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checkkeys: draw the IME composition text

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This commit is contained in:
Sam Lantinga
2024-06-24 18:07:49 -07:00
parent 018ca39c45
commit 382494eeda
1 changed files with 92 additions and 13 deletions
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105
test/checkkeys.c
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@@ -28,35 +28,53 @@
#define CURSOR_BLINK_INTERVAL_MS 500
typedef struct
{
SDLTest_TextWindow *textwindow;
char *edit_text;
int edit_cursor;
int edit_length;
} TextWindowState;
static SDLTest_CommonState *state;
static SDLTest_TextWindow **textwindows;
static TextWindowState *windowstates;
static SDL_bool escape_pressed;
static SDL_bool cursor_visible;
static Uint64 last_cursor_change;
static int done;
static SDLTest_TextWindow *GetTextWindowForWindowID(SDL_WindowID id)
static TextWindowState *GetTextWindowStateForWindowID(SDL_WindowID id)
{
int i;
for (i = 0; i < state->num_windows; ++i) {
if (id == SDL_GetWindowID(state->windows[i])) {
return textwindows[i];
return &windowstates[i];
}
}
return NULL;
}
static SDLTest_TextWindow *GetTextWindowForWindowID(SDL_WindowID id)
{
TextWindowState *windowstate = GetTextWindowStateForWindowID(id);
if (windowstate) {
return windowstate->textwindow;
}
return NULL;
}
static void UpdateTextWindowInputRect(SDL_WindowID id)
{
int i;
for (i = 0; i < state->num_windows; ++i) {
if (id == SDL_GetWindowID(state->windows[i])) {
SDLTest_TextWindow *textwindow = windowstates[i].textwindow;
int w, h;
SDL_Rect rect;
int current = textwindows[i]->current;
const char *current_line = textwindows[i]->lines[current];
int current = textwindow->current;
const char *current_line = textwindow->lines[current];
SDL_GetWindowSize(state->windows[i], &w, &h);
@@ -271,13 +289,18 @@ static void CountKeysDown(void)
static void DrawCursor(int i)
{
SDL_FRect rect;
int current = textwindows[i]->current;
const char *current_line = textwindows[i]->lines[current];
TextWindowState *windowstate = &windowstates[i];
SDLTest_TextWindow *textwindow = windowstate->textwindow;
int current = textwindow->current;
const char *current_line = textwindow->lines[current];
rect.x = TEXT_WINDOW_OFFSET_X;
if (current_line) {
rect.x += SDL_utf8strlen(current_line) * FONT_CHARACTER_SIZE;
}
if (windowstate->edit_cursor > 0) {
rect.x += (float)windowstate->edit_cursor * FONT_CHARACTER_SIZE;
}
rect.y = TEXT_WINDOW_OFFSET_Y + current * FONT_LINE_HEIGHT;
rect.w = FONT_CHARACTER_SIZE * 0.75f;
rect.h = (float)FONT_CHARACTER_SIZE;
@@ -286,6 +309,45 @@ static void DrawCursor(int i)
SDL_RenderFillRect(state->renderers[i], &rect);
}
static void DrawEditText(int i)
{
SDL_FRect rect;
TextWindowState *windowstate = &windowstates[i];
SDLTest_TextWindow *textwindow = windowstate->textwindow;
int current = textwindow->current;
const char *current_line = textwindow->lines[current];
if (windowstate->edit_text == NULL) {
return;
}
/* Draw the highlight under the selected text */
if (windowstate->edit_length > 0) {
rect.x = TEXT_WINDOW_OFFSET_X;
if (current_line) {
rect.x += SDL_utf8strlen(current_line) * FONT_CHARACTER_SIZE;
}
if (windowstate->edit_cursor > 0) {
rect.x += (float)windowstate->edit_cursor * FONT_CHARACTER_SIZE;
}
