自学教程：C++ DrawString函数代码示例

void ImportSampleDialog::DrawView() {    SetWindow(LIST_WIDTH,LIST_SIZE+3) ;    GUITextProperties props ;// Draw title//	char title[40] ;    SetColor(CD_NORMAL) ;//	sprintf(title,"Sample Import from %s",currentPath_.GetName()) ;//	w_.DrawString(title,pos,props) ;// Draw samples    int x=1 ;    int y=1 ;    if (currentSample_<topIndex_) {        topIndex_=currentSample_ ;    } ;    if (currentSample_>=topIndex_+LIST_SIZE) {        topIndex_=currentSample_ ;    } ;    IteratorPtr<Path> it(sampleList_.GetIterator()) ;    int count=0 ;    char buffer[256] ;    for(it->Begin(); !it->IsDone(); it->Next()) {        if ((count>=topIndex_)&&(count<topIndex_+LIST_SIZE)) {            Path &current=it->CurrentItem() ;            const std::string p=current.GetName() ;            if (count==currentSample_) {                SetColor(CD_HILITE2) ;                props.invert_=true ;            } else {                SetColor(CD_NORMAL) ;                props.invert_=false ;            }            if (!current.IsDirectory()) {                strcpy(buffer,p.c_str()) ;            } else {                buffer[0]='[' ;                strcpy(buffer+1,p.c_str()) ;                strcat(buffer,"]") ;            }            buffer[LIST_WIDTH-1]=0 ;            DrawString(x,y,buffer,props) ;            y+=1 ;        }        count++ ;    } ;    y=LIST_SIZE+2 ;    int offset=LIST_WIDTH/4 ;    SetColor(CD_NORMAL) ;    for (int i=0; i<3; i++) {        const char *text=buttonText[i] ;        x=offset*(i+1)-strlen(text)/2 ;        props.invert_=(i==selected_)?true:false ;        DrawString(x,y,text,props) ;    }} ;

void    plDynamicTextMsg::DrawString( int16_t x, int16_t y, const char *text ){    wchar_t *wString = hsStringToWString(text);    DrawString(x,y,wString);    delete [] wString;}

//.........这里部分代码省略.........		if (active)			flags |= BControlLook::B_FOCUSED;		be_control_look->DrawTextControlBorder(this, rect, updateRect, base,			flags);		rect = Bounds();		rect.right = fDivider - kLabelInputSpacing;//		rect.right = fText->Frame().left - 2;//		rect.right -= 3;//be_control_look->DefaultLabelSpacing();		be_control_look->DrawLabel(this, Label(), rect, updateRect,			base, flags, BAlignment(fLabelAlign, B_ALIGN_MIDDLE));		return;	}	// outer bevel	rgb_color noTint = ui_color(B_PANEL_BACKGROUND_COLOR);	rgb_color lighten1 = tint_color(noTint, B_LIGHTEN_1_TINT);	rgb_color lighten2 = tint_color(noTint, B_LIGHTEN_2_TINT);	rgb_color lightenMax = tint_color(noTint, B_LIGHTEN_MAX_TINT);	rgb_color darken1 = tint_color(noTint, B_DARKEN_1_TINT);	rgb_color darken2 = tint_color(noTint, B_DARKEN_2_TINT);	rgb_color darken4 = tint_color(noTint, B_DARKEN_4_TINT);	rgb_color navigationColor = ui_color(B_KEYBOARD_NAVIGATION_COLOR);	if (enabled)		SetHighColor(darken1);	else		SetHighColor(noTint);	StrokeLine(rect.LeftBottom(), rect.LeftTop());	StrokeLine(rect.RightTop());	if (enabled)		SetHighColor(lighten2);	else		SetHighColor(lighten1);	StrokeLine(BPoint(rect.left + 1.0f, rect.bottom), rect.RightBottom());	StrokeLine(BPoint(rect.right, rect.top + 1.0f), rect.RightBottom());	// inner bevel	rect.InsetBy(1.0f, 1.0f);	if (active) {		SetHighColor(navigationColor);		StrokeRect(rect);	} else {		if (enabled)			SetHighColor(darken4);		else			SetHighColor(darken2);		StrokeLine(rect.LeftTop(), rect.LeftBottom());		StrokeLine(rect.LeftTop(), rect.RightTop());		SetHighColor(noTint);		StrokeLine(BPoint(rect.left + 1.0f, rect.bottom), rect.RightBottom());		StrokeLine(BPoint(rect.right, rect.top + 1.0f));	}	// label	if (Label()) {		_ValidateLayoutData();		font_height& fontHeight = fLayoutData->font_info;		float y = Bounds().top + (Bounds().Height() + 1 - fontHeight.ascent			- fontHeight.descent) / 2 + fontHeight.ascent;		float x;		float labelWidth = StringWidth(Label());		switch (fLabelAlign) {			case B_ALIGN_RIGHT:				x = fDivider - labelWidth - kLabelInputSpacing;				break;			case B_ALIGN_CENTER:				x = fDivider - labelWidth / 2.0;				break;			default:				x = 0.0;				break;		}		BRect labelArea(x, Bounds().top, x + labelWidth, Bounds().bottom);		if (x < fDivider && updateRect.Intersects(labelArea)) {			labelArea.right = fText->Frame().left - kLabelInputSpacing;			BRegion clipRegion(labelArea);			ConstrainClippingRegion(&clipRegion);			SetHighColor(IsEnabled() ? ui_color(B_CONTROL_TEXT_COLOR)				: tint_color(noTint, B_DISABLED_LABEL_TINT));			DrawString(Label(), BPoint(x, y));		}	}}

