/*
* WINGs WMRuler: nifty ruler widget for WINGs :-)
*
* Copyright (c) 1999-2000 Nwanua Elumeze
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "WINGsP.h"
#include "wconfig.h"
#define MIN_DOC_WIDTH 10
typedef struct W_Ruler {
W_Class widgetClass;
W_View *view;
W_View *pview; /* the parent's view (for drawing the line) */
WMAction *moveAction; /* what to when while moving */
WMAction *releaseAction; /* what to do when released */
void *clientData;
WMColor *fg;
GC fgGC, bgGC;
WMFont *font;
WMRulerMargins margins;
int offset;
int motion; /* the position of the _moving_ marker(s) */
int end; /* the last tick on the baseline (restrict markers to it) */
Pixmap drawBuffer;
struct {
unsigned int whichMarker:3;
/* 0, 1, 2, 3, 4, 5, 6 */
/* none, left, right, first, body, tabstop, first & body */
unsigned int buttonPressed:1;
unsigned int redraw:1;
unsigned int RESERVED:27;
} flags;
} Ruler;
/* Marker for left margin
|\
| \
|__\
|
|
*/
static void
drawLeftMarker(Ruler * rPtr)
{
XPoint points[4];
int xpos = (rPtr->flags.whichMarker==1 ? rPtr->motion : rPtr->margins.left);
XDrawLine(rPtr->view->screen->display, rPtr->drawBuffer, rPtr->fgGC,
xpos, 8, xpos, 22);
points[0].x = xpos;
points[0].y = 1;
points[1].x = points[0].x + 6;
points[1].y = 8;
points[2].x = points[0].x + 6;
points[2].y = 9;
points[3].x = points[0].x;
points[3].y = 9;
XFillPolygon(rPtr->view->screen->display, rPtr->drawBuffer, rPtr->fgGC,
points, 4, Convex, CoordModeOrigin);
}
/* Marker for right margin
/|
/ |
/__|
|
|
*/
static void
drawRightMarker(Ruler * rPtr)
{
XPoint points[4];
int xpos = (rPtr->flags.whichMarker==2 ? rPtr->motion : rPtr->margins.right);
XDrawLine(rPtr->view->screen->display, rPtr->drawBuffer, rPtr->fgGC,
xpos, 8, xpos, 22);
points[0].x = xpos + 1;
points[0].y = 0;
points[1].x = points[0].x - 6;
points[1].y = 7;
points[2].x = points[0].x - 6;
points[2].y = 9;
points[3].x = points[0].x;
points[3].y = 9;
XFillPolygon(rPtr->view->screen->display, rPtr->drawBuffer, rPtr->fgGC,
points, 4, Convex, CoordModeOrigin);
}
/* Marker for first line only
_____
|___|
|
*/
static void
drawFirstMarker(Ruler * rPtr)
{
int xpos = ((rPtr->flags.whichMarker == 3 || rPtr->flags.whichMarker == 6) ?
rPtr->motion : rPtr->margins.first);
XFillRectangle(rPtr->view->screen->display, rPtr->drawBuffer, rPtr->fgGC,
xpos - 5, 10, 11, 5);
XDrawLine(rPtr->view->screen->display, rPtr->drawBuffer, rPtr->fgGC,
xpos, 12, xpos, 22);
}
/* Marker for rest of body
_____
\ /
\./
*/
static void
drawBodyMarker(Ruler * rPtr)
{
XPoint points[4];
int xpos = ((rPtr->flags.whichMarker == 4 || rPtr->flags.whichMarker == 6) ?
