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authorrjohnson <rjohnson>1998-04-01 09:51:44 (GMT)
committerrjohnson <rjohnson>1998-04-01 09:51:44 (GMT)
commit066ea7fd88d49cb456f74da71dbe875e4fc0aabb (patch)
tree8fb30cb152c4dc191be47fa043d2e6f5ea38c7ba /mac/tkMacScale.c
parent13242623d2ff3ea02ab6a62bfb48a7dbb5c27e22 (diff)
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Initial revision
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-rw-r--r--mac/tkMacScale.c603
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diff --git a/mac/tkMacScale.c b/mac/tkMacScale.c
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+/*
+ * tkMacScale.c --
+ *
+ * This file implements the Macintosh specific portion of the
+ * scale widget.
+ *
+ * Copyright (c) 1996 by Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * SCCS: @(#) tkMacScale.c 1.3 96/10/17 13:16:18
+ */
+
+#include "tkScale.h"
+#include "tkInt.h"
+#include <Controls.h>
+#include "tkMacInt.h"
+
+/*
+ * Defines used in this file.
+ */
+#define slider 1110
+#define inSlider 1
+#define inInc 2
+#define inDecr 3
+
+/*
+ * Declaration of Macintosh specific scale structure.
+ */
+
+typedef struct MacScale {
+ TkScale info; /* Generic scale info. */
+ int flags; /* Flags. */
+ ControlRef scaleHandle; /* Handle to the Scale control struct. */
+} MacScale;
+
+/*
+ * Globals uses locally in this file.
+ */
+static ControlActionUPP scaleActionProc = NULL; /* Pointer to func. */
+
+/*
+ * Forward declarations for procedures defined later in this file:
+ */
+
+static void MacScaleEventProc _ANSI_ARGS_((ClientData clientData,
+ XEvent *eventPtr));
+static pascal void ScaleActionProc _ANSI_ARGS_((ControlRef theControl,
+ ControlPartCode partCode));
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpCreateScale --
+ *
+ * Allocate a new TkScale structure.
+ *
+ * Results:
+ * Returns a newly allocated TkScale structure.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+TkScale *
+TkpCreateScale(tkwin)
+ Tk_Window tkwin;
+{
+ MacScale *macScalePtr;;
+
+ macScalePtr = (MacScale *) ckalloc(sizeof(MacScale));
+ macScalePtr->scaleHandle = NULL;
+ if (scaleActionProc == NULL) {
+ scaleActionProc = NewControlActionProc(ScaleActionProc);
+ }
+
+ Tk_CreateEventHandler(tkwin, ButtonPressMask,
+ MacScaleEventProc, (ClientData) macScalePtr);
+
+ return (TkScale *) macScalePtr;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpDestroyScale --
+ *
+ * Free Macintosh specific resources.
+ *
+ * Results:
+ * None
+ *
+ * Side effects:
+ * The slider control is destroyed.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkpDestroyScale(scalePtr)
+ TkScale *scalePtr;
+{
+ MacScale *macScalePtr = (MacScale *) scalePtr;
+
+ /*
+ * Free Macintosh control.
+ */
+ if (macScalePtr->scaleHandle != NULL) {
+ DisposeControl(macScalePtr->scaleHandle);
+ }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpDisplayScale --
+ *
+ * This procedure is invoked as an idle handler to redisplay
+ * the contents of a scale widget.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * The scale gets redisplayed.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+TkpDisplayScale(clientData)
+ ClientData clientData; /* Widget record for scale. */
+{
+ TkScale *scalePtr = (TkScale *) clientData;
+ Tk_Window tkwin = scalePtr->tkwin;
+ Tcl_Interp *interp = scalePtr->interp;
+ int result;
+ char string[PRINT_CHARS];
+ MacScale *macScalePtr = (MacScale *) clientData;
+ Rect r;
+ WindowRef windowRef;
+ GWorldPtr destPort;
+ CGrafPtr saveWorld;
+ GDHandle saveDevice;
+ MacDrawable *macDraw;
+
+ if ((scalePtr->tkwin == NULL) || !Tk_IsMapped(scalePtr->tkwin)) {
+ goto done;
+ }
+
+ /*
+ * Invoke the scale's command if needed.
