341 lines
10 KiB
C
341 lines
10 KiB
C
// widgetListBox.c — ListBox widget
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#include "widgetInternal.h"
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#define LISTBOX_BORDER 2
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#define LISTBOX_PAD 2
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#define LISTBOX_MIN_ROWS 4
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#define LISTBOX_SB_W 14
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// ============================================================
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// wgtListBox
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// ============================================================
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WidgetT *wgtListBox(WidgetT *parent) {
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WidgetT *w = widgetAlloc(parent, WidgetListBoxE);
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if (w) {
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w->as.listBox.selectedIdx = -1;
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}
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return w;
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}
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// ============================================================
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// wgtListBoxGetSelected
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// ============================================================
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int32_t wgtListBoxGetSelected(const WidgetT *w) {
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if (!w || w->type != WidgetListBoxE) {
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return -1;
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}
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return w->as.listBox.selectedIdx;
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}
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// ============================================================
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// wgtListBoxSetItems
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// ============================================================
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void wgtListBoxSetItems(WidgetT *w, const char **items, int32_t count) {
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if (!w || w->type != WidgetListBoxE) {
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return;
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}
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w->as.listBox.items = items;
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w->as.listBox.itemCount = count;
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if (w->as.listBox.selectedIdx >= count) {
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w->as.listBox.selectedIdx = count > 0 ? 0 : -1;
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}
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if (w->as.listBox.selectedIdx < 0 && count > 0) {
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w->as.listBox.selectedIdx = 0;
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}
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}
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// ============================================================
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// wgtListBoxSetSelected
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// ============================================================
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void wgtListBoxSetSelected(WidgetT *w, int32_t idx) {
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if (!w || w->type != WidgetListBoxE) {
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return;
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}
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w->as.listBox.selectedIdx = idx;
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}
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// ============================================================
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// widgetListBoxCalcMinSize
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// ============================================================
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void widgetListBoxCalcMinSize(WidgetT *w, const BitmapFontT *font) {
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int32_t maxItemW = font->charWidth * 8;
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for (int32_t i = 0; i < w->as.listBox.itemCount; i++) {
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int32_t iw = (int32_t)strlen(w->as.listBox.items[i]) * font->charWidth;
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if (iw > maxItemW) {
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maxItemW = iw;
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}
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}
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w->calcMinW = maxItemW + LISTBOX_PAD * 2 + LISTBOX_BORDER * 2 + LISTBOX_SB_W;
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w->calcMinH = LISTBOX_MIN_ROWS * font->charHeight + LISTBOX_BORDER * 2;
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}
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// ============================================================
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// widgetListBoxOnKey
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// ============================================================
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void widgetListBoxOnKey(WidgetT *w, int32_t key, int32_t mod) {
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(void)mod;
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if (!w || w->type != WidgetListBoxE || w->as.listBox.itemCount == 0) {
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return;
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}
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int32_t sel = w->as.listBox.selectedIdx;
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if (key == (0x50 | 0x100)) {
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// Down arrow
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if (sel < w->as.listBox.itemCount - 1) {
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w->as.listBox.selectedIdx = sel + 1;
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} else if (sel < 0) {
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w->as.listBox.selectedIdx = 0;
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}
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} else if (key == (0x48 | 0x100)) {
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// Up arrow
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if (sel > 0) {
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w->as.listBox.selectedIdx = sel - 1;
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} else if (sel < 0) {
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w->as.listBox.selectedIdx = 0;
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}
