421 lines
14 KiB
C
421 lines
14 KiB
C
// widgetComboBox.c — ComboBox widget (editable text + dropdown list)
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#include "widgetInternal.h"
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// ============================================================
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// wgtComboBox
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// ============================================================
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WidgetT *wgtComboBox(WidgetT *parent, int32_t maxLen) {
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WidgetT *w = widgetAlloc(parent, WidgetComboBoxE);
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if (w) {
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int32_t bufSize = maxLen > 0 ? maxLen + 1 : 256;
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w->as.comboBox.buf = (char *)malloc(bufSize);
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w->as.comboBox.undoBuf = (char *)malloc(bufSize);
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w->as.comboBox.bufSize = bufSize;
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if (!w->as.comboBox.buf || !w->as.comboBox.undoBuf) {
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free(w->as.comboBox.buf);
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free(w->as.comboBox.undoBuf);
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w->as.comboBox.buf = NULL;
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w->as.comboBox.undoBuf = NULL;
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} else {
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w->as.comboBox.buf[0] = '\0';
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}
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w->as.comboBox.selStart = -1;
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w->as.comboBox.selEnd = -1;
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w->as.comboBox.selectedIdx = -1;
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w->weight = 100;
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}
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return w;
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}
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// ============================================================
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// wgtComboBoxGetSelected
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// ============================================================
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int32_t wgtComboBoxGetSelected(const WidgetT *w) {
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VALIDATE_WIDGET(w, WidgetComboBoxE, -1);
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return w->as.comboBox.selectedIdx;
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}
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// ============================================================
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// wgtComboBoxSetItems
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// ============================================================
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void wgtComboBoxSetItems(WidgetT *w, const char **items, int32_t count) {
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VALIDATE_WIDGET_VOID(w, WidgetComboBoxE);
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w->as.comboBox.items = items;
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w->as.comboBox.itemCount = count;
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// Cache max item strlen to avoid recomputing in calcMinSize
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int32_t maxLen = 0;
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for (int32_t i = 0; i < count; i++) {
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int32_t slen = (int32_t)strlen(items[i]);
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if (slen > maxLen) {
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maxLen = slen;
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}
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}
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w->as.comboBox.maxItemLen = maxLen;
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if (w->as.comboBox.selectedIdx >= count) {
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w->as.comboBox.selectedIdx = -1;
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}
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wgtInvalidate(w);
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}
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// ============================================================
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// wgtComboBoxSetSelected
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// ============================================================
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void wgtComboBoxSetSelected(WidgetT *w, int32_t idx) {
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VALIDATE_WIDGET_VOID(w, WidgetComboBoxE);
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w->as.comboBox.selectedIdx = idx;
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// Copy selected item text to buffer
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if (idx >= 0 && idx < w->as.comboBox.itemCount && w->as.comboBox.buf) {
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strncpy(w->as.comboBox.buf, w->as.comboBox.items[idx], w->as.comboBox.bufSize - 1);
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w->as.comboBox.buf[w->as.comboBox.bufSize - 1] = '\0';
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w->as.comboBox.len = (int32_t)strlen(w->as.comboBox.buf);
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w->as.comboBox.cursorPos = w->as.comboBox.len;
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w->as.comboBox.scrollOff = 0;
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w->as.comboBox.selStart = -1;
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w->as.comboBox.selEnd = -1;
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}
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wgtInvalidatePaint(w);
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}
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// ============================================================
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// widgetComboBoxCalcMinSize
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// ============================================================
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void widgetComboBoxCalcMinSize(WidgetT *w, const BitmapFontT *font) {
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int32_t maxItemW = w->as.comboBox.maxItemLen * font->charWidth;
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int32_t minW = font->charWidth * 8;
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if (maxItemW < minW) {
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maxItemW = minW;
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}
