I have a problem where I need to draw a line using a mouse and lock the angle every 5 degrees.
I can lock the line horizontally and vertically but I can't lock in an angle
if (e.Button == MouseButtons.Left)
{
if (e.Button != MouseButtons.Left)
{
return;
}
startLine = new Point();
endLine = new Point();
if (ModifierKeys == Keys.Control)
{
pointLineDest = new Point(e.X, pointLineOrigin.Y);
}
else if (ModifierKeys == (Keys.Control | Keys.Shift))
{
pointLineDest = new Point(pointLineOrigin.X, e.Y);
}
else
{
pointLineDest = e.Location;
Globals.AddOutputLog($"{CalculeAngle(pointLineOrigin, pointLineDest)}");
}
startLine = new Point(pointLineOrigin.X, pointLineOrigin.Y);
endLine = new Point(pointLineDest.X, pointLineDest.Y);
canvas.Refresh();
}
in the above code i lock to 0 degree when hold ctrl and hold 90 degree when hold shift + ctrl.
But I need to allow the user to move the line 5 degrees if he wants and I have no idea how to do that.
Can anyone help me, please?
sorry for my English.
Edit -----------------
I think I solved the problem but there is still a detail.
Using the follow method i can rotate 5 degrees when i move the mouse.
static Point RotatePoint(Point pointToRotate, Point centerPoint, double angleInDegrees)
{
double angleInRadians = angleInDegrees * (Math.PI / 180);
double cosTheta = Math.Cos(angleInRadians);
double sinTheta = Math.Sin(angleInRadians);
return new Point
{
X = (int)(cosTheta * (pointToRotate.X - centerPoint.X) -
sinTheta * (pointToRotate.Y - centerPoint.Y) + centerPoint.X),
Y = (int)(sinTheta * (pointToRotate.X - centerPoint.X) +
cosTheta * (pointToRotate.Y - centerPoint.Y) + centerPoint.Y)
};
}
I call the method inside mouseMove event like this:
Point tempP = new Point(e.X, pointLineOrigin.Y);
int dy = e.Y - pointLineOrigin.Y;
int dir = (dy > 0) ? -1 : 1;
if (dir == -1)
pointLineDest = RotatePoint(tempP, pointLineOrigin, -5);
else
pointLineDest = RotatePoint(tempP, pointLineOrigin, 5);
startLine = new Point(pointLineOrigin.X, pointLineOrigin.Y);
endLine = new Point(pointLineDest.X, pointLineDest.Y);
So I have a line that starts at 0 degrees and if I move the mouse up it changes to 5 degrees, if I move down it changes to -5 degrees. Perfect! But if I keep moving the mouse up or down it doesn't increase the incline by 5 degrees. That is, I can only move 5 degrees up or down once.
How can I keep the line rotating as I move the mouse?
Edit --------------------
Ok, i got it with help from #amin29 a. Thank you mate!
_rad5 = DegreeToRadian(5);
float rad = (float)Math.Atan2(e.Y - pointLineOrigin.Y, e.X - pointLineOrigin.X);
int x = pointLineOrigin.X;
int y = pointLineOrigin.Y;
float angle = rad;
double step = _rad5;
double finalAngle;
double c = rad % _rad5;
finalAngle = angle - c;
if (c > step / 2)
finalAngle = (angle - c) + step;
double length = Math.Sqrt((Math.Pow(pointLineOrigin.X - e.X, 2) + Math.Pow(pointLineOrigin.Y - e.Y, 2)));
// Create points that define line.
