Develop Reference

Creating vertical lines inside panel in WinForm

I am trying to create vertical lines inside a panel in my winform application. I am able to draw the lines but they are not what I am expecting to be. My requirements are:
The lines must be drawn from the middle of the panel vertically.
The lines must be drawn on both the sides with equal height.
The problem is when I am trying to draw the lines they are drawn from top of the panel and are upside down.
My target is to get something like:
This is how I am trying to do it:
public void DrawLines(System.Drawing.Graphics g, float height)
{
Pen thePen = new Pen(Color.Red, 1.0F);
PointF[] points1 =
{
new PointF(5,5),
new PointF(5, 50)
};
PointF[] points2 =
{
new PointF(7,5),
new PointF(7, 60)
};
PointF[] points3 =
{
new PointF(9,5),
new PointF(9, 55)
};
//Tried this as well
//PointF[] points1 =
// {
// new PointF(5,50),
// new PointF(5, 5)
// };
//PointF[] points2 =
// {
// new PointF(7,60),
// new PointF(7, 5)
// };
//PointF[] points3 =
// {
// new PointF(9,55),
// new PointF(9, 5)
// };
g.DrawLines(thePen, points1);
g.DrawLines(thePen, points2);
g.DrawLines(thePen, points3);
}
Right now I am calling this function on button click.
DrawLines(panel1.CreateGraphics(), 20.0F);
In real time this will be called inside a loop and line height will be passed as a parameter.

As already commented, Y coordinates are flipped when drawing on the Panel. You can test this by simply displaying mouse coordinates.
To draw the Lines you want to get the Middle of the panel and work from there. In your example you had an unused height variable, so i added funtionality to that. Here is a working example.
public MyForm()
{
InitializeComponent();
_myPen = new Pen(Color.Red, 1.0F);
}
private Pen _myPen;
private void DrawLines(Graphics g, int width = 0, int height = 0)
{
// Get the middle of the panel
int panelMiddle = panel.Height / 2;
// Lines going up from the mittle
g.DrawLines(_myPen,
new PointF[]
{
new PointF(width + 5, height + panelMiddle -5),
new PointF(width + 5, height + panelMiddle - 50)
});
g.DrawLines(_myPen,
new PointF[]
{
new PointF(width + 7, height + panelMiddle-5),
new PointF(width + 7, height + panelMiddle - 60)
});
g.DrawLines(_myPen,
new PointF[]
{
new PointF(width + 9, height + panelMiddle-5),
new PointF(width + 9, height + panelMiddle - 55)
});
// Lines going down from the middle
g.DrawLines(_myPen,
new PointF[]
{
new PointF(width + 5, height + panelMiddle +5),
new PointF(width + 5, height + panelMiddle + 50)
});
g.DrawLines(_myPen,
new PointF[]
{
new PointF(width + 7, height + panelMiddle+5),
new PointF(width + 7, height + panelMiddle + 60)
});
g.DrawLines(_myPen,
new PointF[]
{
new PointF(width + 9, height + panelMiddle+5),
new PointF(width + 9, height + panelMiddle + 55)
});
}
private void panel_Paint(object sender, PaintEventArgs e)
{
DrawLines(e.Graphics);
DrawLines(e.Graphics,panel.Width - 14);
}

How to slice sprite by script ?(not use Editor)

I trying to slice Sprite(type casted to Texture2D) by script,
when project is running on Android or IOS Platform
is it possible by script??
I trying to use UnityEditor Class and it is work on Computer
but When I trying to Build Android or IOS It is failed.
void OnPreprocessTexture()
{
TextureImporter textureImporter = (TextureImporter)assetImporter;
textureImporter.textureType = TextureImporterType.Sprite;
textureImporter.spriteImportMode = SpriteImportMode.Multiple;
textureImporter.mipmapEnabled = false;
textureImporter.filterMode = FilterMode.Point;
}
public void OnPostprocessTexture(Texture2D texture)
{
Debug.Log("Texture2D: (" + texture.width + "x" + texture.height + ")");
int spriteSize = 350;
int colCount = texture.width / spriteSize;
int rowCount = texture.height / spriteSize;
List<SpriteMetaData> metas = new List<SpriteMetaData>();
for (int r = 0; r < rowCount; ++r)
{
for (int c = 0; c < colCount; ++c)
{
SpriteMetaData meta = new SpriteMetaData();
meta.rect = new Rect(c * spriteSize, r * spriteSize, spriteSize, spriteSize);
meta.name = c + "-" + r;
metas.Add(meta);
}
}
TextureImporter textureImporter = (TextureImporter)assetImporter;
textureImporter.spritesheet = metas.ToArray();
}
public void OnPostprocessSprites(Texture2D texture, Sprite[] sprites)
{
Debug.Log("Sprites: " + sprites.Length);
}
It is not working When running project on Android or IOS
[What I want]
Procedure
During running on Android or IOS Platform
1) Receive some Images from server (Url or file)
2) Load Image on C# script
3) Change type Images to Texture or Sprite ect...
4) Slice Images(Don't use Editor)
5) Save Pieces of Image
6) Use piece of Image
What I want is all procedure worked by Script