rect.y = TEXT_WINDOW_OFFSET_Y + current * FONT_LINE_HEIGHT;
rect.w = (float)windowstate->edit_length * FONT_CHARACTER_SIZE;
rect.h = (float)FONT_CHARACTER_SIZE;
SDL_SetRenderDrawColor(state->renderers[i], 0xAA, 0xAA, 0xAA, 255);
SDL_RenderFillRect(state->renderers[i], &rect);
}
/* Draw the edit text */
rect.x = TEXT_WINDOW_OFFSET_X;
if (current_line) {
rect.x += SDL_utf8strlen(current_line) * FONT_CHARACTER_SIZE;
}
rect.y = TEXT_WINDOW_OFFSET_Y + current * FONT_LINE_HEIGHT;
SDL_SetRenderDrawColor(state->renderers[i], 255, 255, 0, 255);
SDLTest_DrawString(state->renderers[i], rect.x, rect.y, windowstate->edit_text);
}
static void loop(void)
{
SDL_Event event;
@@ -325,9 +387,22 @@ static void loop(void)
CountKeysDown();
break;
case SDL_EVENT_TEXT_EDITING:
{
TextWindowState *windowstate = GetTextWindowStateForWindowID(event.edit.windowID);
if (windowstate->edit_text) {
SDL_free(windowstate->edit_text);
windowstate->edit_text = NULL;
}
if (event.edit.text && *event.edit.text) {
windowstate->edit_text = SDL_strdup(event.edit.text);
}
windowstate->edit_cursor = event.edit.start;
windowstate->edit_length = event.edit.length;
SDL_snprintf(line, sizeof(line), "EDIT %" SDL_PRIs32 ":%" SDL_PRIs32, event.edit.start, event.edit.length);
PrintText(line, event.edit.text);
break;
}
case SDL_EVENT_TEXT_INPUT:
PrintText("INPUT", event.text.text);
SDLTest_TextWindowAddText(GetTextWindowForWindowID(event.text.windowID), "%s", event.text.text);
@@ -381,7 +456,7 @@ static void loop(void)
SDL_SetRenderDrawColor(state->renderers[i], 255, 255, 255, 255);
SDL_snprintf(caption, sizeof(caption), "Text input %s (click right mouse button to toggle)\n", SDL_TextInputActive(state->windows[i]) ? "enabled" : "disabled");
SDLTest_DrawString(state->renderers[i], TEXT_WINDOW_OFFSET_X, TEXT_WINDOW_OFFSET_X, caption);
SDLTest_TextWindowDisplay(textwindows[i], state->renderers[i]);
SDLTest_TextWindowDisplay(windowstates[i].textwindow, state->renderers[i]);
/* Draw the cursor */
if ((now - last_cursor_change) >= CURSOR_BLINK_INTERVAL_MS) {
@@ -391,6 +466,10 @@ static void loop(void)
if (cursor_visible) {
DrawCursor(i);
}
/* Draw the composition text */
DrawEditText(i);
SDL_RenderPresent(state->renderers[i]);
}
@@ -434,8 +513,8 @@ int main(int argc, char *argv[])
return 1;
}
textwindows = (SDLTest_TextWindow **)SDL_malloc(state->num_windows * sizeof(*textwindows));
if (!textwindows) {
windowstates = (TextWindowState *)SDL_calloc(state->num_windows, sizeof(*windowstates));
if (!windowstates) {
SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't allocate text windows: %s\n", SDL_GetError());
goto done;
}
@@ -449,7 +528,7 @@ int main(int argc, char *argv[])
rect.y = TEXT_WINDOW_OFFSET_Y;
rect.w = w - (2 * TEXT_WINDOW_OFFSET_X);
rect.h = h - TEXT_WINDOW_OFFSET_Y;
textwindows[i] = SDLTest_TextWindowCreate(rect.x, rect.y, rect.w, rect.h);
windowstates[i].textwindow = SDLTest_TextWindowCreate(rect.x, rect.y, rect.w, rect.h);
}
#ifdef SDL_PLATFORM_IOS
@@ -488,9 +567,9 @@ int main(int argc, char *argv[])
done:
for (i = 0; i < state->num_windows; ++i) {
SDLTest_TextWindowDestroy(textwindows[i]);
SDLTest_TextWindowDestroy(windowstates[i].textwindow);
}
SDL_free(textwindows);
SDL_free(windowstates);
SDLTest_CleanupTextDrawing();
SDLTest_CommonQuit(state);
return 0;