Point point1 = new Point(x, y);
Point point2 = new Point((int)(x + Math.Cos(finalAngle) * length), (int)(y + Math.Sin(finalAngle) * length));
startLine = point1;
endLine = point2;
use these methods
private double DegreeToRadian(double degree)
{
return degree * Math.PI / 180;
}
private Point LockInAngle(Point pt, double degree)
{
int y = (int)(pt.X * Math.Tan(DegreeToRadian(degree)));
return new Point(pt.X, y);
}
and your code shoud be like this
if (e.Button == MouseButtons.Left)
{
startLine = new Point();
endLine = new Point();
if (ModifierKeys == Keys.Control)
{
pointLineDest = new Point(e.X, pointLineOrigin.Y);
}
else if (ModifierKeys == (Keys.Control | Keys.Shift))
{
pointLineDest = new Point(pointLineOrigin.X, e.Y);
}
else
{
pointLineDest = LockInAngle(e.Location, 5);
}
startLine = new Point(pointLineOrigin.X, pointLineOrigin.Y);
endLine = new Point(pointLineDest.X, pointLineDest.Y);
canvas.Refresh();
}
Edit ---------------------------------------------------------
check this code ,it is windows forms
public partial class Form1 : Form
{
Point startLine;
Point endLine;
Point pointLineDest;
Point pointLineOrigin;
double _rad5;
public Form1()
{
InitializeComponent();
startLine = Point.Empty;
endLine = Point.Empty;
pointLineOrigin = new Point(Width / 2, Height / 2);
Paint += Form1_Paint;
SizeChanged += Form1_SizeChanged;
_rad5 = DegreeToRadian(5);
}
private void Form1_SizeChanged(object sender, EventArgs e)
{
pointLineOrigin = new Point(Width / 2, Height / 2);
Invalidate(false);
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
e.Graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic; ;
e.Graphics.DrawLine(Pens.Red, startLine, endLine);
}
private void Form1_MouseMove(object sender, MouseEventArgs e)
{
if (ModifierKeys == Keys.Control)
{
pointLineDest = new Point(e.X, pointLineOrigin.Y);
startLine = new Point(pointLineOrigin.X, pointLineOrigin.Y);
endLine = new Point(pointLineDest.X, pointLineDest.Y);
Invalidate(false);
}
else if (ModifierKeys == (Keys.Control | Keys.Shift))
{
pointLineDest = new Point(pointLineOrigin.X, e.Y);
startLine = new Point(pointLineOrigin.X, pointLineOrigin.Y);
endLine = new Point(pointLineDest.X, pointLineDest.Y);
Invalidate(false);
}
else
{
float rad =(float) Math.Atan2(e.Y - pointLineOrigin.Y, e.X - pointLineOrigin.X);
if (Math.Abs(rad % _rad5) < 0.005)
{
pointLineDest = e.Location;
startLine = new Point(pointLineOrigin.X, pointLineOrigin.Y);
endLine = new Point(pointLineDest.X, pointLineDest.Y);
Invalidate(false);
}
}
}
private double DegreeToRadian(double degree)
{
return degree * Math.PI / 180;
}
}
Edit----------
I edited your code for better performance and you can add MouseUp and MouseDown event if you want to work with left click. (If your canvas have DoubleBuffered property set it to true)
public partial class Form1 : Form
{
bool _isMouseDown;
Point startLine;
Point endLine;
Point pointLineDest;
Point pointLineOrigin;
float _rad5;
float _rad5DivideBy2;
public Form1()
{
InitializeComponent();
this.DoubleBuffered = true;
_rad5 = DegreeToRadian(5);
_rad5DivideBy2 = _rad5 / 2;
startLine = Point.Empty;
endLine = Point.Empty;
pointLineOrigin = new Point(Width / 2, Height / 2);
Paint += Form1_Paint;
SizeChanged += Form1_SizeChanged;
}
private void Form1_SizeChanged(object sender, EventArgs e)
{
pointLineOrigin = new Point(Width / 2, Height / 2);
Invalidate(false);
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
e.Graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
e.Graphics.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.Bilinear;
e.Graphics.DrawLine(Pens.Red, startLine, endLine);
}
private void Form1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
_isMouseDown = true;
}
}
private void Form1_MouseUp(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
_isMouseDown = false;
}
}
private void Form1_MouseMove(object sender, MouseEventArgs e)
{
if (_isMouseDown)
{
if (ModifierKeys == Keys.Control)
{
pointLineDest = new Point(e.X, pointLineOrigin.Y);
startLine = new Point(pointLineOrigin.X, pointLineOrigin.Y);
endLine = new Point(pointLineDest.X, pointLineDest.Y);
Invalidate(false);
}
else if (ModifierKeys == (Keys.Control | Keys.Shift))
{
pointLineDest = new Point(pointLineOrigin.X, e.Y);
startLine = new Point(pointLineOrigin.X, pointLineOrigin.Y);
endLine = new Point(pointLineDest.X, pointLineDest.Y);
Invalidate(false);
}
else
{
int dx = e.X - pointLineOrigin.X;
int dy = e.Y - pointLineOrigin.Y;
float rad = (float)Math.Atan2(dy, dx);
if (rad < 0)
{
rad += (float)(2 * Math.PI);
}
float rem = rad % _rad5;
float finalAngle = rad - rem;
if (rem > _rad5DivideBy2)
{
finalAngle += _rad5;
}
float length = (float)Math.Sqrt(dx * dx + dy * dy);
pointLineDest = new Point((int)(Math.Cos(finalAngle) * length), (int)(Math.Sin(finalAngle) * length));
pointLineDest.Offset(pointLineOrigin);
startLine = new Point(pointLineOrigin.X, pointLineOrigin.Y);
endLine = new Point(pointLineDest.X, pointLineDest.Y);
Invalidate(false);
}
}
}
private float DegreeToRadian(float degree)
{
return (float)(degree * Math.PI / 180);
}
}
Related
How can I make a free-form selection (like in paint or photoshop) in a picture box and then crop that selection and save it to a folder?
I already did a rectangle crop but I want that free-form selection..