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w->calcMinW = maxItemW + DROPDOWN_BTN_WIDTH + TEXT_INPUT_PAD * 2 + 4;
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w->calcMinH = font->charHeight + TEXT_INPUT_PAD * 2;
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}
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// ============================================================
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// widgetComboBoxDestroy
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// ============================================================
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void widgetComboBoxDestroy(WidgetT *w) {
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free(w->as.comboBox.buf);
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free(w->as.comboBox.undoBuf);
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}
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// ============================================================
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// widgetComboBoxGetText
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// ============================================================
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const char *widgetComboBoxGetText(const WidgetT *w) {
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return w->as.comboBox.buf ? w->as.comboBox.buf : "";
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}
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// ============================================================
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// widgetComboBoxOnKey
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// ============================================================
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void widgetComboBoxOnKey(WidgetT *w, int32_t key, int32_t mod) {
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if (w->as.comboBox.open) {
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if (key == (0x48 | 0x100)) {
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if (w->as.comboBox.hoverIdx > 0) {
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w->as.comboBox.hoverIdx--;
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if (w->as.comboBox.hoverIdx < w->as.comboBox.listScrollPos) {
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w->as.comboBox.listScrollPos = w->as.comboBox.hoverIdx;
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}
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}
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wgtInvalidatePaint(w);
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return;
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}
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if (key == (0x50 | 0x100)) {
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if (w->as.comboBox.hoverIdx < w->as.comboBox.itemCount - 1) {
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w->as.comboBox.hoverIdx++;
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if (w->as.comboBox.hoverIdx >= w->as.comboBox.listScrollPos + DROPDOWN_MAX_VISIBLE) {
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w->as.comboBox.listScrollPos = w->as.comboBox.hoverIdx - DROPDOWN_MAX_VISIBLE + 1;
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}
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}
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wgtInvalidatePaint(w);
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return;
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}
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if (key == 0x0D) {
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int32_t idx = w->as.comboBox.hoverIdx;
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if (idx >= 0 && idx < w->as.comboBox.itemCount) {
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w->as.comboBox.selectedIdx = idx;
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const char *itemText = w->as.comboBox.items[idx];
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strncpy(w->as.comboBox.buf, itemText, w->as.comboBox.bufSize - 1);
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w->as.comboBox.buf[w->as.comboBox.bufSize - 1] = '\0';
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w->as.comboBox.len = (int32_t)strlen(w->as.comboBox.buf);
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w->as.comboBox.cursorPos = w->as.comboBox.len;
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w->as.comboBox.scrollOff = 0;
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w->as.comboBox.selStart = -1;
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w->as.comboBox.selEnd = -1;
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}
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w->as.comboBox.open = false;
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sOpenPopup = NULL;
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if (w->onChange) {
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w->onChange(w);
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}
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wgtInvalidatePaint(w);
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return;
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}
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}
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// Down arrow on closed combobox opens the popup
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if (!w->as.comboBox.open && key == (0x50 | 0x100)) {
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w->as.comboBox.open = true;
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w->as.comboBox.hoverIdx = w->as.comboBox.selectedIdx;
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sOpenPopup = w;
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if (w->as.comboBox.hoverIdx >= w->as.comboBox.listScrollPos + DROPDOWN_MAX_VISIBLE) {
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w->as.comboBox.listScrollPos = w->as.comboBox.hoverIdx - DROPDOWN_MAX_VISIBLE + 1;
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}
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if (w->as.comboBox.hoverIdx < w->as.comboBox.listScrollPos) {
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w->as.comboBox.listScrollPos = w->as.comboBox.hoverIdx;
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}
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wgtInvalidatePaint(w);
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return;
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}
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// Text editing (when popup is closed, or non-navigation keys with popup open)
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if (!w->as.comboBox.buf) {
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return;
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}
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clearOtherSelections(w);
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widgetTextEditOnKey(w, key, mod, w->as.comboBox.buf, w->as.comboBox.bufSize,
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&w->as.comboBox.len, &w->as.comboBox.cursorPos,
