}
else
{
rc.X = p2.X;
rc.Width = p1.X - p2.X;
}
if (p1.Y < p2.Y)
{
rc.Y = p1.Y;
rc.Height = p2.Y - p1.Y;
}
else
{
rc.Y = p2.Y;
rc.Height = p1.Y - p2.Y;
}
// Draw the reversible frame.
rect = new Rectangle(pictureBoxSnap.PointToClient(rc.Location), rc.Size);
ControlPaint.DrawReversibleFrame(rc, Color.Gray, FrameStyle.Dashed);
}
Rectangle rect = Rectangle.Empty;
private Bitmap CropImage()
{
//rect = recttest;
Bitmap pic = pictureBoxSnap.Image as Bitmap;
Bitmap cropped = new Bitmap(rect.Width, rect.Height);
using (Graphics g = Graphics.FromImage(cropped))
{
g.DrawImage(pic, new Rectangle(0, 0, rect.Width, rect.Height),
rect, GraphicsUnit.Pixel);
}
pic.Save(#"c:\temp\testingitimage.jpg");
cropped.Save(#"c:\temp\testingitimage1.bmp");
return cropped;
}
}
}
Moved the CropImage call method from the paint and added it to the button click here:
private void ConfirmRectangle_Click(object sender, EventArgs e)
{
ConfirmRectangle.ForeColor = Color.Red;
ConfirmRectangle.Enabled = false;
StreamWriter w = new StreamWriter(#"c:\temp\Settings.txt", true);
w.WriteLine("Rectangle Location: " + RectClone.Location + " Rectangle Size: " + RectClone.Size + " Selected Index: " + selectedIndex);
textBoxIndex.Text = selectedIndex.ToString();
w.Close();
cropRect = false;
//pictureBoxSnap.Invalidate();
Image img = CropImage();
img.Save(#"c:\temp\testimageing.jpg");
pictureBoxSnap.Image = img;
}
This lines:
Image img = CropImage();
img.Save(#"c:\temp\testimageing.jpg");
pictureBoxSnap.Image = img;
But what i get in the pictureBox is this:
Not sure why. The rectangle is in the position i drawed it's ok but instead showing the part of the original image cut in the rectangle it's doing like zoom in.

You are cropping multiple times.
pictureBoxSnap.Image = CropImage(); // First Time
Image img = CropImage(); // Second Time
img.Save(#"c:\temp\testimageing.jpg");
You just need to crop once. Here you are using same picturebox for source and for cropped image. first time when you crop then image. the cropped image will be set correctly to the picturebox. but, second time application will try to crop that image again.
You should do like this
Image img = CropImage();
img.Save(#"c:\temp\testimageing.jpg");
pictureBoxSnap.Image = img;

private Bitmap CropImage(){
Bitmap pic = pictureBoxSnap.Image as Bitmap;
Bitmap cropped = new Bitmap(rect.Width, rect.Height);
using (Graphics g = Graphics.FromImage(cropped)){
g.DrawImage(pic, new Rectangle(0, 0, rect.Width, rect.Height),
rect, GraphicsUnit.Pixel);
}
using (Graphics g = Graphics.FromImage(pic)){
g.DrawImage(cropped , 136, 149, rect.Width, rect.Height);
//Draw the rectangle
}
//pic.Save(#"c:\temp\testingitimage.jpg");
//cropped.Save(#"c:\temp\testingitimage1.bmp");
return pic;
}
valter

