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tkWinButton.c
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tkWinButton.c
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/*
* tkWinButton.c --
*
* This file implements the Windows specific portion of the button
* widgets.
*
* Copyright (c) 1996-1998 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.
*/
#define OEMRESOURCE
#include "tkWinInt.h"
#include "tkButton.h"
/*
* These macros define the base style flags for the different button types.
*/
#define LABEL_STYLE (BS_OWNERDRAW | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS)
#define PUSH_STYLE (LABEL_STYLE | BS_PUSHBUTTON)
#define CHECK_STYLE (LABEL_STYLE | BS_CHECKBOX)
#define RADIO_STYLE (LABEL_STYLE | BS_RADIOBUTTON)
/*
* Declaration of Windows specific button structure.
*/
typedef struct WinButton {
TkButton info; /* Generic button info. */
WNDPROC oldProc; /* Old window procedure. */
HWND hwnd; /* Current window handle. */
Pixmap pixmap; /* Bitmap for rendering the button. */
DWORD style; /* Window style flags. */
} WinButton;
/*
* The following macro reverses the order of RGB bytes to convert between
* RGBQUAD and COLORREF values.
*/
#define FlipColor(rgb) (RGB(GetBValue(rgb),GetGValue(rgb),GetRValue(rgb)))
/*
* The following enumeration defines the meaning of the palette entries in the
* "buttons" image used to draw checkbox and radiobutton indicators.
*/
enum {
PAL_CHECK = 0,
PAL_TOP_OUTER = 1,
PAL_BOTTOM_OUTER = 2,
PAL_BOTTOM_INNER = 3,
PAL_INTERIOR = 4,
PAL_TOP_INNER = 5,
PAL_BACKGROUND = 6
};
/*
* Cached information about the boxes bitmap, and the default border width for
* a button in string form for use in Tk_OptionSpec for the various button
* widget classes.
*/
typedef struct ThreadSpecificData {
BITMAPINFOHEADER *boxesPtr; /* Information about the bitmap. */
DWORD *boxesPalette; /* Pointer to color palette. */
LPSTR boxesBits; /* Pointer to bitmap data. */
DWORD boxHeight; /* Height of each sub-image. */
DWORD boxWidth; /* Width of each sub-image. */
} ThreadSpecificData;
static Tcl_ThreadDataKey dataKey;
/*
* Declarations for functions defined in this file.
*/
static LRESULT CALLBACK ButtonProc(HWND hwnd, UINT message,
WPARAM wParam, LPARAM lParam);
static Window CreateProc(Tk_Window tkwin, Window parent,
ClientData instanceData);
static void InitBoxes(void);
/*
* The class procedure table for the button widgets.
*/
Tk_ClassProcs tkpButtonProcs = {
sizeof(Tk_ClassProcs), /* size */
TkButtonWorldChanged, /* worldChangedProc */
CreateProc, /* createProc */
NULL
};
/*
*----------------------------------------------------------------------
*
* InitBoxes --
*
* This function load the Tk 3d button bitmap. "buttons" is a 16 color
* bitmap that is laid out such that the top row contains the 4 checkbox
* images, and the bottom row contains the radio button images. Note that
* the bitmap is stored in bottom-up format. Also, the first seven
* palette entries are used to identify the different parts of the
* bitmaps so we can do the appropriate color mappings based on the
* current button colors.
*
* Results:
* None.
*
* Side effects:
* Loads the "buttons" resource.
*
*----------------------------------------------------------------------
*/
static void
InitBoxes(void)
{
/*
* For DLLs like Tk, the HINSTANCE is the same as the HMODULE.
*/
HMODULE module = (HINSTANCE) Tk_GetHINSTANCE();
HRSRC hrsrc;
HGLOBAL hblk;
LPBITMAPINFOHEADER newBitmap;
DWORD size;
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
hrsrc = FindResource(module, "buttons", RT_BITMAP);
if (hrsrc == NULL) {
Tcl_Panic("FindResource() failed for buttons bitmap resource, "
"resources in tk_base.rc must be linked into Tk dll or static executable");
} else {
hblk = LoadResource(module, hrsrc);
tsdPtr->boxesPtr = (LPBITMAPINFOHEADER)LockResource(hblk);
}
/*
* Copy the DIBitmap into writable memory.