Here is my rectangle crop:
Image img;
bool mouseClicked;
Point startPoint = new Point();
Point endPoint = new Point();
Rectangle rectCropArea;
private void Button1_Click(System.Object sender, System.EventArgs e)
{
}
private void OnLoad(System.Object sender, System.EventArgs e)
{
loadPrimaryImage();
}
private void loadPrimaryImage()
{
img = Image.FromFile("..\\..\\images.jpg");
PictureBox1.Image = img;
}
private void PicBox_MouseUp(System.Object sender, System.Windows.Forms.MouseEventArgs e)
{
mouseClicked = false;
if ((endPoint.X != -1)) {
Point currentPoint = new Point(e.X, e.Y);
Y1.Text = e.X.ToString();
Y2.Text = e.Y.ToString();
}
endPoint.X = -1;
endPoint.Y = -1;
startPoint.X = -1;
startPoint.Y = -1;
}
private void PicBox_MouseDown(System.Object sender, System.Windows.Forms.MouseEventArgs e)
{
mouseClicked = true;
startPoint.X = e.X;
startPoint.Y = e.Y;
//Display coordinates
X1.Text = startPoint.X.ToString();
Y1.Text = startPoint.Y.ToString();
endPoint.X = -1;
endPoint.Y = -1;
rectCropArea = new Rectangle(new Point(e.X, e.Y), new Size());
}
private void PicBox_MouseMove(System.Object sender, System.Windows.Forms.MouseEventArgs e)
{
Point ptCurrent = new Point(e.X, e.Y);
if ((mouseClicked)) {
if ((endPoint.X != -1)) {
//Display Coordinates
X1.Text = startPoint.X.ToString();
Y1.Text = startPoint.Y.ToString();
X2.Text = e.X.ToString();
Y2.Text = e.Y.ToString();
}
endPoint = ptCurrent;
if ((e.X > startPoint.X & e.Y > startPoint.Y)) {
rectCropArea.Width = e.X - startPoint.X;
rectCropArea.Height = e.Y - startPoint.Y;
} else if ((e.X < startPoint.X & e.Y > startPoint.Y)) {
rectCropArea.Width = startPoint.X - e.X;
rectCropArea.Height = e.Y - startPoint.Y;
rectCropArea.X = e.X;
rectCropArea.Y = startPoint.Y;
} else if ((e.X > startPoint.X & e.Y < startPoint.Y)) {
rectCropArea.Width = e.X - startPoint.X;
rectCropArea.Height = startPoint.Y - e.Y;
rectCropArea.X = startPoint.X;
rectCropArea.Y = e.Y;
} else {
rectCropArea.Width = startPoint.X - e.X;
rectCropArea.Height = startPoint.Y - e.Y;
rectCropArea.X = e.X;
rectCropArea.Y = e.Y;
}
PictureBox1.Refresh();
}
}
private void PicBox_Paint(System.Object sender, System.Windows.Forms.PaintEventArgs e)
{
Pen drawLine = new Pen(Color.Red);
drawLine.DashStyle = DashStyle.Dash;
e.Graphics.DrawRectangle(drawLine, rectCropArea);
}
private void btnCrop_Click(System.Object sender, System.EventArgs e)
{
PictureBox2.Refresh();
Bitmap sourceBitmap = new Bitmap(PictureBox1.Image, PictureBox1.Width, PictureBox1.Height);
Graphics g = PictureBox2.CreateGraphics();
if (!(CheckBox1.Checked)) {
g.DrawImage(sourceBitmap, new Rectangle(0, 0, PictureBox2.Width, PictureBox2.Height), rectCropArea, GraphicsUnit.Pixel);
sourceBitmap.Dispose();
} else {
int x1 = 0;
int x2 = 0;
int y1 = 0;
int y2 = 0;
try {
x1 = Convert.ToInt32(CX1.Text);
x2 = Convert.ToInt32(CX2.Text);
y1 = Convert.ToInt32(CY1.Text);
y2 = Convert.ToInt32(CY2.Text);
} catch (Exception ex) {
MessageBox.Show("Enter valid Coordinates (only Integer values)");
}
if (((x1 < x2 & y1 < y2))) {
rectCropArea = new Rectangle(x1, y1, x2 - x1, y2 - y1);
} else if ((x2 < x1 & y2 > y1)) {
rectCropArea = new Rectangle(x2, y1, x1 - x2, y2 - y1);
} else if ((x2 > x1 & y2 < y1)) {
rectCropArea = new Rectangle(x1, y2, x2 - x1, y1 - y2);
} else {
rectCropArea = new Rectangle(x2, y2, x1 - x2, y1 - y2);
}
PictureBox1.Refresh();
//This repositions the dashed box to new location as per coordinates entered.