Drawing inside a picturebox (control) inside foreach

I'm trying to making dynamic controls (labels, pictureboxes and buttons) by making controls in a foreach. The foreach is controlled by datarows, which are created from an SQL function that I call for.
The problem is that my graphics don't seem to work on my pictureboxes as it is now.
So far I've got this as code:
Global variables:
private int i = 0, beginningHeight = 70, addingToHeight = 55;
PictureBox picturebox = new PictureBox();
The functions:
private void tonenAlleCategorieen()
{
foreach (DataRow dr in blCategorie.getAlleCategorieenMetLimieten())
{
//making labels dyanmic and fill them with the correct text (from database)
string categorie = (string)dr.Field<string>("Omschrijving");
Label label = new Label();
label.BackColor = Color.Transparent;
label.ForeColor = Color.FromArgb(97, 97, 97);
label.Font = new Font("Myriam Pro", 10, FontStyle.Bold);
label.Width = 200;
label.Name = categorie;
label.Text = categorie;
label.BackColor = Color.Transparent;
label.Location = new Point(30, beginningHeight + addingToHeight);
this.Controls.Add(label);
// getting the figures (max figures) from the db to show in a label
double limiet = (double)dr.Field<double>("maximumBedrag");
Label labeltest = new Label();
labeltest.BackColor = Color.Transparent;
labeltest.ForeColor = Color.FromArgb(97, 97, 97);
labeltest.Font = new Font("Myriam Pro", 8, FontStyle.Bold);
labeltest.Width = 200;
labeltest.Name = Convert.ToString(limiet);
labeltest.Text = "Limiet: " + Convert.ToString(limiet) + "€";
labeltest.BackColor = Color.Transparent;
labeltest.Location = new Point(30, (beginningHeight + 27) + addingToHeight);
this.Controls.Add(labeltest);
//making pictureboxes for every single row in the db
PictureBox picturebox = new PictureBox();
picturebox.Width = 400;
picturebox.Name = "picturebox" + i;
picturebox.Height = 15;
picturebox.Location = new Point(30, (beginningHeight + 27) + addingToHeight);
this.Controls.Add(picturebox);
//calling the paint event for drawing inside the pictureboxes
picturebox.Paint += new PaintEventHandler(picturebox_Paint);
//adjusting height (55px extra per new row)
beginningHeight += 55;
i++;
}
}
private void picturebox_Paint(object sender, PaintEventArgs e)
{
Graphics g = e.Graphics;
//draw here
//Graphics g = picturebox.CreateGraphics();
int x = 30;
int y = (beginningHeight + 27) + addingToHeight;
int breedteGebruikt = 200;
int breedteNietGebruikt = picturebox.Width - breedteGebruikt;
int hoogteBalk = picturebox.Height;
g.DrawRectangle(new Pen(Color.Red), new Rectangle(10, 5, 50, 5));
g.FillRectangle(Brushes.Green, x, y, breedteNietGebruikt, hoogteBalk);
g.FillRectangle(Brushes.Red, x, y, breedteGebruikt, hoogteBalk);
picturebox.Refresh();
}
Can anybody help me out here and tell me how I can add the graphics into my pictureboxes so I can see how much percentage of my picturebox should be filled?
Here is a picture example to have a good look onto it:
As you see in the above image it currently doesn't work, and I've put data in the database for the first record named "Boodschappen" which should now be filled in by my graphics for 30% in this example.
Does anybody know a solution please? :)
Thanks

