haiku-beta6/src/kits/interface/StringView.cpp

/*
 * Copyright 2001-2005, Haiku Inc.
 * Distributed under the terms of the MIT License.
 *
 * Authors:
 *		Frans van Nispen ([email protected])
 */

/**	BStringView draw a non-editable text string */


#include <StringView.h>

#include <LayoutUtils.h>
#include <Message.h>
#include <View.h>
#include <Window.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>


BStringView::BStringView(BRect frame, const char* name, const char* text,
		uint32 resizeMask, uint32 flags)
	: BView(frame, name, resizeMask, flags)
{
	fText = text ? strdup(text) : NULL;
	fAlign = B_ALIGN_LEFT;
}


BStringView::BStringView(BMessage* data)
	: BView(data),
	fText(NULL)
{
	int32 align;
	if (data->FindInt32("_align", &align) == B_OK)
		fAlign = (alignment)align;
	else
		fAlign = B_ALIGN_LEFT;

	const char* text;
	if (data->FindString("_text", &text) != B_OK)
		text = NULL;

	SetText(text);
}


BArchivable*
BStringView::Instantiate(BMessage* data)
{
	if (!validate_instantiation(data, "BStringView"))
		return NULL;

	return new BStringView(data);
}


status_t
BStringView::Archive(BMessage* data, bool deep) const
{
	status_t err = BView::Archive(data, deep);

	if (err == B_OK && fText)
		err = data->AddString("_text", fText);

	if (err == B_OK)
		err = data->AddInt32("_align", fAlign);

	return err;
}


BStringView::~BStringView()
{
	free(fText);
}


void
BStringView::SetText(const char* text)
{
	free(fText);
	fText = text ? strdup(text) : NULL;
	Invalidate();
}


const char*
BStringView::Text() const
{
	return fText;
}


void
BStringView::SetAlignment(alignment flag)
{
	fAlign = flag;
	Invalidate();
}


alignment
BStringView::Alignment() const
{
	return fAlign;
}


void
BStringView::AttachedToWindow()
{
	if (Parent())
		SetViewColor(Parent()->ViewColor());
}


void
BStringView::Draw(BRect bounds)
{
	if (!fText)
		return;

	SetLowColor(ViewColor());

	font_height fontHeight;
	GetFontHeight(&fontHeight);

	float y = Bounds().bottom - ceil(fontHeight.descent);
	float x;
	switch (fAlign) {
		case B_ALIGN_RIGHT:
			x = Bounds().Width() - StringWidth(fText) - 2.0f;
			break;

		case B_ALIGN_CENTER:
			x = (Bounds().Width() - StringWidth(fText)) / 2.0f;
			break;

		default:
			x = 2.0f;
			break;
	}

	DrawString(fText, BPoint(x, y));
}


void
BStringView::ResizeToPreferred()
{
	float width, height;
	GetPreferredSize(&width, &height);

	// Resize the width only for B_ALIGN_LEFT (if its large enough already, that is)
	if (Bounds().Width() > width && Alignment() != B_ALIGN_LEFT)
		width = Bounds().Width();

	BView::ResizeTo(width, height);
}


void
BStringView::GetPreferredSize(float* _width, float* _height)
{
	if (!fText) {
		BView::GetPreferredSize(_width, _height);
		return;
	}

	if (_width)
		*_width = 4.0f + ceil(StringWidth(fText));

	if (_height) {
		font_height fontHeight;
		GetFontHeight(&fontHeight);
		*_height = ceil(fontHeight.ascent + fontHeight.descent + fontHeight.leading) + 2.0f;
	}
}


void
BStringView::MessageReceived(BMessage* message)
{
	BView::MessageReceived(message);
}


void
BStringView::MouseDown(BPoint point)
{
	BView::MouseDown(point);
}


void
BStringView::MouseUp(BPoint point)
{
	BView::MouseUp(point);
}


void
BStringView::MouseMoved(BPoint point, uint32 transit, const BMessage* msg)
{
	BView::MouseMoved(point, transit, msg);
}


void
BStringView::DetachedFromWindow()
{
	BView::DetachedFromWindow();
}


void
BStringView::FrameMoved(BPoint newPosition)
{
	BView::FrameMoved(newPosition);
}


void
BStringView::FrameResized(float newWidth, float newHeight)
{
	BView::FrameResized(newWidth, newHeight);
}


BHandler*
BStringView::ResolveSpecifier(BMessage* msg, int32 index,
	BMessage* specifier, int32 form, const char* property)
{
	return NULL;
}


void
BStringView::MakeFocus(bool state)
{
	BView::MakeFocus(state);
}


void
BStringView::AllAttached()
{
	BView::AllAttached();
}


void
BStringView::AllDetached()
{
	BView::AllDetached();
}


status_t
BStringView::GetSupportedSuites(BMessage* message)
{
	return BView::GetSupportedSuites(message);
}


BSize
BStringView::MaxSize()
{
	float width, height;
	GetPreferredSize(&width, &height);

	return BLayoutUtils::ComposeSize(ExplicitMaxSize(), BSize(width, height));
}


status_t
BStringView::Perform(perform_code d, void* arg)
{
	return B_ERROR;
}


void BStringView::_ReservedStringView1() {}
void BStringView::_ReservedStringView2() {}
void BStringView::_ReservedStringView3() {}


BStringView&
BStringView::operator=(const BStringView&)
{
	// Assignment not allowed (private)
	return *this;
}