chapter 5  interaction and event handling

**Chương 5: Xử lý sự kiện và tương tác** Chương này tập trung vào việc xử lý sự kiện và tương tác trong lập trình máy tính. Nó bao gồm các chủ đề trọng tâm như: * **Sự kiện:** Khái niệm về sự kiện, các loại sự kiện và các phương pháp xử lý sự kiện. * **Xử lý sự kiện:** Cơ chế đăng ký, hủy đăng ký và xử lý sự kiện. * **Tương tác người dùng:** Kỹ thuật thiết kế giao diện người dùng, xử lý đầu vào của người dùng và tích hợp các yếu tố tương tác trong ứng dụng. * **Kiểm tra và gỡ lỗi:** Kỹ thuật kiểm thử và gỡ lỗi các ứng dụng tương tác, đảm bảo tính mạnh mẽ và khả năng sử dụng. Chương này cung cấp nền tảng thiết yếu cho việc xây dựng các ứng dụng tương tác hiệu quả và thân thiện với người dùng.

Ngày tải lên: 29/03/2017, 18:21

... presented and used to model and design systems that have to meet stringent structural requirements The formalism of Petri Nets and Colored Petri Nets is used to depict intelligent nodes and the ... cf a role and show explicitly the inputs and outputs of the role In accordance with Petri Net conventions, [9] transitions are denoted by solid bars and they represent processes or events Signals ... Interactions Between Roles It was shown in Figs 3.2 and 3.3 that a role can only receive inputs at the SA, IF, and CI stages, and produce outputs at the SA and RS stages These conditions lead to the set

Ngày tải lên: 07/11/2013, 09:15

... biggest and most serious causes of coastal pollution are sewage disposal, and sedimentation from land-clearing and construction projects Pollution is changing coastal habitats and destroying fish and ... come from land and remain in water near the coastal areas Pollution from litter and chemicals is present in all the world’s oceans, from coastal areas to the open ocean Most of the trash and pollutants ... about ocean and coastal pollution Make sure students understand the sentences on the task sheet Pairs of students work together, reading and discussing the items on the task sheet, and marking

Ngày tải lên: 13/10/2016, 21:33

... understand – Medical law – Ethics – Health Insurance Portability and Accountability Act (HIPAA) 5-5 Introduction (cont.) • Basic knowledge of medical law and ethics – Rights, responsibilities, and ... HIPAA (cont.) • HIPAA Security Rule – Violations and penalties – Administrative simplification • Standardizing patient information • Standardized codes and formats – electronic transaction records ... shareholders and employees of the corporation 5-62 In Summary 5.1 A law is a rule of conduct or action Ethics are standards of behavior or concepts of right or wrong 5.2 Physician and patient rights and

Ngày tải lên: 22/05/2017, 16:43

... Confirmation Analytical Procedures (internal and external) (internal and external) (internal and external) (external) (external) • Follow Generally Accepted Auditing Standards (GAAS) 18 ... to ensure stronger and more ethical management 16 The Role of Auditors • Provide a check and balance • Internal Auditors – Ensure integrity in the financial records – Evaluate and encourage adherence ... Activities • Preventative Controls – Segregation of duties – Proper procedures for authorization – Physical control over assets and records • Detective Controls – Adequate documents and records

Ngày tải lên: 08/05/2018, 10:07

... is 1998, and Michael Jordan and the Bulls are about to play their final championship game You would very much like to attend The game is sold out, and you won’t have another It is 1998, and Michael ... and then indicate the options you prefer Decision A Choose between: a a sure gain of $240 b a 25 percent chance to gain $1,000 and a What Do People Choose? • Decision A • Decision B Framing and ... 1998, and Michael Jordan and the Bulls are about to play their final championship game You have a ticket to the game and would very much like to attend The game is sold out, and you What People Say

Ngày tải lên: 16/01/2020, 06:02

... Five Consumer and Business Buyer Behavior Roadmap: Previewing the Concepts Understand the consumer market and the major factors that influence consumer buyer behavior Identify and discuss the ... Offers good bikes, upgraded showrooms and sales tactics  Research has helped to understand customers’ emotions and motivation  Consumer emotions, motivations, and lifestyle have been translated ... Concepts Understand the consumer market and the major factors that influence consumer buyer behavior Identify and discuss the stages in the buyer decision process Describe the adoption and diffusion

