int TkpScaleElement( TkScale *scalePtr, /* Widget record for scale. */ int x, int y) /* Coordinates within scalePtr's window. */ { int sliderFirst; if (scalePtr->orient == ORIENT_VERTICAL) { if ((x < scalePtr->vertTroughX) || (x >= (scalePtr->vertTroughX + 2*scalePtr->borderWidth + scalePtr->width))) { return OTHER; } if ((y < scalePtr->inset) || (y >= (Tk_Height(scalePtr->tkwin) - scalePtr->inset))) { return OTHER; } sliderFirst = TkScaleValueToPixel(scalePtr, scalePtr->value) - scalePtr->sliderLength/2; if (y < sliderFirst) { return TROUGH1; } if (y < (sliderFirst+scalePtr->sliderLength)) { return SLIDER; } return TROUGH2; } if ((y < scalePtr->horizTroughY) || (y >= (scalePtr->horizTroughY + 2*scalePtr->borderWidth + scalePtr->width))) { return OTHER; } if ((x < scalePtr->inset) || (x >= (Tk_Width(scalePtr->tkwin) - scalePtr->inset))) { return OTHER; } sliderFirst = TkScaleValueToPixel(scalePtr, scalePtr->value) - scalePtr->sliderLength/2; if (x < sliderFirst) { return TROUGH1; } if (x < (sliderFirst+scalePtr->sliderLength)) { return SLIDER; } return TROUGH2; }
static void DisplayHorizontalValue( register TkScale *scalePtr, /* Information about widget in which to * display value. */ Drawable drawable, /* Pixmap or window in which to draw the * value. */ double value, /* X-coordinate of number to display, * specified in application coords, not in * pixels (we'll compute pixels). */ int top) /* Y-coordinate of top edge of text, specified * in pixels. */ { register Tk_Window tkwin = scalePtr->tkwin; int x, y, length, width; char valueString[PRINT_CHARS]; Tk_FontMetrics fm; x = TkScaleValueToPixel(scalePtr, value); Tk_GetFontMetrics(scalePtr->tkfont, &fm); y = top + fm.ascent; sprintf(valueString, scalePtr->format, value); length = (int) strlen(valueString); width = Tk_TextWidth(scalePtr->tkfont, valueString, length); /* * Adjust the x-coordinate if necessary to keep the text entirely inside * the window. */ x -= (width)/2; if (x < (scalePtr->inset + SPACING)) { x = scalePtr->inset + SPACING; } /* * Check the right border so use starting point +text width for the check. */ if (x + width >= (Tk_Width(tkwin) - scalePtr->inset)) { x = Tk_Width(tkwin) - scalePtr->inset - SPACING - width; } Tk_DrawChars(scalePtr->display, drawable, scalePtr->textGC, scalePtr->tkfont, valueString, length, x, y); }
static void DisplayVerticalValue( register TkScale *scalePtr, /* Information about widget in which to * display value. */ Drawable drawable, /* Pixmap or window in which to draw the * value. */ double value, /* Y-coordinate of number to display, * specified in application coords, not in * pixels (we'll compute pixels). */ int rightEdge) /* X-coordinate of right edge of text, * specified in pixels. */ { register Tk_Window tkwin = scalePtr->tkwin; int y, width, length; char valueString[PRINT_CHARS]; Tk_FontMetrics fm; Tk_GetFontMetrics(scalePtr->tkfont, &fm); y = TkScaleValueToPixel(scalePtr, value) + fm.ascent/2; sprintf(valueString, scalePtr->format, value); length = (int) strlen(valueString); width = Tk_TextWidth(scalePtr->tkfont, valueString, length); /* * Adjust the y-coordinate if necessary to keep the text entirely inside * the window. */ if ((y - fm.ascent) < (scalePtr->inset + SPACING)) { y = scalePtr->inset + SPACING + fm.ascent; } if ((y + fm.descent) > (Tk_Height(tkwin) - scalePtr->inset - SPACING)) { y = Tk_Height(tkwin) - scalePtr->inset - SPACING - fm.descent; } Tk_DrawChars(scalePtr->display, drawable, scalePtr->textGC, scalePtr->tkfont, valueString, length, rightEdge - width, y); }
