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    Length: 3772 (0xebc)
    Types: TextFile
    Names: »PageButton.c«

└─⟦8648bda34⟧ Bits:30007244 EUUGD5_II: X11R5
    └─⟦87c3ac0e0⟧ »./contrib-3/contrib-3.00« 
        └─⟦de8ce1454⟧ 
            └─⟦this⟧ »contrib/lib/iv/src/bin/doc/PageButton.c« 

TextFile

/*
 * Copyright (c) 1991 Stanford University
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided
 * that the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of Stanford not be used in advertising or
 * publicity pertaining to distribution of the software without specific,
 * written prior permission.  Stanford makes no representations about
 * the suitability of this software for any purpose.  It is provided "as is"
 * without express or implied warranty.
 *
 * STANFORD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
 * IN NO EVENT SHALL STANFORD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * page button Telltale
 */

#include "PageButton.h"

#include <InterViews/background.h>
#include <InterViews/bitmap.h>
#include <InterViews/box.h>
#include <InterViews/canvas.h>
#include <InterViews/color.h>
#include <InterViews/center.h>
#include <InterViews/shapeof.h>
#include <InterViews/stencil.h>
#include <InterViews/target.h>
#include <InterViews/world.h>

#include "pagePlain.bm"
#include "pageHit.bm"
#include "pageChosen.bm"
#include "pageBoth.bm"

static void wash(Canvas* c, const Color* color, const Allocation& a) {
    c->fill_rect(a.left(), a.bottom(), a.right(), a.top(), color);
}

Color* PageButton::__fade;
Bitmap* PageButton::__plain;
Bitmap* PageButton::__hit;
Bitmap* PageButton::__chosen;
Bitmap* PageButton::__both;

PageButton::PageButton(Glyph* label, const Color* c) : Telltale(nil) {
    if (__fade == nil) {
	World* w = World::current();
	ColorIntensity r, g, b;
	w->background()->intensities(w->display(), r, g, b);
        __fade = new Color(r, g, b, 0.5);
        __fade->ref();
    }
    if (__plain == nil) {
        __plain = new Bitmap(
            pagePlain_bits, pagePlain_width, pagePlain_height,
            pagePlain_x_hot, pagePlain_y_hot
        );
        __plain->ref();
        __hit = new Bitmap(
            pageHit_bits, pageHit_width, pageHit_height,
            pageHit_x_hot, pageHit_y_hot
        );
        __hit->ref();
        __chosen = new Bitmap(
            pageChosen_bits, pageChosen_width, pageChosen_height,
            pageChosen_x_hot, pageChosen_y_hot
        );
        __chosen->ref();
        __both = new Bitmap(
            pageBoth_bits, pageBoth_width, pageBoth_height,
            pageBoth_x_hot, pageBoth_y_hot
        );
        __both->ref();
    }
    color_ = c;
    if (color_ != nil) {
	color_->ref();
    }
    body(
        new Target(
            new Overlay(
                new ShapeOf(new Stencil(__plain, color_)),
                new HCenter(label)
            ),
            TargetPrimitiveHit
        )
    );
}

PageButton::~PageButton() {
    Resource::unref(color_);
}

void PageButton::draw(Canvas* c, const Allocation& allocation) const {
    Telltale::draw(c, allocation);
    if (c != nil) {
        Coord x = allocation.x();
        Coord y = allocation.y();
	Bitmap* b = __plain;
        if (highlighted() && !chosen()) {
            b = __hit;
        } else if (!highlighted() && chosen()) {
            b = __chosen;
        } else if (highlighted() && chosen()) {
            b = __both;
        }
	c->stencil(b, color_, x, y);
        if (!enabled()) {
            wash(c, __fade, allocation);
        }
    }
}