+ */
+
+ Tcl_Preserve((ClientData) scalePtr);
+ if ((scalePtr->flags & INVOKE_COMMAND) && (scalePtr->command != NULL)) {
+ Tcl_Preserve((ClientData) interp);
+ sprintf(string, scalePtr->format, scalePtr->value);
+ result = Tcl_VarEval(interp, scalePtr->command, " ", string,
+ (char *) NULL);
+ if (result != TCL_OK) {
+ Tcl_AddErrorInfo(interp, "\n (command executed by scale)");
+ Tcl_BackgroundError(interp);
+ }
+ Tcl_Release((ClientData) interp);
+ }
+ scalePtr->flags &= ~INVOKE_COMMAND;
+ if (scalePtr->tkwin == NULL) {
+ Tcl_Release((ClientData) scalePtr);
+ return;
+ }
+ Tcl_Release((ClientData) scalePtr);
+
+ /*
+ * Now handle the part of redisplay that is the same for
+ * horizontal and vertical scales: border and traversal
+ * highlight.
+ */
+
+ if (scalePtr->highlightWidth != 0) {
+ GC gc;
+
+ if (scalePtr->flags & GOT_FOCUS) {
+ gc = Tk_GCForColor(scalePtr->highlightColorPtr, Tk_WindowId(tkwin));
+ } else {
+ gc = Tk_GCForColor(scalePtr->highlightBgColorPtr, Tk_WindowId(tkwin));
+ }
+ Tk_DrawFocusHighlight(tkwin, gc, scalePtr->highlightWidth, Tk_WindowId(tkwin));
+ }
+ Tk_Draw3DRectangle(tkwin, Tk_WindowId(tkwin), scalePtr->bgBorder,
+ scalePtr->highlightWidth, scalePtr->highlightWidth,
+ Tk_Width(tkwin) - 2*scalePtr->highlightWidth,
+ Tk_Height(tkwin) - 2*scalePtr->highlightWidth,
+ scalePtr->borderWidth, scalePtr->relief);
+
+ /*
+ * Set up port for drawing Macintosh control.
+ */
+ macDraw = (MacDrawable *) Tk_WindowId(tkwin);
+ destPort = TkMacGetDrawablePort(Tk_WindowId(tkwin));
+ GetGWorld(&saveWorld, &saveDevice);
+ SetGWorld(destPort, NULL);
+ TkMacSetUpClippingRgn(Tk_WindowId(tkwin));
+
+ /*
+ * Create Macintosh control.
+ */
+ if (macScalePtr->scaleHandle == NULL) {
+ r.left = r.top = 0;
+ r.right = r.bottom = 1;
+ /* TODO: initial value. */
+ /* 16*slider+4 */
+ macScalePtr->scaleHandle = NewControl((WindowRef) destPort,
+ &r, "\p", false, (short) 35, 0, 1000,
+ 16*slider, (SInt32) macScalePtr);
+
+ /*
+ * If we are foremost than make us active.
+ */
+ if ((WindowPtr) destPort == FrontWindow()) {
+ macScalePtr->flags |= ACTIVE;
+ }
+ }
+ windowRef = (**macScalePtr->scaleHandle).contrlOwner;
+
+ /*
+ * We can't use the Macintosh commands SizeControl and MoveControl as these
+ * calls will also cause a redraw which in our case will also cause
+ * flicker. To avoid this we adjust the control record directly. The
+ * Draw1Control command appears to just draw where ever the control says to
+ * draw so this seems right.
+ *
+ * NOTE: changing the control record directly may not work when
+ * Apple releases the Copland version of the MacOS in late 1996.
