Charting with Databases DB Course

In most modern database applications some kind of graphical data representation is preferable or even required. For such purposes, Delphi includes several data-aware components: DBImage, DBChart, DecisionChart, etc. The DBImage is an extension to an Image component that displays a picture inside a BLOB field. Chapter 3  of this  database course  discussed displaying images (BMP, JPEG, etc.) inside an Access database with ADO and Delphi. The DBChart is a data-aware graphic version of the TChart component. Our goal in this chapter is to introduce the TDBChart by showing you how to integrate some basic charts into your Delphi ADO based application. TeeChart The DBChart component is a powerful tool for creating database charts and graphs. It is not only powerful but also complex. We wont be exploring all of its properties and methods, so youll have to experiment with it to discover all that it is capable of and how it can best suit your needs. By using the DBChart with the  TeeChart  charting engine you can quickly make graphs directly for the data in datasets without requiring any code. TDBChart connects to any Delphi DataSource. ADO recordsets are natively supported. No additional code is required—or just a little as youll see. The Chart editor will guide you through the steps to connect to your data—you dont even need to go to the Object Inspector. Runtime TeeChart libraries are included as part of Delphi Professional and Enterprise versions. TChart is also integrated with QuickReport with a custom TChart component on the QuickReport palette. Delphi Enterprise includes a DecisionChart control in the Decision Cube page of the Component palette. Preparing to Chart Our task will be to create a simple Delphi form with a chart filled with values from a database query. To follow along, create a Delphi form as follows: 1. Start a new Delphi Application—one blank form is created by default.   2. Place the next set of components on the form: ADOConnection, ADOQuery, DataSource, DBGrid, and a DBChart.   3. Use the Object Inspector to connect ADOQuery with ADOConnection, DBGrid with DataSource with ADOQuery.   4. Set up a link with our demo database (aboutdelphi.mdb) by using the ConnectionString of the ADOConnection component.   5. Select the ADOQuery component and assign the next string to the SQL property: SELECT TOP 5 customer.Company,SUM(orders.itemstotal) AS SumItems,COUNT(orders.orderno) AS NumOrdersFROM customer, ordersWHERE customer.custno orders.custnoGROUP BY customer.CompanyORDER BY SUM(orders.itemstotal) DESCThis query uses two tables: orders and customer. Both tables were imported from the (BDE/Paradox) DBDemos database to our demo (MS Access) database. This query results in a recordset with only 5 records. The first field is the Company name, the second (SumItems) is a sum of all the orders made by the company and the third field (NumOrders) represents the number of orders that were made by the company. Note that those two tables are linked in a  master-detail  relationship.6. Create a persistent list of database fields. (To invoke the Fields Editor double click the ADOQuery component. By default, the list of fields is empty. Click Add to open a dialog box listing the fields retrieved by the query (Company, NumOrders, SumItems). By default, all fields are selected. Sel ect OK.) Even though you dont need a persistent set of fields to work with a DBChart component - well create it now. The reasons will be explained later.   7. Set ADOQuery.Active to True in the Object Inspector to see the resulting set at design time.

Defining the Twenties in The Great Gatsby by F. Scott...

