summaryrefslogtreecommitdiffstats
path: root/macosx/tkMacOSXScrlbr.c
diff options
context:
space:
mode:
authorwolfsuit <wolfsuit>2003-12-17 18:08:29 (GMT)
committerwolfsuit <wolfsuit>2003-12-17 18:08:29 (GMT)
commit7bbf35d799607f27798c04e1a2292bdcf2d5e8e9 (patch)
tree1f5a72bb62c74f03c8681cd3a06fd4fcc239a220 /macosx/tkMacOSXScrlbr.c
parente92fc386463d39f6cfa8c989c3ac4b66da3ec205 (diff)
downloadtk-7bbf35d799607f27798c04e1a2292bdcf2d5e8e9.zip
tk-7bbf35d799607f27798c04e1a2292bdcf2d5e8e9.tar.gz
tk-7bbf35d799607f27798c04e1a2292bdcf2d5e8e9.tar.bz2
Import fix for jerky scrollbar behavior from TOT.
Diffstat (limited to 'macosx/tkMacOSXScrlbr.c')
-rw-r--r--macosx/tkMacOSXScrlbr.c134
1 files changed, 84 insertions, 50 deletions
diff --git a/macosx/tkMacOSXScrlbr.c b/macosx/tkMacOSXScrlbr.c
index ecf7c59..f7e40e5 100644
--- a/macosx/tkMacOSXScrlbr.c
+++ b/macosx/tkMacOSXScrlbr.c
@@ -11,7 +11,7 @@
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
- * RCS: @(#) $Id: tkMacOSXScrlbr.c,v 1.5 2002/11/20 05:21:08 wolfsuit Exp $
+ * RCS: @(#) $Id: tkMacOSXScrlbr.c,v 1.5.2.1 2003/12/17 18:08:29 wolfsuit Exp $
*/
#include "tkScrollbar.h"
@@ -42,8 +42,8 @@ enum {
#define MIN_SLIDER_LENGTH 5
#define MIN_SCROLLBAR_VALUE 0
-#define MAX_SCROLLBAR_VALUE 1000
-#define MAX_SCROLLBAR_DVALUE 1000.0
+#define SCROLLBAR_SCALING_VALUE 100000
+#define SCROLLBAR_SCALING_DVALUE 100000.0
/*
* Declaration of Windows specific scrollbar structure.
@@ -95,8 +95,12 @@ typedef struct MacScrollbar {
*/
static ControlActionUPP scrollActionProc = NULL; /* Pointer to func. */
static ThumbActionUPP thumbActionProc = NULL; /* Pointer to func. */
-static TkScrollbar *activeScrollPtr = NULL; /* Non-null when in thumb */
+static TkScrollbar *activeScrollPtr = NULL; /* Non-null when in thumb */
/* proc. */
+static Point activePoint; /* Used when
+ * activeScrollPtr is
+ * non-NULL */
+
/*
* Forward declarations for procedures defined later in this file:
*/
@@ -237,9 +241,9 @@ TkpDisplayScrollbar(
if (macScrollPtr->sbHandle == NULL) {
Rect r;
- SInt16 initialValue;
- SInt16 minValue;
- SInt16 maxValue;
+ SInt32 initialValue;
+ SInt32 minValue;
+ SInt32 maxValue;
SInt16 procID;
WindowRef frontNonFloating;
@@ -247,7 +251,7 @@ TkpDisplayScrollbar(
r.right = r.bottom = 1;
minValue = MIN_SCROLLBAR_VALUE;
- maxValue = MAX_SCROLLBAR_VALUE;
+ maxValue = SCROLLBAR_SCALING_VALUE;
initialValue = (minValue + maxValue)/2;
procID = kControlScrollBarLiveProc;
@@ -578,7 +582,7 @@ ThumbActionProc()
register TkScrollbar *scrollPtr = activeScrollPtr;
register MacScrollbar *macScrollPtr = (MacScrollbar *) activeScrollPtr;
Tcl_DString cmdString;
- int origValue, trackBarPin;
+ int origValue;
double thumbWidth, newFirstFraction, trackBarSize;
char valueString[40];
Point currentPoint = { 0, 0 };
@@ -603,21 +607,20 @@ ThumbActionProc()
* Note: the arrowLength is equal to the thumb width of a Mac scrollbar.