+ */
+
+ (**macScalePtr->scaleHandle).contrlRect.left = macDraw->xOff + scalePtr->inset;
+ (**macScalePtr->scaleHandle).contrlRect.top = macDraw->yOff + scalePtr->inset;
+ (**macScalePtr->scaleHandle).contrlRect.right = macDraw->xOff + Tk_Width(tkwin)
+ - scalePtr->inset;
+ (**macScalePtr->scaleHandle).contrlRect.bottom = macDraw->yOff +
+ Tk_Height(tkwin) - scalePtr->inset;
+
+ /*
+ * Set the thumb and resolution etc.
+ */
+ (**macScalePtr->scaleHandle).contrlMin = (SInt16) scalePtr->toValue;
+ (**macScalePtr->scaleHandle).contrlMax = (SInt16) scalePtr->fromValue;
+ (**macScalePtr->scaleHandle).contrlValue = (SInt16) scalePtr->value;
+
+ /*
+ * Finally draw the control.
+ */
+ (**macScalePtr->scaleHandle).contrlVis = 255;
+ (**macScalePtr->scaleHandle).contrlHilite = 0;
+ Draw1Control(macScalePtr->scaleHandle);
+
+ SetGWorld(saveWorld, saveDevice);
+
+ done:
+ scalePtr->flags &= ~REDRAW_ALL;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpScaleElement --
+ *
+ * Determine which part of a scale widget lies under a given
+ * point.
+ *
+ * Results:
+ * The return value is either TROUGH1, SLIDER, TROUGH2, or
+ * OTHER, depending on which of the scale's active elements
+ * (if any) is under the point at (x,y).
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TkpScaleElement(scalePtr, x, y)
+ TkScale *scalePtr; /* Widget record for scale. */
+ int x, y; /* Coordinates within scalePtr's window. */
+{
+ MacScale *macScalePtr = (MacScale *) scalePtr;
+ ControlPartCode part;
+ Point where;
+ Rect bounds;
+ CGrafPtr saveWorld;
+ GDHandle saveDevice;
+ GWorldPtr destPort;
+
+ destPort = TkMacGetDrawablePort(Tk_WindowId(scalePtr->tkwin));
+ GetGWorld(&saveWorld, &saveDevice);
+ SetGWorld(destPort, NULL);
+
+ /*
+ * All of the calculations in this procedure mirror those in
+ * DisplayScrollbar. Be sure to keep the two consistent.
+ */
+
+ TkMacWinBounds((TkWindow *) scalePtr->tkwin, &bounds);
+ where.h = x + bounds.left;
+ where.v = y + bounds.top;
+ part = TestControl(macScalePtr->scaleHandle, where);
+
+ SetGWorld(saveWorld, saveDevice);
+
+ switch (part) {
+ case inSlider:
+ return SLIDER;
+ case inInc:
+ if (scalePtr->vertical) {
+ return TROUGH1;
+ } else {
+ return TROUGH2;
+ }
+ case inDecr:
+ if (scalePtr->vertical) {
+ return TROUGH2;
+ } else {
+ return TROUGH1;
+ }
+ default:
+ return OTHER;
+ }
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * TkpSetScaleValue --
+ *
+ * This procedure changes the value of a scale and invokes
+ * a Tcl command to reflect the current position of a scale
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * A Tcl command is invoked, and an additional error-processing
+ * command may also be invoked. The scale's slider is redrawn.
