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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
/**
* @file src/gwin/gwin_textedit.c
* @brief GWIN TextEdit widget header file
*/
#include "gfx.h"
#if GFX_USE_GWIN && GWIN_NEED_TEXTEDIT
#include "gwin_class.h"
#include <string.h>
// Some settings
#define TEXT_PADDING_LEFT 4
#define CURSOR_PADDING_LEFT 0
#define CURSOR_EXTRA_HEIGHT 1
// Macros to assist in data type conversions
#define gh2obj ((GTexteditObject *)gh)
#define gw2obj ((GTexteditObject *)gw)
static bool_t resizeText(GWidgetObject* gw, size_t pos, int32_t diff) {
char *p, *q;
size_t sz;
p = (char *)gw->text;
sz = strlen(p)+1;
if (diff < 0)
memcpy(p+pos, p+pos-diff, sz-pos+diff);
if (!(p = gfxRealloc(p, sz, sz+diff)))
return FALSE;
gw->text = p;
if (diff > 0) {
q = p + sz;
p += pos;
while(--q >= p)
q[diff] = q[0];
}
return TRUE;
}
#if (GFX_USE_GINPUT && GINPUT_NEED_KEYBOARD) || GWIN_NEED_KEYBOARD
static void TextEditKeyboard(GWidgetObject* gw, GEventKeyboard* pke) {
// Only react on KEYDOWN events. Ignore KEYUP events.
if ((pke->keystate & GKEYSTATE_KEYUP) || !pke->bytecount)
return;
// Is it a special key?
if (pke->keystate & GKEYSTATE_SPECIAL) {
// Arrow keys to move the cursor
switch ((uint8_t)pke->c[0]) {
case GKEY_LEFT:
if (!gw2obj->cursorPos)
return;
gw2obj->cursorPos--;
break;
case GKEY_RIGHT:
if (!gw->text[gw2obj->cursorPos])
return;
gw2obj->cursorPos++;
break;
case GKEY_HOME:
if (!gw2obj->cursorPos)
return;
gw2obj->cursorPos = 0;
break;
case GKEY_END:
if (!gw->text[gw2obj->cursorPos])
return;
gw2obj->cursorPos = strlen(gw->text);
break;
default:
return;
}
} else {
// Normal key press
switch((uint8_t)pke->c[0]) {
case GKEY_BACKSPACE:
// Backspace
if (!gw2obj->cursorPos)
return;
gw2obj->cursorPos--;
resizeText(gw, gw2obj->cursorPos, -1);
break;
case GKEY_TAB:
case GKEY_LF:
case GKEY_CR:
// Move to the next field
_gwinMoveFocus();
return;
case GKEY_DEL:
// Delete
if (!gw->text[gw2obj->cursorPos])
return;
resizeText(gw, gw2obj->cursorPos, -1);
break;
default:
// Ignore any other control characters
if ((uint8_t)pke->c[0] < GKEY_SPACE)
return;
// Keep the edit length to less than the maximum
if (gw2obj->maxSize && gw2obj->cursorPos+pke->bytecount > gw2obj->maxSize)
return;
// Make space
resizeText(gw, gw2obj->cursorPos, pke->bytecount);
// Insert the character
memcpy((char *)gw->text+gw2obj->cursorPos, pke->c, pke->bytecount);
gw2obj->cursorPos += pke->bytecount;
break;
}
}
_gwinUpdate((GHandle)gw);
}
#endif
static const gwidgetVMT texteditVMT = {
{
"TextEdit", // The class name
sizeof(GTexteditObject), // The object size
_gwidgetDestroy, // The destroy routine
_gwidgetRedraw, // The redraw routine
0, // The after-clear routine
},
gwinTexteditDefaultDraw, // default drawing routine
#if GINPUT_NEED_MOUSE
{
0, // Process mouse down events (NOT USED)
0, // Process mouse up events (NOT USED)
0, // Process mouse move events (NOT USED)