void TextInput::Draw( Rect area ){   FillRect( Bounds(), 0x888888 );   DrawRect( Bounds(), 0x999999 );   DrawString( 2,2, m_text, 0 );}

/** * Draw the details for the given vehicle at the given position * * @param v     current vehicle * @param left  The left most coordinate to draw * @param right The right most coordinate to draw * @param y     The y coordinate * @param vscroll_pos Position of scrollbar * @param vscroll_cap Number of lines currently displayed * @param det_tab Selected details tab */void DrawTrainDetails(const Train *v, int left, int right, int y, int vscroll_pos, uint16 vscroll_cap, TrainDetailsWindowTabs det_tab){	/* get rid of awkward offset */	y -= WD_MATRIX_TOP;	int sprite_height = ScaleGUITrad(GetVehicleHeight(VEH_TRAIN));	int line_height = max(sprite_height, WD_MATRIX_TOP + FONT_HEIGHT_NORMAL + WD_MATRIX_BOTTOM);	int sprite_y_offset = line_height / 2;	int text_y_offset = (line_height - FONT_HEIGHT_NORMAL) / 2;	/* draw the first 3 details tabs */	if (det_tab != TDW_TAB_TOTALS) {		bool rtl = _current_text_dir == TD_RTL;		Direction dir = rtl ? DIR_E : DIR_W;		int x = rtl ? right : left;		for (; v != NULL && vscroll_pos > -vscroll_cap; v = v->GetNextVehicle()) {			GetCargoSummaryOfArticulatedVehicle(v, &_cargo_summary);			/* Draw sprites */			uint dx = 0;			int px = x;			const Train *u = v;			do {				Point offset;				int width = u->GetDisplayImageWidth(&offset);				if (vscroll_pos <= 0 && vscroll_pos > -vscroll_cap) {					int pitch = 0;					const Engine *e = Engine::Get(v->engine_type);					if (e->GetGRF() != NULL) {						pitch = ScaleGUITrad(e->GetGRF()->traininfo_vehicle_pitch);					}					PaletteID pal = (v->vehstatus & VS_CRASHED) ? PALETTE_CRASH : GetVehiclePalette(v);					VehicleSpriteSeq seq;					u->GetImage(dir, EIT_IN_DETAILS, &seq);					seq.Draw(px + (rtl ? -offset.x : offset.x), y - line_height * vscroll_pos + sprite_y_offset + pitch, pal, v->vehstatus & VS_CRASHED);				}				px += rtl ? -width : width;				dx += width;				u = u->Next();			} while (u != NULL && u->IsArticulatedPart());			bool separate_sprite_row = (dx > (uint)ScaleGUITrad(TRAIN_DETAILS_MAX_INDENT));			if (separate_sprite_row) {				vscroll_pos--;				dx = 0;			}			uint num_lines = max(1u, _cargo_summary.Length());			for (uint i = 0; i < num_lines; i++) {				int sprite_width = max<int>(dx, ScaleGUITrad(TRAIN_DETAILS_MIN_INDENT)) + 3;				int data_left  = left + (rtl ? 0 : sprite_width);				int data_right = right - (rtl ? sprite_width : 0);				if (vscroll_pos <= 0 && vscroll_pos > -vscroll_cap) {					int py = y - line_height * vscroll_pos + text_y_offset;					if (i > 0 || separate_sprite_row) {						if (vscroll_pos != 0) GfxFillRect(left, py - WD_MATRIX_TOP - 1, right, py - WD_MATRIX_TOP, _colour_gradient[COLOUR_GREY][5]);					}					switch (det_tab) {						case TDW_TAB_CARGO:							if (i < _cargo_summary.Length()) {								TrainDetailsCargoTab(&_cargo_summary[i], data_left, data_right, py);							} else {								DrawString(data_left, data_right, py, STR_QUANTITY_N_A, TC_LIGHT_BLUE);							}							break;						case TDW_TAB_INFO:							if (i == 0) TrainDetailsInfoTab(v, data_left, data_right, py);							break;						case TDW_TAB_CAPACITY:							if (i < _cargo_summary.Length()) {								TrainDetailsCapacityTab(&_cargo_summary[i], data_left, data_right, py);							} else {								SetDParam(0, STR_EMPTY);								DrawString(data_left, data_right, py, STR_VEHICLE_INFO_NO_CAPACITY);							}							break;						default: NOT_REACHED();					}				}				vscroll_pos--;			}		}	} else {		CargoArray act_cargo;		CargoArray max_cargo;		Money feeder_share = 0;//.........这里部分代码省略.........