g.DrawImage(sourceBitmap, new Rectangle(0, 0, PictureBox2.Width, PictureBox2.Height), rectCropArea, GraphicsUnit.Pixel);
sourceBitmap.Dispose();
}
}
private void pictureBox1_MouseClick(System.Object sender, System.Windows.Forms.MouseEventArgs e)
{
PictureBox1.Refresh();
}
private void CheckBox1_CheckedChanged(System.Object sender, System.EventArgs e)
{
if ((CheckBox1.Checked)) {
CX1.Visible = true;
Label10.Visible = true;
CY1.Visible = true;
Label9.Visible = true;
CX2.Visible = true;
Label8.Visible = true;
CY2.Visible = true;
Label7.Visible = true;
X1.Text = "0";
X2.Text = "0";
Y1.Text = "0";
Y2.Text = "0";
} else {
CX1.Visible = false;
Label10.Visible = false;
CY1.Visible = false;
Label9.Visible = false;
CX2.Visible = false;
Label8.Visible = false;
CY2.Visible = false;
Label7.Visible = false;
}
}
public Form1()
{
Load += OnLoad;
}
}
To copy a free-form selection you need to work with polygons.
Here is a complete example. Just paste this into a new solution and try it out (just change the path to the images).
It will create 2 pictureboxes and load an image into the first one and also create an image. Then you can click on the first image and when you have clicked 2 times it will start to show a selection, when you are finished just press the button and it will copy the selection to the other pictureBox and then save it as an png image.
What it does is to create a brush from the first image and then paint the polygon onto another image and set the other pixels in the rectangle to a background color of your choice, in this case the color: Color.Transparent.
Example:
public partial class Form1 : Form {
private List<Point> _points = new List<Point>();
private PictureBox _pictureBox1;
private PictureBox _pictureBox2;
private Button _button1;
public Form1() {
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e) {
Size = new Size(1366, 675);
_pictureBox1 = new PictureBox {
Location = new Point(12, 51),
Size = new Size(651, 474),
BorderStyle = BorderStyle.FixedSingle
};
_pictureBox2 = new PictureBox
{
Location = new Point(669, 51),
Size = new Size(651, 474),
BorderStyle = BorderStyle.FixedSingle
};
_button1 = new Button {
Text = #"Copy selected area",
Location = new Point(13, 13),
Size = new Size(175, 23)
};
Controls.AddRange(new Control[] { _pictureBox1, _pictureBox2, _button1 });
_pictureBox1.Image = Image.FromFile(#"d:\temp\Hopetoun_falls.jpg");
_points = new List<Point>();
_pictureBox1.MouseDown += delegate(object o, MouseEventArgs args) { _points.Add(args.Location); _pictureBox1.Refresh(); };
_pictureBox1.Paint += pictureBox1_Paint;
_button1.Click += button_Click;
}
private void pictureBox1_Paint(object sender, PaintEventArgs e) {
if (_points.Count < 2) {
return;
}
var max = _points.Count;
for (int i = 1; i < max; i++) {
e.Graphics.DrawLine(Pens.Red, _points[i-1].X, _points[i-1].Y, _points[i].X, _points[i].Y);
}
e.Graphics.DrawLine(Pens.Red, _points[max - 1].X, _points[max - 1].Y, _points[0].X, _points[0].Y);
}
private static Bitmap GetSelectedArea(Image source, Color bgColor, List<Point> points) {
var bigBm = new Bitmap(source);
using (var gr = Graphics.FromImage(bigBm)) {
// Set the background color.
gr.Clear(bgColor);
// Make a brush out of the original image.
using (var br = new TextureBrush(source)) {
// Fill the selected area with the brush.
gr.FillPolygon(br, points.ToArray());
// Find the bounds of the selected area.
var sourceRect = GetPointListBounds(points);
// Make a bitmap that only holds the selected area.
var result = new Bitmap(sourceRect.Width, sourceRect.Height);
// Copy the selected area to the result bitmap.
using (var resultGr = Graphics.FromImage(result)) {
var destRect = new Rectangle(0, 0, sourceRect.Width, sourceRect.Height);
resultGr.DrawImage(bigBm, destRect, sourceRect, GraphicsUnit.Pixel);
}
// Return the result.
return result;
}
}
}
private static Rectangle GetPointListBounds(List<Point> points) {
int xmin = points[0].X;
int xmax = xmin;
int ymin = points[0].Y;
int ymax = ymin;
for (int i = 1; i < points.Count; i++) {
if (xmin > points[i].X) xmin = points[i].X;
if (xmax < points[i].X) xmax = points[i].X;
if (ymin > points[i].Y) ymin = points[i].Y;
if (ymax < points[i].Y) ymax = points[i].Y;
}
return new Rectangle(xmin, ymin, xmax - xmin, ymax - ymin);
}
private void button_Click(object sender, EventArgs e) {
if (_points.Count < 3) {
return;
}
var img = GetSelectedArea(_pictureBox1.Image, Color.Transparent, _points);
_pictureBox2.Image = img;
_pictureBox2.Image.Save(#"d:\temp\sample.png", ImageFormat.Png);
}
}
I have a picturebox that I want the user of my winform to be able to interact with by zooming and dragging the image. Right now that form looks like this
I have the drag and zoom methods implemented. Those look like this.