Ngày tải lên: 18/01/2020, 21:52

... you understand rates of return? • B Do you know how to calculate return using scenario, probabilities, and other key statistics used to describe your portfolio? • C Do you understand the implications ... Client Standard Deviation Irwin / McGraw-Hill 18.9 27 © 2001 The McGraw-Hill Companies, Inc All rights reserved 36 Bodie • Kane • Marcus Essentials of Investments Problem 16: Maximizing Standard ... the reward-to-variability ratio (s) of your risky portfolio and your clients portfolio? – Reward to Variability (risk premium / standard deviation) – – Fund = (12.0% – 4%) / 25 = 32 Client =

Ngày tải lên: 03/02/2020, 17:58

... INELASTIC  DEMAND ELASTIC  DEMAND Decrease in  Price ELASTIC  DEMAND INELASTIC  DEMAND An Example of an Inelastic Good Oil? ?and? ?Oil Prices Insert Economics Video  This video will show  File 1? ?and? ?play Arab Oil  ... Inelastic Demand Percentage change in price is greater than  percentage change in quantity demand Price elasticity of demand is less than one Elastic Demand Percentage change in quantity demand is  ...  What is the percent change of the loss? What is the average of 300? ?and? ?330? What is  the midpoint? Computing the Price Elasticity of Demand Price elasticity of  demand = Percentage change in quatity demanded Percentage change in 

Ngày tải lên: 04/02/2020, 04:55

... Variety of Demand Curves • Inelastic Demand • Quantity demanded does not respond strongly to  price changes • Price elasticity of demand is less than one • ElasticDemand Quantitydemandedrespondsstronglytochangesin ... OF DEMAND • Price elasticity of demand is a measure of how  muchthequantitydemandedofagood respondstoachangeinthepriceofthatgood Priceelasticityofdemandisthepercentage changeinquantitydemandedgivenapercent ... APPLICATION OF SUPPLY, DEMAND, AND ELASTICITY • Examine whether the supply or demand curve  shifts • Determine the direction of the shift of the  curve • Use the supply? ?and? ?demand diagram to see  how the market equilibrium changes

Ngày tải lên: 04/02/2020, 15:17

... The expected benefits of a policy of redistribution should be carefully weighed against the possible negative effects it might have on labour supply and on savings and investment, and hence on economic growth in the long term ... Additive (or cardinal) welfare function – – • Ordinal function • Willingness to work – Income and substitution effects ((dis) incentive effect) • Taxation and subsidisation The expected benefits of a policy of redistribution should be carefully weighed ... • • • • • Distinguish between the Pareto and Bergson criteria for a welfare improvement Discuss Nozick’s entitlement theory and its relevance to the recent history of South Africa

Ngày tải lên: 04/02/2020, 17:10

... DeWolf Shear and Bending Moment Diagrams • Determination of maximum normal and shearing stresses requires identification of maximum internal shear force and bending couple • Shear force and bending ... section through the beam and applying an equilibrium analysis on the beam portions on either side of the section • Sign conventions for shear forces V and V’ and bending couples M and M’ © 2002 The ... For the timber beam and loading shown, draw the shear and bendmoment diagrams and determine the maximum normal stress due to bending • Section the beam at points near supports and load application

Ngày tải lên: 10/02/2020, 08:53

... subset of the set of positive integers has a least  element (see Section 5.2? ?and? ?Appendix 1). Here is  the proof: Suppose that P(1) holds? ?and? ?P(k) → P(k + 1) is  true for all positive integers k.  Assume there is at least one positive integer  n  ... greatest common divisor of two nonnegative integers  a? ?and? ? b with a  0 procedure  gcd(a,b:  Recursive Modular Exponentiation Algorithm    Example: Devise a  a recursive algorithm for computing    bn mod  m, where b, n,? ?and? ?m are integers with  m ≥ 2,   ... integers. Initially i is 1? ?and? ?j is n. We are searching for x procedure  binary search(i,  j, x : integers,   Proving Recursive Algorithms Correct  Both  mathematical? ?and? ?str0ng induction are useful 