*/
if (tsdPtr->boxesPtr != NULL && !(tsdPtr->boxesPtr->biWidth % 4)
&& !(tsdPtr->boxesPtr->biHeight % 2)) {
size = tsdPtr->boxesPtr->biSize + (1 << tsdPtr->boxesPtr->biBitCount)
* sizeof(RGBQUAD) + tsdPtr->boxesPtr->biSizeImage;
newBitmap = (LPBITMAPINFOHEADER) ckalloc(size);
memcpy(newBitmap, tsdPtr->boxesPtr, size);
tsdPtr->boxesPtr = newBitmap;
tsdPtr->boxWidth = tsdPtr->boxesPtr->biWidth / 4;
tsdPtr->boxHeight = tsdPtr->boxesPtr->biHeight / 2;
tsdPtr->boxesPalette = (DWORD*) (((LPSTR) tsdPtr->boxesPtr)
+ tsdPtr->boxesPtr->biSize);
tsdPtr->boxesBits = ((LPSTR) tsdPtr->boxesPalette)
+ ((1 << tsdPtr->boxesPtr->biBitCount) * sizeof(RGBQUAD));
} else {
tsdPtr->boxesPtr = NULL;
}
}
/*
*----------------------------------------------------------------------
*
* TkpButtonSetDefaults --
*
* This procedure is invoked before option tables are created for
* buttons. It modifies some of the default values to match the current
* values defined for this platform.
*
* Results:
* Some of the default values in *specPtr are modified.
*
* Side effects:
* Updates some of.
*
*----------------------------------------------------------------------
*/
void
TkpButtonSetDefaults(
Tk_OptionSpec *specPtr) /* Points to an array of option specs,
* terminated by one with type
* TK_OPTION_END. */
{
int width = GetSystemMetrics(SM_CXEDGE);
if (width > 0) {
sprintf(tkDefButtonBorderWidth, "%d", width);
}
}
/*
*----------------------------------------------------------------------
*
* TkpCreateButton --
*
* Allocate a new TkButton structure.
*
* Results:
* Returns a newly allocated TkButton structure.
*
* Side effects:
* Registers an event handler for the widget.
*
*----------------------------------------------------------------------
*/
TkButton *
TkpCreateButton(
Tk_Window tkwin)
{
WinButton *butPtr;
butPtr = (WinButton *)ckalloc(sizeof(WinButton));
butPtr->hwnd = NULL;
return (TkButton *) butPtr;
}
/*
*----------------------------------------------------------------------
*
* CreateProc --
*
* This function creates a new Button control, subclasses the instance,
* and generates a new Window object.
*
* Results:
* Returns the newly allocated Window object, or None on failure.
*
* Side effects:
* Causes a new Button control to come into existence.
*
*----------------------------------------------------------------------
*/
static Window
CreateProc(
Tk_Window tkwin, /* Token for window. */
Window parentWin, /* Parent of new window. */
ClientData instanceData) /* Button instance data. */
{
Window window;
HWND parent;
char *class;
WinButton *butPtr = (WinButton *)instanceData;
parent = Tk_GetHWND(parentWin);
if (butPtr->info.type == TYPE_LABEL) {
class = "STATIC";
butPtr->style = SS_OWNERDRAW | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS;
} else {
class = "BUTTON";
butPtr->style = BS_OWNERDRAW | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS;
}
butPtr->hwnd = CreateWindow(class, NULL, butPtr->style,
Tk_X(tkwin), Tk_Y(tkwin), Tk_Width(tkwin), Tk_Height(tkwin),
parent, NULL, Tk_GetHINSTANCE(), NULL);
SetWindowPos(butPtr->hwnd, HWND_TOP, 0, 0, 0, 0,
SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE);
butPtr->oldProc = (WNDPROC)SetWindowLongPtr(butPtr->hwnd, GWLP_WNDPROC,
(INT_PTR) ButtonProc);
window = Tk_AttachHWND(tkwin, butPtr->hwnd);
return window;
}
/*
*----------------------------------------------------------------------
*
* TkpDestroyButton --
*
* Free data structures associated with the button control.