private void pictureBox1_MouseWheel(object sender, MouseEventArgs e)
{
// If the mouse wheel is moved forward (Zoom in)
if (e.Delta > 0)
{
// Change the size of the picturebox, multiply it by the ZOOMFACTOR
pictureBox1.Width = (int)(pictureBox1.Width * 1.25);
pictureBox1.Height = (int)(pictureBox1.Height * 1.25);
// Formula to move the picturebox, to zoom in the point selected by the mouse cursor
pictureBox1.Top = (int)(e.Y - 1.25 * (e.Y - pictureBox1.Top));
pictureBox1.Left = (int)(e.X - 1.25 * (e.X - pictureBox1.Left));
}
else
{
pictureBox1.Width = (int)(pictureBox1.Width / 1.25);
pictureBox1.Height = (int)(pictureBox1.Height / 1.25);
// Formula to move the picturebox, to zoom in the point selected by the mouse cursor
pictureBox1.Top = (int)(e.Y - 0.80 * (e.Y - pictureBox1.Top));
pictureBox1.Left = (int)(e.X - 0.80 * (e.X - pictureBox1.Left));
}
}
private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
{
dragging = false;
Console.WriteLine("Dragging: false");
}
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == MouseButtons.Left)
{
dragging = true;
xDrag = e.X;
yDrag = e.Y;
Console.WriteLine("Dragging: true");
}
}
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
Control c = sender as Control;
if (dragging && c != null)
{
c.Top = e.Y + c.Top - yDrag;
c.Left = e.X + c.Left - xDrag;
Console.WriteLine(e.Location.ToString());
}
}
The dragging works fine but the zooming does not work as expected. Instead of zooming in it pushes the image up and to the left as I "zoom in"
Out of curiousity I loaded a bitmap I saved off Google in to test the zoom and it works fine with bitmap images from files; it just doesn't work with images drawn with the Graphics object and I have no idea why. Any help would be greatly appreciated.
Paint event code for picturebox
private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
RunEntry entry = this.passedHistory.SelectedItem as RunEntry;
if (entry == null)
{
return;
}
else if(entry.FileRead != null && checkBox1.Checked) //If ANS is selected and show all, get TRE
{
foreach(RunEntry r in passedHistory.Items)
{
if (r.TreComponentRead != null)
{
string ansName = Path.GetFileNameWithoutExtension(entry.FileName);
string treName = Path.GetFileNameWithoutExtension(r.FileName);
if(ansName.Equals(treName, StringComparison.OrdinalIgnoreCase))
{
entry.TreComponentRead = r.TreComponentRead;
}
}
}
}
if (isDraw && entry.FileRead != null)
{
//Preparing to draw
Graphics g = e.Graphics;
g.ScaleTransform(2f, 2f);
g.SmoothingMode = SmoothingMode.AntiAlias;
g.InterpolationMode = InterpolationMode.Bicubic;
AnsFile objToDraw = entry.FileRead;
Pen pen = new Pen(Color.Black);
//Getting size of bitmap
int maxWidth = 0, maxHeight = 0;
foreach (AnsJoint joint in objToDraw.AnsJoints)
{
if (joint.Location.X.Length > maxWidth)
{
maxWidth = (int)joint.Location.X.Length;
}
if (joint.Location.Y.Length > maxHeight)
{
maxHeight = (int)joint.Location.Y.Length;
}
}
//Drawing joints //TODO: (Trello: Improve math behind visualizer)
foreach (AnsJoint joint in objToDraw.AnsJoints)
{
PointF jointPoint = this.ToCartesian(new PointF((float)joint.Location.X.Length - 4f, (float)joint.Location.Y.Length + 10f), maxHeight);
e.Graphics.DrawString(joint.JointID.ToString(), new Font(FontFamily.GenericMonospace, 6f, FontStyle.Regular, GraphicsUnit.Point, 1, false), Brushes.Black, jointPoint);
