ref: b03198720a635d32908c98dc0e11bb9d87ee32f2
parent: f7bf1488d8d3f728770b6d54d7a4e126b9cdb310
author: Simon Howard <fraggle@gmail.com>
date: Wed May 24 16:27:40 EDT 2006
Add small calculator GUI demo. Subversion-branch: /trunk/chocolate-doom Subversion-revision: 523
--- a/textscreen/Makefile.am
+++ b/textscreen/Makefile.am
@@ -2,7 +2,7 @@
AM_CFLAGS = @SDL_CFLAGS@ -I../src
noinst_LIBRARIES=libtextscreen.a
-bin_PROGRAMS=guitest
+bin_PROGRAMS=guitest calculator
libtextscreen_a_SOURCES = \
txt_checkbox.c txt_checkbox.h \
@@ -23,4 +23,7 @@
guitest_LDADD = @SDL_LIBS@ libtextscreen.a
guitest_SOURCES = guitest.c
+
+calculator_LDADD = @SDL_LIBS@ libtextscreen.a
+calculator_SOURCES = calculator.c
--- /dev/null
+++ b/textscreen/calculator.c
@@ -1,0 +1,160 @@
+
+#include <stdio.h>
+#include <string.h>
+#include "txt_button.h"
+#include "txt_desktop.h"
+#include "txt_label.h"
+
+typedef enum
+{+ OP_NONE,
+ OP_PLUS,
+ OP_MINUS,
+ OP_MULT,
+ OP_DIV,
+} operator_t;
+
+int starting_input = 0;
+int input_value = 0;
+txt_label_t *input_box;
+int first_operand;
+operator_t operator = OP_NONE;
+
+void UpdateInputBox(void)
+{+ char buf[20];
+
+ sprintf(buf, " %i", input_value);
+ TXT_SetLabel(input_box, buf);
+}
+
+void InsertNumber(TXT_UNCAST_ARG(button), TXT_UNCAST_ARG(value))
+{+ TXT_CAST_ARG(int, value);
+
+ if (starting_input)
+ {+ input_value = 0;
+ starting_input = 0;
+ }
+
+ input_value *= 10;
+ input_value += *value;
+ UpdateInputBox();
+}
+
+void AddNumberButton(txt_table_t *table, int value)
+{+ txt_button_t *button;
+ char buf[10];
+ int *val_copy;
+
+ val_copy = malloc(sizeof(int));
+ *val_copy = value;
+
+ sprintf(buf, " %i ", value);
+
+ button = TXT_NewButton(buf);
+ TXT_AddWidget(table, button);
+ TXT_SignalConnect(button, "pressed", InsertNumber, val_copy);
+}
+
+void Operator(TXT_UNCAST_ARG(button), TXT_UNCAST_ARG(op))
+{+ TXT_CAST_ARG(operator_t, op);
+
+ first_operand = input_value;
+ operator = *op;
+ starting_input = 1;
+}
+
+void AddOperatorButton(txt_table_t *table, char *label, operator_t op)
+{+ txt_button_t *button;
+ char buf[10];
+ operator_t *op_copy;
+
+ op_copy = malloc(sizeof(operator_t));
+ *op_copy = op;
+
+ sprintf(buf, " %s ", label);
+ button = TXT_NewButton(buf);
+
+ TXT_AddWidget(table, button);
+ TXT_SignalConnect(button, "pressed", Operator, op_copy);
+}
+
+void Calculate(TXT_UNCAST_ARG(button), void *unused)
+{+ switch (operator)
+ {+ case OP_PLUS:
+ input_value = first_operand + input_value;
+ break;
+ case OP_MINUS:
+ input_value = first_operand - input_value;
+ break;
+ case OP_MULT:
+ input_value = first_operand * input_value;
+ break;
+ case OP_DIV:
+ input_value = first_operand / input_value;
+ break;
+ }
+
+ UpdateInputBox();
+
+ operator = OP_NONE;
+ starting_input = 1;
+}
+
+void BuildGUI()
+{+ txt_window_t *window;
+ txt_table_t *table;
+ txt_button_t *equals_button;
+
+ window = TXT_NewWindow("Calculator");+
+ TXT_AddWidget(window, TXT_NewSeparator(NULL));
+ input_box = TXT_NewLabel("asdf");+ TXT_AddWidget(window, input_box);
+ TXT_AddWidget(window, TXT_NewSeparator(NULL));
+ TXT_AddWidget(window, TXT_NewLabel(""));+
+ table = TXT_NewTable(4);
+ TXT_AddWidget(window, table);
+
+ AddNumberButton(table, 7);
+ AddNumberButton(table, 8);
+ AddNumberButton(table, 9);
+ AddOperatorButton(table, "*", OP_MULT);
+ AddNumberButton(table, 4);
+ AddNumberButton(table, 5);
+ AddNumberButton(table, 6);
+ AddOperatorButton(table, "-", OP_MINUS);
+ AddNumberButton(table, 1);
+ AddNumberButton(table, 2);
+ AddNumberButton(table, 3);
+ AddOperatorButton(table, "+", OP_PLUS);
+ AddNumberButton(table, 0);
+ TXT_AddWidget(table, TXT_NewLabel(""));+ equals_button = TXT_NewButton(" = ");+ TXT_SignalConnect(equals_button, "pressed", Calculate, NULL);
+ TXT_AddWidget(table, equals_button);
+ AddOperatorButton(table, "/", OP_DIV);
+
+ TXT_AddWidget(window, TXT_NewLabel(""));+ UpdateInputBox();
+}
+
+int main()
+{+ TXT_Init();
+ TXT_SetDesktopTitle("Calculator demo");+
+ BuildGUI();
+
+ TXT_GUIMainLoop();
+}
+