draw erd

Well.. 1 more to get the perseverance badge, today to draw you a relatively simple view.Reprint Please specify source: http://blog.csdn.net/wingichoy/article/details/50477108Don't say much nonsense, look:First, the constructor measures ... Here's a pen.Public Errorview (Context context) {This (context, NULL); } public Errorview (context context, AttributeSet Attrs) {This (context, attrs, 0); } public Errorview (context context, AttributeSet att

Demo function: Use a program to draw a pie chart demo. Demo Description: draws a pie chart based on the given title array, value array, and color array. The main code is in CLMView. m. Demo screenshot: Demo main code: drawing part [Csharp]-(Void) drawRect :( CGRect) rect{CGContextRef context = UIGraphicsGetCurrentContext ();// Cgcontextsets// Anti-aliasingCGContextSetAllowsAntialiasing (context, TRUE );// Int arr [5] = {20, 15, 35, 85, 60 };Float s

draw the curve, it is to click a to drag to a and then click b to drag to C which is to determine the B form AB this curve, so, in general, using a pen to draw a curve is done by dragging, unlike some of the curve-drawing tools in three-dimensional software that are implemented by placing a a b b, The advantage of this method of rendering Illustrator is that it feels easier to control (it feels like two po

The code is as follows:Import Java.awt.Color;Import Java.awt.Graphics;Import java.awt.event.KeyEvent;Import Java.awt.event.KeyListener;Import Javax.swing.JFrame;Import Javax.swing.JPanel;/*** @author Brucelong* Draw the King eight and set the keyboard listener event* */public class Turtlemove {public static void Main (string[] args) {1. Create a form, size 1366*768JFrame frame = new JFrame ();Frame.setsize (1366, 768);/*//

corner. Baidu took a, found a beautiful picture, according to the introduction of Niang, its name is old wet, dress is very cool, so decided to use her. As for this sister is not really old wet, I did not verify, after all, I do not know the old wet ah, if the name is wrong, welcome well-informed netizens, help me point out, in this first thanks. First of all, open the original image, copy a layer, the implementation of color separation, the value of their own to do, I use here is 7, this lay

To the users of the illustrator software to explain the detailed analysis of the design of a lovely rabbit painting tutorial. Tutorial Sharing: 1. Create head and face 1th Step First, we're going to create the head. Start using the Ellipse tool (L) a gray circle (R = 236, G = 230, B = 222). Then, use the Direct selection tool (A) to turn left and right anchor a little bit down. Step 2 After that we're going to create the eyes. Use th

To give you painter software users to detailed analysis to share the painting star Angelina Zhu Li Portrait of the tutorial. Tutorial Sharing: 1. The new layer is first shaped with a 2B pencil. Drafting is very important, do not put the picture below, because it is not fun to draw, lost the sense of recycling painting. Because even if you hit the back of the shape will be with your own emotional color, this is not the same as the p

Case Appreciation The network often use a series of icons, the television must be very familiar with, and now also popular podcasts and so on, we all have the opportunity to use. The effect is shown in the following illustration: Thinking analysis Watching the TV carefully, you will find nothing but a cuboid, which we can see up to three faces, front, side, top, and old-fashioned TV opportunities for more than two antennas. To make it lively and lovely, we can use the Vector pen tool to

Citation: http://blog.csdn.net/carlfan/article/details/81399841, first say the canvas class:Class OverviewThe Canvas class holds the "draw" calls. To draw something, your need 4 basic components:a Bitmap to hold the pixels, A Canvas to host the draw calls (writing into The bitmap), a drawing primitive (e.g. Rect, Path, Text, bitmap), and a paint (to describe the

This article mainly introduces four methods for drawing an ellipse in HTML5Canvas. This article describes four methods, including parameter equation method, uniform compression method, cubic besell curve method, and grating method, for more information, see Overview Canvas in HTML5 does not directly provide the method for drawing an ellipse. The following is a summary of several painting methods. Various methods have advantages and disadvantages, which are selected as needed. The parameters of