*
* Results:
* None.
*
* Side effects:
* Restores the default control state.
*
*----------------------------------------------------------------------
*/
void
TkpDestroyButton(
TkButton *butPtr)
{
WinButton *winButPtr = (WinButton *)butPtr;
HWND hwnd = winButPtr->hwnd;
if (hwnd) {
SetWindowLongPtr(hwnd, GWLP_WNDPROC, (INT_PTR) winButPtr->oldProc);
}
}
/*
*----------------------------------------------------------------------
*
* TkpDisplayButton --
*
* This procedure is invoked to display a button widget. It is normally
* invoked as an idle handler.
*
* Results:
* None.
*
* Side effects:
* Information appears on the screen. The REDRAW_PENDING flag is cleared.
*
*----------------------------------------------------------------------
*/
void
TkpDisplayButton(
ClientData clientData) /* Information about widget. */
{
TkWinDCState state;
HDC dc;
register TkButton *butPtr = (TkButton *) clientData;
GC gc;
Tk_3DBorder border;
Pixmap pixmap;
int x = 0; /* Initialization only needed to stop compiler
* warning. */
int y, relief;
register Tk_Window tkwin = butPtr->tkwin;
int width = 0, height = 0, haveImage = 0, haveText = 0, drawRing = 0;
RECT rect;
int defaultWidth; /* Width of default ring. */
int offset; /* 0 means this is a label widget. 1 means it
* is a flavor of button, so we offset the
* text to make the button appear to move up
* and down as the relief changes. */
int textXOffset = 0, textYOffset = 0;
/* Text offsets for use with compound buttons
* and focus ring. */
int imageWidth, imageHeight;
int imageXOffset = 0, imageYOffset = 0;
/* Image information that will be used to
* restrict disabled pixmap as well. */
DWORD *boxesPalette;
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
boxesPalette= tsdPtr->boxesPalette;
butPtr->flags &= ~REDRAW_PENDING;
if ((butPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
return;
}
border = butPtr->normalBorder;
if ((butPtr->state == STATE_DISABLED) && (butPtr->disabledFg != NULL)) {
gc = butPtr->disabledGC;
} else if ((butPtr->state == STATE_ACTIVE)
&& !Tk_StrictMotif(butPtr->tkwin)) {
gc = butPtr->activeTextGC;
border = butPtr->activeBorder;
} else {
gc = butPtr->normalTextGC;
}
if ((butPtr->flags & SELECTED) && (butPtr->state != STATE_ACTIVE)
&& (butPtr->selectBorder != NULL) && !butPtr->indicatorOn) {
border = butPtr->selectBorder;
}
/*
* Override the relief specified for the button if this is a checkbutton
* or radiobutton and there's no indicator. The new relief is as follows:
* If the button is select --> "sunken"
* If relief==overrelief --> relief
* Otherwise --> overrelief
*
* The effect we are trying to achieve is as follows:
*
* value mouse-over? --> relief
* ------- ------------ --------
* off no flat
* off yes raised
* on no sunken
* on yes sunken
*
* This is accomplished by configuring the checkbutton or radiobutton like
* this:
*
* -indicatoron 0 -overrelief raised -offrelief flat
*
* Bindings (see library/button.tcl) will copy the -overrelief into
* -relief on mouseover. Hence, we can tell if we are in mouse-over by
* comparing relief against overRelief. This is an aweful kludge, but it
* gives use the desired behavior while keeping the code backwards
* compatible.
*/
relief = butPtr->relief;
if ((butPtr->type >= TYPE_CHECK_BUTTON) && !butPtr->indicatorOn) {
if (butPtr->flags & SELECTED) {
relief = TK_RELIEF_SUNKEN;
} else if (butPtr->overRelief != relief) {
relief = butPtr->offRelief;
}
}
/*
* Compute width of default ring and offset for pushed buttons.
