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Best way to do calculator style digit entry

[2 Replies]
- 11-Aug-2013 06:29 PM
- Forum: Programming Questions
I'm working on my first project in Processing which is a calculator. I've reached a speed bump. The way I thought I could do digit entry isn't working. Anybody got any ideas?
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NOTE:

Calculator entry is like this:

*Click 7 button*

Screen reads:7

*Click 2 button*

Screen reads:72

If It helps my code is:

Calculator.pde
2. PFont f;
3. import java.math.*;
4. //All of the below values allow me to quickly change values code wide
5. final int topRowYPos = 80;
6. final int secondRowYPos = 110;
7. final int thirdRowYPos = 140;
8. final int fourthRowYPos = 170;
9. final int fithRowYPos = 200;
10. final int sixthRowYPos = 230;
11. final int buttonWidth = 35;
12. final int buttonHeight = 25;
13. final int firstRowXPos = 45;
14. final int secondRowXPos = 85;
15. final int thirdRowXPos = 125;
16. final int fourthRowXPos = 165;
17. final int fithRowXPos = 205;
18. final int maxB = 27;
19. boolean wTillUpToRefresh; //Selectes wheather you will refresh automaticly or only on next button push
20. int digitCount = 0; //Counts digits. Required in the process of adding digits.
21. PFont sF = createFont("Georgia", 16, true); //Creates font used calculator wide
22. boolean isDecimal; //Checks wheather I've pressed the decimal buttons. Determines wheather the number needs to be to number*10^1 or number*10^-1
23. double numOneBuffer = 0; //Stores firstnumber;
24. double numTwoBuffer = 0; //Stores second number;
25. int numOn = 1; //Counts which position in the calculating process the user is in. 1 is first number, 2 is function(not needed but there) 3 is second number 4 is answer mode
26. String functionBuffer = "N"; //Stores which function the calculation is using
27. String screenBuffer = "0"; //Stores what is currently being displayed on the screen
28. double answerBuffer = 0; //Stores answer
29. double numMemory = 0; //Stores one varible in "Memory"
30. int buttonPressed = -1; //Detects what button has been pressed
31. boolean sign = true;
32. Button[] buttons = new Button [maxB]; //Button array for all buttons
33. void setup() {
34. size(250, 280);
35. //The following lines initilize the buttons
36. buttons[0] = new Button(firstRowXPos, secondRowYPos, "MC", false);
37. buttons[1] = new Button(firstRowXPos, thirdRowYPos, "%", false);
38. buttons[2] = new Button(firstRowXPos, fourthRowYPos, "+/-", false);
39. buttons[3] = new Button(firstRowXPos, fithRowYPos, "C", false);
40. buttons[4] = new Button(firstRowXPos, sixthRowYPos, "AC", false);
41. buttons[5] = new Button(secondRowXPos, secondRowYPos, "MR", false);
42. buttons[6] = new Button(secondRowXPos, thirdRowYPos, "7", false);
43. buttons[7] = new Button(secondRowXPos, fourthRowYPos, "4", false);
44. buttons[8] = new Button(secondRowXPos, fithRowYPos, "1", false);
45. buttons[9] = new Button(secondRowXPos, sixthRowYPos, "0", false);
46. buttons[10] = new Button(thirdRowXPos, secondRowYPos, "M-", false);
47. buttons[11] = new Button(thirdRowXPos, thirdRowYPos, "8", false);
48. buttons[12] = new Button(thirdRowXPos, fourthRowYPos, "5", false);
49. buttons[13] = new Button(thirdRowXPos, fithRowYPos, "2", false);
50. buttons[14] = new Button(thirdRowXPos, sixthRowYPos, "=", false);
51. buttons[15] = new Button(fourthRowXPos, topRowYPos, "√", false);
52. buttons[16] = new Button(fourthRowXPos, secondRowYPos, "M+", false);
53. buttons[17] = new Button(fourthRowXPos, thirdRowYPos, "9", false);
54. buttons[18] = new Button(fourthRowXPos, fourthRowYPos, "6", false);
55. buttons[19] = new Button(fourthRowXPos, fithRowYPos, "3", false);
56. buttons[20] = new Button(fourthRowXPos, sixthRowYPos, ".", false);
57. buttons[21] = new Button(fithRowXPos, topRowYPos, "off", false);
58. buttons[22] = new Button(fithRowXPos, secondRowYPos, "÷", false);
59. buttons[23] = new Button(fithRowXPos, thirdRowYPos, "*", false);
60. buttons[24] = new Button(fithRowXPos, fourthRowYPos, "-", false);
61. buttons[25] = new Button(fithRowXPos, fithRowYPos, "", true);
62. buttons[26] = new Button(fithRowXPos, sixthRowYPos, "", true);
63. }
64. void draw() {
65. rectMode(CENTER);