static void DisplayVerticalScale( TkScale *scalePtr, /* Widget record for scale. */ Drawable drawable, /* Where to display scale (window or * pixmap). */ XRectangle *drawnAreaPtr) /* Initally contains area of window; if only a * part of the scale is redrawn, gets modified * to reflect the part of the window that was * redrawn. */ { Tk_Window tkwin = scalePtr->tkwin; int x, y, width, height, shadowWidth; double tickValue, tickInterval = scalePtr->tickInterval; Tk_3DBorder sliderBorder; /* * Display the information from left to right across the window. */ if (!(scalePtr->flags & REDRAW_OTHER)) { drawnAreaPtr->x = scalePtr->vertTickRightX; drawnAreaPtr->y = scalePtr->inset; drawnAreaPtr->width = scalePtr->vertTroughX + scalePtr->width + 2*scalePtr->borderWidth - scalePtr->vertTickRightX; drawnAreaPtr->height -= 2*scalePtr->inset; } Tk_Fill3DRectangle(tkwin, drawable, scalePtr->bgBorder, drawnAreaPtr->x, drawnAreaPtr->y, drawnAreaPtr->width, drawnAreaPtr->height, 0, TK_RELIEF_FLAT); if (scalePtr->flags & REDRAW_OTHER) { /* * Display the tick marks. */ if (tickInterval != 0) { double ticks, maxTicks; /* * Ensure that we will only draw enough of the tick values such * that they don't overlap */ ticks = fabs((scalePtr->toValue - scalePtr->fromValue) / tickInterval); maxTicks = (double) Tk_Height(tkwin) / (double) scalePtr->fontHeight; if (ticks > maxTicks) { tickInterval *= (ticks / maxTicks); } for (tickValue = scalePtr->fromValue; ; tickValue += tickInterval) { /* * The TkRoundToResolution call gets rid of accumulated * round-off errors, if any. */ tickValue = TkRoundToResolution(scalePtr, tickValue); if (scalePtr->toValue >= scalePtr->fromValue) { if (tickValue > scalePtr->toValue) { break; } } else { if (tickValue < scalePtr->toValue) { break; } } DisplayVerticalValue(scalePtr, drawable, tickValue, scalePtr->vertTickRightX); } } } /* * Display the value, if it is desired. */ if (scalePtr->showValue) { DisplayVerticalValue(scalePtr, drawable, scalePtr->value, scalePtr->vertValueRightX); } /* * Display the trough and the slider. */ Tk_Draw3DRectangle(tkwin, drawable, scalePtr->bgBorder, scalePtr->vertTroughX, scalePtr->inset, scalePtr->width + 2*scalePtr->borderWidth, Tk_Height(tkwin) - 2*scalePtr->inset, scalePtr->borderWidth, TK_RELIEF_SUNKEN); XFillRectangle(scalePtr->display, drawable, scalePtr->troughGC, scalePtr->vertTroughX + scalePtr->borderWidth, scalePtr->inset + scalePtr->borderWidth, (unsigned) scalePtr->width, (unsigned) (Tk_Height(tkwin) - 2*scalePtr->inset - 2*scalePtr->borderWidth)); if (scalePtr->state == STATE_ACTIVE) { sliderBorder = scalePtr->activeBorder; } else { sliderBorder = scalePtr->bgBorder; } width = scalePtr->width; height = scalePtr->sliderLength/2; x = scalePtr->vertTroughX + scalePtr->borderWidth; y = TkScaleValueToPixel(scalePtr, scalePtr->value) - height; shadowWidth = scalePtr->borderWidth/2; if (shadowWidth == 0) { shadowWidth = 1; } Tk_Draw3DRectangle(tkwin, drawable, sliderBorder, x, y, width, 2*height, shadowWidth, scalePtr->sliderRelief); x += shadowWidth; y += shadowWidth; width -= 2*shadowWidth; height -= shadowWidth; Tk_Fill3DRectangle(tkwin, drawable, sliderBorder, x, y, width, height, shadowWidth, scalePtr->sliderRelief); Tk_Fill3DRectangle(tkwin, drawable, sliderBorder, x, y+height, width, height, shadowWidth, scalePtr->sliderRelief); /* * Draw the label to the right of the scale. */ if ((scalePtr->flags & REDRAW_OTHER) && (scalePtr->labelLength != 0)) { Tk_FontMetrics fm; Tk_GetFontMetrics(scalePtr->tkfont, &fm); Tk_DrawChars(scalePtr->display, drawable, scalePtr->textGC, scalePtr->tkfont, scalePtr->label, scalePtr->labelLength, scalePtr->vertLabelX, scalePtr->inset + (3*fm.ascent)/2); } }