The Great Gatsby Literary Analysis The book, The Great Gatsby, was written by F. Scott Fitzgerald and it was published in 1925. This novel is one that defines the Twenties. The speaker of the book is a young man who goes by the name of Nick Carraway, who is from Minnesota. Throughout the book, he both narrates the story and casts himself as the author of this book. His father taught him to reserve judgment about other people that crossed his path. This is because if he deals with them through his moral standards, then he will misunderstand them and their purpose. In the summer of 1922, he has arrived in New York to work in the bond business. He rented a house in Long Island called West Egg. Nick has a next door neighbor named Jay Gatsby, who lives in a mansion and has parties every Saturday night. Nick was educated at Yale University and he has social connections at East Egg. One evening, Nick goes to dinner with his cousin, Daisy Buchanan, and her husband, Tom, one of Nickà ¢â‚¬â„¢s classmates at Yale. At dinner, Daisy and Tom introduce Nick to a beautiful young woman named Jordan Baker, and eventually Nick begins a relationship with her. Jordan also tells Nick that Tom has an affair with a girl from the valley of ashes called Myrtle Wilson. As the summer goes on, Nick gets an invitation to one of Gatsby’s parties. When he gets to the party, he finds that Jordan Baker is also there. Later in the party Jordan and Gatsby talk and Gatsby tells Jordan that he is deeplyShow MoreRelatedF. Scott Fitzgerald s The Great Gatsby1458 Words   |  6 Pages2016 â€Å"The Jazz Age† The iconic novel, The Great Gatsby, by F. Scott Fitzgerald, utilizes multiple songs throughout the story. â€Å"Fitzgerald’s wok has become automatically identified with an American decade: The Jazz Age (which he named) or the Roaring Twenties or The Boom.† (Fitzgerald, IX). The Twenties was a time full of exploration of alcohol and music and the move from small farms into large cities. â€Å"Since The Great Gatsby is the defining novel of the Twenties, which have become trivialized and vulgarizedRead MoreThe Great Gatsby By F. Scott Fitzgerald1684 Words   |  7 Pagesoneself is a defining connection between the central characters of The Great Gatsby, a timeless classic written by F. Scott Fitzgerald, set in a hedonistic summer of 1922 America, and Death of a Salesman, written by American playwright Arthur Miller set in 1949 America. The characterisation of both Willy and Gatsby illustrate that they have similarities, in a way that are considered destitute, with impe rfect ethical conduct. To a certain extent both protagonists have the right intentions; Gatsby wants toRead MoreThe Great Gatsby By F. Scott Fitzgerald1345 Words   |  6 PagesThe Great Gatsby (1925) is very modern in style due to the assortment of different techniques used by F. Scott Fitzgerald throughout the novel, in order to keep up with the trend of 20th century modern literature. Through the critical analysis of techniques used such as symbols, ideas, narration and characters we can explore in-depth to what extent that The Great Gatsby can be deemed as ‘modern’ in style. During the modernist period in the 1920’s, when The Great Gatsby was written, modernism wasRead MoreThe Great Gatsby By F. Scott Fitzgerald1674 Words   |  7 PagesThe Great Gatsby by F. Scott Fitzgerald is a novel that was published in 1925 which was a period known as the â€Å"roaring twenties†. During this period, America was witnessing a post war euphoria that was a companie d by prosperity, glamour, self-indulgence and excessive consumption (Bloomfield, p. 17). According to Bourdieu, America at that time was going through a gaudiest spree in history that was characterized by a lot of social change and mobility (p.2). For example, the stock market was gettingRead MoreThe Great Gatsby By F. Scott Fitzgerald1262 Words   |  6 Pages Many consider The Great Gatsby a beautiful love story. A literary review site, for example, says about Fitzgerald’s most famous work: â€Å"The Great Gatsby is probably F. Scott Fitzgerald s greatest novel [†¦] Gatsby is really nothing more than a man desperate for love†(The Great Gatsby Review). Popular opinion paints Gatsby as such: A man desperate for love, devoid of any evil. But a closer look uncovers a new side of Jay Gatsby because Gatsby, underneath his glorious faà §ade, is a sociopath. TheRead MoreEssay on F Scott Fitzgerald2010 Words   |  9 PagesF Scott Fitzgerald Influence plays a major role in the lives of all artists. Whether it is a painter, musician, or author, if they hadn’t been influenced in some way, their work would be nowhere near as compelling as it is. 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Scott Fitzgerald was published in 1925, when America was just coming out of one of the most violent wars in the nation’s history. World War 1 had taken the lives of many young people who fought and sacrificed for our country on another continent. The war left many families without fathers, sons, and husbands. The 1920s is an era filled with rich and dazzling history, where Americans experienced changes in lifestyle from m usicRead MoreThe Absolute Value Of America1555 Words   |  7 Pagesthat led up to today’s consumerist culture; the economic ups and downs of the 1920s through the 1950s, the anti-consumerist movement in the 1960s, and people’s obsession with material items in modern society. The 1920s, also known as the â€Å"Roaring twenties,† was a time of increased wealth and prosperity for some. After World War I, production in America increased dramatically due to inventions such as the assembly line and little to no government interference in business. 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Stefan’s Diaries Bloodlust Chapter 13 Free Essays