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} else if (key == (0x47 | 0x100)) {
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// Home
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w->as.listBox.selectedIdx = 0;
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} else if (key == (0x4F | 0x100)) {
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// End
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w->as.listBox.selectedIdx = w->as.listBox.itemCount - 1;
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} else {
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return;
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}
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// Scroll to keep selection visible
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if (w->as.listBox.selectedIdx >= 0) {
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AppContextT *ctx = (AppContextT *)w->window->widgetRoot->userData;
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const BitmapFontT *font = &ctx->font;
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int32_t innerH = w->h - LISTBOX_BORDER * 2;
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int32_t visibleRows = innerH / font->charHeight;
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if (w->as.listBox.selectedIdx < w->as.listBox.scrollPos) {
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w->as.listBox.scrollPos = w->as.listBox.selectedIdx;
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} else if (w->as.listBox.selectedIdx >= w->as.listBox.scrollPos + visibleRows) {
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w->as.listBox.scrollPos = w->as.listBox.selectedIdx - visibleRows + 1;
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}
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}
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if (w->onChange) {
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w->onChange(w);
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}
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wgtInvalidate(w);
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}
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// ============================================================
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// widgetListBoxOnMouse
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// ============================================================
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void widgetListBoxOnMouse(WidgetT *hit, WidgetT *root, int32_t vx, int32_t vy) {
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AppContextT *ctx = (AppContextT *)root->userData;
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const BitmapFontT *font = &ctx->font;
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int32_t innerH = hit->h - LISTBOX_BORDER * 2;
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int32_t visibleRows = innerH / font->charHeight;
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bool needSb = (hit->as.listBox.itemCount > visibleRows);
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// Clamp scroll
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int32_t maxScroll = hit->as.listBox.itemCount - visibleRows;
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if (maxScroll < 0) {
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maxScroll = 0;
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}
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hit->as.listBox.scrollPos = clampInt(hit->as.listBox.scrollPos, 0, maxScroll);
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// Check if click is on the scrollbar
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if (needSb) {
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int32_t sbX = hit->x + hit->w - LISTBOX_BORDER - LISTBOX_SB_W;
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if (vx >= sbX) {
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int32_t sbY = hit->y + LISTBOX_BORDER;
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int32_t sbH = innerH;
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int32_t relY = vy - sbY;
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int32_t trackLen = sbH - LISTBOX_SB_W * 2;
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if (relY < LISTBOX_SB_W) {
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// Up arrow
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if (hit->as.listBox.scrollPos > 0) {
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hit->as.listBox.scrollPos--;
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}
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} else if (relY >= sbH - LISTBOX_SB_W) {
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// Down arrow
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if (hit->as.listBox.scrollPos < maxScroll) {
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hit->as.listBox.scrollPos++;
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}
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} else if (trackLen > 0) {
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// Track — page up/down
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int32_t thumbPos;
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int32_t thumbSize;
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widgetScrollbarThumb(trackLen, hit->as.listBox.itemCount, visibleRows, hit->as.listBox.scrollPos, &thumbPos, &thumbSize);
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int32_t trackRelY = relY - LISTBOX_SB_W;
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if (trackRelY < thumbPos) {
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hit->as.listBox.scrollPos -= visibleRows;
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hit->as.listBox.scrollPos = clampInt(hit->as.listBox.scrollPos, 0, maxScroll);
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} else if (trackRelY >= thumbPos + thumbSize) {
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hit->as.listBox.scrollPos += visibleRows;
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hit->as.listBox.scrollPos = clampInt(hit->as.listBox.scrollPos, 0, maxScroll);
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}
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}
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hit->focused = true;
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return;
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}
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}
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// Click on item area
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int32_t innerY = hit->y + LISTBOX_BORDER;
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int32_t relY = vy - innerY;
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if (relY < 0) {
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return;
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}
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int32_t clickedRow = relY / font->charHeight;
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int32_t idx = hit->as.listBox.scrollPos + clickedRow;
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if (idx >= 0 && idx < hit->as.listBox.itemCount) {
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hit->as.listBox.selectedIdx = idx;
