scorpion drawing

calculation results are saved by setmeasureddimension (width, height).2. Layout operationThe layout action is used to set where the view appears on the screen. Defined as the final type in view, requires that the subclass cannot be modified. There are two basic operations in the layout () function:(1) setframe (l,t,r,b), l,t,r,b the specific position of the child view in the parent view, which is used to save these parameters;(2) OnLayout (), in view, this function does nothing, provided the fu

property contentscalefactor that identifies how many pixels a point containsB. Coordinate System Properties: (CGRect) bounds, (cgpoint) center, (cgrect) frame　　　　　　　　For view B:bounds = ((0,0), (200,250))frame = ((140,65), (320,320))Center = (300,225)Here you understand the concept that a view can be rotated in a parent view.Creating a ⑥ ViewStoryboard:dragCode:alloc initWithFrame (directly initialized to frame = Cgrectzero by using init)1 cgrect labelrect = CGRectMake (a); 2 UILabel *label =3

We assume that in the RGB video on the drawing (straight, rectangular, etc.), generally adopt a double buffer to continue, using memory MEMORYDC, to achieve the picture on the video display does not blink, but we know that the RGB display video is using GDI to render, which is very CPU-consuming, Then we can be in YUV video rendering, the answer is yes, using DDraw Direct display YUV is OK, can support yuv422 and yuv420 directly using the graphics car

In the previous articles we analyzed the activity and dialog loading drawing process, cancel the drawing process, I believe you have a perceptual understanding of the Windows drawing mechanism of the Android system, this article we will continue to analyze the Popupwindow loading drawing process.Before we analyze Popup

OverviewIn the previous article, the drawing process of the Android view (top)--view The measure process of the view is described in detail. For the entire process of drawing the view, after measuring the size of the view, you start to determine the location of the view and draw it to the screen. The layout and draw process of the view. So take a look at how these two processes are implemented.the layout pr

To the users of the illustrator software to share the detailed drawing of three-dimensional perspective of the tutorial. Tutorial Sharing: This paper introduces the method of drawing three-dimensional perspective drawing, which is also very characteristic and creative. Have a foundation of friends can see you have no use this idea, or is there

One of HTML5 's most welcome new features is the canvas element, which is responsible for setting an area in the page and then using JavaScript to make a dynamic drawing. Basic usage 　　　id= "Drawing" widht= "Max" height= " > a drawing of Somethind Canvas >After setting the canvas, go to the drawing con

1. Prelude:When drawing with turtle, you need to install the corresponding Python interpreter and IDE, I installed Pycharm, after installing Pycharm, in Pycharm install the corresponding library module, drawing can introduce turtle module, You can introduce NumPy modules if you want to perform operations.Note: Turtle is not supported in Pycharm, it may be a problem of dynamic language.The functions commonly

HTML5 is undoubtedly one of the most favored technologies, and each Web designer is enthusiastically discussing the rise of this magical markup language. HTML5 is an effortlessly learned markup language, but it can provide fascinating, artistic features that help web designers complete their ideation. HTML5 can be easily understood and mastered by a designer.Sketching and mapping is an important feature in the work of design workers. HTML5 will show a limitless future in this area.Today, I've co

Skills 　　previous section: Flash 8 new feature examples using Tips (3): Blending mode Part Four: Improvement of Flash 8 drawing tools Flash 8 's drawing tools also have some improvements, although there is no significant change in functionality, but there are many features that make it easier for us to draw lines or graphics in detail, and in this section we'll learn more about these features. ( download th

ios– drawing describes three ways to draw an image one. Subclass UIView, in DrawRect: Method drawingWhen you execute a method, the system creates the canvas itself (cgcontext), and the canvas is pushed to the top of the stackAfter execution, the system executes the pop out of the canvas.- (void)drawRect:(CGRect)rect{ CGContextRef con = UIGraphicsGetCurrentContext(); CGContextAddEllipseInRect(con, CGRectMake(0,0,100,100)); CGContextSetFillColo

using uml1-based modeling tools (such as IBM Rational Rose or IBM Rational Rose xde modeler/Developer, instead of simply using a general drawing tool.What is plotting?The term "plotting method" has been defined as a "technology or business that forms icons or maps ,"2. A map shows a region of the world by using a graphical representation of the scaled down ratio of the correct spatial location ."In this article, we will use the terminologyPlotting Me

C # drawing double buffered C # double buffering interpretation: Simply said when we are doing the drawing operation, the system does not directly render the content to the screen, but first in memory, and then output the results one time, if you do not use double buffering, you will find that in the process of drawing the screen will be very sharp, Because the b

The previous article has almost detailed the quartz2d of all the knowledge, this and the following is not nonsense, mainly with concrete examples to demonstrate the effect of the drawing.Here we first draw some simple graphs (such as lines, triangles, circles, rectangles, text, images), which can be drawn in two ways, one through context and the other through a path. The following is a demonstration of drawing triangles in two ways.to draw a basic gra

Title: PHP drawing basics Author: MoreWindowsBlog: blog. csdn. netMoreWindowsKeyWord: PHP painting point, line, Arc Drawing and fill area picture special effects color Christmas heavy snow pattern This article summarizes the commonly used PHP drawing functions. The content includes creating an image, assigning color, point, line, and arc to the image, Title: PHP

From: http://blog.csdn.net/leolee82/article/details/6992590 First, let's take a look at some structure and class related to drawing in MFC.1. Point(1) point structure point data structure point is used to represent the X and Y coordinates of a point:Typedef struct tagpoint {Long X;Long y;} Point; (2) Point-class cpointPoint class cpoint is an independent class without a base class. It encapsulates the point structure and has member variables X and

RRDtool (Round Robin Database tool) is a powerful drawing engine, and many tools, such as MRTG, can call RRDtool drawings. Including the use of a lot of cacti is also based on the rrdtool basis of drawing, can say cacti just provide a display graphics Web page.RRDtool: So-called round robin refers to a ring-shaped database: The data is stored in a ring form, and we can define for ourselves how long the data

Graphical device interface (GDI) and device description table (DC) Graphical device interface (GDI)MS-DOS manyProgramData is directly transferred to the video storage area or printer port,The disadvantage of this approach is that the corresponding driver needs to be provided for each display card or printer type.Windows provides an abstract interface called the graphical device interface (GDI ).Windows has provided drivers for various display cards and printers,In this way, our program does no

Transferred from: http://www.jizhuomi.com/software/244.htmlThe previous section speaks of the knowledge of text output, the main content of this section is the CDC class and its screen drawing functions.Introduction to CDC classesThe CDC class is a device context class.The CDC class provides member functions to handle device contexts such as displays or printers, as well as member functions that handle the display context associated with the window cl

At ordinary times in the process of editing documents with WPS, sometimes need to draw (insert) graphics in the document, to match the document to an event to help explain, in order to achieve simple, easy to understand the purpose. But in the course of the actual operation, sometimes seemingly simple graphics, can be drawn but difficult, because in the WPS drawing tool provided by the AutoShape, does not provide the corresponding graphics for our use