}
//Draw the panels and links //TODO: (Trello: Improve math behind visualizer)
foreach (AnsMember member in objToDraw.AnsMembers)
{
List<AnsPanel> panels = member.Panels; //Drawing the panels
foreach (AnsPanel pan in panels)
{
pen.Color = Color.Red;
PointF p1 = this.ToCartesian(new PointF((float)pan.I.Location.X.Length, (float)pan.I.Location.Y.Length), maxHeight);
PointF p2 = this.ToCartesian(new PointF((float)pan.J.Location.X.Length, (float)pan.J.Location.Y.Length), maxHeight);
g.DrawEllipse(pen, p1.X - 2.5f, p1.Y - 2.5f, 5, 5);
g.DrawEllipse(pen, p2.X - 2.5f, p2.Y - 2.5f, 5, 5);
g.DrawEllipse(pen, p1.X - 3, p1.Y - 3.3f, 5, 5);
g.DrawEllipse(pen, p2.X - 3, p2.Y - 3.3f, 5, 5);
pen.Color = Color.Black;
g.DrawLine(pen, p1, p2);
}
List<AnsLink> links = member.Links; //Drawing the links
foreach (AnsLink link in links)
{
PointF p1 = this.ToCartesian(new PointF((float)link.I.Location.X.Length, (float)link.I.Location.Y.Length), maxHeight);
PointF p2 = this.ToCartesian(new PointF((float)link.J.Location.X.Length, (float)link.J.Location.Y.Length), maxHeight);
g.FillEllipse(Brushes.Green, p1.X - 1.5f, p1.Y - 1.5f, 3, 3);
g.FillEllipse(Brushes.Green, p2.X - 1.5f, p2.Y - 1.5f, 3, 3);
g.DrawLine(pen, p1, p2);
}
}
pictureBox1.Tag = entry.FileName;
}
if (isDraw && entry.TreComponentRead != null)
{
//Preparing to draw
Graphics g = e.Graphics;
g.ScaleTransform(2f, 2f);
g.SmoothingMode = SmoothingMode.AntiAlias;
g.InterpolationMode = InterpolationMode.Bicubic;
TreComponent objToDraw = entry.TreComponentRead;
Pen pen = new Pen(Color.Black);
int maxWidth = 0, maxHeight = 0;
foreach (Member member in objToDraw.Members)
{
foreach (GeometryClassLibrary.Point p in member.Geometry.Vertices)
{
if (p.X.Inches > maxWidth)
{
maxWidth = (int)p.X.Inches;
}
if (p.Y.Inches > maxHeight)
{
maxHeight = (int)p.Y.Inches;
}
}
}
maxHeight += 5; maxWidth += 5;
maxHeight += 15; maxWidth += 5;
foreach (Member member in objToDraw.Members)
{
List<PointF> pointsToDraw = new List<PointF>();
foreach (GeometryClassLibrary.Point p in member.Geometry.Vertices)
{
pointsToDraw.Add(ToCartesian(new PointF((float)p.X.Inches, (float)p.Y.Inches), maxHeight));
PointF pointToDraw = this.ToCartesian(new PointF((float)p.X.Inches, (float)p.Y.Inches), maxHeight);
g.FillEllipse(Brushes.Red, pointToDraw.X - 1.5f, pointToDraw.Y - 1.5f, 3, 3);
pointsToDraw.Add(pointToDraw);
}
g.DrawPolygon(pen, pointsToDraw.ToArray());
//Getting center of member and labeling member
float totalX = 0, totalY = 0;
foreach (PointF p in pointsToDraw)
{
totalX += p.X;
totalY += p.Y;
}
float centerX = totalX / pointsToDraw.Count;
float centerY = totalY / pointsToDraw.Count - 10;
PointF midPoint = new PointF(centerX, centerY);
g.DrawString(member.Name, new Font(FontFamily.GenericMonospace, 6f, FontStyle.Regular, GraphicsUnit.Point, 1, false), Brushes.Black, midPoint);
}
pictureBox1.Tag = entry.FileName;
}
}
I am working on a project where I have to align series of images so for that I use lines created using bitmap. Now user can move and rotate this line in anywhere inside panel which has that image as background. Now I have already tried to make panel double buffered which solves the problem of background snapshot while rotating, but when I move that line it takes a piece of background with it. I also tried to refresh panel but that's not working.