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&w->as.comboBox.scrollOff,
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&w->as.comboBox.selStart, &w->as.comboBox.selEnd,
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w->as.comboBox.undoBuf, &w->as.comboBox.undoLen,
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&w->as.comboBox.undoCursor);
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}
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// ============================================================
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// widgetComboBoxOnMouse
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// ============================================================
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void widgetComboBoxOnMouse(WidgetT *w, WidgetT *root, int32_t vx, int32_t vy) {
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w->focused = true;
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// Check if click is on the button area
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int32_t textAreaW = w->w - DROPDOWN_BTN_WIDTH;
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if (vx >= w->x + textAreaW) {
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// If this combobox's popup was just closed by click-outside, don't re-open
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if (w == sClosedPopup) {
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return;
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}
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// Button click — toggle popup
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w->as.comboBox.open = !w->as.comboBox.open;
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w->as.comboBox.hoverIdx = w->as.comboBox.selectedIdx;
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sOpenPopup = w->as.comboBox.open ? w : NULL;
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} else {
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// Text area click — focus for editing
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clearOtherSelections(w);
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AppContextT *ctx = (AppContextT *)root->userData;
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const BitmapFontT *font = &ctx->font;
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int32_t relX = vx - w->x - TEXT_INPUT_PAD;
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int32_t charPos = relX / font->charWidth + w->as.comboBox.scrollOff;
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if (charPos < 0) {
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charPos = 0;
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}
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if (charPos > w->as.comboBox.len) {
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charPos = w->as.comboBox.len;
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}
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int32_t clicks = multiClickDetect(vx, vy);
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if (clicks >= 3) {
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// Triple-click: select all (single line)
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w->as.comboBox.selStart = 0;
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w->as.comboBox.selEnd = w->as.comboBox.len;
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w->as.comboBox.cursorPos = w->as.comboBox.len;
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sDragTextSelect = NULL;
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return;
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}
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if (clicks == 2 && w->as.comboBox.buf) {
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// Double-click: select word
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int32_t ws = wordStart(w->as.comboBox.buf, charPos);
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int32_t we = wordEnd(w->as.comboBox.buf, w->as.comboBox.len, charPos);
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w->as.comboBox.selStart = ws;
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w->as.comboBox.selEnd = we;
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w->as.comboBox.cursorPos = we;
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sDragTextSelect = NULL;
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return;
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}
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// Single click: place cursor + start drag-select
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w->as.comboBox.cursorPos = charPos;
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w->as.comboBox.selStart = charPos;
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w->as.comboBox.selEnd = charPos;
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sDragTextSelect = w;
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}
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}
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// ============================================================
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// widgetComboBoxPaint
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// ============================================================
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void widgetComboBoxPaint(WidgetT *w, DisplayT *d, const BlitOpsT *ops, const BitmapFontT *font, const ColorSchemeT *colors) {
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uint32_t fg = w->enabled ? (w->fgColor ? w->fgColor : colors->contentFg) : colors->windowShadow;
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uint32_t bg = w->bgColor ? w->bgColor : colors->contentBg;
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// Sunken text area
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int32_t textAreaW = w->w - DROPDOWN_BTN_WIDTH;
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BevelStyleT bevel;
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bevel.highlight = colors->windowShadow;
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bevel.shadow = colors->windowHighlight;
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bevel.face = bg;
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bevel.width = 2;
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drawBevel(d, ops, w->x, w->y, textAreaW, w->h, &bevel);
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// Draw text content
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if (w->as.comboBox.buf) {
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int32_t textX = w->x + TEXT_INPUT_PAD;
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int32_t textY = w->y + (w->h - font->charHeight) / 2;
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int32_t maxChars = (textAreaW - TEXT_INPUT_PAD * 2 - 4) / font->charWidth;
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int32_t off = w->as.comboBox.scrollOff;
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int32_t len = w->as.comboBox.len - off;
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if (len > maxChars) {