66. fill(255);
67. //Calculatorbody
68. rect(125, 140, 240, 270);
69. //"Screen"
70. rect(125, 40, 220, 30);
71. //Double button
72. rect(fithRowXPos, 215, buttonWidth, 55, 7);
73. fill(0);
74. textAlign(CENTER);
75. textFont(sF, 16);
76. //text for double button
77. text("+", fithRowXPos, 215);
78. //updates and displays screenBuffer
79. update();
80. //displays buttons
81. for (int i = 0; i < maxB; i++) {
82. buttons[i].display();
83. }
84. }
85. void mousePressed() {
86. //Checks which button has been pressed
87. wTillUpToRefresh = false;
88. for (int i = 0; i < maxB; i++) {
89. if (buttons[i].isOverButton()) {
90. buttonPressed = i;
91. break;
92. }
93. }
94. println(buttonPressed);//Debug code
95. if (buttonPressed == 0) {
96. //Clears "Memory" if MC button is pressed
97. numMemory = 0;
98. buttonPressed = -1;
99. }
100. else if (buttonPressed == 1 && numOn != 1 && numOn != 2) {
101. //Takes specified percent from numOneBuffer and sets numTwoBuffer to it
102. numTwoBuffer = numOneBuffer*(numTwoBuffer/100);
103. buttonPressed = -1;
104. }
105. else if (buttonPressed == 2) {
106. //Sets sign of the number the "calculator" is on based on current sign and number;
107. if (sign && numOn == 1) {
108. numOneBuffer = numOneBuffer + (-2*numOneBuffer);
109. sign = false;
110. }
111. else if (!sign && numOn == 1) {
112. numOneBuffer = numOneBuffer + (-2*numOneBuffer);
113. sign = true;
114. }
115. else if (sign && numOn == 3) {
116. numTwoBuffer = numTwoBuffer + (-2*numTwoBuffer);
117. sign = false;
118. }
119. else if (!sign && numOn == 3) {
120. numTwoBuffer = numTwoBuffer + (-2*numTwoBuffer);
121. sign = true;
122. }
123. buttonPressed = -1;
124. }
125. else if (buttonPressed == 3) {
126. //Clears current number and the properties of that number
127. if (numOn == 1) {
128. numOneBuffer = 0;
129. isDecimal = false;
130. sign = true;
131. digitCount = 0;
132. answerBuffer = 0;
133. }
134. else if (numOn == 3) {
135. numTwoBuffer = 0;
136. isDecimal = false;
137. sign = true;
138. digitCount = 0;
139. answerBuffer = 0;
140. }
141. else if (numOn == 4) {
142. numOn = 1;
143. answerBuffer = 0;
144. }
145. buttonPressed = -1;
146. }
147. else if (buttonPressed == 4) {
148. //resets buffers and all numbers properties
149. numOneBuffer = 0;
150. numTwoBuffer = 0;
151. isDecimal = false;
152. digitCount = 0;
153. answerBuffer = 0;
154. screenBuffer = "";
155. numOn = 1;
156. sign = true;
157. buttonPressed = -1;
158. }
159. else if (buttonPressed == 5) {
160. //displays value in memory until next button is pressed
161. screenBuffer = String.valueOf(numMemory);
162. wTillUpToRefresh = true;
163. update();
164. buttonPressed = -1;
165. }
166. else if (buttonPressed == 6) {
167. //Enters the digit 7
168. buttonPressed = -1;
169. }
170. }
171. double evaluate() {
172. //insert code
173. return 1;
174. }
175. void update() {
176. if (!wTillUpToRefresh) {
177. if (numOn == 1) {
178. //writes numOneBuffer to screen if the user is on step one
179. screenBuffer = String.valueOf(numOneBuffer);
180. }
181. else if (numOn == 3) {
182. //writes numTwoBuffer to screen if the user is on step two
183. screenBuffer = String.valueOf(numTwoBuffer);
184. }
185. }
186. text(screenBuffer, 125, 40);
187. }
button.pde:
2. class Button {
3. static final int BTN_DX = 35, BTN_DY = 25; // diameters x, y
4. static final int BTN_RX = BTN_DX >> 1; // radius x
5. static final int BTN_RY = BTN_DY >> 1; // radius
6. final int left, right, top, bottom, centerX, centerY; // button edges and Center Coords
7. final String text;
8. final boolean isDouble;
10. Button (int cx, int cy, String buttonText, boolean doubleButton) {
11. left = cx - BTN_RX;
12. right = cx + BTN_RX;
13. top = cy - BTN_RY;
14. bottom = cy + BTN_RY;
15. centerX = cx;
16. centerY = cy;
17. text = buttonText;
18. isDouble = doubleButton;
19. }
21. boolean isOverButton() {
22. return mouseX > left & mouseX < right
23. & mouseY > top & mouseY < bottom;
24. }
25. void display() {
26. if (!isDouble) {
27. PFont f = createFont("Georgia", 16, true);
28. textFont(f, 16);
29. textAlign(CENTER);
30. fill(255);
31. rect(centerX, centerY, BTN_DX, BTN_DY, 7);
32. fill(0);
33. text(text, centerX, centerY + 5);
34. }
35. }
36. }
Any other general suggestions are welcome.

