a

1 files changed, 246 insertions, 0 deletions

diff --git a/src/gui/textbox.cpp b/src/gui/textbox.cpp
new file mode 100644
index 0000000..688450b
--- /dev/null
+++ b/src/gui/textbox.cpp
@@ -0,0 +1,246 @@
+#include "base.h"
+#include "../util/input.h"
+
+#include <SDL_keycode.h>
+
+const U32 TEXTBOX_TITLE_OFFSET = 15;
+
+U8 is_printable_char( U8 key ) {
+  return key >= 32 && key < 127;
+}
+
+void gui_textbox_draw_newline_str( GUI_TEXTBOX* tb, I32 x, I32 y, CLR clr, I32* endposx, I32* endposy ) {
+  char linebuf[GUI_TEXTBOX_MAX];
+  char* start = tb->value;
+  I32 tw, th;
+
+  for( char* c = start; !!*c; ++c ) {
+    if( *c == '\n' ) {
+      U32 len = (U32)( c - start );
+      memcpy( linebuf, start, len );
+      linebuf[len] = 0;
+
+      gui_draw_str( x, y, ALIGN_L, FNT_JPN12, clr, linebuf );
+      gui_draw_get_str_bounds( &tw, &th, FNT_JPN12, linebuf );
+      y += th + 1;
+
+      *endposx = x + tw;
+      *endposy = y + th;
+
+      if( *(c+1) == 0 )
+        break;
+
+      start = ++c;
+    }
+    else if( (*c+1) == 0 ) {
+      U32 len = (U32)( c - start );
+      memcpy( linebuf, start, len );
+      linebuf[len] = 0;
+
+      gui_draw_str( x, y, ALIGN_L, FNT_JPN12, clr, linebuf );
+      gui_draw_get_str_bounds( &tw, &th, FNT_JPN12, linebuf );
+      y += th + 1;
+      *endposx = x + tw;
+      *endposy = y + th;
+
+      break;
+    }
+  }
+}
+
+void gui_textbox_draw_blinker( GUI_TEXTBOX* tb, I32 x, I32 y, CLR clr ) {
+  if( !tb->active )
+    return;
+  if( gui_time() - tb->blinktime > 1.0f ) {
+    tb->blink = !tb->blink;
+    tb->blinktime = gui_time();
+  }
+
+  if( tb->blink )
+    gui_draw_str( x, y, ALIGN_L, FNT_JPN12, clr, "|" );
+}
+
+void gui_textbox_draw_fn( void* ptr ) {
+  GUI_TEXTBOX* tb = (GUI_TEXTBOX*)ptr;
+
+  I32 x = gui_relx( tb );
+  I32 y = gui_rely( tb );
+
+  gui_draw_str( x, y, ALIGN_L, FNT_JPN12, ui_clr.txt, tb->name );
+  y += TEXTBOX_TITLE_OFFSET;
+
+  CLR col = gui_is_fg_window( tb )? ui_clr.border : ui_clr.border_inactive;
+
+  gui_draw_frect( x, y, tb->w, tb->h, col );
+  gui_draw_frect( x+1, y+1, tb->w-2, tb->h-2, ui_clr.bg_sec );
+
+  CLR clr = tb->active? ui_clr.txt : ui_clr.txt_inactive;
+  I32 ypos = y + 3;
+  I32 xpos = x + 2;
+
+  I32 endposx, endposy;
+
+  if( tb->allow_newl ) {
+    gui_textbox_draw_newline_str( tb, xpos, ypos, clr, &endposx, &endposy );
+  } else {
+    gui_draw_str( xpos, ypos, ALIGN_L, FNT_JPN12, clr, tb->value );
+
+    I32 tw, th;
+    gui_draw_get_str_bounds( &tw, &th, FNT_JPN12, tb->value );
+    endposx = xpos + tw;
+    endposy = ypos;
+  }
+
+  gui_textbox_draw_blinker( tb, endposx, endposy, clr );
+}
+
+void gui_textbox_handle_mouse( GUI_TEXTBOX* tb ) {
+  I32 x = gui_relx( tb );
+  I32 y = gui_rely( tb ) + TEXTBOX_TITLE_OFFSET;
+  I32 w = tb->w;
+  I32 h = tb->h;
+
+  U8 m1 = gui_mbutton_down( 0 );
+  I32 mx, my;
+  gui_cursor_pos( &mx, &my );
+
+  U8 inbounds = mx >= x && mx <= x + w && my >= y && my <= y + h;
+
+  if( m1 ) {
+    if( inbounds )
+      tb->m1held = 1;
+    else
+     tb->active = 0;
+  } else {
+    if( inbounds && tb->m1held ) {
+      tb->active = 1;
+      tb->blink = 1;