*/
if (butPtr->type == TYPE_BUTTON) {
defaultWidth = ((butPtr->defaultState == DEFAULT_ACTIVE)
? butPtr->highlightWidth : 0);
offset = 1;
} else {
defaultWidth = 0;
if ((butPtr->type >= TYPE_CHECK_BUTTON) && !butPtr->indicatorOn) {
offset = 1;
} else {
offset = 0;
}
}
/*
* In order to avoid screen flashes, this procedure redraws the button in
* a pixmap, then copies the pixmap to the screen in a single operation.
* This means that there's no point in time where the on-sreen image has
* been cleared.
*/
pixmap = Tk_GetPixmap(butPtr->display, Tk_WindowId(tkwin),
Tk_Width(tkwin), Tk_Height(tkwin), Tk_Depth(tkwin));
Tk_Fill3DRectangle(tkwin, pixmap, border, 0, 0, Tk_Width(tkwin),
Tk_Height(tkwin), 0, TK_RELIEF_FLAT);
/*
* Display image or bitmap or text for button.
*/
if (butPtr->image != None) {
Tk_SizeOfImage(butPtr->image, &width, &height);
haveImage = 1;
} else if (butPtr->bitmap != None) {
Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, &width, &height);
haveImage = 1;
}
imageWidth = width;
imageHeight = height;
haveText = (butPtr->textWidth != 0 && butPtr->textHeight != 0);
if (butPtr->compound != COMPOUND_NONE && haveImage && haveText) {
int fullWidth = 0, fullHeight = 0;
switch ((enum compound) butPtr->compound) {
case COMPOUND_TOP:
case COMPOUND_BOTTOM:
/*
* Image is above or below text.
*/
if (butPtr->compound == COMPOUND_TOP) {
textYOffset = height + butPtr->padY;
} else {
imageYOffset = butPtr->textHeight + butPtr->padY;
}
fullHeight = height + butPtr->textHeight + butPtr->padY;
fullWidth = (width > butPtr->textWidth ? width :
butPtr->textWidth);
textXOffset = (fullWidth - butPtr->textWidth)/2;
imageXOffset = (fullWidth - width)/2;
break;
case COMPOUND_LEFT:
case COMPOUND_RIGHT:
/*
* Image is left or right of text.
*/
if (butPtr->compound == COMPOUND_LEFT) {
textXOffset = width + butPtr->padX;
} else {
imageXOffset = butPtr->textWidth + butPtr->padX;
}
fullWidth = butPtr->textWidth + butPtr->padX + width;
fullHeight = (height > butPtr->textHeight ? height :
butPtr->textHeight);
textYOffset = (fullHeight - butPtr->textHeight)/2;
imageYOffset = (fullHeight - height)/2;
break;
case COMPOUND_CENTER:
/*
* Image and text are superimposed.
*/
fullWidth = (width > butPtr->textWidth ? width :
butPtr->textWidth);
fullHeight = (height > butPtr->textHeight ? height :
butPtr->textHeight);
textXOffset = (fullWidth - butPtr->textWidth)/2;
imageXOffset = (fullWidth - width)/2;
textYOffset = (fullHeight - butPtr->textHeight)/2;
imageYOffset = (fullHeight - height)/2;
break;
case COMPOUND_NONE:
break;
}
TkComputeAnchor(butPtr->anchor, tkwin, butPtr->padX, butPtr->padY,
butPtr->indicatorSpace + fullWidth, fullHeight, &x, &y);
x += butPtr->indicatorSpace;
if (relief == TK_RELIEF_SUNKEN) {
x += offset;
y += offset;
}
imageXOffset += x;
imageYOffset += y;
if (butPtr->image != NULL) {
if ((butPtr->selectImage != NULL) && (butPtr->flags & SELECTED)) {
Tk_RedrawImage(butPtr->selectImage, 0, 0,
width, height, pixmap, imageXOffset, imageYOffset);
} else if ((butPtr->tristateImage != NULL)
&& (butPtr->flags & TRISTATED)) {
Tk_RedrawImage(butPtr->tristateImage, 0, 0,
width, height, pixmap, imageXOffset, imageYOffset);