Now the troubles only rise on this part: I'm not allowed to add the g
to this.Controls.Add(g); it gives me the error Argument 1: cannot
convert from 'System.Drawing.Graphics' to
'System.Windows.Forms.Control
It's clear you can't add Graphics as a control. Also if you draw that way your drawing will disappear when picturebox or form repainted. So you should draw inside the Paint event of picturebox.
double maxLimit = 0;
int maxleftpos = 0;
private void tonenAlleCategorieen()
{
foreach (DataRow dr in blCategorie.getAlleCategorieenMetLimieten())
{
//making labels dyanmic and fill them with the correct text (from database)
string categorie = (string)dr.Field<string>("Omschrijving");
Label label = new Label();
label.BackColor = Color.Transparent;
label.ForeColor = Color.FromArgb(97, 97, 97);
label.Font = new Font("Myriam Pro", 10, FontStyle.Bold);
label.Width = 200;
label.Name = categorie;
label.Text = categorie;
label.BackColor = Color.Transparent;
label.Location = new Point(10, beginningHeight + addingToHeight);
maxleftpos = Math.Max(label.Left + label.Width, maxleftpos);
this.Controls.Add(label);
// getting the figures (max figures) from the db to show in a label
double limiet = (double)dr.Field<double>("maximumBedrag");
maxLimit = Math.Max(limiet, maxLimit);
Label labeltest = new Label();
labeltest.BackColor = Color.Transparent;
labeltest.ForeColor = Color.FromArgb(97, 97, 97);
labeltest.Font = new Font("Myriam Pro", 8, FontStyle.Bold);
labeltest.Width = 200;
labeltest.Name = Convert.ToString(limiet);
labeltest.Text = "Limiet: " + Convert.ToString(limiet) + "€";
labeltest.BackColor = Color.Transparent;
labeltest.Location = new Point(30, (beginningHeight + 27) + addingToHeight);
this.Controls.Add(labeltest);
//making pictureboxes for every single row in the db
PictureBox picturebox = new PictureBox();
picturebox.Width = 200;
picturebox.Name = "picturebox" + i;
picturebox.Height = 15;
picturebox.Tag = limiet;
picturebox.Location = new Point(100, (beginningHeight + 27) + addingToHeight);
this.Controls.Add(picturebox);
picturebox.BringToFront();
//calling the paint event for drawing inside the pictureboxes
picturebox.Paint += new PaintEventHandler(picturebox_Paint);
//adjusting height (55px extra per new row)
beginningHeight += 55;
i++;
}
foreach (Control c in this.Controls)
{
if (c is PictureBox)
{
c.Location = new Point(maxleftpos, c.Top);
}
}
if (this.Width<maxleftpos+150)
{
this.Width = maxleftpos + 50;
}
this.Refresh();
}
private void picturebox_Paint(object sender, PaintEventArgs e)
{
PictureBox p = sender as PictureBox;
Graphics gr = e.Graphics;
gr.ResetTransform();
//Graphics g = picturebox.CreateGraphics();
int breedteGebruikt = Convert.ToInt32((double)p.Tag);
int max = Convert.ToInt32(maxLimit);
int grwidht = breedteGebruikt * p.Width / max;
gr.DrawRectangle(new Pen(Color.Red), new Rectangle(10, 5, 50, 5));
gr.FillRectangle(Brushes.Green, 0, 0, p.Width, p.Height);
gr.FillRectangle(Brushes.Red, 0, 0, grwidht, p.Height);
}

How to change the background color of unused space tab in C# winforms?

Ex
|Tab1|Tab2|Tab3| { }
| |
| |
| |
| |
|_____________________|
I am able to change the backcolor and forecolor of Tab.. but I want to change the color of that { } -- > Empty space is this possible to do that. .. It shows default winforms color..help me in dis..
private void Form1_Load(object sender, EventArgs e)
{
}
private void tabControl1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
Font fntTab;
Brush bshBack;
Brush bshFore;
if ( e.Index == this.tabControl1.SelectedIndex)
{
fntTab = new Font(e.Font, FontStyle.Bold);
bshBack = new System.Drawing.Drawing2D.LinearGradientBrush(e.Bounds, SystemColors.Control, SystemColors.Control, System.Drawing.Drawing2D.LinearGradientMode.BackwardDiagonal);
bshFore = Brushes.Black;
//bshBack = new System.Drawing.Drawing2D.LinearGradientBrush(e.Bounds, Color.LightSkyBlue , Color.LightGreen, System.Drawing.Drawing2D.LinearGradientMode.BackwardDiagonal);
//bshFore = Brushes.Blue;
}
else
{
fntTab = e.Font;
bshBack = new SolidBrush(Color.Red);
bshFore = new SolidBrush(Color.Aqua);
//bshBack = new SolidBrush(Color.White);
//bshFore = new SolidBrush(Color.Black);
}
string tabName = this.tabControl1.TabPages[e.Index].Text;
StringFormat sftTab = new StringFormat();
e.Graphics.FillRectangle(bshBack, e.Bounds);
Rectangle recTab = e.Bounds;
recTab = new Rectangle( recTab.X, recTab.Y + 4, recTab.Width, recTab.Height - 4);
e.Graphics.DrawString(tabName, fntTab, bshFore, recTab, sftTab);
}