Ngày tải lên: 14/10/2020, 14:55

... oldHandler = b.onclick; // Save the HTML event handler function newHandler( ) { /* My event- handling code goes here */ } // Now assign a new event handler that calls both the old and new handlers ... It stops capturing events and deregisters the handlers function upHandler (event) { // Stop capturing and handling drag events document.releaseEvents (Event. MOUSEMOVE | Event. MOUSEUP); document.onmousemove ... metaKey, and shiftKey properties of the DOM Level MouseEvent object and the IE Event object In the Netscape event model, an Event object is passed to all event handlers When an event handler is...

Ngày tải lên: 05/10/2013, 12:20

... non-causal and hence not physically realizable Instead we must compromise and accept a more gradual cutoff between passband and stopband, as well as specify a transition band between the passband and ... illustrated in Figure 5.1(a) The regions ! !c and ! > !c are referred to as the passband and stopband, respectively The frequency that separates the passband and stopband is called the cut-off frequency ... passband, the magnitude response has a peak deviation dp and in the stopband, it has a maximum deviation ds The frequencies !p and !s are the passband edge (cut-off) frequency and the stopband...

Ngày tải lên: 23/10/2013, 22:15

... as root and type the command: xf86config Figure 5.1 shows the beginning of the xf86config dialog As you can see, xf86config is a text-mode program; it does not support use of the mouse and it ... Starting and Stopping X Now that you've configured X by using xf86config, you're probably eager to see it work To start X, type the command: startx Your system's screen should briefly go blank and ... identifying an X server compatible with your graphics card, and tuning the server for your graphics card If you have a common card and all the documentation for it, this second stage will be...

Ngày tải lên: 07/11/2013, 10:15

... other hand we slide the same object on a very slippery surface such as ice, the object will travel a much larger distance before it stops Newton checked his ideas on the motion of the moon and the ... forces act on a body (say FA , FB , and FC ) the net force Fnet r r r r r r r r is defined as: Fnet = FA + FB + FC i.e Fnet is the vector sum of FA , FB , and FC Force: The concept of force was ... act on a body r r r r (say FA , FB , and FC ) the net force Fnet r r r r is defined as: Fnet = FA + FB + FC r i.e Fnet is the vector sum of r r r FA , FB , and FC (5-3) F mo ao F mX Mass: Mass...

Ngày tải lên: 13/12/2013, 05:15

... methods and other special class methods, and understanding when they are called  Subclassing UserDict to define classes that act like dictionaries  Defining data attributes and class attributes, and ... all the same keys and values, and strings are equal when they are the same length and contain the same sequence of characters For class instances, you can define the cmp method and code the comparison ... methods (like setitem ) and built-in attributes (like doc ) follow a standard naming convention: they both start with and end with two underscores Don't name your own methods and attributes this...

Ngày tải lên: 14/12/2013, 14:15

... Functions of the Stringhandling Library • String handling library provides functions to – – – – Manipulate string data Compare strings Search strings for characters and other strings Tokenize ... the Stringhandling Library • Copying strings – char *strcpy( char *s1, const char *s2 ) • Copies second argument into first argument – First argument must be large enough to store string and terminating ... the Stringhandling Library • Comparing strings – Characters represented as numeric codes • Strings compared using numeric codes – Character codes / character sets • ASCII – “American Standard Code...

Ngày tải lên: 22/01/2014, 02:20

... find an import that works Further Reading on Exception Handling * Python Tutorial discusses defining and raising your own exceptions, and handling multiple exceptions at once * Python Library Reference ... silently 6.2.3 Handling I/O Errors Now you've seen enough to understand the file handling code in the fileinfo.py sample code from teh previous chapter This example shows how to safely open and read ... takes a directory path and lists all files and directories in that directory The glob module, on the other hand, takes a wildcard and returns the full path of all files and directories matching...

Ngày tải lên: 26/01/2014, 08:20