rPtr->motion : rPtr->margins.body);
points[0].x = xpos - 5;
points[0].y = 16;
points[1].x = points[0].x + 11;
points[1].y = 16;
points[2].x = points[0].x + 5;
points[2].y = 22;
XFillPolygon(rPtr->view->screen->display, rPtr->drawBuffer, rPtr->fgGC,
points, 3, Convex, CoordModeOrigin);
}
static void
createDrawBuffer(Ruler * rPtr)
{
if(!rPtr->view->flags.realized)
return;
if (rPtr->drawBuffer)
XFreePixmap(rPtr->view->screen->display, rPtr->drawBuffer);
rPtr->drawBuffer = XCreatePixmap(rPtr->view->screen->display,
rPtr->view->window, rPtr->view->size.width, 40,
rPtr->view->screen->depth);
XFillRectangle(rPtr->view->screen->display, rPtr->drawBuffer,
rPtr->bgGC, 0, 0, rPtr->view->size.width, 40);
}
static void
drawRulerOnPixmap(Ruler * rPtr)
{
int i, j, w, m;
char c[3];
int marks[9] = {11, 3, 5, 3, 7, 3, 5, 3};
if (!rPtr->drawBuffer || !rPtr->view->flags.realized)
return;
XFillRectangle(rPtr->view->screen->display, rPtr->drawBuffer,
rPtr->bgGC, 0, 0, rPtr->view->size.width, 40);
WMDrawString(rPtr->view->screen, rPtr->drawBuffer, rPtr->fg,
rPtr->font, rPtr->margins.left + 2, 26, _("0 inches"), 10);
/* marker ticks */
i = j = m = 0;
w = rPtr->view->size.width - rPtr->margins.left;
while (m < w) {
XDrawLine(rPtr->view->screen->display, rPtr->drawBuffer,
rPtr->fgGC, rPtr->margins.left + m, 23,
rPtr->margins.left + m, marks[i % 8] + 23);
if (i != 0 && i % 8 == 0) {
if (j < 10)
snprintf(c, 3, "%d", ++j);
else
snprintf(c, 3, "%2d", ++j);
WMDrawString(rPtr->view->screen, rPtr->drawBuffer, rPtr->fg,
rPtr->font, rPtr->margins.left + 2 + m, 26, c, 2);
}
m = (++i) * 10;
}
rPtr->end = rPtr->margins.left + m - 10;
if (rPtr->margins.right > rPtr->end)
rPtr->margins.right = rPtr->end;
/* base line */
XDrawLine(rPtr->view->screen->display, rPtr->drawBuffer, rPtr->fgGC,
rPtr->margins.left, 22, rPtr->margins.left + m - 10, 22);
drawLeftMarker(rPtr);
drawRightMarker(rPtr);
drawFirstMarker(rPtr);
drawBodyMarker(rPtr);
rPtr->flags.redraw = False;
}
static void
paintRuler(Ruler * rPtr)
{
if (!rPtr->drawBuffer || !rPtr->view->flags.realized)
return;
if (rPtr->flags.redraw)
drawRulerOnPixmap(rPtr);
XCopyArea(rPtr->view->screen->display, rPtr->drawBuffer,
rPtr->view->window, rPtr->bgGC, 0, 0,
rPtr->view->size.width, 40, 0, 0);
}
static Bool
verifyMarkerMove(Ruler * rPtr, int x)
{
if (rPtr->flags.whichMarker < 1 || rPtr->flags.whichMarker > 6)
return False;
switch (rPtr->flags.whichMarker) {
case 1:
if (x > rPtr->margins.right - 10 || x < rPtr->offset ||
rPtr->margins.body + x > rPtr->margins.right - MIN_DOC_WIDTH ||
rPtr->margins.first + x > rPtr->margins.right - MIN_DOC_WIDTH)
return False;
break;
case 2:
if (x < rPtr->margins.first + MIN_DOC_WIDTH ||
x < rPtr->margins.body + MIN_DOC_WIDTH ||
x < rPtr->margins.left + MIN_DOC_WIDTH ||
x > rPtr->end) /*rPtr->view->size.width) */
return False;
break;
case 3:
if (x >= rPtr->margins.right - MIN_DOC_WIDTH || x < rPtr->margins.left)
return False;
break;
case 4:
if (x >= rPtr->margins.right - MIN_DOC_WIDTH || x < rPtr->margins.left)
return False;
break;
case 6:
if (x >= rPtr->margins.right - MIN_DOC_WIDTH || x < rPtr->margins.left)
return False;
break;
default:
return False;
}
rPtr->motion = x;
return True;
}
static int
whichMarker(Ruler * rPtr, int x, int y)
{
if (x < rPtr->offset || y > 22)
return 0;
if (rPtr->margins.left - x >= -6 && y <= 9
&& (rPtr->margins.left - x <= 0) && y >= 4) {
rPtr->motion = rPtr->margins.left;
return 1;
}
if (rPtr->margins.right - x >= -1 && y <= 11
&& rPtr->margins.right - x <= 5 && y >= 4) {
rPtr->motion = rPtr->margins.right;
return 2;
}
#if 0
/* both first and body? */
if (rPtr->margins.first - x <= 4 && rPtr->margins.first - x >= -5
&& rPtr->margins.body - x <= 4 && rPtr->margins.body - x >= -5
&& y >= 15 && y <= 17) {
rPtr->motion = rPtr->margins.first;
return 6;
}
#endif
if (rPtr->margins.first - x <= 4 && y <= 15
&& rPtr->margins.first - x >= -5 && y >= 10) {
rPtr->motion = rPtr->margins.first;
return 3;
}
if (rPtr->margins.body - x <= 4 && y <= 21 &&
rPtr->margins.body - x >= -5 && y >= 17) {
rPtr->motion = rPtr->margins.body;
return 4;
}
/* do tabs (5) */
return 0;
}
static void
rulerDidResize(W_ViewDelegate * self, WMView * view)
{
Ruler *rPtr = (Ruler *) view->self;
createDrawBuffer(rPtr);
rPtr->flags.redraw = True;
paintRuler(rPtr);
}
static void
handleEvents(XEvent * event, void *data)
{
Ruler *rPtr = (Ruler *) data;
switch (event->type) {
case Expose:
rulerDidResize(rPtr->view->delegate, rPtr->view);
break;
case MotionNotify:
if (rPtr->flags.buttonPressed
&& (event->xmotion.state & Button1Mask)) {
if (verifyMarkerMove(rPtr, event->xmotion.x)) {
GC gc = WMColorGC(WMDarkGrayColor(rPtr->view->screen));
if (rPtr->moveAction)
(rPtr->moveAction) (rPtr, rPtr->clientData);
rPtr->flags.redraw = True;
paintRuler(rPtr);
XSetLineAttributes(rPtr->view->screen->display, gc, 1,
LineSolid, CapNotLast, JoinMiter);
XDrawLine(rPtr->pview->screen->display,
rPtr->pview->window,
gc, rPtr->motion + 1, 40,
rPtr->motion + 1, rPtr->pview->size.height - 5);
}
}
break;
case ButtonPress:
if (event->xbutton.button != Button1)
return;
rPtr->flags.buttonPressed = True;
rPtr->flags.whichMarker =
whichMarker(rPtr, event->xmotion.x,
event->xmotion.y);
break;
case ButtonRelease:
if (event->xbutton.button != Button1)
return;
rPtr->flags.buttonPressed = False;
switch (rPtr->flags.whichMarker) {
case 1:{
int change = rPtr->margins.left - rPtr->motion;
rPtr->margins.first -= change;
rPtr->margins.body -= change;
rPtr->margins.left = rPtr->motion;
rPtr->flags.redraw = True;
paintRuler(rPtr);
break;
}
case 2:
rPtr->margins.right = rPtr->motion;
break;
case 3:
rPtr->margins.first = rPtr->motion;
break;
case 4:
rPtr->margins.body = rPtr->motion;
break;
case 6:
rPtr->margins.first = rPtr->margins.body
= rPtr->motion;
break;
}
if (rPtr->releaseAction)
(rPtr->releaseAction) (rPtr, rPtr->clientData);
break;
}
}
W_ViewDelegate _RulerViewDelegate =
{
NULL,
NULL,
rulerDidResize,
NULL,
NULL
};
WMRuler *
WMCreateRuler(WMWidget * parent)
{
Ruler *rPtr = wmalloc(sizeof(Ruler));
unsigned int w = WMWidgetWidth(parent);
memset(rPtr, 0, sizeof(Ruler));
rPtr->widgetClass = WC_Ruler;
rPtr->view = W_CreateView(W_VIEW(parent));
if (!rPtr->view) {
wfree(rPtr);
return NULL;
}
rPtr->view->self = rPtr;
rPtr->drawBuffer = (Pixmap) NULL;
