ui/motif/graphics.c

   1 /*
   2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
   3  *
   4  * Copyright 2015 Olaf Wintermann. All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions are met:
   8  *
   9  *   1. Redistributions of source code must retain the above copyright
  10  *      notice, this list of conditions and the following disclaimer.
  11  *
  12  *   2. Redistributions in binary form must reproduce the above copyright
  13  *      notice, this list of conditions and the following disclaimer in the
  14  *      documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
  20  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  26  * POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <X11/Intrinsic.h>
  32 #include <X11/IntrinsicP.h>
  33
  34 #include "graphics.h"
  35
  36 #include "container.h"
  37
  38 static void ui_drawingarea_expose(Widget widget, XtPointer u, XtPointer c) {
  39     UiDrawEvent *drawevent = u;
  40     //XmDrawingAreaCallbackStruct *cbs = (XmDrawingAreaCallbackStruct *)c;
  41     //XEvent *event = cbs->event;
  42     Display *dpy = XtDisplay(widget);
  43
  44     UiEvent ev;
  45     ev.obj = drawevent->obj;
  46     ev.window = drawevent->obj->window;
  47     ev.document = drawevent->obj->ctx->document;
  48     ev.eventdata = NULL;
  49     ev.intval = 0;
  50
  51     XtVaGetValues(
  52             widget,
  53             XmNwidth,
  54             &drawevent->gr.g.width,
  55             XmNheight,
  56             &drawevent->gr.g.height,
  57             NULL);
  58
  59     XGCValues gcvals;
  60     gcvals.foreground = BlackPixelOfScreen(XtScreen(widget));
  61     drawevent->gr.gc = XCreateGC(dpy, XtWindow(widget), (GCForeground), &gcvals);
  62
  63     drawevent->callback(&ev, &drawevent->gr.g, drawevent->userdata);
  64 }
  65
  66 UIWIDGET ui_drawingarea(UiObject *obj, ui_drawfunc f, void *userdata) {
  67     UiContainer *ct = uic_get_current_container(obj);
  68
  69     int n = 0;
  70     Arg args[16];
  71
  72     Widget parent = ct->prepare(ct, args, &n, TRUE);
  73     Widget drawingarea = XmCreateDrawingArea(parent, "drawingarea", args, n);
  74
  75     if(f) {
  76         UiDrawEvent *event = malloc(sizeof(UiDrawEvent));
  77         event->obj = obj;
  78         event->callback = f;
  79         event->userdata = userdata;
  80
  81         event->gr.display = XtDisplay(drawingarea);
  82         event->gr.widget = drawingarea;
  83
  84         Colormap colormap;
  85         XtVaGetValues(drawingarea, XmNcolormap, &colormap, NULL);
  86         event->gr.colormap = colormap;
  87
  88         XtAddCallback(
  89                 drawingarea,
  90                 XmNexposeCallback,
  91                 ui_drawingarea_expose,
  92                 event);
  93
  94         XtVaSetValues(drawingarea, XmNuserData, event, NULL);
  95     }
  96
  97     XtManageChild(drawingarea);
  98     return drawingarea;
  99 }
 100
 101 static void ui_drawingarea_input(Widget widget, XtPointer u, XtPointer c) {
 102     XmDrawingAreaCallbackStruct *cbs = (XmDrawingAreaCallbackStruct*)c;
 103     XEvent *xevent = cbs->event;
 104     UiMouseEventData *event = u;
 105
 106     if (cbs->reason == XmCR_INPUT) {
 107         if (xevent->xany.type == ButtonPress) {
 108             UiMouseEvent me;
 109             me.x = xevent->xbutton.x;
 110             me.y = xevent->xbutton.y;
 111             // TODO: configurable double click time
 112             me.type = xevent->xbutton.time - event->last_event > 300 ? UI_PRESS : UI_PRESS2;
 113
 114             UiEvent e;
 115             e.obj = event->obj;
 116             e.window = event->obj->window;
 117             e.document = event->obj->ctx->document;
 118             e.eventdata = &me;
 119             e.intval = 0;
 120             event->callback(&e, event->userdata);
 121
 122
 123             event->last_event = me.type == UI_PRESS2 ? 0 : xevent->xbutton.time;
 124         }
 125     }
 126
 127 }
 128
 129 void ui_drawingarea_mousehandler(UiObject *obj, UIWIDGET widget, ui_callback f, void *u) {
 130     if(f) {
 131         UiMouseEventData *event = malloc(sizeof(UiMouseEventData));
 132         event->obj = obj;
 133         event->callback = f;
 134         event->userdata = u;
 135         event->last_event = 0;
 136
 137         XtAddCallback(widget, XmNinputCallback, ui_drawingarea_input, event);
 138     }
 139 }
 140
 141 void ui_drawingarea_getsize(UIWIDGET drawingarea, int *width, int *height) {
 142     XtVaGetValues(
 143             drawingarea,
 144             XmNwidth,
 145             width,
 146             XmNheight,
 147             height,
 148             NULL);
 149 }
 150
 151 void ui_drawingarea_redraw(UIWIDGET drawingarea) {
 152     //XClearArea(XtDisplay(drawingarea), drawingarea->core.window, 0, 0, drawingarea->core.width, drawingarea->core.height, True);
 153     UiDrawEvent *event;
 154     XtVaGetValues(drawingarea, XmNuserData, &event, NULL);
