src/widget/textbox.c

   1 /*! \file textbox.c
   2
   3     Implements textbox widgets. Some textbox-specific code is sprinkled
   4     elsewhere at the moment too, such as in label.c and in functions in gui.c
   5     like activate_widget() and revert_widget().
   6 */
   7
   8 #include "SDL_gfxPrimitives.h"  /* for vlineRGBA() */
   9
  10 #include "../graphics.h"
  11 #include "../memory.h"
  12 #include "font.h"
  13 #include "widgets.h"
  14 #include "textbox.h"
  15 #include "box.h"
  16 #include "label.h"
  17
  18 static void free_textbox(struct xuni_t *xuni, struct widget_t *widget);
  19 static void reposition_textbox(struct xuni_t *xuni, struct widget_t *widget);
  20 static void rescale_textbox(struct xuni_t *xuni, struct widget_t *widget);
  21 static void paint_textbox(struct xuni_t *xuni, struct widget_t *widget);
  22
  23 void textbox_widget_event(struct xuni_t *xuni, struct widget_t *widget,
  24     enum widget_event_t event) {
  25
  26     static void (*function[])(struct xuni_t *xuni, struct widget_t *widget)
  27         = {
  28
  29         free_textbox,
  30         0,
  31         paint_textbox,
  32         reposition_textbox,
  33         rescale_textbox
  34     };
  35
  36     call_widget_event_func(xuni, widget, event, function,
  37         sizeof(function) / sizeof(*function));
  38 }
  39
  40 void init_textbox(struct widget_t *widget, struct xuni_t *xuni,
  41     const char *text, size_t font) {
  42
  43     widget->type = WIDGET_TEXTBOX;
  44     widget->p.textbox = xuni_memory_allocate(sizeof(*widget->p.textbox));
  45
  46     widget->p.textbox->leftpos = 0;
  47
  48     add_allocate_widget_compose(widget, "alwaysinbox");
  49
  50     init_widget_pos(last_compose_widget(widget), 0, 0, 100.0, 100.0,
  51         POS_PACK_NONE);
  52     init_box(last_compose_widget(widget), BOX_STYLE_ALWAYSIN, 0);
  53     /*last_compose_widget(widget)->visibility &= ~WIDGET_VISIBILITY_SELABLE;*/
  54     last_compose_widget(widget)->visibility &= ~WIDGET_VISIBILITY_INDEPENDENT;
  55
  56     add_allocate_widget_compose(widget, "text");
  57
  58     init_widget_pos(last_compose_widget(widget), 0, 0, 100.0, 100.0,
  59         POS_PACK_NONE);
  60     init_label(last_compose_widget(widget), font, text, LABEL_ALIGN_LEFT,
  61         255, 255, 255);
  62     /* !!! why does reposition_widget() not work? */
  63     /* !!! why was this here? */
  64     /*widget_event(xuni, widget, WIDGET_EVENT_RESCALE);*/
  65     last_compose_widget(widget)->visibility &= ~WIDGET_VISIBILITY_INDEPENDENT;
  66
  67     widget->visibility &= ~WIDGET_VISIBILITY_NOT_COMPOSE;
  68 }
  69
  70 static void free_textbox(struct xuni_t *xuni, struct widget_t *widget) {
  71     xuni_memory_free(widget->p.textbox);
  72 }
  73
  74 static void paint_textbox(struct xuni_t *xuni, struct widget_t *widget) {
  75     set_box_type(xuni->gui, widget,
  76         widget->compose->widget[WID_TEXTBOX_BOX]);
  77     paint_box_previous_state(xuni,
  78         widget->compose->widget[WID_TEXTBOX_BOX]);
  79
  80     /*widget_event(xuni, widget->compose->widget[WID_TEXTBOX_BOX],
  81         WIDGET_EVENT_PAINT);*/
  82
  83     widget_event(xuni, widget->compose->widget[WID_TEXTBOX_LABEL],
  84         WIDGET_EVENT_PAINT);
  85
  86     /*paint_textbox_text(xuni->smode->screen, xuni->font, xuni->gui,
  87         widget->p.textbox->data.scroll.text,
  88         &widget->pos->real,
  89         xuni->gui->active.widget == widget->compose->widget[0]);*/
  90 }
  91
  92 static void reposition_textbox(struct xuni_t *xuni, struct widget_t *widget) {
  93
  94 }
  95
  96 static void rescale_textbox(struct xuni_t *xuni, struct widget_t *widget) {
  97     /*struct widget_t *label = widget->compose->widget[WID_TEXTBOX_LABEL];
  98
  99     if(label->p.label && label->p.label->label) {
 100         if(label->p.label->label->w > widget->pos->real.w) {
 101             int offset = label->p.label->label->w - widget->pos->real.w;
 102
 103             set_widget_clip(label, 0, 0, offset, 0,
 104                 label->p.label->label->w - offset, label->p.label->label->h);
 105         }
 106     }*/
 107 }
 108
 109 int textbox_is_empty(struct widget_t *widget) {
 110     const char *data = get_textbox_data(widget);
 111
 112     return !data || !*data;
 113 }
 114
 115 const char *get_textbox_data(struct widget_t *widget) {
 116     return widget->compose->widget[WID_TEXTBOX_LABEL]->p.label->text;
 117 }
 118
 119 /*! Clears the data in the textbox \a widget. Does not affect the textbox is
 120     the textbox is already empty.
 121
 122     \param xuni A pointer to the main xuni structure.
 123     \param widget The textbox widget to clear the data of.
 124 */
 125 void clear_textbox_data(struct xuni_t *xuni, struct widget_t *widget) {
 126     struct widget_t *label = widget->compose->widget[WID_TEXTBOX_LABEL];
 127
 128     if(label->p.label->text && *label->p.label->text) {
 129         xuni_memory_free((void *)label->p.label->text);
 130         label->p.label->text = 0;
 131
 132         widget_event(xuni, widget, WIDGET_EVENT_RESCALE);
 133     }
 134 }
 135
 136 /*! Sets the data of the textbox \a widget. Automatically rescales the textbox
 137     after setting the data.
 138
 139     \param xuni A pointer to the main xuni structure.
 140     \param widget The textbox to set the data of.
 141     \param text The text to set the textbox data to.
 142 */
 143 void set_textbox_data(struct xuni_t *xuni, struct widget_t *widget,
 144     const char *text) {
 145
 146     struct widget_t *label = widget->compose->widget[WID_TEXTBOX_LABEL];
 147
 148     xuni_memory_free((void *)label->p.label->text);
 149     label->p.label->text = text;
 150
 151     widget_event(xuni, widget, WIDGET_EVENT_RESCALE);
 152 }