285 lines
8.9 KiB
C
285 lines
8.9 KiB
C
// widgetDropdown.c — Dropdown (select) widget
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#include "widgetInternal.h"
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// ============================================================
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// wgtDropdown
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// ============================================================
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WidgetT *wgtDropdown(WidgetT *parent) {
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WidgetT *w = widgetAlloc(parent, WidgetDropdownE);
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if (w) {
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w->as.dropdown.selectedIdx = -1;
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w->as.dropdown.hoverIdx = -1;
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}
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return w;
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}
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// ============================================================
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// wgtDropdownGetSelected
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// ============================================================
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int32_t wgtDropdownGetSelected(const WidgetT *w) {
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if (!w || w->type != WidgetDropdownE) {
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return -1;
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}
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return w->as.dropdown.selectedIdx;
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}
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// ============================================================
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// wgtDropdownSetItems
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// ============================================================
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void wgtDropdownSetItems(WidgetT *w, const char **items, int32_t count) {
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if (!w || w->type != WidgetDropdownE) {
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return;
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}
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w->as.dropdown.items = items;
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w->as.dropdown.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.dropdown.maxItemLen = maxLen;
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if (w->as.dropdown.selectedIdx >= count) {
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w->as.dropdown.selectedIdx = -1;
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}
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}
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// ============================================================
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// wgtDropdownSetSelected
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// ============================================================
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void wgtDropdownSetSelected(WidgetT *w, int32_t idx) {
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if (!w || w->type != WidgetDropdownE) {
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return;
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}
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w->as.dropdown.selectedIdx = idx;
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}
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// ============================================================
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// widgetDropdownGetText
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// ============================================================
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const char *widgetDropdownGetText(const WidgetT *w) {
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if (w->as.dropdown.selectedIdx >= 0 && w->as.dropdown.selectedIdx < w->as.dropdown.itemCount) {
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return w->as.dropdown.items[w->as.dropdown.selectedIdx];
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}
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return "";
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}
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// ============================================================
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// widgetDropdownCalcMinSize
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// ============================================================
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void widgetDropdownCalcMinSize(WidgetT *w, const BitmapFontT *font) {
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// Width: widest item + button width + border
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int32_t maxItemW = w->as.dropdown.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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// widgetDropdownOnKey
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// ============================================================
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void widgetDropdownOnKey(WidgetT *w, int32_t key, int32_t mod) {
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(void)mod;
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if (w->as.dropdown.open) {
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// Popup is open — navigate items
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if (key == (0x48 | 0x100)) {
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if (w->as.dropdown.hoverIdx > 0) {
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w->as.dropdown.hoverIdx--;
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if (w->as.dropdown.hoverIdx < w->as.dropdown.scrollPos) {
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w->as.dropdown.scrollPos = w->as.dropdown.hoverIdx;
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}
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}
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} else if (key == (0x50 | 0x100)) {
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if (w->as.dropdown.hoverIdx < w->as.dropdown.itemCount - 1) {
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w->as.dropdown.hoverIdx++;
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if (w->as.dropdown.hoverIdx >= w->as.dropdown.scrollPos + DROPDOWN_MAX_VISIBLE) {
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w->as.dropdown.scrollPos = w->as.dropdown.hoverIdx - DROPDOWN_MAX_VISIBLE + 1;
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}
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}
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} else if (key == 0x0D || key == ' ') {
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w->as.dropdown.selectedIdx = w->as.dropdown.hoverIdx;
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w->as.dropdown.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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}
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} else {
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// Popup is closed
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if (key == (0x50 | 0x100) || key == ' ' || key == 0x0D) {
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w->as.dropdown.open = true;
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w->as.dropdown.hoverIdx = w->as.dropdown.selectedIdx;
