147 lines
3.9 KiB
C
147 lines
3.9 KiB
C
/*
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* This file is subject to the terms of the GFX License. If a copy of
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* the license was not distributed with this file, you can obtain one at:
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*
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* http://ugfx.org/license.html
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*/
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/**
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* @file src/gwin/label.c
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* @brief GWIN label widget header file.
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*
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* @defgroup Label Label
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* @ingroup GWIN
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*
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* @{
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*/
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#include "gfx.h"
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#if GFX_USE_GWIN && GWIN_NEED_LABEL
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#include "src/gwin/class_gwin.h"
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// macros to assist in data type conversions
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#define gh2obj ((GLabelObject *)gh)
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// flags for the GLabelObject
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#define GLABEL_FLG_WAUTO (GWIN_FIRST_CONTROL_FLAG << 0)
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#define GLABEL_FLG_HAUTO (GWIN_FIRST_CONTROL_FLAG << 1)
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#define GLABEL_FLG_BORDER (GWIN_FIRST_CONTROL_FLAG << 2)
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// simple: single line with no wrapping
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static coord_t getwidth(const char *text, font_t font, coord_t maxwidth) {
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(void) maxwidth;
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return gdispGetStringWidth(text, font)+2; // Allow one pixel of padding on each side
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}
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// simple: single line with no wrapping
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static coord_t getheight(const char *text, font_t font, coord_t maxwidth) {
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(void) text;
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(void) maxwidth;
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return gdispGetFontMetric(font, fontHeight);
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}
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static void gwinLabelDefaultDraw(GWidgetObject *gw, void *param) {
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coord_t w, h;
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(void) param;
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w = (gw->g.flags & GLABEL_FLG_WAUTO) ? getwidth(gw->text, gw->g.font, gdispGGetWidth(gw->g.display) - gw->g.x) : gw->g.width;
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h = (gw->g.flags & GLABEL_FLG_HAUTO) ? getheight(gw->text, gw->g.font, gdispGGetWidth(gw->g.display) - gw->g.x) : gw->g.height;
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if (gw->g.width != w || gw->g.height != h) {
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gwinResize(&gw->g, w, h);
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return;
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}
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// render the text
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gdispGFillStringBox(gw->g.display, gw->g.x, gw->g.y, gw->g.width, gw->g.height, gw->text, gw->g.font,
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(gw->g.flags & GWIN_FLG_ENABLED) ? gw->pstyle->enabled.text : gw->pstyle->disabled.text, gw->pstyle->background,
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justifyLeft);
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// render the border (if any)
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if (gw->g.flags & GLABEL_FLG_BORDER)
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gdispGDrawBox(gw->g.display, gw->g.x, gw->g.y, gw->g.width, gw->g.height, (gw->g.flags & GWIN_FLG_ENABLED) ? gw->pstyle->enabled.edge : gw->pstyle->disabled.edge);
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}
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static const gwidgetVMT labelVMT = {
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{
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"Label", // The class name
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sizeof(GLabelObject), // The object size
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_gwidgetDestroy, // The destroy routine
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_gwidgetRedraw, // The redraw routine
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0, // The after-clear routine
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},
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gwinLabelDefaultDraw, // default drawing routine
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#if GINPUT_NEED_MOUSE
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{
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0, // Process mose down events (NOT USED)
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0, // Process mouse up events (NOT USED)
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0, // Process mouse move events (NOT USED)
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},
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#endif
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#if GINPUT_NEED_TOGGLE
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{
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0, // No toggle role
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0, // Assign Toggles (NOT USED)
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0, // Get Toggles (NOT USED)
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0, // Process toggle off event (NOT USED)
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0, // Process toggle on event (NOT USED)
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},
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#endif
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#if GINPUT_NEED_DIAL
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{
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0, // No dial roles
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0, // Assign Dials (NOT USED)
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0, // Get Dials (NOT USED)
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0, // Procees dial move events (NOT USED)
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},
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#endif
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};
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GHandle gwinGLabelCreate(GDisplay *g, GLabelObject *widget, GWidgetInit *pInit) {
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uint16_t flags = 0;
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// auto assign width
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if (pInit->g.width <= 0) {
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flags |= GLABEL_FLG_WAUTO;
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pInit->g.width = getwidth(pInit->text, gwinGetDefaultFont(), gdispGGetWidth(g) - pInit->g.x);
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}
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// auto assign height
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if (pInit->g.height <= 0) {
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flags |= GLABEL_FLG_HAUTO;
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pInit->g.height = getheight(pInit->text, gwinGetDefaultFont(), gdispGGetWidth(g) - pInit->g.x);
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}
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if (!(widget = (GLabelObject *)_gwidgetCreate(g, &widget->w, pInit, &labelVMT)))
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return 0;
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// no borders by default
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flags &=~ GLABEL_FLG_BORDER;
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widget->w.g.flags |= flags;
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gwinSetVisible(&widget->w.g, pInit->g.show);
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return (GHandle)widget;
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}
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void gwinLabelSetBorder(GHandle gh, bool_t border) {
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// is it a valid handle?
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if (gh->vmt != (gwinVMT *)&labelVMT)
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return;
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if (border)
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gh2obj->w.g.flags |= GLABEL_FLG_BORDER;
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else
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gh2obj->w.g.flags &=~ GLABEL_FLG_BORDER;
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}
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#endif // GFX_USE_GWIN && GFX_NEED_LABEL
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/** @} */
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