} else {
Tk_RedrawImage(butPtr->image, 0, 0, width, height, pixmap,
imageXOffset, imageYOffset);
}
} else {
XSetClipOrigin(butPtr->display, gc, imageXOffset, imageYOffset);
XCopyPlane(butPtr->display, butPtr->bitmap, pixmap, gc,
0, 0, (unsigned int) width, (unsigned int) height,
imageXOffset, imageYOffset, 1);
XSetClipOrigin(butPtr->display, gc, 0, 0);
}
if ((butPtr->state == STATE_DISABLED) &&
(butPtr->disabledFg != NULL)) {
COLORREF oldFgColor = gc->foreground;
if (gc->background == GetSysColor(COLOR_BTNFACE)) {
gc->foreground = GetSysColor(COLOR_3DHILIGHT);
Tk_DrawTextLayout(butPtr->display, pixmap, gc,
butPtr->textLayout, x + textXOffset + 1,
y + textYOffset + 1, 0, -1);
Tk_UnderlineTextLayout(butPtr->display, pixmap, gc,
butPtr->textLayout, x + textXOffset + 1,
y + textYOffset + 1,
butPtr->underline);
gc->foreground = oldFgColor;
}
}
Tk_DrawTextLayout(butPtr->display, pixmap, gc,
butPtr->textLayout, x + textXOffset, y + textYOffset, 0, -1);
Tk_UnderlineTextLayout(butPtr->display, pixmap, gc,
butPtr->textLayout, x + textXOffset, y + textYOffset,
butPtr->underline);
height = fullHeight;
drawRing = 1;
} else {
if (haveImage) {
TkComputeAnchor(butPtr->anchor, tkwin, 0, 0,
butPtr->indicatorSpace + width, height, &x, &y);
x += butPtr->indicatorSpace;
if (relief == TK_RELIEF_SUNKEN) {
x += offset;
y += offset;
}
imageXOffset += x;
imageYOffset += y;
if (butPtr->image != NULL) {
if ((butPtr->selectImage != NULL) &&
(butPtr->flags & SELECTED)) {
Tk_RedrawImage(butPtr->selectImage, 0, 0, width, height,
pixmap, imageXOffset, imageYOffset);
} else if ((butPtr->tristateImage != NULL) &&
(butPtr->flags & TRISTATED)) {
Tk_RedrawImage(butPtr->tristateImage, 0, 0, width, height,
pixmap, imageXOffset, imageYOffset);
} else {
Tk_RedrawImage(butPtr->image, 0, 0, width, height, pixmap,
imageXOffset, imageYOffset);
}
} else {
XSetClipOrigin(butPtr->display, gc, x, y);
XCopyPlane(butPtr->display, butPtr->bitmap, pixmap, gc, 0, 0,
(unsigned int) width, (unsigned int) height, x, y, 1);
XSetClipOrigin(butPtr->display, gc, 0, 0);
}
} else {
TkComputeAnchor(butPtr->anchor, tkwin, butPtr->padX, butPtr->padY,
butPtr->indicatorSpace + butPtr->textWidth,
butPtr->textHeight, &x, &y);
x += butPtr->indicatorSpace;
if (relief == TK_RELIEF_SUNKEN) {
x += offset;
y += offset;
}
if ((butPtr->state == STATE_DISABLED) &&
(butPtr->disabledFg != NULL)) {
COLORREF oldFgColor = gc->foreground;
if (gc->background == GetSysColor(COLOR_BTNFACE)) {
gc->foreground = GetSysColor(COLOR_3DHILIGHT);
Tk_DrawTextLayout(butPtr->display, pixmap, gc,
butPtr->textLayout,
x + 1, y + 1, 0, -1);
Tk_UnderlineTextLayout(butPtr->display, pixmap, gc,
butPtr->textLayout, x + 1, y + 1, butPtr->underline);
gc->foreground = oldFgColor;
}
}
Tk_DrawTextLayout(butPtr->display, pixmap, gc, butPtr->textLayout,
x, y, 0, -1);
Tk_UnderlineTextLayout(butPtr->display, pixmap, gc,
butPtr->textLayout, x, y, butPtr->underline);
height = butPtr->textHeight;
drawRing = 1;
}
}
/*
* Draw the focus ring. If this is a push button then we need to put it
* around the inner edge of the border, otherwise we put it around the
* text. The text offsets are only non-zero when this is a compound
* button.