 155     ui_drawingarea_expose(drawingarea, event, NULL);
 156 }
 157
 158
 159 /* -------------------- text layout functions -------------------- */
 160 UiTextLayout* ui_text(UiGraphics *g) {
 161     UiTextLayout *text = malloc(sizeof(UiTextLayout));
 162     memset(text, 0, sizeof(UiTextLayout));
 163     text->text = NULL;
 164     text->length = 0;
 165     text->widget = ((UiXlibGraphics*)g)->widget;
 166     text->fontset = NULL;
 167     return text;
 168 }
 169
 170 static void create_default_fontset(UiTextLayout *layout) {
 171     char **missing = NULL;
 172     int num_missing = 0;
 173     char *def = NULL;
 174     Display *dpy = XtDisplay(layout->widget);
 175     XFontSet fs = XCreateFontSet(
 176         dpy,
 177         "-dt-interface system-medium-r-normal-s*utf*:,"
 178                 "-misc-liberation sans-medium-r-normal--0-0-0-0-p-0-iso8859-1,"
 179                 "-misc-liberation sans-medium-r-normal--0-0-0-0-p-0-iso8859-10,"
 180                 "-misc-liberation sans-medium-r-normal--0-0-0-0-p-0-iso8859-15,"
 181                 "-misc-liberation sans-medium-r-normal--0-0-0-0-p-0-iso8859-2,"
 182                 "-misc-liberation sans-medium-r-normal--0-0-0-0-p-0-iso8859-3,"
 183                 "-misc-liberation sans-medium-r-normal--0-0-0-0-p-0-iso8859-4,"
 184                 "-misc-liberation sans-medium-r-normal--0-0-0-0-p-0-iso8859-5,"
 185                 "-misc-liberation sans-medium-r-normal--0-0-0-0-p-0-iso8859-9,"
 186                 "-misc-liberation sans-medium-r-normal--0-0-0-0-p-0-koi8-e,"
 187                 "-misc-liberation sans-medium-r-normal--0-0-0-0-p-0-koi8-r,"
 188                 "-misc-liberation sans-medium-r-normal--0-0-0-0-p-0-koi8-ru,"
 189                 "-misc-liberation sans-medium-r-normal--0-0-0-0-p-0-koi8-u,"
 190                 "-misc-liberation sans-medium-r-normal--0-0-0-0-p-0-koi8-uni,"
 191                 "-misc-fixed-medium-r-normal--14-130-75-75-c-140-jisx0208",
 192         &missing, &num_missing, &def);
 193     layout->fontset = fs;
 194 }
 195
 196 void ui_text_free(UiTextLayout *text) {
 197     // TODO
 198 }
 199
 200 void ui_text_setstring(UiTextLayout *layout, char *str) {
 201     ui_text_setstringl(layout, str, strlen(str));
 202 }
 203
 204 void ui_text_setstringl(UiTextLayout *layout, char *str, int len) {
 205     layout->text = str;
 206     layout->length = len;
 207     layout->changed = 1;
 208 }
 209
 210 void ui_text_setfont(UiTextLayout *layout, char *font, int size) {
 211     create_default_fontset(layout);//TODO
 212     layout->changed = 1;
 213 }
 214
 215 void ui_text_getsize(UiTextLayout *layout, int *width, int *height) {
 216     if(layout->changed) {
 217         XRectangle ext, lext;
 218         XmbTextExtents(layout->fontset, layout->text, layout->length, &ext, &lext);
 219         layout->width = ext.width;
 220         layout->height = ext.height;
 221         layout->changed = 0;
 222     }
 223     *width = layout->width;
 224     *height = layout->height;
 225 }
 226
 227 void ui_text_setwidth(UiTextLayout *layout, int width) {
 228     layout->maxwidth = width;
 229 }
 230
 231
 232 /* -------------------- drawing functions -------------------- */
 233
 234 void ui_graphics_color(UiGraphics *g, int red, int green, int blue) {
 235     UiXlibGraphics *gr = (UiXlibGraphics*)g;
 236     XColor color;
 237     color.flags= DoRed | DoGreen | DoBlue;
 238     color.red = red * 257;
 239     color.green = green * 257;
 240     color.blue = blue * 257;
 241     XAllocColor(gr->display, gr->colormap, &color);
 242     XSetForeground(gr->display, gr->gc, color.pixel);
 243 }
 244
 245 void ui_draw_line(UiGraphics *g, int x1, int y1, int x2, int y2) {
 246     UiXlibGraphics *gr = (UiXlibGraphics*)g;
 247     XDrawLine(gr->display, XtWindow(gr->widget), gr->gc, x1, y1, x2, y2);
 248 }
 249
 250 void ui_draw_rect(UiGraphics *g, int x, int y, int w, int h, int fill) {
 251     UiXlibGraphics *gr = (UiXlibGraphics*)g;
 252     if(fill) {
 253         XFillRectangle(gr->display, XtWindow(gr->widget), gr->gc, x, y, w, h);
 254     } else {
 255         XDrawRectangle(gr->display, XtWindow(gr->widget), gr->gc, x, y, w, h);
 256     }
 257 }
 258
 259 void ui_draw_text(UiGraphics *g, int x, int y, UiTextLayout *text) {
 260     UiXlibGraphics *gr = (UiXlibGraphics*)g;
 261     int width, height;
 262     ui_text_getsize(text, &width, &height);
 263     if(text->maxwidth > 0) {
 264         XRectangle clip;
 265         clip.x = x;
 266         clip.y = y;
 267         clip.width = text->maxwidth;
 268         clip.height = height;
 269         XSetClipRectangles(gr->display, gr->gc, 0, 0, &clip, 1, Unsorted);
 270     }
 271
 272     XmbDrawString(
 273             gr->display,
 274             XtWindow(gr->widget),
 275             text->fontset,
 276             gr->gc,
 277             x,
 278             y + height,
 279             text->text,
 280             text->length);
 281
 282     XSetClipMask(gr->display, gr->gc, None);
 283 }