TextureImporter belongs to the UnityEditor namespace which doesn't exist in a built app but only within the Unity Editor itself. → You can not use this!
What you can do is using Sprite.Create to generate a sprite from a given Texture2D.
Cropping
If it is actually only about cutting out a certain part of the texture to use it as sprite than you only need to define in the rect parameter the part of the texture you want to use from that image.
// Wherever you get the texture from
Texture texture = ...;
// E.g. for using the center of the image
// but half of the size
var rect = new Rect(texture.width / 4, texture.height / 4, texture.width / 2, texture.height / 2);
// Create the sprite
var sprite = Sprite.Create(texture, rect, Vector2.one * 0.5f);
where rect is the
Location of the Sprite on the original Texture, specified in pixels.
Slicing
If you additionally want a slicing border (which you usually define in the Sprite Editor within Unity) there is an overload of Sprite.Create that additionally takes a border parameter e.g.
var borders = new Vector4(2, 2, 2, 2);
var sprite = Sprite.Create(texture, rect, Vector2.one * 0.5f, 100, SpriteMeshType.FullRect, borders);
where border
Returns the border sizes of the sprite.
X=left, Y=bottom, Z=right, W=top.
API doesn't say it but I guess like the rect values those values are also in pixels.

I solved using rect and Sprite Rnederer
here is my code
void Start()
{
rect = new Rect(0f, 0f, 255, 255);
this.GetComponent<SpriteRenderer>().sprite = Sprite.Create(img, rect, new Vector2(0.5f, 0.5f));
this.GetComponent<RectTransform>().localScale = new Vector3(100, 100, 0);
StartCoroutine(Update());
}
/*
* rect = new Rect(i, 0, 255, 255);
this.GetComponent<SpriteRenderer>().sprite = Sprite.Create(img, rect, new Vector2(0.5f, 0.5f));*/
IEnumerator Update()
{
while (true)
{
if (i < 1000)
{
i += 255;
if (i > 770)
{
i = 0;
}
}
yield return new WaitForSeconds(0.25f);
rect = new Rect(i, 0f, 255, 255);
this.GetComponent<SpriteRenderer>().sprite = Sprite.Create(img, rect, new Vector2(0.5f, 0.5f));
}
}

Draw Rectangle in MonoGame

How do you draw shapes, such as Rectangles and Circles, in MonoGame without having to save the a predrawn shape in the Content folder?
DrawRectangle() and DrawEllipse() are for Windows Form and do not work in OpenGL, which is what I am using.

Use 3D primitives and a 2D projection
Here's a simple example with explanations
I define a 10x10 rectangle and set the world matrix to make it look like a 2D projection :
Note : the BasicEffect is what draws your primitive
protected override void LoadContent()
{
_vertexPositionColors = new[]
{
new VertexPositionColor(new Vector3(0, 0, 1), Color.White),
new VertexPositionColor(new Vector3(10, 0, 1), Color.White),
new VertexPositionColor(new Vector3(10, 10, 1), Color.White),
new VertexPositionColor(new Vector3(0, 10, 1), Color.White)
};
_basicEffect = new BasicEffect(GraphicsDevice);
_basicEffect.World = Matrix.CreateOrthographicOffCenter(
0, GraphicsDevice.Viewport.Width, GraphicsDevice.Viewport.Height, 0, 0, 1);
}
Then I draw the whole thing :D
protected override void Draw(GameTime gameTime)
{
GraphicsDevice.Clear(Color.CornflowerBlue);
EffectTechnique effectTechnique = _basicEffect.Techniques[0];
EffectPassCollection effectPassCollection = effectTechnique.Passes;
foreach (EffectPass pass in effectPassCollection)
{
pass.Apply();
GraphicsDevice.DrawUserPrimitives(PrimitiveType.LineStrip, _vertexPositionColors, 0, 4);
}
base.Draw(gameTime);
}
There you have your rectangle !
Now this is just the tip the of the iceberg,
To draw filled rectangles : draw 2 triangle primitives
For an ellipse/circle see these : Draw an Ellipse in XNA and Draw simple circle in XNA
Or as mentioned in one of the posts above you could use a shader that does it instead ...
I needed to draw a Superellipse a while ago and ended up sketching this shader :
Drawing a SuperEllipse in HLSL
As you can see in the post a Superellipse not only draws ellipse but also other shapes and maybe even circles (I did not test) so you might be interested in it.
Ultimately you will want some class/methods to hide all these details so you just have to invoke something like DrawCircle().
Tip : by posting # https://gamedev.stackexchange.com/ you will likely get more answers for Monogame-related questions
:D