Heres the code:
private bool _rotating;
private bool _dragging;
private int _clickX;
private int _clickY;
private Point _clickCoords;
private int _middleX;
private int _middleY;
private int _centerX;
private int _centerY;
private double _radius;
private DateTime lastRotate = DateTime.Today;
public void UpdateCircle(Line l)
{
_centerX = (l.EndPoint.X + l.StartPoint.X) / 2 + l.Left;
_centerY = (l.EndPoint.Y + l.StartPoint.Y) / 2 + l.Top;
_radius = GetDistance(l.StartPoint.X, l.StartPoint.Y, l.EndPoint.X, l.EndPoint.Y) / 2;
// panel5.Refresh();
}
public void UpdateMiddle(Line l)
{
_middleX = (l.EndPoint.X + l.StartPoint.X) / 2;
_middleY = (l.EndPoint.Y + l.StartPoint.Y) / 2;
// panel5.Refresh();
}
public double GetDistance(double x1, double y1, double x2, double y2)
{
return Math.Sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
}
public void LineMouseDown(object sender, MouseEventArgs e)
{
var l = (Line)sender;
if (GetDistance(e.X, e.Y, l.StartPoint.X, l.StartPoint.Y) < 30 ||
GetDistance(e.X, e.Y, l.EndPoint.X, l.EndPoint.Y) < 30)
{
_rotating = true;
}
else
{
_dragging = true;
panel5.Refresh();
}
_clickX = e.X;
_clickY = e.Y;
panel5.Refresh();
_clickCoords = new Point(l.Left + e.X, l.Top + e.Y);
UpdateCircle(l);
UpdateMiddle(l);
// panel5.Refresh();
}
public void LineMouseUp(object sender, MouseEventArgs e)
{
_rotating = false;
_dragging = false;
panel5.Refresh();
}
public void LineMouseMove(object sender, MouseEventArgs e)
{
// panel5.Refresh();
var l = (Line)sender;
if (_rotating)
{
if ((DateTime.Now - lastRotate).TotalMilliseconds > 60)
{
try
{
var angle = GetAngle(l.Left + e.X, l.Top + e.Y, _centerX, 0, _centerX, _centerY);
var newStartPoint = new Point(
(int)Math.Round(_middleX + _radius * Math.Sin(angle)),
(int)Math.Round(_middleY + _radius * Math.Cos(angle))
);
var newEndPoint = new Point(2 * _middleX - newStartPoint.X, 2 * _middleY - newStartPoint.Y);
l.SetPoints(newStartPoint, newEndPoint);
UpdateMiddle(l);
lastRotate = DateTime.Now;
}
catch
{
//ignored
}
}
}
else if (_dragging)
{
l.Left = l.Left + e.X - _clickX;
l.Top = l.Top + e.Y - _clickY;
// panel5.Refresh();
}
}
public double GetAngle(int x2, int y2, int x1, int y1, int x0, int y0)
{
double angle = Math.Atan2(y1 - y0, x1 - x0) - Math.Atan2(y2 - y0, x2 - x0);
return angle;
}
And heres how I create lines:
bitLine = new Line { LineColor = Color.Red, LineWidth = 2, StartPoint = new Point(x1, y1), EndPoint = new Point(x2, y2) };
bitLine2 = new Line { LineColor = Color.Red, LineWidth = 2, StartPoint = new Point(x1, y1), EndPoint = new Point(x2, y2) };
//bitLine.Cursor = Cursors.SizeAll;
bitLine.MouseDown += LineMouseDown;
bitLine.MouseUp += LineMouseUp;
bitLine.MouseMove += LineMouseMove;
bitLine2.MouseDown += LineMouseDown;
bitLine2.MouseUp += LineMouseUp;
bitLine2.MouseMove += LineMouseMove;
bitLine2.Click += bitLine2_Click;
bitLine.Click += bitLine_Click;
panel5.Controls.Add(bitLine);
panel5.Controls.Add(bitLine2);
pb.WireControl(bitLine);
pb.WireControl(bitLine2);
bitLine.Location = Program.line1_location;
bitLine2.Location = Program.line2_location;
So please any suggestions will be helpful. I am really stuck in this.
Here is screenshot of what is the problem
This is the code I have so far:
private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
{
int maxX, minX, maxY, minY;
minX = pictureBox2.Location.X;
minY = pictureBox2.Location.Y;
maxX = (pictureBox2.Size.Width) + minX;
maxY = (pictureBox2.Size.Height) + minY;
Point PictureLocation = new Point(e.X, e.Y);
if ( (PictureLocation.X <= maxX)
&& (PictureLocation.X >= minX)
&& (PictureLocation.Y <= maxY)
&& (PictureLocation.Y >= minY) )
{
MessageBox.Show("The drag is working");
//Rest of the program is fine
}
else
{
MessageBox.Show("Please re-drag the item into the area");
}
}
At the moment all it comes up with is the else statement and I can't quite figure out why.
ADDITIONAL:
If it helps, I am also using a faint form during the drag in this way which could effect the position as I've found that the ABOVE CODE HAS A CORRECT ZONE to the right and below of where I need it:
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
mdown = e.Location;
form2.BackgroundImageLayout = ImageLayout.Zoom;
form2.BackgroundImage = pictureBox1.Image;
form2.Opacity = 0.5f;
form2.MaximizeBox = false;
form2.ControlBox = false;
form2.Text = "";
form2.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;
form2.Size = new Size(150, 150);
form2.Show();
Point pt = pictureBox1.PointToScreen(pictureBox1.Location);
form2.Location = pt;
}
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
if (e.Button == System.Windows.Forms.MouseButtons.Left)
{
Point pt = pictureBox1.PointToScreen(new Point(-(form2.Width / 2) + e.X, -(form2.Height / 2) + e.Y));
form2.Location = pt;
}
}
The point you are given by e.X and e.Y is relative to the control that raised the event (the picturebox).