+ *
+ *--------------------------------------------------------------
+ */
+
+void
+TkpSetScaleValue(scalePtr, value, setVar, invokeCommand)
+ register TkScale *scalePtr; /* Info about widget. */
+ double value; /* New value for scale. Gets adjusted
+ * if it's off the scale. */
+ int setVar; /* Non-zero means reflect new value through
+ * to associated variable, if any. */
+ int invokeCommand; /* Non-zero means invoked -command option
+ * to notify of new value, 0 means don't. */
+{
+ char string[PRINT_CHARS];
+
+ value = TkRoundToResolution(scalePtr, value);
+ if ((value < scalePtr->fromValue)
+ ^ (scalePtr->toValue < scalePtr->fromValue)) {
+ value = scalePtr->fromValue;
+ }
+ if ((value > scalePtr->toValue)
+ ^ (scalePtr->toValue < scalePtr->fromValue)) {
+ value = scalePtr->toValue;
+ }
+ if (scalePtr->flags & NEVER_SET) {
+ scalePtr->flags &= ~NEVER_SET;
+ } else if (scalePtr->value == value) {
+ return;
+ }
+ scalePtr->value = value;
+ if (invokeCommand) {
+ scalePtr->flags |= INVOKE_COMMAND;
+ }
+ TkEventuallyRedrawScale(scalePtr, REDRAW_SLIDER);
+
+ if (setVar && (scalePtr->varName != NULL)) {
+ sprintf(string, scalePtr->format, scalePtr->value);
+ scalePtr->flags |= SETTING_VAR;
+ Tcl_SetVar(scalePtr->interp, scalePtr->varName, string,
+ TCL_GLOBAL_ONLY);
+ scalePtr->flags &= ~SETTING_VAR;
+ }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpPixelToValue --
+ *
+ * Given a pixel within a scale window, return the scale
+ * reading corresponding to that pixel.
+ *
+ * Results:
+ * A double-precision scale reading. If the value is outside
+ * the legal range for the scale then it's rounded to the nearest
+ * end of the scale.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+double
+TkpPixelToValue(scalePtr, x, y)
+ register TkScale *scalePtr; /* Information about widget. */
+ int x, y; /* Coordinates of point within
+ * window. */
+{
+ double value, pixelRange;
+
+ if (scalePtr->vertical) {
+ pixelRange = Tk_Height(scalePtr->tkwin) - scalePtr->sliderLength
+ - 2*scalePtr->inset - 2*scalePtr->borderWidth;
+ value = y;
+ } else {
+ pixelRange = Tk_Width(scalePtr->tkwin) - scalePtr->sliderLength
+ - 2*scalePtr->inset - 2*scalePtr->borderWidth;
+ value = x;
+ }
+
+ if (pixelRange <= 0) {
+ /*
+ * Not enough room for the slider to actually slide: just return
+ * the scale's current value.
+ */
+
+ return scalePtr->value;
+ }
+ value -= scalePtr->sliderLength/2 + scalePtr->inset
+ + scalePtr->borderWidth;
+ value /= pixelRange;
+ if (value < 0) {
+ value = 0;
+ }
+ if (value > 1) {
+ value = 1;
+ }
+ value = scalePtr->fromValue +
+ value * (scalePtr->toValue - scalePtr->fromValue);
+ return TkRoundToResolution(scalePtr, value);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpValueToPixel --
+ *
+ * Given a reading of the scale, return the x-coordinate or
+ * y-coordinate corresponding to that reading, depending on
+ * whether the scale is vertical or horizontal, respectively.
+ *
+ * Results:
+ * An integer value giving the pixel location corresponding
+ * to reading. The value is restricted to lie within the
+ * defined range for the scale.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TkpValueToPixel(scalePtr, value)
+ register TkScale *scalePtr; /* Information about widget. */
+ double value; /* Reading of the widget. */
+{
+ int y, pixelRange;
+ double valueRange;
+
+ valueRange = scalePtr->toValue - scalePtr->fromValue;
+ pixelRange = (scalePtr->vertical ? Tk_Height(scalePtr->tkwin)
+ : Tk_Width(scalePtr->tkwin)) - scalePtr->sliderLength
+ - 2*scalePtr->inset - 2*scalePtr->borderWidth;
+ if (valueRange == 0) {
+ y = 0;
+ } else {
+ y = (int) ((value - scalePtr->fromValue) * pixelRange
+ / valueRange + 0.5);
+ if (y < 0) {
+ y = 0;
+ } else if (y > pixelRange) {
+ y = pixelRange;
+ }
+ }
+ y += scalePtr->sliderLength/2 + scalePtr->inset + scalePtr->borderWidth;
+ return y;
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * MacScaleEventProc --
+ *
+ * This procedure is invoked by the Tk dispatcher for
+ * ButtonPress events on scales.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * When the window gets deleted, internal structures get
+ * cleaned up. When it gets exposed, it is redisplayed.