static void DisplayHorizontalScale( TkScale *scalePtr, /* Widget record for scale. */ Drawable drawable, /* Where to display scale (window or * pixmap). */ XRectangle *drawnAreaPtr) /* Initally contains area of window; if only a * part of the scale is redrawn, gets modified * to reflect the part of the window that was * redrawn. */ { register Tk_Window tkwin = scalePtr->tkwin; int x, y, width, height, shadowWidth; double tickValue, tickInterval = scalePtr->tickInterval; Tk_3DBorder sliderBorder; /* * Display the information from bottom to top across the window. */ if (!(scalePtr->flags & REDRAW_OTHER)) { drawnAreaPtr->x = scalePtr->inset; drawnAreaPtr->y = scalePtr->horizValueY; drawnAreaPtr->width -= 2*scalePtr->inset; drawnAreaPtr->height = scalePtr->horizTroughY + scalePtr->width + 2*scalePtr->borderWidth - scalePtr->horizValueY; } Tk_Fill3DRectangle(tkwin, drawable, scalePtr->bgBorder, drawnAreaPtr->x, drawnAreaPtr->y, drawnAreaPtr->width, drawnAreaPtr->height, 0, TK_RELIEF_FLAT); if (scalePtr->flags & REDRAW_OTHER) { /* * Display the tick marks. */ if (tickInterval != 0) { char valueString[PRINT_CHARS]; double ticks, maxTicks; /* * Ensure that we will only draw enough of the tick values such * that they don't overlap. We base this off the width that * fromValue would take. Not exact, but better than no constraint. */ ticks = fabs((scalePtr->toValue - scalePtr->fromValue) / tickInterval); sprintf(valueString, scalePtr->format, scalePtr->fromValue); maxTicks = (double) Tk_Width(tkwin) / (double) Tk_TextWidth(scalePtr->tkfont, valueString, -1); if (ticks > maxTicks) { tickInterval *= (ticks / maxTicks); } for (tickValue = scalePtr->fromValue; ; tickValue += tickInterval) { /* * The TkRoundToResolution call gets rid of accumulated * round-off errors, if any. */ tickValue = TkRoundToResolution(scalePtr, tickValue); if (scalePtr->toValue >= scalePtr->fromValue) { if (tickValue > scalePtr->toValue) { break; } } else { if (tickValue < scalePtr->toValue) { break; } } DisplayHorizontalValue(scalePtr, drawable, tickValue, scalePtr->horizTickY); } } } /* * Display the value, if it is desired. */ if (scalePtr->showValue) { DisplayHorizontalValue(scalePtr, drawable, scalePtr->value, scalePtr->horizValueY); } /* * Display the trough and the slider. */ y = scalePtr->horizTroughY; Tk_Draw3DRectangle(tkwin, drawable, scalePtr->bgBorder, scalePtr->inset, y, Tk_Width(tkwin) - 2*scalePtr->inset, scalePtr->width + 2*scalePtr->borderWidth, scalePtr->borderWidth, TK_RELIEF_SUNKEN); XFillRectangle(scalePtr->display, drawable, scalePtr->troughGC, scalePtr->inset + scalePtr->borderWidth, y + scalePtr->borderWidth, (unsigned) (Tk_Width(tkwin) - 2*scalePtr->inset - 2*scalePtr->borderWidth), (unsigned) scalePtr->width); if (scalePtr->state == STATE_ACTIVE) { sliderBorder = scalePtr->activeBorder; } else { sliderBorder = scalePtr->bgBorder; } width = scalePtr->sliderLength/2; height = scalePtr->width; x = TkScaleValueToPixel(scalePtr, scalePtr->value) - width; y += scalePtr->borderWidth; shadowWidth = scalePtr->borderWidth/2; if (shadowWidth == 0) { shadowWidth = 1; } Tk_Draw3DRectangle(tkwin, drawable, sliderBorder, x, y, 2*width, height, shadowWidth, scalePtr->sliderRelief); x += shadowWidth; y += shadowWidth; width -= shadowWidth; height -= 2*shadowWidth; Tk_Fill3DRectangle(tkwin, drawable, sliderBorder, x, y, width, height, shadowWidth, scalePtr->sliderRelief); Tk_Fill3DRectangle(tkwin, drawable, sliderBorder, x+width, y, width, height, shadowWidth, scalePtr->sliderRelief); /* * Draw the label at the top of the scale. */ if ((scalePtr->flags & REDRAW_OTHER) && (scalePtr->labelLength != 0)) { Tk_FontMetrics fm; Tk_GetFontMetrics(scalePtr->tkfont, &fm); Tk_DrawChars(scalePtr->display, drawable, scalePtr->textGC, scalePtr->tkfont, scalePtr->label, scalePtr->labelLength, scalePtr->inset + fm.ascent/2, scalePtr->horizLabelY + fm.ascent); } }
