EzWindows

1. EzWindows

2. Chapter 3: EzWindows • Page 130 to 141

3. EzWindows Library Objects • Definitions are the same form as other objects • Example SimpleWindow W; • Most non-fundamental classes have been created so that an object is automatically initialized to a sensible value • SimpleWindow objects have member functions to process messages to manipulate the objects • Most important member function is Open() which causes the object to be displayed on the screen • Example W.Open();

4. Initialization • Class objects may have several attributes to initialize • Syntax for initializing an object with multiple attributes Type Identifier(Exp1, Exp2, ..., Expn); • SimpleWindow object has several optional attributes SimpleWindow W("Window Fun", 8, 4); • First attribute • Window banner • Second attribute • Width of window in centimeters • Third attribute • Height of window in centimeters

5. An EzWindows Program #include <iostream> using namespace std; #include "ezwin.h" int ApiMain() { SimpleWindow W("A Window", 12, 12); W.Open(); cout << "Enter a character to exit" << endl; char a; cin >> a; return 0; }

6. This should be a comment in all your EZWindows Programs //To compile this program you must: //1. If the .h files are not in same subdirectory as your program then //goto Project, Settings..., C/C++ tab, choose Preprocessor from the Category //pulldown menu, and under Additional Include Directories //add C:\Program Files\C++ProgramDesign\ezwin\include //2. goto Project, Add to Project, File. From the Look In: pulldown menu //goto subdirectory C:\Program Files\C++ProgramDesign\ezwin\lib. //From pull down menu for Files of Type:, choose All Files. File Ezwinvc50.lib //should appear in the listing box. Choose that file (Ezwinvc50.lib) and //select OK button. //3. The environment should be ready for use.

7. An EzWindows Project File

8. An EzWindows Project File

9. Sample Display Behavior

10. RectangleShape Objects • EzWindows also provides RectangleShape for manipulating rectangles • RectangleShape objects can specify the following attributes • SimpleWindow object that contains the rectangle (mandatory) • Offset from left edge of the SimpleWindow • Offset from top edge of the SimpleWindow • Offsets are measured in centimeters from rectangle center • Width in centimeters • Height in centimeters • Color • color is an EzWindows type

11. RectangleShape Objects • Examples SimpleWindow W1("My Window", 20, 20); SimpleWindow W2("My Other Window", 15, 10); RectangleShape R(W1, 4, 2, Blue, 3, 2); RectangleShape S(W2, 5, 2, Red, 1, 1); RectangleShape T(W1, 3, 1, Black, 4, 5); RectangleShape U(W1, 4, 9);

12. #include <iostream> using namespace std; #include "rect.h" int ApiMain() { Position pos0(1, 1); SimpleWindow W1("First Window", 10, 10, pos0); Position pos1(12, 8); SimpleWindow W2("Second Window", 15, 10, pos1); W1.Open(); W2.Open(); RectangleShape R(W1, 4, 6, Blue, 3, 2); RectangleShape S(W2, 5, 2, Red, 1, 1); RectangleShape T(W1, 4, 2, Black, 4, 2); RectangleShape U(W1, 4, 9); R.Draw(); S.Draw(); T.Draw(); U.Draw(); cout << "Enter a character to exit" << endl; char Response; cin >> Response; return 0; } Example – ez6.cpp

13. RectangleShape Objects • Some RectangleShape member functions for processing messages • Draw() • Causes rectangle to be displayed in its associated window • GetWidth() • Returns width of object in centimeters • GetHeight() • Returns height of object in centimeters • SetSize() • Takes two attributes -- a width and height -- that are used to reset dimensions of the rectangle

14. Another EzWindows Program #include <iostream> using namespace std; #include "rect.h" int ApiMain() { SimpleWindow W("Rectangular Fun", 12, 12); W.Open(); RectangleShape R(W, 5.0, 2.5, Blue, 1, 2); R.Draw(); cout << "Enter a character to exit" << endl; char Response; cin >> Response; return 0; }

15. Sample Display Behavior

16. Chapter 4: EzWindows • Page 210 to 214

17. Displaying a Diagonal SimpleWindow W("One diagonal", 5.5, 2.25); W.Open(); for (int j = 1; j <= 3; ++j) { float x = j * 0.75 + 0.25; float y = j * 0.75 - 0.25; float Side = 0.4; RectangleShape S(W, x, y, Blue, Side, Side); S.Draw(); }

18. Sample Display

19. Displaying Three Diagonals The scope of i includes the inner loop. SimpleWindow W("Three diagonals", 6.5, 2.25); W.Open(); for (int i = 1; i <= 3; ++i) { for (int j = 1; j <= 3; ++j) { float x = i - 1 + j * 0.75 + 0.25; float y = j * 0.75 - 0.25; float Side = 0.4; RectangleShape S(W, x, y, Blue, Side, Side); S.Draw(); } } The scope of j is just the inner loop.

20. Sample Display

21. Chapter 6: EzWindows • Page 319 to 321 • Page 333 to 341

22. Passing Constant Rectangles void DrawBoxes(const RectangleShape &R1, const RectangleShape &R2) { R1.Draw(); R2.Draw(); } int ApiMain() { SimpleWindow Demo("Demo Program"); Demo.Open(); RectangleShape Rect1(Demo, 3, 2, Blue); RectangleShape Rect2(Demo, 6, 5, Yellow); DrawBoxes(Rect1, Rect2); return 0; }