int _jGetString(char *dest, char *start, int maxlen, GS_TYPE type){	/*	 * Returns 1 if OK; 0 if rejected or quit.	 */	int y;	event e;	int i;	int startx;   int key;   curpos = 0;	HideCursor();	startx = QueryX();	y = QueryY();	lrects = malloc(maxlen * sizeof(rect));	for (i = 0; i < maxlen; i++)	{		rect R;		R.Xmin = startx + i * StringWidthX;		R.Xmax = R.Xmin + StringWidthX - 1;		R.Ymax = y;		R.Ymin = R.Ymax - FontHeight + 1;		lrects[i] = R;	}	tbuf = malloc(maxlen + 1);	memset(tbuf, ' ', maxlen);	tbuf[maxlen] = 0;	i = 0;	if (start)	{		for (i = 0; i < maxlen && start[i]; i++)			tbuf[i] = start[i];	}	curpos = min(i, maxlen - 1);	TextAlign(alignLeft, alignBottom);	DrawString(tbuf);	/* Now highlight somebody */	InvertRect(&lrects[curpos]);	while (1)	{      key = 0;		KeyEvent(true, &e);      if (e.ASCII && e.ASCII != 0xe0)         key = e.ASCII;      else if (e.ScanCode != 0xff)         key = e.ScanCode << 8;      		if (key)		{			if (key == 0x0d || key == 0x1b)				break;			if (key == 0x08)	/* backspace */            backspace(maxlen);         else if (key == 0x15)      /* control U */         {            while(curpos)               backspace(maxlen);         }			else			{				int acceptable = 0;				if (type == GS_ANYTHING)					acceptable = isprint(key);				else if (type == GS_INTEGER)					acceptable = isdigit(key) || key == '-';				else if (type == GS_UNSIGNED)					acceptable = isdigit(key);				else if (type == GS_FLOAT)					acceptable = isdigit(key) || key == '.' || key == '-' || key == 'E' || key == 'e';				if (acceptable)				{					InvertRect(&lrects[curpos]);					MoveTo(lrects[curpos].Xmin, lrects[curpos].Ymax);					DrawChar(key);					tbuf[curpos] = key;					if (curpos < maxlen - 1)						curpos++;//.........这里部分代码省略.........

void SO_Display(){	// kolor t
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