If you need to create a rectangle in 2D you can just do this:
Color[] data = new Color[rectangle.Width * rectangle.Height];
Texture2D rectTexture = new Texture2D(GraphicsDevice, rectangle.Width, rectangle.Height);
for (int i = 0; i < data.Length; ++i)
data[i] = Color.White;
rectTexture.SetData(data);
var position = new Vector2(rectangle.Left, rectangle.Top);
spriteBatch.Draw(rectTexture, position, Color.White);
Might be a tad bit easier than Aybe's answer in some situations. This creates a solid rectangle.

I found a simple solution for drawing filled and non-filled shapes, I don't know if it's power consuming or not, but here it is anyway:
{
//Filled
Texture2D _texture;
_texture = new Texture2D(graphicsDevice, 1, 1);
_texture.SetData(new Color[] { Color.White });
spriteBatch.Draw(_texture, Rect, Color.White);
}
{
//Non filled
Texture2D _texture;
_texture = new Texture2D(graphicsDevice, 1, 1);
_texture.SetData(new Color[] { Color.White });
spriteBatch.Draw(_texture, new Rectangle(Rect.Left, Rect.Top, Rect.Width, 1), Color.White);
spriteBatch.Draw(_texture, new Rectangle(Rect.Right, Rect.Top, 1, Rect.Height), Color.White);
spriteBatch.Draw(_texture, new Rectangle(Rect.Left, Rect.Bottom, Rect.Width, 1), Color.White);
spriteBatch.Draw(_texture, new Rectangle(Rect.Left, Rect.Top, 1, Rect.Height), Color.White);
}

Ownerdrawn TreeView (WinForms)

I have a TreeView control with checkboxes which is completely owner drawn (DrawMode = TreeViewDrawMode.OwnerDrawAll).
What I'm trying to do is to have the checkboxes owner drawn, so that they can have a grayed state. I'm using VisualStyleRenderer for this.
The problem arises when I have to correctly place the expand/collapse glyph and the checkbox in the item bounds, because the "hit-test areas" for both the glyph and the checkbox seems to be unknown and unchangeable.
Is there a way to get the bounds of those areas, or to replace the default ones with custom values?

