Add input box widget, and include in guitest.

Subversion-branch: /trunk/chocolate-doom
Subversion-revision: 520

1 files changed, 254 insertions, 0 deletions

diff --git a/textscreen/txt_inputbox.c b/textscreen/txt_inputbox.c
new file mode 100644
index 00000000..79c9e90e
--- /dev/null
+++ b/textscreen/txt_inputbox.c
@@ -0,0 +1,254 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "doomkeys.h"
+
+#include "txt_inputbox.h"
+#include "txt_io.h"
+#include "txt_main.h"
+#include "txt_window.h"
+
+static void SetBufferFromValue(txt_inputbox_t *inputbox);
+
+static void TXT_InputBoxSizeCalc(TXT_UNCAST_ARG(inputbox), int *w, int *h)
+{
+    TXT_CAST_ARG(txt_inputbox_t, inputbox);
+
+    // Enough space for the box + cursor
+
+    *w = inputbox->size + 1;
+    *h = 1;
+}
+
+static void TXT_InputBoxDrawer(TXT_UNCAST_ARG(inputbox), int w, int selected)
+{
+    TXT_CAST_ARG(txt_inputbox_t, inputbox);
+    int i;
+    int chars;
+
+    // Select the background colour based on whether we are currently
+    // editing, and if not, whether the widget is selected.
+
+    if (inputbox->editing && selected)
+    {
+        TXT_BGColor(TXT_COLOR_BLACK, 0);
+    }
+    else if (selected)
+    {
+        TXT_BGColor(TXT_COLOR_GREY, 0);
+    }
+    else
+    {
+        // Not even selected
+
+        TXT_BGColor(TXT_COLOR_BLUE, 0);
+    }
+
+    TXT_FGColor(TXT_COLOR_BRIGHT_WHITE);
+
+    if (!inputbox->editing)
+    {
+        // If not editing, use the current value from inputbox->value.
+ 
+        SetBufferFromValue(inputbox);
+    }
+    
+    TXT_DrawString(inputbox->buffer);
+
+    chars = strlen(inputbox->buffer);
+
+    if (chars < w && inputbox->editing && selected)
+    {
+        TXT_BGColor(TXT_COLOR_BLACK, 1);
+        TXT_DrawString("_");
+        ++chars;
+    }
+    
+    for (i=chars; i < w; ++i)
+    {
+        TXT_DrawString(" ");
+    }
+}
+
+static void TXT_InputBoxDestructor(TXT_UNCAST_ARG(inputbox))
+{
+    TXT_CAST_ARG(txt_inputbox_t, inputbox);
+
+    free(inputbox->buffer);
+}
+
+static void Backspace(txt_inputbox_t *inputbox)
+{
+    if (strlen(inputbox->buffer) > 0)
+    {
+        inputbox->buffer[strlen(inputbox->buffer) - 1] = '\0';
+    }
+}
+
+static void AddCharacter(txt_inputbox_t *inputbox, int key)
+{
+    if (strlen(inputbox->buffer) < inputbox->size)
+    {
+        // Add character to the buffer
+
+        inputbox->buffer[strlen(inputbox->buffer) + 1] = '\0';
+        inputbox->buffer[strlen(inputbox->buffer)] = key;
+    }
+}
+
+static int TXT_InputBoxKeyPress(TXT_UNCAST_ARG(inputbox), int key)
+{
+    TXT_CAST_ARG(txt_inputbox_t, inputbox);
+
+    if (!inputbox->editing)
+    {
+        if (key == KEY_ENTER)
+        {
+            SetBufferFromValue(inputbox);
+            inputbox->editing = 1;
+            return 1;
+        }
+
+        return 0;
+    }
+
+    if (key == KEY_ENTER)
+    {
+        free(*((char **)inputbox->value));
+        *((char **) inputbox->value) = strdup(inputbox->buffer);
+
+        inputbox->editing = 0;
+    }
+
+    if (key == KEY_ESCAPE)
+    {
+        inputbox->editing = 0;
+    }
+
+    if (isprint(key))
+    {
+        // Add character to the buffer
+
+        AddCharacter(inputbox, key);
+    }
+
+    if (key == KEY_BACKSPACE)
+    {
+        Backspace(inputbox);
+    }
+    
+    return 1;
+}
+
+static int TXT_IntInputBoxKeyPress(TXT_UNCAST_ARG(inputbox), int key)
+{
+    TXT_CAST_ARG(txt_inputbox_t, inputbox);
+
+    if (!inputbox->editing)
+    {
+        if (key == KEY_ENTER)
+        {
+            SetBufferFromValue(inputbox);
+            inputbox->editing = 1;
+            return 1;
+        }
+
+        return 0;
+    }
+
+    if (key == KEY_ENTER)
+    {
+        *((int *) inputbox->value) = atoi(inputbox->buffer);
+
+        inputbox->editing = 0;
+    }
+
+    if (key == KEY_ESCAPE)
+    {
+        inputbox->editing = 0;
+    }
+
+    if (isprint(key))
+    {
+        // Add character to the buffer
+
+        AddCharacter(inputbox, key);
+    }
+
+    if (key == KEY_BACKSPACE)
+    {
+        Backspace(inputbox);
+    }
+    
+    return 1;
+}
+
+txt_widget_class_t txt_inputbox_class =
+{
+    TXT_InputBoxSizeCalc,
+    TXT_InputBoxDrawer,
+    TXT_InputBoxKeyPress,
+    TXT_InputBoxDestructor,
+};
+
+txt_widget_class_t txt_int_inputbox_class =
+{
+    TXT_InputBoxSizeCalc,
+    TXT_InputBoxDrawer,
+    TXT_IntInputBoxKeyPress,
+    TXT_InputBoxDestructor,
+};
+
+static void SetBufferFromValue(txt_inputbox_t *inputbox)
+{
+    if (inputbox->widget.widget_class == &txt_inputbox_class)
+    {
+        char **value = (char **) inputbox->value;
+
+        if (*value != NULL)
+        {
+            strncpy(inputbox->buffer, *value, inputbox->size);
+            inputbox->buffer[inputbox->size] = '\0';
+        }
+        else
+        {
+            strcpy(inputbox->buffer, "");
+        }
+    }
+    else if (inputbox->widget.widget_class == &txt_int_inputbox_class)
+    {
+        int *value = (int *) inputbox->value;
+        sprintf(inputbox->buffer, "%i", *value);
+    }
+}
+
+txt_inputbox_t *TXT_NewInputBox(char **value, int size)
+{
+    txt_inputbox_t *inputbox;
+
+    inputbox = malloc(sizeof(txt_inputbox_t));
+
+    TXT_InitWidget(inputbox, &txt_inputbox_class);
+    inputbox->value = value;
+    inputbox->size = size;
+    inputbox->buffer = malloc(size + 1);
+
+    return inputbox;
+}
+
+txt_inputbox_t *TXT_NewIntInputBox(int *value, int size)
+{
+    txt_inputbox_t *inputbox;
+
+    inputbox = malloc(sizeof(txt_inputbox_t));
+
+    TXT_InitWidget(inputbox, &txt_int_inputbox_class);
+    inputbox->value = value;
+    inputbox->size = size;
+    inputbox->buffer = malloc(15);
+    inputbox->editing = 0;
+    return inputbox;
+}
+