*/
if (drawRing && butPtr->flags & GOT_FOCUS && butPtr->type != TYPE_LABEL) {
dc = TkWinGetDrawableDC(butPtr->display, pixmap, &state);
if (butPtr->type == TYPE_BUTTON || !butPtr->indicatorOn) {
rect.top = butPtr->borderWidth + 1 + defaultWidth;
rect.left = rect.top;
rect.right = Tk_Width(tkwin) - rect.left;
rect.bottom = Tk_Height(tkwin) - rect.top;
} else {
rect.top = y-1 + textYOffset;
rect.left = x-1 + textXOffset;
rect.right = x+butPtr->textWidth + 1 + textXOffset;
rect.bottom = y+butPtr->textHeight + 2 + textYOffset;
}
SetTextColor(dc, gc->foreground);
SetBkColor(dc, gc->background);
DrawFocusRect(dc, &rect);
TkWinReleaseDrawableDC(pixmap, dc, &state);
}
y += height/2;
/*
* Draw the indicator for check buttons and radio buttons. At this point x
* and y refer to the top-left corner of the text or image or bitmap.
*/
if ((butPtr->type >= TYPE_CHECK_BUTTON) && butPtr->indicatorOn
&& tsdPtr->boxesPtr) {
int xSrc, ySrc;
x -= butPtr->indicatorSpace;
y -= butPtr->indicatorDiameter / 2;
xSrc = (butPtr->flags & (SELECTED|TRISTATED)) ? tsdPtr->boxWidth : 0;
if (butPtr->state == STATE_ACTIVE) {
xSrc += tsdPtr->boxWidth*2;
}
ySrc = (butPtr->type == TYPE_RADIO_BUTTON) ? 0 : tsdPtr->boxHeight;
/*
* Update the palette in the boxes bitmap to reflect the current
* button colors. Note that this code relies on the layout of the
* bitmap's palette. Also, all of the colors used to draw the bitmap
* must be in the palette that is selected into the DC of the
* offscreen pixmap. This requires that the static colors be placed
* into the palette.
*/
if ((butPtr->state == STATE_DISABLED)
&& (butPtr->disabledFg == NULL)) {
boxesPalette[PAL_CHECK] = FlipColor(TkWinGetBorderPixels(tkwin,
border, TK_3D_DARK_GC));
} else {
boxesPalette[PAL_CHECK] = FlipColor(gc->foreground);
}
boxesPalette[PAL_TOP_OUTER] = FlipColor(TkWinGetBorderPixels(tkwin,
border, TK_3D_DARK_GC));
boxesPalette[PAL_TOP_INNER] = FlipColor(TkWinGetBorderPixels(tkwin,
border, TK_3D_DARK2));
boxesPalette[PAL_BOTTOM_INNER] = FlipColor(TkWinGetBorderPixels(tkwin,
border, TK_3D_LIGHT2));
boxesPalette[PAL_BOTTOM_OUTER] = FlipColor(TkWinGetBorderPixels(tkwin,
border, TK_3D_LIGHT_GC));
if ((butPtr->state == STATE_DISABLED) || (butPtr->flags & TRISTATED)) {
boxesPalette[PAL_INTERIOR] = FlipColor(TkWinGetBorderPixels(tkwin,
border, TK_3D_LIGHT2));
} else if (butPtr->selectBorder != NULL) {
boxesPalette[PAL_INTERIOR] = FlipColor(TkWinGetBorderPixels(tkwin,
butPtr->selectBorder, TK_3D_FLAT_GC));
} else {
boxesPalette[PAL_INTERIOR] = FlipColor(GetSysColor(COLOR_WINDOW));
}
boxesPalette[PAL_BACKGROUND] = FlipColor(TkWinGetBorderPixels(tkwin,
border, TK_3D_FLAT_GC));
dc = TkWinGetDrawableDC(butPtr->display, pixmap, &state);
StretchDIBits(dc, x, y, (int)tsdPtr->boxWidth, (int)tsdPtr->boxHeight,
xSrc, ySrc, (int)tsdPtr->boxWidth, (int)tsdPtr->boxHeight,
tsdPtr->boxesBits, (LPBITMAPINFO) tsdPtr->boxesPtr,
DIB_RGB_COLORS, SRCCOPY);
TkWinReleaseDrawableDC(pixmap, dc, &state);
}
/*
* If the button is disabled with a stipple rather than a special
* foreground color, generate the stippled effect. If the widget is
* selected and we use a different background color when selected, must
* temporarily modify the GC so the stippling is the right color.