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hit->focused = true;
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if (hit->onChange) {
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hit->onChange(hit);
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}
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}
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}
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// ============================================================
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// widgetListBoxPaint
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// ============================================================
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void widgetListBoxPaint(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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int32_t innerH = w->h - LISTBOX_BORDER * 2;
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int32_t visibleRows = innerH / font->charHeight;
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bool needSb = (w->as.listBox.itemCount > visibleRows);
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int32_t contentW = w->w - LISTBOX_BORDER * 2;
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if (needSb) {
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contentW -= LISTBOX_SB_W;
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}
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// Sunken border
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BevelStyleT bevel = BEVEL_SUNKEN(colors, bg, 2);
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drawBevel(d, ops, w->x, w->y, w->w, w->h, &bevel);
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// Clamp scroll position
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int32_t maxScroll = w->as.listBox.itemCount - visibleRows;
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if (maxScroll < 0) {
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maxScroll = 0;
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}
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w->as.listBox.scrollPos = clampInt(w->as.listBox.scrollPos, 0, maxScroll);
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// Draw items
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int32_t innerX = w->x + LISTBOX_BORDER + LISTBOX_PAD;
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int32_t innerY = w->y + LISTBOX_BORDER;
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int32_t scrollPos = w->as.listBox.scrollPos;
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for (int32_t i = 0; i < visibleRows && (scrollPos + i) < w->as.listBox.itemCount; i++) {
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int32_t idx = scrollPos + i;
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int32_t iy = innerY + i * font->charHeight;
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uint32_t ifg = fg;
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uint32_t ibg = bg;
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if (idx == w->as.listBox.selectedIdx) {
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ifg = colors->menuHighlightFg;
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ibg = colors->menuHighlightBg;
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rectFill(d, ops, w->x + LISTBOX_BORDER, iy, contentW, font->charHeight, ibg);
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}
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drawText(d, ops, font, innerX, iy, w->as.listBox.items[idx], ifg, ibg, idx == w->as.listBox.selectedIdx);
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}
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// Draw scrollbar
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if (needSb) {
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int32_t sbX = w->x + w->w - LISTBOX_BORDER - LISTBOX_SB_W;
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int32_t sbY = w->y + LISTBOX_BORDER;
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int32_t sbH = innerH;
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// Trough
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BevelStyleT troughBevel = BEVEL_TROUGH(colors);
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drawBevel(d, ops, sbX, sbY, LISTBOX_SB_W, sbH, &troughBevel);
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// Up arrow button
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BevelStyleT btnBevel = BEVEL_RAISED(colors, 1);
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drawBevel(d, ops, sbX, sbY, LISTBOX_SB_W, LISTBOX_SB_W, &btnBevel);
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// Up arrow triangle
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{
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int32_t cx = sbX + LISTBOX_SB_W / 2;
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int32_t cy = sbY + LISTBOX_SB_W / 2;
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for (int32_t i = 0; i < 4; i++) {
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drawHLine(d, ops, cx - i, cy - 2 + i, 1 + i * 2, colors->contentFg);
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}
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}
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// Down arrow button
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int32_t downY = sbY + sbH - LISTBOX_SB_W;
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drawBevel(d, ops, sbX, downY, LISTBOX_SB_W, LISTBOX_SB_W, &btnBevel);
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// Down arrow triangle
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{
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int32_t cx = sbX + LISTBOX_SB_W / 2;
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int32_t cy = downY + LISTBOX_SB_W / 2;
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for (int32_t i = 0; i < 4; i++) {
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drawHLine(d, ops, cx - i, cy + 2 - i, 1 + i * 2, colors->contentFg);
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}
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}
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// Thumb
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int32_t trackLen = sbH - LISTBOX_SB_W * 2;
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if (trackLen > 0) {
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int32_t thumbPos;
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int32_t thumbSize;
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widgetScrollbarThumb(trackLen, w->as.listBox.itemCount, visibleRows, w->as.listBox.scrollPos, &thumbPos, &thumbSize);
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drawBevel(d, ops, sbX, sbY + LISTBOX_SB_W + thumbPos, LISTBOX_SB_W, thumbSize, &btnBevel);
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}
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}
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if (w->focused) {
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drawFocusRect(d, ops, w->x + 1, w->y + 1, w->w - 2, w->h - 2, fg);
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}
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}
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