So you actually want:
minX = 0;
minY = 0;
maxX = pictureBox2.Size.Width;
maxY = pictureBox2.Size.Height;
as the first picture box was taking a datum at it's own location 0,0, so by using that, and the fact that my pictureboxes are on the same y location starting you get this:
minX = (pictureBox2.Location.X)-(pictureBox1.Location.X);
minY = 0;
maxX = ((pictureBox2.Location.X) - (pictureBox1.Location.X)) + (pictureBox2.Width);
maxY = 0 + (pictureBox2.Height);
Thanks for everyone's help!
I am messing with this for the first time. I am going for something like Gyazo does. I have the code below but it won't actually capture the image. It is a bit late and I am a bit tired so could be missing something awfully easy. What it does now is just prints an empty picture at some random size.
private Point start = Point.Empty;
private Point end = Point.Empty;
private void Form2_MouseDown(object sender, MouseEventArgs e)
{
start.X = e.X;
start.Y = e.Y;
}
private void Form2_MouseMove(object sender, MouseEventArgs e)
{
Point p1;
Point p2;
if (((e.Button & MouseButtons.Left) != 0) && (start != Point.Empty))
{
using (Graphics g = this.CreateGraphics())
{
p1 = PointToScreen(start);
end.X = e.X;
end.Y = e.Y;
p2 = PointToScreen(end);
Console.WriteLine(end);
}
}
}
private void Form2_MouseUp(object sender, MouseEventArgs e)
{
Point p1;
Point p2;
Console.WriteLine("Mouse Up");
if ((end != Point.Empty) && (start != Point.Empty))
{
using (Graphics g = this.CreateGraphics())
{
p1 = PointToScreen(start);
p2 = PointToScreen(end);
int x1 = p1.X;
int y1 = p1.Y;
int x2 = p2.X;
int y2 = p2.Y;
using (Bitmap bmpScreenCapture = new Bitmap(x1,y1))
{
using (Graphics gra = Graphics.FromImage(bmpScreenCapture))
{
gra.CopyFromScreen(x1, y1, x2, y2, bmpScreenCapture.Size, CopyPixelOperation.SourceCopy);
bmpScreenCapture.Save("test.png", ImageFormat.Png);
Console.WriteLine("Image Saved");
}
}
}
}
start = Point.Empty;
end = Point.Empty;
Console.WriteLine("Image Saved1");
}
The pictures: http://imgur.com/zcDMbgk,wH1k0uP,PIsiQjw#1 OF course there is nothing there but that shows its printing something at some size.
I have made a slight mistake in calculations.
New Code that works wonders.
#region ============================Dragging============================
private Point start = Point.Empty;
private Point end = Point.Empty;
private void Form2_MouseDown(object sender, MouseEventArgs e)
{
start.X = e.X;
start.Y = e.Y;
}
private void Form2_MouseMove(object sender, MouseEventArgs e)
{
Point p1;
Point p2;
if (((e.Button & MouseButtons.Left) != 0) && (start != Point.Empty))
{
using (Graphics g = this.CreateGraphics())
{
p1 = PointToScreen(start);
end.X = e.X;
end.Y = e.Y;
p2 = PointToScreen(end);
Console.WriteLine(end);
}
}
}
private void Form2_MouseUp(object sender, MouseEventArgs e)
{
Point p1;
Point p2;
Console.WriteLine("Mouse Up");
if ((end != Point.Empty) && (start != Point.Empty))
{
using (Graphics g = this.CreateGraphics())
{
p1 = PointToScreen(start);
p2 = PointToScreen(end);
int x1 = p1.X;
int y1 = p1.Y;
int x2 = p2.X;
int y2 = p2.Y;
int x = x1 - x2;
int y = y1 - y2;
Console.WriteLine(x);
Console.WriteLine(y);
string[] xsp = x.ToString().Split('-');
string[] ysp = y.ToString().Split('-');
int rx = Convert.ToInt32(xsp[1]);
int ry = Convert.ToInt32(ysp[1]);
using (Bitmap bmpScreenCapture = new Bitmap(rx, ry, g))
{
using (Graphics gra = Graphics.FromImage(bmpScreenCapture))
{
gra.CopyFromScreen(x1, y1, 0, 0, bmpScreenCapture.Size, CopyPixelOperation.SourceCopy);
string filename = GenerateRandomString(20) + ".png";
bmpScreenCapture.Save(Path.GetTempPath() + "" + filename, ImageFormat.Png);
Upload(Path.GetTempPath() + "" + filename, filename);
}
}
}
}
start = Point.Empty;
end = Point.Empty;
}
#endregion