},
#endif
#if (GFX_USE_GINPUT && GINPUT_NEED_KEYBOARD) || GWIN_NEED_KEYBOARD
{
TextEditKeyboard // Process keyboard key down events
},
#endif
#if GINPUT_NEED_TOGGLE
{
0, // No toggle role
0, // Assign Toggles (NOT USED)
0, // Get Toggles (NOT USED)
0, // Process toggle off event (NOT USED)
0, // Process toggle on event (NOT USED)
},
#endif
#if GINPUT_NEED_DIAL
{
0, // No dial roles
0, // Assign Dials (NOT USED)
0, // Get Dials (NOT USED)
0, // Procees dial move events (NOT USED)
},
#endif
};
GHandle gwinGTexteditCreate(GDisplay* g, GTexteditObject* wt, GWidgetInit* pInit, size_t maxSize)
{
char *p;
// Create the underlying widget
if (!(wt = (GTexteditObject*)_gwidgetCreate(g, &wt->w, pInit, &texteditVMT)))
return 0;
wt->maxSize = maxSize;
// Reallocate the text (if necessary)
if (!(wt->w.g.flags & GWIN_FLG_ALLOCTXT)) {
if (!(p = gfxAlloc(wt->maxSize+1)))
return 0;
strncpy(p, wt->w.text, wt->maxSize);
wt->w.text = p;
wt->w.g.flags |= GWIN_FLG_ALLOCTXT;
}
// Set text and cursor position
wt->cursorPos = strlen(wt->w.text);
gwinSetVisible(&wt->w.g, pInit->g.show);
return (GHandle)wt;
}
void gwinTexteditDefaultDraw(GWidgetObject* gw, void* param)
{
const char *p;
coord_t cpos, tpos;
color_t ccol, tcol;
(void)param;
// Is it a valid handle?
if (gw->g.vmt != (gwinVMT*)&texteditVMT)
return;
// Retrieve colors
tcol = (gw->g.flags & GWIN_FLG_SYSENABLED) ? gw->pstyle->enabled.text : gw->pstyle->disabled.text;
ccol = (gw->g.flags & GWIN_FLG_SYSENABLED) ? gw->pstyle->enabled.edge : gw->pstyle->disabled.edge;
// Adjust the text position so the cursor fits in the window
p = gw->text;
if (!gw2obj->cursorPos)
tpos = 0;
else {
for(cpos = gw2obj->cursorPos; ; p++, cpos--) {
tpos = gdispGetStringWidthCount(p, gw->g.font, cpos);
if (tpos < gw->g.width-(TEXT_PADDING_LEFT+CURSOR_PADDING_LEFT))
break;
}
}
// Render background and string
#if TEXT_PADDING_LEFT
gdispGFillArea(gw->g.display, gw->g.x, gw->g.y, TEXT_PADDING_LEFT, gw->g.height, gw->pstyle->background);
#endif
gdispGFillStringBox(gw->g.display, gw->g.x + TEXT_PADDING_LEFT, gw->g.y, gw->g.width-TEXT_PADDING_LEFT, gw->g.height, p, gw->g.font, tcol, gw->pstyle->background, justifyLeft);
// Render cursor (if focused)
if (gwinGetFocus() == (GHandle)gw) {
// Calculate cursor stuff
// Draw cursor
tpos += gw->g.x + CURSOR_PADDING_LEFT + TEXT_PADDING_LEFT + gdispGetFontMetric(gw->g.font, fontBaselineX)/2;
cpos = (gw->g.height - gdispGetFontMetric(gw->g.font, fontHeight))/2 - CURSOR_EXTRA_HEIGHT;
gdispGDrawLine(gw->g.display, tpos, gw->g.y + cpos, tpos, gw->g.y + gw->g.height - cpos, ccol);
}
// Render border
gdispGDrawBox(gw->g.display, gw->g.x, gw->g.y, gw->g.width, gw->g.height, ccol);
// Render highlighted border if focused
_gwidgetDrawFocusRect(gw, 1, 1, gw->g.width-2, gw->g.height-2);
}
#undef gh2obj
#undef gw2obj
#endif // GFX_USE_GWIN && GWIN_NEED_TEXTEDIT
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