*/
if ((butPtr->state == STATE_DISABLED)
&& ((butPtr->disabledFg == NULL) || (butPtr->image != NULL))) {
if ((butPtr->flags & SELECTED) && !butPtr->indicatorOn
&& (butPtr->selectBorder != NULL)) {
XSetForeground(butPtr->display, butPtr->stippleGC,
Tk_3DBorderColor(butPtr->selectBorder)->pixel);
}
/*
* Stipple the whole button if no disabledFg was specified, otherwise
* restrict stippling only to displayed image
*/
if (butPtr->disabledFg == NULL) {
XFillRectangle(butPtr->display, pixmap, butPtr->stippleGC, 0, 0,
(unsigned) Tk_Width(tkwin), (unsigned) Tk_Height(tkwin));
} else {
XFillRectangle(butPtr->display, pixmap, butPtr->stippleGC,
imageXOffset, imageYOffset,
(unsigned) imageWidth, (unsigned) imageHeight);
}
if ((butPtr->flags & SELECTED) && !butPtr->indicatorOn
&& (butPtr->selectBorder != NULL)) {
XSetForeground(butPtr->display, butPtr->stippleGC,
Tk_3DBorderColor(butPtr->normalBorder)->pixel);
}
}
/*
* Draw the border and traversal highlight last. This way, if the button's
* contents overflow they'll be covered up by the border.
*/
if (relief != TK_RELIEF_FLAT) {
Tk_Draw3DRectangle(tkwin, pixmap, border,
defaultWidth, defaultWidth,
Tk_Width(tkwin) - 2*defaultWidth,
Tk_Height(tkwin) - 2*defaultWidth,
butPtr->borderWidth, relief);
}
if (defaultWidth != 0) {
dc = TkWinGetDrawableDC(butPtr->display, pixmap, &state);
TkWinFillRect(dc, 0, 0, Tk_Width(tkwin), defaultWidth,
(int) butPtr->highlightColorPtr->pixel);
TkWinFillRect(dc, 0, 0, defaultWidth, Tk_Height(tkwin),
(int) butPtr->highlightColorPtr->pixel);
TkWinFillRect(dc, 0, Tk_Height(tkwin) - defaultWidth,
Tk_Width(tkwin), defaultWidth,
(int) butPtr->highlightColorPtr->pixel);
TkWinFillRect(dc, Tk_Width(tkwin) - defaultWidth, 0,
defaultWidth, Tk_Height(tkwin),
(int) butPtr->highlightColorPtr->pixel);
TkWinReleaseDrawableDC(pixmap, dc, &state);
}
if (butPtr->flags & GOT_FOCUS) {
Tk_SetCaretPos(tkwin, x, y, 0 /* not used */);
}
/*
* Copy the information from the off-screen pixmap onto the screen, then
* delete the pixmap.
*/
XCopyArea(butPtr->display, pixmap, Tk_WindowId(tkwin),
butPtr->copyGC, 0, 0, (unsigned) Tk_Width(tkwin),
(unsigned) Tk_Height(tkwin), 0, 0);
Tk_FreePixmap(butPtr->display, pixmap);
}
/*
*----------------------------------------------------------------------
*
* TkpComputeButtonGeometry --
*
* After changes in a button's text or bitmap, this procedure recomputes
* the button's geometry and passes this information along to the
* geometry manager for the window.
