diff options
Diffstat (limited to 'src/gwin/gwin_textedit.c')
| -rw-r--r-- | src/gwin/gwin_textedit.c | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/src/gwin/gwin_textedit.c b/src/gwin/gwin_textedit.c new file mode 100644 index 00000000..ee147c84 --- /dev/null +++ b/src/gwin/gwin_textedit.c @@ -0,0 +1,253 @@ +/* + * 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 void gwinTexteditDefaultDraw(GWidgetObject* gw, void* param); + +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; +} + +static 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 of focused + _gwidgetDrawFocusRect(gw, 1, 1, gw->g.width-2, gw->g.height-2); + +} + +#undef gh2obj +#undef gw2obj + +#endif // GFX_USE_GWIN && GWIN_NEED_TEXTEDIT |