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len = maxChars;
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}
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// Selection range
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int32_t selLo = -1;
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int32_t selHi = -1;
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if (w->as.comboBox.selStart >= 0 && w->as.comboBox.selEnd >= 0 && w->as.comboBox.selStart != w->as.comboBox.selEnd) {
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selLo = w->as.comboBox.selStart < w->as.comboBox.selEnd ? w->as.comboBox.selStart : w->as.comboBox.selEnd;
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selHi = w->as.comboBox.selStart < w->as.comboBox.selEnd ? w->as.comboBox.selEnd : w->as.comboBox.selStart;
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}
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// Draw up to 3 runs: before selection, selection, after selection
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int32_t visSelLo = selLo - off;
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int32_t visSelHi = selHi - off;
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if (visSelLo < 0) { visSelLo = 0; }
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if (visSelHi > len) { visSelHi = len; }
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if (selLo >= 0 && visSelLo < visSelHi) {
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if (visSelLo > 0) {
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drawTextN(d, ops, font, textX, textY, w->as.comboBox.buf + off, visSelLo, fg, bg, true);
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}
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drawTextN(d, ops, font, textX + visSelLo * font->charWidth, textY, w->as.comboBox.buf + off + visSelLo, visSelHi - visSelLo, colors->menuHighlightFg, colors->menuHighlightBg, true);
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if (visSelHi < len) {
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drawTextN(d, ops, font, textX + visSelHi * font->charWidth, textY, w->as.comboBox.buf + off + visSelHi, len - visSelHi, fg, bg, true);
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}
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} else {
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drawTextN(d, ops, font, textX, textY, w->as.comboBox.buf + off, len, fg, bg, true);
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}
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// Draw cursor
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if (w->focused && w->enabled && !w->as.comboBox.open) {
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int32_t cursorX = textX + (w->as.comboBox.cursorPos - off) * font->charWidth;
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if (cursorX >= w->x + TEXT_INPUT_PAD &&
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cursorX < w->x + textAreaW - TEXT_INPUT_PAD) {
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drawVLine(d, ops, cursorX, textY, font->charHeight, fg);
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}
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}
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}
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// Drop button
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BevelStyleT btnBevel;
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btnBevel.highlight = w->as.comboBox.open ? colors->windowShadow : colors->windowHighlight;
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btnBevel.shadow = w->as.comboBox.open ? colors->windowHighlight : colors->windowShadow;
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btnBevel.face = colors->buttonFace;
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btnBevel.width = 2;
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drawBevel(d, ops, w->x + textAreaW, w->y, DROPDOWN_BTN_WIDTH, w->h, &btnBevel);
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// Down arrow
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uint32_t arrowFg = w->enabled ? colors->contentFg : colors->windowShadow;
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int32_t arrowX = w->x + textAreaW + DROPDOWN_BTN_WIDTH / 2;
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int32_t arrowY = w->y + w->h / 2 - 1;
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for (int32_t i = 0; i < 4; i++) {
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drawHLine(d, ops, arrowX - 3 + i, arrowY + i, 7 - i * 2, arrowFg);
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}
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}
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// ============================================================
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// widgetComboBoxPaintPopup
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// ============================================================
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void widgetComboBoxPaintPopup(WidgetT *w, DisplayT *d, const BlitOpsT *ops, const BitmapFontT *font, const ColorSchemeT *colors) {
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int32_t popX;
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int32_t popY;
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int32_t popW;
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int32_t popH;
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widgetDropdownPopupRect(w, font, d->clipH, &popX, &popY, &popW, &popH);
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widgetPaintPopupList(d, ops, font, colors, popX, popY, popW, popH, w->as.comboBox.items, w->as.comboBox.itemCount, w->as.comboBox.hoverIdx, w->as.comboBox.listScrollPos);
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}
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// ============================================================
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// widgetComboBoxSetText
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// ============================================================
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void widgetComboBoxSetText(WidgetT *w, const char *text) {
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if (w->as.comboBox.buf) {
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strncpy(w->as.comboBox.buf, text, w->as.comboBox.bufSize - 1);
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w->as.comboBox.buf[w->as.comboBox.bufSize - 1] = '\0';
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w->as.comboBox.len = (int32_t)strlen(w->as.comboBox.buf);
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w->as.comboBox.cursorPos = w->as.comboBox.len;
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w->as.comboBox.scrollOff = 0;
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w->as.comboBox.selStart = -1;
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w->as.comboBox.selEnd = -1;
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}
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}
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