Button detection not working for some reason

[4 Replies]
- 10-Aug-2013 08:37 PM
- Forum: Programming Questions
I'm making a calculator as a beginning project. Everything has been going fine until I got to programming the buttons. When I tried to implement button hover detection instead of detecting over the button it detected over the screen (number output).
My code is below:

Calculator.pde
2. import java.text.NumberFormat;
3. import java.text.DecimalFormat;
4. PFont f;
5. final int topRowYPos = 80;
6. final int secondRowYPos = 110;
7. final int thirdRowYPos = 140;
8. final int fourthRowYPos = 170;
9. final int fithRowYPos = 200;
10. final int sixthRowYPos = 230;
11. final int buttonWidth = 35;
12. final int buttonHeight = 25;
13. final int firstRowXPos = 45;
14. final int secondRowXPos = 85;
15. final int thirdRowXPos = 125;
16. final int fourthRowXPos = 165;
17. final int fithRowXPos = 205;
18. int digitCount;
19. boolean isDecimal;
20. double numOneBuffer;
21. double numTwoBuffer;
22. double screenBuffer;
23. double numMemorY;
24. Button mc = new Button(firstRowXPos, secondRowYPos);
25. Button percent = new Button(firstRowXPos, thirdRowYPos);
26. NumberFormat formatter = new DecimalFormat("0.0000000");
27. void setup() {
28. size(250, 280);
29. }
30. void draw() {
31. if (mc.overButton()) {
32. println("Over MC");
33. }
34. screenBuffer = 00.111;
35. rectMode(CENTER);
36. fill(255);
37. rect(125, 140, 240, 270);
38. rect(125, 40, 220, 30);
39. rect(firstRowXPos, secondRowYPos, buttonWidth, buttonHeight, 7);
40. rect(firstRowXPos, thirdRowYPos, buttonWidth, buttonHeight, 7);
41. rect(firstRowXPos, fourthRowYPos, buttonWidth, buttonHeight, 7);
42. rect(firstRowXPos, fithRowYPos, buttonWidth, buttonHeight, 7);
43. rect(firstRowXPos, sixthRowYPos, buttonWidth, buttonHeight, 7);
44. rect(secondRowXPos, secondRowYPos, buttonWidth, buttonHeight, 7);
45. rect(secondRowXPos, thirdRowYPos, buttonWidth, buttonHeight, 7);
46. rect(secondRowXPos, fourthRowYPos, buttonWidth, buttonHeight, 7);
47. rect(secondRowXPos, fithRowYPos, buttonWidth, buttonHeight, 7);
48. rect(secondRowXPos, sixthRowYPos, buttonWidth, buttonHeight, 7);
49. rect(thirdRowXPos, secondRowYPos, buttonWidth, buttonHeight, 7);
50. rect(thirdRowXPos, thirdRowYPos, buttonWidth, buttonHeight, 7);
51. rect(thirdRowXPos, fourthRowYPos, buttonWidth, buttonHeight, 7);
52. rect(thirdRowXPos, fithRowYPos, buttonWidth, buttonHeight, 7);
53. rect(thirdRowXPos, sixthRowYPos, buttonWidth, buttonHeight, 7);