Through the previous study, we can now draw graphics and text in HTML5Canvas and set some styles for them. We can also draw images in the canvas .,. HTML5 CANVAS: draw an image Through the previous study, we can now draw graphics and text in HTML5 canvas and set some styles for them. We can also . Used in T

equation to draw an elliptic --------------------- // The x and y parameters of the function are the center of the elliptic; the and B parameters are the cross and semi axes of the elliptic, // The length of the vertical and semi-axis, which cannot be 0 at the same time // The disadvantage of this method is that when the linWidth is wider and the ellipse is relatively flat // The end of the long axis inside the elliptical is sharp, insmooth, and

Draw transparent bitmap To draw a transparent bitmap, you can use a mask. The so-called mask is a black and white bitmap. It corresponds to the bitmap to be transparent. The mask describes the parts to be transparent in the bitmap, and the parts to be transparent are black, the opacity is white, and the white part is transparent. Assume that figure A is a transparent bitmap to be drawn, and Figure B is a ma

When an activity gets the focus, it is required to draw its layout (that is, the layout set by the setcontentview () method in the oncreate method ). The android Framework processes the painting process, but the activity must also provide the layout-level root node information of the view to be drawn. PS: The last sentence must be explained here. We all know that a layout file is an XML file containing multiple levels. The XML node information in it

Draw lines on canvasArticleIn, I talked about the method of drawing a straight line. The article on drawing a curve should have been published. However, because the canvas draw curve is special, I have not understood it yet, so I should try it step by step. One of the difficulties in drawing a curve in canvas is that there are four functions for connecting the curve! They areArc,Arcto,Quadraticcurveto,Bez

context.The cpaintdc is used in response to the window re-painting message (wm_paint) which is the drawing output. Cpaintdc calls beginpaint () in the constructor to obtain the device context, and CALLS endpaint () in the destructor to release the device context. In addition to releasing the device context, endpaint () is also responsible for clearing the wm_paint message from the message queue. Therefore, you must use cpaintdc when processing the window re-painting. Otherwise, the wm_paint mes

Draw lines in different windows using different methods Void CMyView: OnLButtonUp (UINT nFlags, CPoint point) {// TODO: Add your message handler code here and/or call default // MessageBox ("WM_LBUTTONUP "); /// 1: Use the global function of the SDK to implement the draw line function // HDC hdc; hdc =: GetDC (m_hWnd);: MoveToEx (hdc, m_ptOld.x, m_ptOld.y, NULL );: LineTo (hdc, point. x, point. y);: Release

Address: http://ogldev.atspace.co.uk/www/tutorial02/tutorial02.html When writing OpenGL programs, we usually need the glew library, which encapsulates various OpenGL extensions for our convenience. We can call the glew initialization function in the main function, and then we can query whether OpenGL extensions can be used. For functions that can be used, we can dynamically load them. In this tutorial, we will first understand the usage of vertex buffer objects (VBO, vertex buffer object. In t

A canvas element can be created, but if you do not set the parameters, it is not displayed on the browser. So you can set some parameters to let the canvas show up. In addition, the width of the canvas can be set within the label, if the width in the CSS, height, in fact, set the width of the canvas display, height. In addition, the height of the inside, the width is not set px, do not need to set these.How to work with canvas canvas requires the following actions in JavaScriptvar Canvas=documen

many), and error will be raised if the restore is called more times than save. 7. Drawtextonpath draws text on the specified path. 3. Code PackageCom.example.canvastest.view;ImportJava.util.Calendar;ImportAndroid.content.Context;ImportAndroid.graphics.Canvas;ImportAndroid.graphics.Color;ImportAndroid.graphics.Paint;Importandroid.graphics.Paint.Align;ImportAndroid.graphics.Paint.Style;ImportAndroid.graphics.Path;ImportAndroid.graphics.RectF;ImportAndroid.os.Handler;ImportAndroid.util.AttributeSe