T: add widget 'textarea'

It's like a label but with fixed dimensions and maximum characters' capacity at creation time.
2016-12-05 17:30:13 +01:00
parent 031a72de7d
commit bff8e40d00
5 changed files with 102 additions and 4 deletions
@@ -0,0 +1,83 @@
+#include "gui.h"
+#include "gui_defs.h"
+#include "x.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static void paint(gui *_gui, widget *_w)
+{
+  struct gui *g = _gui;
+  struct textarea_widget *t = _w;
+  LOGD("PAINT textarea '%s'\n", t->t);
+  x_fill_rectangle(g->x, g->xwin, BACKGROUND_COLOR,
+      t->common.x, t->common.y,
+      t->common.width, t->common.height);
+  x_draw_clipped_string(g->x, g->xwin, DEFAULT_FONT, t->color,
+      t->common.x + t->common.width - t->text_width,
+      t->common.y + t->baseline, t->t,
+      t->common.x, t->common.y,
+      t->common.width, t->common.height);
+}
+
+static void hints(gui *_gui, widget *_w, int *width, int *height)
+{
+  struct textarea_widget *t = _w;
+  LOGD("HINTS textarea '%s'\n", t->t);
+  *width = t->wanted_width;
+  *height = t->wanted_height;
+}
+
+widget *new_textarea(gui *_gui, int width, int height, int maxsize)
+{
+  struct gui *g = _gui;
+  struct textarea_widget *w;
+  int _;
+
+  glock(g);
+
+  w = new_widget(g, TEXTAREA, sizeof(struct textarea_widget));
+
+  w->t = calloc(maxsize, 1);
+  if (w->t == NULL) OOM;
+  w->tmaxsize = maxsize;
+  w->wanted_width = width;
+  w->wanted_height = height;
+  w->color = FOREGROUND_COLOR;
+  w->text_width = 0;
+
+  x_text_get_dimensions(g->x, DEFAULT_FONT, "jlM",
+      &_, &_, &w->baseline);
+
+  w->common.paint = paint;
+  w->common.hints = hints;
+
+  gunlock(g);
+
+  return w;
+}
+
+/*************************************************************************/
+/*                             public functions                          */
+/*************************************************************************/
+
+void textarea_set_text(gui *_g, widget *_this, char *text)
+{
+  struct gui *g = _g;
+  struct textarea_widget *this = _this;
+  int _;
+  int len = strlen(text);
+  if (len >= this->tmaxsize) {
+    fprintf(stderr, "ERROR: string '%s' too big for textarea\n", text);
+    return;
+  }
+
+  glock(g);
+
+  strcpy(this->t, text);
+  x_text_get_dimensions(g->x, DEFAULT_FONT, text,
+      &this->text_width, &_, &this->baseline);
+  send_event(g, DIRTY, this->common.id);
+
+  gunlock(g);
+}