54. rect(fourthRowXPos, topRowYPos, buttonWidth, buttonHeight, 7);
55. rect(fourthRowXPos, secondRowYPos, buttonWidth, buttonHeight, 7);
56. rect(fourthRowXPos, thirdRowYPos, buttonWidth, buttonHeight, 7);
57. rect(fourthRowXPos, fourthRowYPos, buttonWidth, buttonHeight, 7);
58. rect(fourthRowXPos, fithRowYPos, buttonWidth, buttonHeight, 7);
59. rect(fourthRowXPos, sixthRowYPos, buttonWidth, buttonHeight, 7);
60. rect(fithRowXPos, topRowYPos, buttonWidth, buttonHeight, 7);
61. rect(fithRowXPos, secondRowYPos, buttonWidth, buttonHeight, 7);
62. rect(fithRowXPos, thirdRowYPos, buttonWidth, buttonHeight, 7);
63. rect(fithRowXPos, fourthRowYPos, buttonWidth, buttonHeight, 7);
64. rect(fithRowXPos, 215, buttonWidth, 55, 7);
65. f = createFont("Georgia", 16);
66. textFont(f);
67. textAlign(CENTER, CENTER);
68. fill(0);
69. text("MC", firstRowXPos, secondRowYPos);
70. text("%", firstRowXPos, thirdRowYPos);
71. text("+/-", firstRowXPos, fourthRowYPos);
72. text("C", firstRowXPos, fithRowYPos);
73. text("AC", firstRowXPos, sixthRowYPos);
74. text("MR", secondRowXPos, secondRowYPos);
75. text("7", secondRowXPos, thirdRowYPos);
76. text("4", secondRowXPos, fourthRowYPos);
77. text("1", secondRowXPos, fithRowYPos);
78. text("0", secondRowXPos, sixthRowYPos);
79. text("M-", thirdRowXPos, secondRowYPos);
80. text("8", thirdRowXPos, thirdRowYPos);
81. text("5", thirdRowXPos, fourthRowYPos);
82. text("2", thirdRowXPos, fithRowYPos);
83. text("=", thirdRowXPos, sixthRowYPos);
84. text("√", fourthRowXPos, topRowYPos);
85. text("M+", fourthRowXPos, secondRowYPos);
86. text("9", fourthRowXPos, thirdRowYPos);
87. text("6", fourthRowXPos, fourthRowYPos);
88. text("3", fourthRowXPos, fithRowYPos);
89. text(".", fourthRowXPos, sixthRowYPos);
90. text("off", fithRowXPos, topRowYPos);
91. text("÷", fithRowXPos, secondRowYPos);
92. text("*", fithRowXPos, thirdRowYPos);
93. text("-", fithRowXPos, fourthRowYPos);
94. text("+", fithRowXPos, 215);
95. text(formatter.format(screenBuffer), 125, 40);
96. }
97. void mousePressed() {
98. String debugString = mouseX +","+ mouseY;
99. println(debugString);
100. }
Button.pde:
2. class Button {
3. final int buttonWidth = 35;
4. final int buttonHeight = 25;
5. int xPos, yPos;
6. Button (int y, int x) {
7. xPos = x;
8. yPos = y;
9. }
10. boolean overButton() {
11. if (mouseX >= xPos && mouseX <= xPos+buttonWidth &&
12. mouseY >= yPos && mouseY <= yPos+buttonHeight) {
13. return true;
14. }
15. else {
16. return false;
17. }
18. }
19. }
Thanks in advance.

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