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sOpenPopup = w;
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if (w->as.dropdown.hoverIdx >= w->as.dropdown.scrollPos + DROPDOWN_MAX_VISIBLE) {
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w->as.dropdown.scrollPos = w->as.dropdown.hoverIdx - DROPDOWN_MAX_VISIBLE + 1;
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}
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if (w->as.dropdown.hoverIdx < w->as.dropdown.scrollPos) {
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w->as.dropdown.scrollPos = w->as.dropdown.hoverIdx;
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}
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} else if (key == (0x48 | 0x100)) {
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if (w->as.dropdown.selectedIdx > 0) {
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w->as.dropdown.selectedIdx--;
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if (w->onChange) {
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w->onChange(w);
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}
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}
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}
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}
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wgtInvalidatePaint(w);
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}
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// ============================================================
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// widgetDropdownOnMouse
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// ============================================================
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void widgetDropdownOnMouse(WidgetT *w, WidgetT *root, int32_t vx, int32_t vy) {
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(void)root;
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(void)vx;
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(void)vy;
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w->focused = true;
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// If this dropdown'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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w->as.dropdown.open = !w->as.dropdown.open;
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w->as.dropdown.hoverIdx = w->as.dropdown.selectedIdx;
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sOpenPopup = w->as.dropdown.open ? w : NULL;
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}
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// ============================================================
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// widgetDropdownPaint
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// ============================================================
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void widgetDropdownPaint(WidgetT *w, DisplayT *d, const BlitOpsT *ops, const BitmapFontT *font, const ColorSchemeT *colors) {
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uint32_t fg = w->fgColor ? w->fgColor : colors->contentFg;
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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 selected item text
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if (w->as.dropdown.selectedIdx >= 0 && w->as.dropdown.selectedIdx < w->as.dropdown.itemCount) {
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drawText(d, ops, font, w->x + TEXT_INPUT_PAD,
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w->y + (w->h - font->charHeight) / 2,
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w->as.dropdown.items[w->as.dropdown.selectedIdx], fg, bg, true);
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}
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// Drop button
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BevelStyleT btnBevel;
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btnBevel.highlight = w->as.dropdown.open ? colors->windowShadow : colors->windowHighlight;
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btnBevel.shadow = w->as.dropdown.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 in button
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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, colors->contentFg);
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}
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if (w->focused) {
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drawFocusRect(d, ops, w->x + 3, w->y + 3, textAreaW - 6, w->h - 6, fg);
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}
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}
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// ============================================================
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// widgetDropdownPaintPopup
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// ============================================================
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void widgetDropdownPaintPopup(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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// Draw popup border
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BevelStyleT bevel;
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bevel.highlight = colors->windowHighlight;
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bevel.shadow = colors->windowShadow;
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bevel.face = colors->contentBg;
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bevel.width = 2;
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drawBevel(d, ops, popX, popY, popW, popH, &bevel);
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// Draw items
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int32_t itemCount = w->as.dropdown.itemCount;
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const char **items = w->as.dropdown.items;
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int32_t hoverIdx = w->as.dropdown.hoverIdx;
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int32_t scrollPos = w->as.dropdown.scrollPos;
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int32_t visibleItems = popH / font->charHeight;
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int32_t textX = popX + TEXT_INPUT_PAD;
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int32_t textY = popY + 2;
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int32_t textW = popW - TEXT_INPUT_PAD * 2 - 4;
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for (int32_t i = 0; i < visibleItems && (scrollPos + i) < itemCount; i++) {
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int32_t idx = scrollPos + i;
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int32_t iy = textY + i * font->charHeight;
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uint32_t ifg = colors->contentFg;
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uint32_t ibg = colors->contentBg;
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if (idx == hoverIdx) {
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ifg = colors->menuHighlightFg;
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ibg = colors->menuHighlightBg;
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rectFill(d, ops, popX + 2, iy, textW + TEXT_INPUT_PAD * 2, font->charHeight, ibg);
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}
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drawText(d, ops, font, textX, iy, items[idx], ifg, ibg, false);
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}
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}
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