W_ResizeView(rPtr->view, w, 40);
WMCreateEventHandler(rPtr->view, ExposureMask | StructureNotifyMask
| EnterWindowMask | LeaveWindowMask | FocusChangeMask
| ButtonReleaseMask | ButtonPressMask | KeyReleaseMask
| KeyPressMask | Button1MotionMask, handleEvents, rPtr);
rPtr->view->delegate = &_RulerViewDelegate;
rPtr->fg = WMBlackColor(rPtr->view->screen);
rPtr->fgGC = WMColorGC(rPtr->fg);
rPtr->bgGC = WMColorGC(WMGrayColor(rPtr->view->screen));
rPtr->font = WMSystemFontOfSize(rPtr->view->screen, 8);
rPtr->offset = 22;
rPtr->margins.left = 22;
rPtr->margins.body = 22;
rPtr->margins.first = 42;
rPtr->margins.right = (w < 502 ? w : 502);
rPtr->margins.tabs = NULL;
rPtr->flags.whichMarker = 0; /* none */
rPtr->flags.buttonPressed = False;
rPtr->flags.redraw = True;
rPtr->moveAction = NULL;
rPtr->releaseAction = NULL;
rPtr->pview = W_VIEW(parent);
return rPtr;
}
void
WMSetRulerMargins(WMRuler * rPtr, WMRulerMargins margins)
{
if (!rPtr)
return;
rPtr->margins.left = margins.left + rPtr->offset;
rPtr->margins.right = margins.right + rPtr->offset;
rPtr->margins.first = margins.first + rPtr->offset;
rPtr->margins.body = margins.body + rPtr->offset;
rPtr->margins.tabs = margins.tabs; /*for loop */
rPtr->flags.redraw = True;
paintRuler(rPtr);
}
WMRulerMargins *
WMGetRulerMargins(WMRuler * rPtr)
{
WMRulerMargins *margins = wmalloc(sizeof(WMRulerMargins));
if (!rPtr) {
margins->first = margins->body = margins->left = 0;
margins->right = 100;
return margins;
}
margins->left = rPtr->margins.left - rPtr->offset;
margins->right = rPtr->margins.right - rPtr->offset;
margins->first = rPtr->margins.first - rPtr->offset;
margins->body = rPtr->margins.body - rPtr->offset;
/*for */
margins->tabs = rPtr->margins.tabs;
return margins;
}
Bool
WMIsMarginEqualToMargin(WMRulerMargins *aMargin, WMRulerMargins *anotherMargin)
{
if(aMargin == anotherMargin)
return True;
else if(!aMargin || !anotherMargin)
return False;
if(aMargin->left != anotherMargin->left)
return False;
if(aMargin->first != anotherMargin->first)
return False;
if(aMargin->body != anotherMargin->body)
return False;
if(aMargin->right != anotherMargin->right)
return False;
return True;
}
void
WMSetRulerOffset(WMRuler * rPtr, int pixels)
{
if (!rPtr || pixels < 0 || pixels + MIN_DOC_WIDTH >= rPtr->view->size.width)
return;
rPtr->offset = pixels;
/*rulerDidResize(rPtr, rPtr->view); */
}
int
WMGetRulerOffset(WMRuler * rPtr)
{
if (!rPtr)
return 0; /* what value should return if no ruler? -1 or 0? */
return rPtr->offset;
}
void
WMSetRulerReleaseAction(WMRuler * rPtr, WMAction * action, void *clientData)
{
if (!rPtr)
return;
rPtr->releaseAction = action;
rPtr->clientData = clientData;
}
void
WMSetRulerMoveAction(WMRuler * rPtr, WMAction * action, void *clientData)
{
if (!rPtr)
return;
rPtr->moveAction = action;
rPtr->clientData = clientData;
}
/* _which_ one was released */
int
WMGetReleasedRulerMargin(WMRuler * rPtr)
{
if (!rPtr)
return 0;
return rPtr->flags.whichMarker;
}
/* _which_ one is being grabbed */
int
WMGetGrabbedRulerMargin(WMRuler * rPtr)
{
if (!rPtr)
return 0;
return rPtr->flags.whichMarker;
}
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