Damon. Death. The words swam in my mind as I tried to make sense of what I was seeing. We will write a custom essay sample on Stefan’s Diaries: Bloodlust Chapter 13 or any similar topic only for you Order Now Damon was alive. But who knew for how long? If he had been captured, he was undoubtedly weak. How could he face a ravenous beast in a battle and survive? Anger tore through my body, along with the familiar ache of my fangs elongating. I ripped down the sign with a snarl. â€Å"What is it?† she hissed, her own fangs bared. I held up the paper. â€Å"My brother,† I said, staring without comprehension at the poster. The picture made him look like a monster. My eye twitched. â€Å"The battle is in two days.† Lexi nodded, taking in the portrait. â€Å"Gallagher found him,† she said, almost to herself. I shook my head, not understanding what she meant. She sighed. â€Å"Big businessman. He owns a lot of places in town, including a two-bit circus and freak show. Always looking for curiosities to display, and people always seem to find the money to attend. Your brother–â€Å" â€Å"Damon,† I said, cutting her off. â€Å"His name is Damon.† â€Å"Damon,† Lexi said gently, tracing the image with her fingers. â€Å"He doesnt deserve this,† I said, almost to myself. â€Å"I need to help him. But † I trailed off. But what? How could I possibly save him? â€Å"Well need to find him,† Lexi decided. She brushed leaves and dirt from the back of her pants. â€Å"Do you trust me?† Did I have a choice? My hunger forgotten, I followed her through the forest and back to the wide, silent streets of the city. â€Å"Gallagher lives somewhere in the Garden District with all the other nouveaux riches. On Laurel Street, I think,† Lexi murmured as we wove our way to the center of town. â€Å"This has happened before, soon after Gallagher arrived in New Orleans five years ago.† â€Å"What happened?† I asked, following closely behind her in the shadows. â€Å"He found a vampire. Hes good at finding us. Or maybe were good at finding him. But the other vampire wasnt part of my family. And † She stopped suddenly. â€Å"What happened to him?† But Lexi merely shook her head. Wed arrived at the Garden District, where the streets were wide and the lawns hugging the sherbet-colored Victorian houses were lush and expansive. â€Å"Here.† She stopped at a pistachio-hued mansion enclosed by an open wrought-iron fence. Magnolias and calla lilies spilled over the gate, and the air smelled like mint. Just beyond, I could see an enormous herb garden that took up a fifth of the property. I recoiled as we walked closer, as the garden grew a generous amount of vervain. Lexi wrinkled her nose. â€Å"He knows all the tricks,† she said wryly. We pushed open the gate, our footsteps barely crunching the gravel on the path that circled the house. Cicadas buzzed in the sycamore trees above us, and I could hear horses pacing in the stable. And then I heard a low moan. â€Å"Hes out back,† I said. Lexi gazed up at the sky. Orange streaks were starting to peek above the horizon; it was about an hour until day broke. â€Å"Its too close to dawn,† Lexi said. â€Å"I didnt realize how late it is. I have to go.† I looked at her sharply. â€Å"Im not protected.† Her fingers fluttered to my ring, and I glanced down self-consciously. The lapus lazuli adornment had become so much a part of me, Id forgotten that it made me different from other vampires, made me able to walk in the daylight. Katherine had arranged for both Damon and me to have this protection. â€Å"Well come back tomorrow. The others can help us then,† Lexi insisted. I shook my head. â€Å"I cant leave him.† Birds chirped in the trees above us, and from somewhere nearby came the sound of glass shattering. The orange streaks in the sky grew fatter, brighter. â€Å"I understand,† Lexi said finally. â€Å"Be safe. Dont play the hero.† I nodded, scanning the grounds for any guards or animals lying in wait to attack. When I looked up, Lexi was gone and I was alone. Stealing quickly to the back of the house, I made my way toward the whitewashed stable. Horses pawed the ground nervously, obviously sensing my presence. The stable doors were padlocked with an iron bolt. I grabbed the chain, testing it. Even though Id barely fed since the previous evening, it would be easy enough to rend the chains with my bare hands. But something stopped me.Don’t play the hero.Lexis words echoed in my mind. She had become my guide during the past couple of days, and I knew it was in my best interest to listen to her. Better not to leave any evidence of an intruder, better to get the lay of the land before doing anything rash. I released the chain, and it fell back against the door with a loud clanking sound. A horse whinnied. I walked to the other side of the stable, where a dusty window was open a crack. â€Å"Brother?† I whispered hoarsely through the window. The cloying scent of vervain was everywhere, making me woozy and nauseated. In the corner, a filthy figure struggled to sit up. Damon. His hands and feet were bound with chains, and his skin was covered in angry red welts. The chains must have been soaked in vervain. I winced in sympathy. Damons eyes locked on mine. â€Å"You found me,† he said, no emotion in his face. â€Å"Are you happy to see that Im close to death, brother?† â€Å"Im here to save you,† I said simply. The horses were kicking up the sawdust around their feet in agitation; I didnt have much time before someone in the house heard the disturbance. Damon shrugged, an effort that clearly took all his energy. His eyes were bloodshot and glassy. A large cut lined his forehead, slicing into his eyebrow. He looked awful and emaciated; it was clear he hadnt eaten in days. I glanced around, hoping I could find something–a squirrel, a rabbit, a chipmunk–to kill and toss to him, but there was nothing. â€Å"So the cold-blooded killer is going to save me.† Damon attempted a wan smile. He leaned back against the wall, his chains rattling. â€Å"Yes, we have to–â€Å" Suddenly, I heard the sound of a door slamming, then a dog barking. I whirled around toward the main house. â€Å"What do you think youre doing?† a voice yelled out. And I stood, my hands raised to the sky, unsure of who–or what–had found me this time. How to cite Stefan’s Diaries: Bloodlust Chapter 13, Essay examples

Head in the Clouds Essay Example For Students

Head in the Clouds Essay You travel to distant worlds with the snap of your fingers. Worlds lush, rich, full of perfect love and unforgotten harmonyYour imagination is a beautiful thing, yet it serves as your best friend. It delivers you to dreams come true;fantasies so rich, luminous, and sparkling, yet so untrue. Your mind is an endless depth, filled with lost souls, wandering heartspassionate romance, and sparkling falsities. You get lost in your thoughts, in that perfectly preserved paradisethat you have come to call homeThere is a pot of gold at the end of every rainbowA shimmering silver lining around every cloudA genie to make all of your dreams come trueEvery ugly duckling is turned into a beautiful swan. There you are, your head in the cloudsIn a rich, colorful, passionate worldthat exists solely in your dreamsBut you have no intention of coming downOf leaving the throne of your crystal castle.