101 lines
3.3 KiB
C
101 lines
3.3 KiB
C
// widgetLabel.c -- Label widget
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//
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// Static text display -- the simplest widget. Not focusable, not interactive.
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// Supports accelerator keys via '&' prefix: when the user presses Alt+key,
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// focus moves to the next focusable widget after this label. This follows
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// the Win3.1 convention where labels act as keyboard shortcuts for adjacent
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// controls (e.g., a label "&Name:" before a text input).
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//
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// The text pointer is stored directly (not copied) -- the caller must ensure
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// the string remains valid for the widget's lifetime, or use widgetLabelSetText
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// to update it. This avoids unnecessary allocations for the common case of
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// literal string labels.
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//
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// Background is transparent by default (bgColor == 0 means use the parent's
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// content background color from the color scheme). The +1 in calcMinH adds a
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// pixel of breathing room below the text baseline.
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#include "widgetInternal.h"
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// ============================================================
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// wgtLabel
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// ============================================================
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WidgetT *wgtLabel(WidgetT *parent, const char *text) {
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WidgetT *w = widgetAlloc(parent, WidgetLabelE);
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if (w) {
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w->as.label.text = text;
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w->accelKey = accelParse(text);
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}
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return w;
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}
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// ============================================================
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// widgetLabelGetText
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// ============================================================
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const char *widgetLabelGetText(const WidgetT *w) {
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return w->as.label.text;
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}
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// ============================================================
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// widgetLabelSetText
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// ============================================================
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void widgetLabelSetText(WidgetT *w, const char *text) {
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w->as.label.text = text;
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w->accelKey = accelParse(text);
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}
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// ============================================================
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// widgetLabelCalcMinSize
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// ============================================================
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void widgetLabelCalcMinSize(WidgetT *w, const BitmapFontT *font) {
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w->calcMinW = textWidthAccel(font, w->as.label.text);
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w->calcMinH = font->charHeight + 1;
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}
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// ============================================================
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// widgetLabelPaint
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// ============================================================
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void widgetLabelPaint(WidgetT *w, DisplayT *d, const BlitOpsT *ops, const BitmapFontT *font, const ColorSchemeT *colors) {
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int32_t textW = textWidthAccel(font, w->as.label.text);
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int32_t textX = w->x;
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int32_t textY = w->y + (w->h - font->charHeight) / 2;
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if (w->as.label.textAlign == AlignCenterE) {
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textX = w->x + (w->w - textW) / 2;
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} else if (w->as.label.textAlign == AlignEndE) {
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textX = w->x + w->w - textW;
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}
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if (!w->enabled) {
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drawTextAccelEmbossed(d, ops, font, textX, textY, w->as.label.text, colors);
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return;
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}
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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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drawTextAccel(d, ops, font, textX, textY, w->as.label.text, fg, bg, false);
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}
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// ============================================================
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// wgtLabelSetAlign
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// ============================================================
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void wgtLabelSetAlign(WidgetT *w, WidgetAlignE align) {
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if (w && w->type == WidgetLabelE) {
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w->as.label.textAlign = align;
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}
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}
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