+      tb->blinktime = gui_time();
+    }
+    tb->m1held = 0;
+  }
+}
+
+void gui_textbox_loop_keys( GUI_TEXTBOX* tb ) {
+  U32 len = strlen( tb->value );
+
+  for( U32 i = 0; i < 0xff; ++i ) {
+    U8 key  = tb->keys[i];
+    U8 prev = tb->prevkeys[i];
+
+    if( !key && prev && i == tb->heldkey )
+      tb->heldkey = 0;
+    else if( key && !prev ) {
+      if( is_printable_char( i ) && len < tb->maxlen - 1 ) {
+        if( tb->keys[SDLK_LSHIFT & 0xff] || tb->keys[SDLK_RSHIFT & 0xff] )
+          tb->value[len] = (char)i + ('a' - 'A');
+        else
+          tb->value[len] = (char)i;
+        tb->value[++len] = 0;
+      }
+      else if( i == '\b' ) {
+        if( len > 0 ) {
+          tb->value[--len] = 0;
+        }
+      }
+      else if( i == '\r' ) {
+        if( tb->allow_newl ) {
+          tb->value[len] = '\n';
+          tb->value[++len] = 0;
+        }
+        else {
+          tb->active = 0;
+        }
+      } else {
+        if( i == '\x1b' )
+          tb->active = 0;
+        if( tb->cb )
+          tb->cb( tb );
+        continue;
+      }
+
+      tb->heldkey = i;
+      tb->heldtime = gui_time();
+      if( tb->cb )
+        tb->cb( tb );
+    }
+  }
+}
+
+void gui_textbox_handle_repeat( GUI_TEXTBOX* tb ) {
+  if( !tb->heldkey )
+    return;
+
+  F32 delta = gui_time() - tb->heldtime;
+  if( delta <= 0.75f )
+    return;
+
+  if( gui_time() - tb->repeattime > 0.05f ) {
+    U32 len = strlen( tb->value );
+    if( is_printable_char( tb->heldkey ) && len < (tb->maxlen - 1) ) {
+      if( tb->keys[SDLK_LSHIFT & 0xff] || tb->keys[SDLK_RSHIFT & 0xff] )
+        tb->value[len] = tb->heldkey + ('a' - 'A');
+      else
+        tb->value[len] = tb->heldkey;
+      tb->value[++len] = 0;
+      if( tb->cb )
+        tb->cb( tb );
+    }
+    else if( tb->heldkey == '\b' && len > 0 ) {
+      tb->value[--len] = 0;
+      if( tb->cb )
+        tb->cb( tb );
+    }
+
+    tb->repeattime = gui_time();
+  }
+}
+
+void gui_textbox_handle_keyboard( GUI_TEXTBOX* tb ) {
+  if( !tb->active )
+    return;
+
+  memcpy( tb->prevkeys, tb->keys, 0xff );
+  memcpy( tb->keys, input.keys, 0xff );
+
+  gui_textbox_loop_keys( tb );
+  gui_textbox_handle_repeat( tb );
+}
+
+void gui_textbox_input_fn( void* ptr ) {
+  GUI_TEXTBOX* tb = (GUI_TEXTBOX*)ptr;
+
+  gui_textbox_handle_mouse( tb );
+  gui_textbox_handle_keyboard( tb );
+}
+
+GUI_TEXTBOX* gui_textbox( I32 x, I32 y, I32 w, I32 h, const char* title, U32 maxlen, U8 allow_newl ) {
+  GUI_TEXTBOX* tb = new GUI_TEXTBOX;
+
+  tb->x = x;
+  tb->y = y;
+  tb->w = w;
+  tb->h = h;
+  tb->xbound = tb->w;
+  tb->ybound = tb->h + TEXTBOX_TITLE_OFFSET;
+  tb->parent = _gui.cur_view;
+  tb->draw_fn = gui_textbox_draw_fn;
+  tb->input_fn = gui_textbox_input_fn;
+  strcpy( tb->name, title );
+
+  tb->cb = 0;
+  tb->active = 0;
+  tb->m1held = 0;
+  tb->heldkey = 0;
+  tb->heldtime = 0;
+  tb->repeattime = 0;
+  tb->maxlen = maxlen;
+  tb->allow_newl = allow_newl;
+  memset( tb->value, 0, GUI_TEXTBOX_MAX );
+  memset( tb->keys, 0, 0xff );
+  memset( tb->prevkeys, 0, 0xff );
+
+  gui_get_view()->children.push( tb );
+
+  return tb;
+}