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Add small calculator GUI demo.

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Subversion-branch: /trunk/chocolate-doom
Subversion-revision: 523
This commit is contained in:
Simon Howard 2006-05-24 20:27:40 +00:00
parent f7bf1488d8
commit b03198720a
2 changed files with 164 additions and 1 deletions
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5
textscreen/Makefile.am
View file

@ -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 \
@ -24,3 +24,6 @@ libtextscreen_a_SOURCES = \
guitest_LDADD = @SDL_LIBS@ libtextscreen.a
guitest_SOURCES = guitest.c
calculator_LDADD = @SDL_LIBS@ libtextscreen.a
calculator_SOURCES = calculator.c

160
textscreen/calculator.c Normal file
View file

@ -0,0 +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();
}