*/
- origValue = GetControlValue(macScrollPtr->sbHandle);
+ origValue = GetControl32BitValue(macScrollPtr->sbHandle);
GetControlBounds(macScrollPtr->sbHandle, &trackRect);
+
+ thumbWidth = scrollPtr->lastFraction - scrollPtr->firstFraction;
+
if (scrollPtr->vertical == true) {
trackBarSize = (double) (trackRect.bottom - trackRect.top
- - (scrollPtr->arrowLength * 3));
- trackBarPin = trackRect.top + scrollPtr->arrowLength
- + (scrollPtr->arrowLength / 2);
- InsetRect(&trackRect, -25, -113);
+ - (scrollPtr->arrowLength * 3));
+ InsetRect(&trackRect, -50, -226);
} else {
trackBarSize = (double) (trackRect.right - trackRect.left
- - (scrollPtr->arrowLength * 3));
- trackBarPin = trackRect.left + scrollPtr->arrowLength
- + (scrollPtr->arrowLength / 2);
- InsetRect(&trackRect, -113, -25);
+ - (scrollPtr->arrowLength * 3));
+ InsetRect(&trackRect, -226, -50);
}
/*
@@ -638,24 +641,29 @@ ThumbActionProc()
&& ((trackingResult == kMouseTrackingMouseDragged)
|| (trackingResult == kMouseTrackingMouseMoved))) {
/*
- * Calculating this value is a little tricky. We need to calculate a
- * value for where the thumb would be in a Motif widget (variable
- * thumb). This value is what the "command" expects and is what will
- * be resent to the scrollbar to update its value.
+ * Calculate where the scrollbar should move to, and reset the
+ * activePoint to where we are now.
*/
- thumbWidth = scrollPtr->lastFraction - scrollPtr->firstFraction;
+ newFirstFraction = scrollPtr->firstFraction;
if (PtInRect(currentPoint, &trackRect)) {
+ double pixDiff;
+ double fracDelta;
if (scrollPtr->vertical == true) {
- newFirstFraction = (1.0 - thumbWidth) *
- ((double) (currentPoint.v - trackBarPin) / trackBarSize);
+ pixDiff = (double)(currentPoint.v - activePoint.v);
} else {
- newFirstFraction = (1.0 - thumbWidth) *
- ((double) (currentPoint.h - trackBarPin) / trackBarSize);
+ pixDiff = (double)(currentPoint.h - activePoint.h);
}
- } else {
- newFirstFraction = ((double) origValue / MAX_SCROLLBAR_DVALUE)
- * (1.0 - thumbWidth);
- }
+ fracDelta = pixDiff/(trackBarSize);
+ newFirstFraction += fracDelta;
+ if (newFirstFraction > 1.0) {
+ newFirstFraction = 1.0;
+ } else if (newFirstFraction < 0.0) {
+ newFirstFraction = 0.0;
+ }
+ }
+
+ activePoint = currentPoint;
+
sprintf(valueString, "%g", newFirstFraction);
Tcl_DStringSetLength(&cmdString, 0);
Tcl_DStringAppend(&cmdString, scrollPtr->command,
@@ -763,10 +771,10 @@ ScrollbarBindProc(
macScrollPtr->macFlags |= IN_MODAL_LOOP;
if (eventPtr->type == ButtonPress) {
- Point where;
- Rect bounds;
- int part, x, y, dummy;
- unsigned int state;
+ Point where;
+ Rect bounds;
+ int part, x, y, dummy;
+ unsigned int state;
CGrafPtr saveWorld;
GDHandle saveDevice;
GWorldPtr destPort;
@@ -783,8 +791,8 @@ ScrollbarBindProc(
TkMacOSXSetUpClippingRgn(Tk_WindowId(scrollPtr->tkwin));
TkMacOSXWinBounds((TkWindow *) scrollPtr->tkwin, &bounds);
- where.h = eventPtr->xbutton.x + bounds.left;
- where.v = eventPtr->xbutton.y + bounds.top;
+ where.h = eventPtr->xbutton.x + bounds.left;
+ where.v = eventPtr->xbutton.y + bounds.top;
part = TestControl(macScrollPtr->sbHandle, where);
if (part == kControlIndicatorPart && scrollPtr->jump == false) {
/*
@@ -794,6 +802,8 @@ ScrollbarBindProc(
* so the callback may have access to it.