static int ScaleWidgetObjCmd( ClientData clientData, /* Information about scale widget. */ Tcl_Interp *interp, /* Current interpreter. */ int objc, /* Number of arguments. */ Tcl_Obj *const objv[]) /* Argument strings. */ { TkScale *scalePtr = clientData; Tcl_Obj *objPtr; int index, result; if (objc < 2) { Tcl_WrongNumArgs(interp, 1, objv, "option ?arg ...?"); return TCL_ERROR; } result = Tcl_GetIndexFromObj(interp, objv[1], commandNames, "option", 0, &index); if (result != TCL_OK) { return result; } Tcl_Preserve(scalePtr); switch (index) { case COMMAND_CGET: if (objc != 3) { Tcl_WrongNumArgs(interp, 1, objv, "cget option"); goto error; } objPtr = Tk_GetOptionValue(interp, (char *) scalePtr, scalePtr->optionTable, objv[2], scalePtr->tkwin); if (objPtr == NULL) { goto error; } Tcl_SetObjResult(interp, objPtr); break; case COMMAND_CONFIGURE: if (objc <= 3) { objPtr = Tk_GetOptionInfo(interp, (char *) scalePtr, scalePtr->optionTable, (objc == 3) ? objv[2] : NULL, scalePtr->tkwin); if (objPtr == NULL) { goto error; } Tcl_SetObjResult(interp, objPtr); } else { result = ConfigureScale(interp, scalePtr, objc-2, objv+2); } break; case COMMAND_COORDS: { int x, y; double value; Tcl_Obj *coords[2]; if ((objc != 2) && (objc != 3)) { Tcl_WrongNumArgs(interp, 1, objv, "coords ?value?"); goto error; } if (objc == 3) { if (Tcl_GetDoubleFromObj(interp, objv[2], &value) != TCL_OK) { goto error; } } else { value = scalePtr->value; } if (scalePtr->orient == ORIENT_VERTICAL) { x = scalePtr->vertTroughX + scalePtr->width/2 + scalePtr->borderWidth; y = TkScaleValueToPixel(scalePtr, value); } else { x = TkScaleValueToPixel(scalePtr, value); y = scalePtr->horizTroughY + scalePtr->width/2 + scalePtr->borderWidth; } coords[0] = Tcl_NewIntObj(x); coords[1] = Tcl_NewIntObj(y); Tcl_SetObjResult(interp, Tcl_NewListObj(2, coords)); break; } case COMMAND_GET: { double value; int x, y; if ((objc != 2) && (objc != 4)) { Tcl_WrongNumArgs(interp, 1, objv, "get ?x y?"); goto error; } if (objc == 2) { value = scalePtr->value; } else { if ((Tcl_GetIntFromObj(interp, objv[2], &x) != TCL_OK) || (Tcl_GetIntFromObj(interp, objv[3], &y) != TCL_OK)) { goto error; } value = TkScalePixelToValue(scalePtr, x, y); } Tcl_SetObjResult(interp, Tcl_ObjPrintf(scalePtr->format, value)); break; } case COMMAND_IDENTIFY: { int x, y; const char *zone = ""; if (objc != 4) { Tcl_WrongNumArgs(interp, 1, objv, "identify x y"); goto error; } if ((Tcl_GetIntFromObj(interp, objv[2], &x) != TCL_OK) || (Tcl_GetIntFromObj(interp, objv[3], &y) != TCL_OK)) { goto error; } switch (TkpScaleElement(scalePtr, x, y)) { case TROUGH1: zone = "trough1"; break; case SLIDER: zone = "slider"; break; case TROUGH2: zone = "trough2"; break; } Tcl_SetObjResult(interp, Tcl_NewStringObj(zone, -1)); break; } case COMMAND_SET: { double value; if (objc != 3) { Tcl_WrongNumArgs(interp, 1, objv, "set value"); goto error; } if (Tcl_GetDoubleFromObj(interp, objv[2], &value) != TCL_OK) { goto error; } if (scalePtr->state != STATE_DISABLED) { TkScaleSetValue(scalePtr, value, 1, 1); } break; } } Tcl_Release(scalePtr); return result; error: Tcl_Release(scalePtr); return TCL_ERROR; }