Try adding the following code to your DrawItem event handler. Don't forget to set the DrawMode to "OwnerdrawFixed".
You might have to tweak it a bit to cover some margins which aren't painted.
private void tabControl1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
SolidBrush fillbrush= new SolidBrush(Color.Red);
//draw rectangle behind the tabs
Rectangle lasttabrect = tabControl1.GetTabRect(tabControl1.TabPages.Count - 1);
Rectangle background = new Rectangle();
background.Location = new Point(lasttabrect.Right, 0);
//pad the rectangle to cover the 1 pixel line between the top of the tabpage and the start of the tabs
background.Size = new Size(tabControl1.Right - background.Left, lasttabrect.Height+1);
e.Graphics.FillRectangle(fillBrush, background);
}
'This answer is much better than prior one. But the tabCtrl is not defined. It has to be tabControl1 control.

I think the only way to give that space a color is to override the OnPaintBackground method of the window, so just paste this on your form (window)
you must also change the Appearance Property to "Normal"
private void Form1_Load(object sender, EventArgs e)
{
}
protected override void OnPaintBackground(PaintEventArgs e)
{
base.OnPaintBackground(e);
Rectangle lasttabrect = tabControl1.GetTabRect(tabControl1.TabPages.Count - 1);
RectangleF emptyspacerect = new RectangleF(
lasttabrect.X + lasttabrect.Width + tabControl1.Left,
tabControl1.Top + lasttabrect.Y,
tabControl1.Width - (lasttabrect.X + lasttabrect.Width),
lasttabrect.Height);
Brush b = Brushes.BlueViolet; // the color you want
e.Graphics.FillRectangle(b, emptyspacerect );
}
for me it's working perfectly

you can also create a custom tabcontrol as you did
public class mytab : TabControl
{
public mytab()
: base()
{
this.DrawMode = TabDrawMode.OwnerDrawFixed;
this.DrawItem += new DrawItemEventHandler(tabControl1_DrawItem);
}
private void tabControl1_DrawItem(object sender, System.Windows.Forms.DrawItemEventArgs e)
{
Font fntTab;
Brush bshBack;
Brush bshFore;
if (e.Index == this.SelectedIndex)
{
fntTab = new Font(e.Font, FontStyle.Bold);
bshBack = new System.Drawing.Drawing2D.LinearGradientBrush(e.Bounds, SystemColors.Control, SystemColors.Control, System.Drawing.Drawing2D.LinearGradientMode.BackwardDiagonal);
bshFore = Brushes.Black;
//bshBack = new System.Drawing.Drawing2D.LinearGradientBrush(e.Bounds, Color.LightSkyBlue , Color.LightGreen, System.Drawing.Drawing2D.LinearGradientMode.BackwardDiagonal);
//bshFore = Brushes.Blue;
}
else
{
fntTab = e.Font;
bshBack = new SolidBrush(Color.Red);
bshFore = new SolidBrush(Color.Aqua);
//bshBack = new SolidBrush(Color.White);
//bshFore = new SolidBrush(Color.Black);
}
string tabName = this.TabPages[e.Index].Text;
StringFormat sftTab = new StringFormat();
e.Graphics.FillRectangle(bshBack, e.Bounds);
Rectangle recTab = e.Bounds;
recTab = new Rectangle(recTab.X, recTab.Y + 4, recTab.Width, recTab.Height - 4);
e.Graphics.DrawString(tabName, fntTab, bshFore, recTab, sftTab);
Rectangle r = this.GetTabRect(this.TabPages.Count - 1);
RectangleF tf =
new RectangleF(r.X + r.Width,
r.Y-5, this.Width - (r.X + r.Width)+5, r.Height+5);
Brush b = Brushes.BlueViolet;
e.Graphics.FillRectangle(b, tf);
}
}