*/
activeScrollPtr = scrollPtr;
+ activePoint.h = where.h;
+ activePoint.v = where.v;
part = TrackControl(macScrollPtr->sbHandle, where,
(ControlActionUPP) thumbActionProc);
activeScrollPtr = NULL;
@@ -816,8 +826,9 @@ ScrollbarBindProc(
*/
thumbWidth = scrollPtr->lastFraction
- scrollPtr->firstFraction;
- newFirstFraction = (1.0 - thumbWidth) *
- ((double) GetControlValue(macScrollPtr->sbHandle) / MAX_SCROLLBAR_DVALUE);
+ newFirstFraction = (1.0 - thumbWidth) *
+ ((double) GetControl32BitValue(macScrollPtr->sbHandle) / SCROLLBAR_SCALING_DVALUE);
+
sprintf(valueString, "%g", newFirstFraction);
Tcl_DStringInit(&cmdString);
@@ -931,8 +942,8 @@ UpdateControlValues(
Tk_Window tkwin = scrollPtr->tkwin;
MacDrawable * macDraw = (MacDrawable *) Tk_WindowId(scrollPtr->tkwin);
WindowRef windowRef = GetControlOwner(macScrollPtr->sbHandle);
- double middle;
- SInt32 viewSize;
+ double dViewSize;
+ SInt32 viewSize, controlMax, controlValue;
int flushRight = false;
int flushBottom = false;
Rect contrlRect, portRect;
@@ -1066,23 +1077,46 @@ UpdateControlValues(
/*
* Given the Tk parameters for the fractions of the start and
* end of the thumb, the following calculation determines the
- * location for the fixed sized Macintosh thumb.
+ * location for the Macintosh thumb.
+ * The Aqua scroll control works as follows.
+ * The scrollbar's value is the position of the left (or top) side of
+ * the view area in the content area being scrolled.
+ * The maximum value of the control is therefore the dimension of
+ * the content area less the size of the view area.
+ * Since these values are all integers, and Tk gives the thumb position
+ * as fractions, we have introduced a scaling factor.
+ *
*/
- middle = scrollPtr->firstFraction / (scrollPtr->firstFraction +
- (1.0 - scrollPtr->lastFraction));
+ dViewSize = (scrollPtr->lastFraction - scrollPtr->firstFraction)
+ * SCROLLBAR_SCALING_DVALUE;
- viewSize = (SInt32) ((scrollPtr->lastFraction - scrollPtr->firstFraction)
- * MAX_SCROLLBAR_DVALUE);
+ viewSize = (SInt32) dViewSize;
+ controlMax = (SInt32) (SCROLLBAR_SCALING_DVALUE - dViewSize);
+ controlValue = (SInt32) (SCROLLBAR_SCALING_DVALUE * scrollPtr->firstFraction);
+
+ SetControlViewSize(macScrollPtr->sbHandle,viewSize);
+ SetControl32BitValue(macScrollPtr->sbHandle, controlValue);
+ SetControl32BitMaximum(macScrollPtr->sbHandle, controlMax);
+
+#if 0
+ middle = scrollPtr->firstFraction /
+ (1.0 - (scrollPtr->lastFraction - scrollPtr->firstFraction));
+ viewSize = (SInt32) ((scrollPtr->lastFraction - scrollPtr->firstFraction)
+ * SCROLLBAR_SCALING_DVALUE
+ / (1.0 - (scrollPtr->lastFraction - scrollPtr->firstFraction)));
+
+
SetControlViewSize(macScrollPtr->sbHandle,viewSize);
- SetControlValue(macScrollPtr->sbHandle,
- (short) (middle * MAX_SCROLLBAR_VALUE) );
+ SetControl32BitValue(macScrollPtr->sbHandle,
+ (middle) );
+#endif
contrlHilite = GetControlHilite(macScrollPtr->sbHandle);
- SetControlMinimum(macScrollPtr->sbHandle, 0);
+ SetControl32BitMinimum(macScrollPtr->sbHandle, 0);
if ( contrlHilite == 0 || contrlHilite == 255) {
if (scrollPtr->firstFraction == 0.0 &&
scrollPtr->lastFraction == 1.0) {
- SetControlMinimum(macScrollPtr->sbHandle, MAX_SCROLLBAR_VALUE);
+ SetControl32BitMinimum(macScrollPtr->sbHandle, SCROLLBAR_SCALING_VALUE);
} else {
HiliteControl(macScrollPtr->sbHandle, 0);
}