I ran into the same problem. You have to offset your drawing by the proper amount, which is predictable.
There's probably more here than you need, but here's my drawing for a custom tree I used alongside a calendar control:
private void TreeViewControl_DrawNode(Object sender, DrawTreeNodeEventArgs e)
{
//What might seem like strange positioning/offset is to ensure that our custom drawing falls in
// line with where the base drawing would appear. Otherwise, click handlers (hit tests) fail
// to register properly if our custom-drawn checkbox doesn't fall within the expected coordinates.
Int32 boxSize = 16;
Int32 offset = e.Node.Parent == null ? 3 : 21;
Rectangle bounds = new Rectangle(new Point(e.Bounds.X + offset, e.Bounds.Y + 1), new Size(boxSize, boxSize));
ControlPaint.DrawCheckBox(e.Graphics, bounds, e.Node.Checked ? ButtonState.Checked : ButtonState.Normal);
if (e.Node.Parent != null)
{
Color c = Color.Black;
String typeName = e.Node.Name.Remove(0, 4);
Object o = Enum.Parse(typeof(CalendarDataProvider.CalendarDataItemType), typeName);
if (o != null && (o is CalendarDataProvider.CalendarDataItemType))
c = CalendarDataProvider.GetItemTypeColor((CalendarDataProvider.CalendarDataItemType)o);
bounds = new Rectangle(new Point(bounds.X + boxSize + 2, e.Bounds.Y + 1), new Size(13, 13));
using (SolidBrush b = new SolidBrush(c))
e.Graphics.FillRectangle(b, bounds);
e.Graphics.DrawRectangle(Pens.Black, bounds);
e.Graphics.DrawLine(Pens.Black, new Point(bounds.X + 1, bounds.Bottom + 1), new Point(bounds.Right + 1, bounds.Bottom + 1));
e.Graphics.DrawLine(Pens.Black, new Point(bounds.Right + 1, bounds.Y + 1), new Point(bounds.Right + 1, bounds.Bottom + 1));
}
Font font = new Font("Microsoft Sans Serif", 9f, e.Node.Parent == null ? FontStyle.Bold : FontStyle.Regular);
bounds = new Rectangle(new Point(bounds.X + boxSize + 2, e.Bounds.Y), new Size(e.Bounds.Width - offset - 2, boxSize));
e.Graphics.DrawString(e.Node.Text, font, Brushes.Black, bounds);
}

Animated bar in progress bar winform

I'm writing an extended progress bar control at present, 100% open source and I've created some basic styles with gradients and solid colours.
One of the options I wanted to add was animation to the bar, prety much like the windows 7 and vista green progress bar. So I need to add a moving "Glow" to the % bar, however my attempt at this looks terrible.
My method is to draw an ellipse with set size and move it's x position until it reaches the end were the animation starts again.
First of does anyone have nay links or code to help me achieve the current windows 7 glow effect using GDI or some similar method?
I have several other animations that will also be added the the bar hence the GDI.
private void renderAnimation(PaintEventArgs e)
{
if (this.AnimType == animoptions.Halo)
{
Rectangle rec = e.ClipRectangle;
Rectangle glow = new Rectangle();
//SolidBrush brush = new SolidBrush(Color.FromArgb(100, Color.White));
//int offset = (int)(rec.Width * ((double)Value / Maximum)) - 4;
int offset = (int)(rec.Width / Maximum) * Value;
if (this.animxoffset > offset)
{
this.animxoffset = 0;
}
glow.Height = rec.Height - 4;
if (this.animxoffset + glow.X > offset)
{
glow.Width = offset - (this.animxoffset + 50);
}
else
{
glow.Width = 50;
}
glow.X = this.animxoffset;
LinearGradientBrush brush = new LinearGradientBrush(glow, Color.FromArgb(0, Color.White), Color.FromArgb(100, Color.White), LinearGradientMode.Horizontal);
e.Graphics.FillEllipse(brush, this.animxoffset, 2, glow.Width, glow.Height);
brush.Dispose();
string temp = offset.ToString();
e.Graphics.DrawString(temp + " : " + glow.X.ToString(), DefaultFont, Brushes.Black, 2, 2);
animTimer = new System.Timers.Timer();
animTimer.Interval = 10;
animTimer.Elapsed += new System.Timers.ElapsedEventHandler(t_Elapsed);
animTimer.Start();
}
}
void t_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
{
this.animTimer.Stop();
this.animxoffset += 2;
Invalidate();
}

This is just an example glow iterating through a pen array.
You could also use a transparent image (although it could have a performance impact).
Pen[] gradient = { new Pen(Color.FromArgb(255, 200, 200, 255)), new Pen(Color.FromArgb(150, 200, 200, 255)), new Pen(Color.FromArgb(100, 200, 200, 255)) };
int x = 20;
int y = 20;
int sizex = 200;
int sizey = 10;
int value = 25;
//draw progress bar basic outline (position - 1 to compensate for the outline)
e.Graphics.DrawRectangle(Pens.Black, new Rectangle(x-1, y-1, sizex, sizey));
//draw the percentage done
e.Graphics.FillRectangle(Brushes.AliceBlue, new Rectangle(x, y, (sizex/100)*value, sizey));
//to add the glow effect just add lines around the area you want to glow.
for (int i = 0; i < gradient.Length; i++)
{
e.Graphics.DrawRectangle(gradient[i], new Rectangle(x - (i + 1), y - (i + 1), (sizex / 100) * value + (2 * i), sizey + (2 * i)));
}