ui/motif/label.c

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2024 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

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

#include "label.h"
#include "container.h"
#include "../common/context.h"
#include "../common/object.h"

#include "Grid.h"

static UIWIDGET label_create(UiObject *obj, UiLabelArgs args, int align) {
    Arg xargs[16];
    int n = 0;
    
    UiContainerPrivate *ctn = ui_obj_container(obj);
    UI_APPLY_LAYOUT(ctn->layout, args);
    
    Widget parent = ctn->prepare(ctn, xargs, &n);
    
    XtSetArg(xargs[n], XmNalignment, align); n++;
    XmString label = NULL;
    if(args.label) {
        label = XmStringCreateLocalized((char*)args.label);
        XtSetArg(xargs[n], XmNlabelString, label); n++;
    }
    
    char *name = args.name ? (char*)args.name : "label";
    Widget w = XmCreateLabel(parent, name, xargs, n);
    XtManageChild(w);
    ctn->add(ctn, w);
    
    XmStringFree(label);
    return w;
} 

UIWIDGET ui_label_create(UiObject* obj, UiLabelArgs args) {
    return label_create(obj, args, XmALIGNMENT_CENTER);
}

UIWIDGET ui_llabel_create(UiObject* obj, UiLabelArgs args) {
    return label_create(obj, args, XmALIGNMENT_BEGINNING);
}

UIWIDGET ui_rlabel_create(UiObject* obj, UiLabelArgs args) {
    return label_create(obj, args, XmALIGNMENT_END);
}


/* ------------------------------ progressbar ------------------------------ */

static void ui_destroy_progressbar(Widget w, UiProgressBar *pb, XtPointer d) {
    // TODO: free other stuff
    free(pb);
}

static void ui_progressbar_expose(Widget widget, UiProgressBar *pb, XtPointer c) {
    Display *dp = XtDisplay(widget);
    Window w = XtWindow(widget);
    if(!pb->gc) {
        XGCValues gcvals;
        gcvals.foreground = pb->color;
        pb->gc = XCreateGC(dp, w, (GCForeground), &gcvals);
    }
    
    Dimension width = widget->core.width;
    Dimension height = widget->core.height;
    
    double value = (pb->value - pb->min) / (pb->max - pb->min);
    Dimension valueW = (double)width * value;
    
    XClearArea(dp, w, 0, 0, width, height, False);
    XFillRectangle(dp, w, pb->gc, 0, 0, valueW, widget->core.height);
}

UIWIDGET ui_progressbar_create(UiObject *obj, UiProgressbarArgs args) {
    Arg xargs[16];
    int n = 0;
    
    UiContainerPrivate *ctn = ui_obj_container(obj);
    UI_APPLY_LAYOUT(ctn->layout, args);
    
    Widget parent = ctn->prepare(ctn, xargs, &n);
    
    char *name = args.name ? (char*)args.name : "progressbar";
    Widget frame = XmCreateFrame(parent, name, xargs, n);
    
    // create a button and get some informations about the height, shadow, highlight, ....
    // we want the frame to have the same dimensions as a normal button
    Widget test = XmCreatePushButton(frame, "button", NULL, 0);
    XtManageChild(test);
    Dimension h, highlightThickness, shadowThickness;
    Pixel highlightColor;
    XtVaGetValues(test, XmNheight, &h, XmNhighlightThickness, &highlightThickness,
            XmNshadowThickness, &shadowThickness, XmNhighlightColor, &highlightColor, NULL);
    XtDestroyWidget(test);
    
    // adjust frame
    XtVaSetValues(frame, XmNshadowThickness, shadowThickness, gridMarginLeft, highlightThickness,
            gridMarginRight, highlightThickness, gridMarginTop, highlightThickness,
            gridMarginBottom, highlightThickness, NULL);
    
    // create drawing area
    Dimension da_height = h - 2*highlightThickness - 2*shadowThickness;
    n = 0;
    XtSetArg(xargs[n], XmNheight, da_height); n++;
    Widget drawingArea = XmCreateDrawingArea(frame, "progressbar_drawingarea", xargs, n);
    XtManageChild(drawingArea);
    
    UiVar* var = uic_widget_var(obj->ctx, obj->ctx, args.value, args.varname, UI_VAR_DOUBLE);
    
    UiProgressBar *progressbarData = malloc(sizeof(UiProgressBar));
    progressbarData->widget = drawingArea;
    progressbarData->min = args.min;
    progressbarData->max = args.max == 0 ? 100 : args.max;
    progressbarData->value = 50;
    progressbarData->var = var;
    progressbarData->color = highlightColor;
    progressbarData->gc = NULL; // initialize on first expose
    
    if(var) {
        UiDouble *d = var->value;
        progressbarData->value = d->value;
        d->obj = progressbarData;
        d->get = ui_progressbar_get;
        d->set = ui_progressbar_set;
    }
    
    XtAddCallback(
            drawingArea,
            XmNexposeCallback,
            (XtCallbackProc)ui_progressbar_expose,
            progressbarData);
    
    
    XtManageChild(frame);
    return frame;
}

double ui_progressbar_get(UiDouble *d) {
    UiProgressBar *pb = d->obj;
    d->value = pb->value;
    return d->value;
}

void ui_progressbar_set(UiDouble *d, double value) {
    UiProgressBar *pb = d->obj;
    d->value = value;
    pb->value = value;
    ui_progressbar_expose(pb->widget, pb, NULL);
}