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Working TextEdit with on-screen keyboard (and real keyboard)

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This commit is contained in:
inmarket 2015-10-13 00:58:31 +10:00
parent 5c615c3430
commit 5e8e0b7744
4 changed files with 140 additions and 125 deletions
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2
src/gwin/gwin_class.h
View File

@ -325,6 +325,8 @@ bool_t _gwinWMAdd(GHandle gh, const GWindowInit *pInit);
/**
* @brief Move the focus off the current focus window.
*
* @note The focus can stay on the same window if there is no other focusable window
*
* @notapi
*/
void _gwinMoveFocus(void);

239
src/gwin/gwin_textedit.c
View File

@ -18,112 +18,111 @@
#include <string.h>
// Some settings
const int TEXT_PADDING_LEFT = 4;
const int FOCUS_BORDER_THICKNESS = 3;
const int CURSOR_PADDING_LEFT = 0;
const int CURSOR_EXTRA_HEIGHT = 1;
#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)
// cursorPos is the position of the next character
// textBuffer[cursorPos++] = readKey();
static bool_t resizeText(GWidgetObject* gw, size_t pos, int32_t diff) {
char *p, *q;
size_t sz;
static void _shiftTextLeft(char* buffer, size_t maxSize, size_t index)
{
// Find the end of the string
size_t indexTerminator = index;
while (buffer[indexTerminator] != '\0' && indexTerminator < maxSize-1) {
indexTerminator++;
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];
}
// Shift
memcpy(&buffer[index-1], &buffer[index], indexTerminator-index);
// Terminate the string
buffer[indexTerminator-1] = '\0';
return TRUE;
}
static void _shiftTextRight(char* buffer, size_t maxSize, size_t index, char fillChar)
{
// Find the end of the string
size_t indexTerminator = index;
while (buffer[indexTerminator] != '\0' && indexTerminator < maxSize-1) {
indexTerminator++;
}
// Shift
memcpy(&buffer[index+1], &buffer[index], indexTerminator-index);
// Fill the gap
buffer[index] = fillChar;
}
#if GINPUT_NEED_KEYBOARD || GWIN_NEED_KEYBOARD
static void TextEditKeyboard(GWidgetObject* gw, GEventKeyboard* pke)
{
#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) {
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 > 0) {
gw2obj->cursorPos--;
}
if (!gw2obj->cursorPos)
return;
gw2obj->cursorPos--;
break;
case GKEY_RIGHT:
if (gw2obj->cursorPos < strlen(gw2obj->textBuffer)) {
gw2obj->cursorPos++;
}
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;
}
}
// Parse the key press
else if (pke->bytecount >= 1) {
// Is it backspace?
if (pke->c[0] == GKEY_BACKSPACE) {
if (gw2obj->cursorPos == 0) {
return;
}
_shiftTextLeft(gw2obj->textBuffer, gw2obj->maxSize, gw2obj->cursorPos--);
}
// Is it delete?
else if (pke->c[0] == GKEY_DEL) {
// Check whether there is a character on the right side of the cursor
if (gw2obj->textBuffer[gw2obj->cursorPos] == '\0') {
return;
}
_shiftTextLeft(gw2obj->textBuffer, gw2obj->maxSize, gw2obj->cursorPos+1);
}
// Add a new character
else {
// Prevent buffer overflow
if (gw2obj->cursorPos >= gw2obj->maxSize)
return;
// Shift everything right from the cursor by one character. This includes the '\0'. Then inser the new character.
_shiftTextRight(gw2obj->textBuffer, gw2obj->maxSize, gw2obj->cursorPos++, pke->c[0]);
}
// Set the new text
gwinSetText((GHandle)gw, gw2obj->textBuffer, FALSE);
}
_gwinUpdate((GHandle)gw);
}
#endif
@ -141,12 +140,12 @@ static const gwidgetVMT texteditVMT = {
gwinTexteditDefaultDraw, // default drawing routine
#if GINPUT_NEED_MOUSE
{
0, // Process mose down events (NOT USED)
0, // Process mouse down events (NOT USED)
0, // Process mouse up events (NOT USED)
0, // Process mouse move events (NOT USED)
},
#endif
#if GINPUT_NEED_KEYBOARD || GWIN_NEED_KEYBOARD
#if (GFX_USE_GINPUT && GINPUT_NEED_KEYBOARD) || GWIN_NEED_KEYBOARD
{
TextEditKeyboard // Process keyboard key down events
},
@ -172,25 +171,25 @@ static const gwidgetVMT texteditVMT = {
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;
// Allocate the text buffer
wt->maxSize = maxSize;
wt->textBuffer = gfxAlloc(wt->maxSize);
if (wt->textBuffer == 0)
return 0;
// Initialize the text buffer
size_t i = 0;
for (i = 0; i < wt->maxSize; i++) {
wt->textBuffer[i] = '\0';
// 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
strncpy(wt->textBuffer, gwinGetText((GHandle)wt), wt->maxSize); // FixMe: pInit->text leads to a segfault
wt->cursorPos = strlen(wt->textBuffer);
wt->cursorPos = strlen(wt->w.text);
gwinSetVisible(&wt->w.g, pInit->g.show);
@ -199,43 +198,53 @@ GHandle gwinGTexteditCreate(GDisplay* g, GTexteditObject* wt, GWidgetInit* pInit
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) {
if (gw->g.vmt != (gwinVMT*)&texteditVMT)
return;
}
// Retrieve colors
color_t textColor = (gw->g.flags & GWIN_FLG_SYSENABLED) ? gw->pstyle->enabled.text : gw->pstyle->disabled.text;
color_t cursorColor = (gw->g.flags & GWIN_FLG_SYSENABLED) ? gw->pstyle->enabled.edge : gw->pstyle->disabled.edge;
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
gdispGFillArea(gw->g.display, gw->g.x, gw->g.y, gw->g.width, gw->g.height, gw->pstyle->background);
gdispGFillStringBox(gw->g.display, gw->g.x + TEXT_PADDING_LEFT, gw->g.y, gw->g.width, gw->g.height, gw->text, gw->g.font, textColor, gw->pstyle->background, justifyLeft);
// Render border (always)
gdispGDrawBox(gw->g.display, gw->g.x, gw->g.y, gw->g.width, gw->g.height, (gw->g.flags & GWIN_FLG_SYSENABLED) ? gw->pstyle->enabled.edge : gw->pstyle->disabled.edge);
// Render highlighted border of focused
_gwidgetDrawFocusRect(gw, 1, 1, gw->g.width-2, gw->g.height-2);
#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
coord_t textWidth = gdispGetStringWidthCount(gw2obj->textBuffer, gw->g.font, gw2obj->cursorPos);
coord_t cursorHeight = gdispGetFontMetric(gw->g.font, fontHeight);
coord_t cursorSpacingTop = (gw->g.height - cursorHeight)/2 - CURSOR_EXTRA_HEIGHT;
coord_t cursorSpacingBottom = (gw->g.height - cursorHeight)/2 - CURSOR_EXTRA_HEIGHT;
// Draw cursor
coord_t lineX0 = gw->g.x + textWidth + CURSOR_PADDING_LEFT + TEXT_PADDING_LEFT + gdispGetFontMetric(gw->g.font, fontBaselineX)/2;
coord_t lineX1 = lineX0;
coord_t lineY0 = gw->g.y + cursorSpacingTop;
coord_t lineY1 = gw->g.y + gw->g.height - cursorSpacingBottom;
gdispGDrawLine(gw->g.display, lineX0, lineY0, lineX1, lineY1, cursorColor);
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