+ *
+ *--------------------------------------------------------------
+ */
+
+static void
+MacScaleEventProc(clientData, eventPtr)
+ ClientData clientData; /* Information about window. */
+ XEvent *eventPtr; /* Information about event. */
+{
+ MacScale *macScalePtr = (MacScale *) clientData;
+ Point where;
+ Rect bounds;
+ int part, x, y, dummy;
+ unsigned int state;
+ CGrafPtr saveWorld;
+ GDHandle saveDevice;
+ GWorldPtr destPort;
+ Window dummyWin;
+
+ /*
+ * To call Macintosh control routines we must have the port
+ * set to the window containing the control. We will then test
+ * which part of the control was hit and act accordingly.
+ */
+ destPort = TkMacGetDrawablePort(Tk_WindowId(macScalePtr->info.tkwin));
+ GetGWorld(&saveWorld, &saveDevice);
+ SetGWorld(destPort, NULL);
+ TkMacSetUpClippingRgn(Tk_WindowId(macScalePtr->info.tkwin));
+
+ TkMacWinBounds((TkWindow *) macScalePtr->info.tkwin, &bounds);
+ where.h = eventPtr->xbutton.x + bounds.left;
+ where.v = eventPtr->xbutton.y + bounds.top;
+ part = TestControl(macScalePtr->scaleHandle, where);
+ if (part == 0) {
+ return;
+ }
+
+ part = TrackControl(macScalePtr->scaleHandle, where, scaleActionProc);
+
+ /*
+ * Update the value for the widget.
+ */
+ macScalePtr->info.value = (**macScalePtr->scaleHandle).contrlValue;
+ /* TkpSetScaleValue(&macScalePtr->info, macScalePtr->info.value, 1, 0); */
+
+ /*
+ * The TrackControl call will "eat" the ButtonUp event. We now
+ * generate a ButtonUp event so Tk will unset implicit grabs etc.
+ */
+ GetMouse(&where);
+ XQueryPointer(NULL, None, &dummyWin, &dummyWin, &x,
+ &y, &dummy, &dummy, &state);
+ TkGenerateButtonEvent(x, y, Tk_WindowId(macScalePtr->info.tkwin), state);
+
+ SetGWorld(saveWorld, saveDevice);
+}
+
+/*
+ *--------------------------------------------------------------
+ *
+ * ScaleActionProc --
+ *
+ * Callback procedure used by the Macintosh toolbox call
+ * TrackControl. This call will update the display while
+ * the scrollbar is being manipulated by the user.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * May change the display.
+ *
+ *--------------------------------------------------------------
+ */
+
+static pascal void
+ScaleActionProc(ControlRef theControl, ControlPartCode partCode)
+ /* ControlRef theControl; /* Handle to scrollbat control */
+ /* ControlPartCode partCode; /* Part of scrollbar that was "hit" */
+{
+ register int value;
+ register TkScale *scalePtr = (TkScale *) GetCRefCon(theControl);
+
+ value = (**theControl).contrlValue;
+ TkpSetScaleValue(scalePtr, value, 1, 1);
+ Tcl_Preserve((ClientData) scalePtr);
+ Tcl_DoOneEvent(TCL_IDLE_EVENTS);
+ Tcl_Release((ClientData) scalePtr);
+}
+