22
src/gwin/gwin_widget.c
View File

@ -145,11 +145,10 @@ static void gwidgetEvent(void *param, GEvent *pe) {
if ((pme->buttons & GMETA_MOUSE_DOWN)) {
gh->flags |= GWIN_FLG_MOUSECAPTURE;
#if GFX_USE_GINPUT && GINPUT_NEED_KEYBOARD
#if (GFX_USE_GINPUT && GINPUT_NEED_KEYBOARD) || GWIN_NEED_KEYBOARD
// We should try and capture the focus on this window.
// If we can't no window should have the focus
if (!gwinSetFocus(gh))
gwinSetFocus(0);
// If we can't then we don't change the focus
gwinSetFocus(gh);
#endif
if (wvmt->MouseDown)
@ -159,7 +158,7 @@ static void gwidgetEvent(void *param, GEvent *pe) {
break;
#endif
#if GFX_USE_GINPUT && GINPUT_NEED_KEYBOARD
#if (GFX_USE_GINPUT && GINPUT_NEED_KEYBOARD) || GWIN_NEED_KEYBOARD
case GEVENT_KEYBOARD:
// If Tab key pressed then set focus to next widget
if (pke->bytecount == 1 && pke->c[0] == GKEY_TAB) {
@ -227,7 +226,7 @@ static void gwidgetEvent(void *param, GEvent *pe) {
#undef pde
}
#if GFX_USE_GINPUT && GINPUT_NEED_KEYBOARD
#if (GFX_USE_GINPUT && GINPUT_NEED_KEYBOARD) || GWIN_NEED_KEYBOARD
GHandle gwinGetFocus(void) {
return _widgetInFocus;
}
@ -254,13 +253,18 @@ static void gwidgetEvent(void *param, GEvent *pe) {
void _gwinMoveFocus(void) {
GHandle gh;
bool_t looponce;
// Find a new focus window (one may or may not exist).
for(gh = gwinGetNextWindow(_widgetInFocus); gh && gh != _widgetInFocus; gh = gwinGetNextWindow(gh)) {
looponce = FALSE;
for(gh = gwinGetNextWindow(_widgetInFocus); ; gh = gwinGetNextWindow(gh)) {
if (!gh && !looponce) {
looponce = TRUE;
gh = gwinGetNextWindow(0);
}
if (gwinSetFocus(gh))
return;
break;
}
gwinSetFocus(0);
}
void _gwinFixFocus(GHandle gh) {

2
src/gwin/gwin_widget.h
View File

@ -356,7 +356,7 @@ bool_t gwinAttachListener(GListener *pl);
bool_t gwinAttachDial(GHandle gh, uint16_t role, uint16_t instance);
#endif
#if (GFX_USE_GINPUT && GINPUT_NEED_KEYBOARD) || defined(__DOXYGEN__)
#if (GFX_USE_GINPUT && GINPUT_NEED_KEYBOARD) || GWIN_NEED_KEYBOARD || defined(__DOXYGEN__)
/**
* @brief Set the keyboard focus to a specific window
* @return Returns TRUE if the focus could be set to that window