*
* Results:
* None.
*
* Side effects:
* The button's window may change size.
*
*----------------------------------------------------------------------
*/
void
TkpComputeButtonGeometry(
register TkButton *butPtr) /* Button whose geometry may have changed. */
{
int txtWidth, txtHeight; /* Width and height of text */
int imgWidth, imgHeight; /* Width and height of image */
int width = 0, height = 0; /* Width and height of button */
int haveImage, haveText;
int avgWidth;
int minWidth;
/* Vertical and horizontal dialog units size in pixels. */
double vDLU, hDLU;
Tk_FontMetrics fm;
ThreadSpecificData *tsdPtr = (ThreadSpecificData *)
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));
if (butPtr->highlightWidth < 0) {
butPtr->highlightWidth = 0;
}
butPtr->inset = butPtr->highlightWidth + butPtr->borderWidth;
butPtr->indicatorSpace = 0;
if (!tsdPtr->boxesPtr) {
InitBoxes();
}
/*
* Figure out image metrics.
*/
if (butPtr->image != NULL) {
Tk_SizeOfImage(butPtr->image, &imgWidth, &imgHeight);
haveImage = 1;
} else if (butPtr->bitmap != None) {
Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap,
&imgWidth, &imgHeight);
haveImage = 1;
} else {
imgWidth = 0;
imgHeight = 0;
haveImage = 0;
}
/*
* Figure out font metrics (even if we don't have text because we need
* DLUs (based on font, not text) for some spacing calculations below).
*/
Tk_FreeTextLayout(butPtr->textLayout);
butPtr->textLayout = Tk_ComputeTextLayout(butPtr->tkfont,
Tcl_GetString(butPtr->textPtr), -1, butPtr->wrapLength,
butPtr->justify, 0, &butPtr->textWidth, &butPtr->textHeight);
txtWidth = butPtr->textWidth;
txtHeight = butPtr->textHeight;
haveText = (*(Tcl_GetString(butPtr->textPtr)) != '\0');
avgWidth = (Tk_TextWidth(butPtr->tkfont,
"abcdefghijklmnopqurstuvwzyABCDEFGHIJKLMNOPQURSTUVWZY",
52) + 26) / 52;
Tk_GetFontMetrics(butPtr->tkfont, &fm);
/*
* Compute dialog units for layout calculations.
*/
hDLU = avgWidth / 4.0;
vDLU = fm.linespace / 8.0;
/*
* First, let's try to compute button size "by the book" (See "Microsoft
* Windows User Experience" (ISBN 0-7356-0566-1), Chapter 14 - Visual
* Design, Section 4 - Layout (page 448)).
*
* Note, that Tk "buttons" are Microsoft "Command buttons", Tk
* "checkbuttons" are Microsoft "check boxes", Tk "radiobuttons" are
* Microsoft "option buttons", and Tk "labels" are Microsoft "text
* labels".
*/
/*
* Set width and height by button type; See User Experience table, p449.
* These are text-based measurements, even if the text is "". If there is
* an image, height will get set again later.
*/
switch (butPtr->type) {
case TYPE_BUTTON:
/*
* First compute the minimum width of the button in characters. MWUE
* says that the button should be 50 DLUs. We allow 6 DLUs padding
* left and right. (There is no rule but this is consistent with the
* fact that button text is 8 DLUs high and buttons are 14 DLUs high.)
*
* The width is specified in characters. A character is, by
* definition, 4 DLUs wide. 11 char * 4 DLU is 44 DLU + 6 DLU padding
* = 50 DLU. Therefore, width = -11 -> MWUE compliant buttons.
*/
if (butPtr->width < 0) {
minWidth = -(butPtr->width); /* Min width in chars */
width = avgWidth * minWidth; /* Allow for characters */
width += (int)(0.5 + (6 * hDLU)); /* Add for padding */
}
/*
* If shrink-wrapping was requested (width = 0) or if the text is
* wider than the default button width, adjust the button width up to
* suit.
*/
if (butPtr->width == 0
|| (txtWidth + (int)(0.5 + (6 * hDLU)) > width)) {
width = txtWidth + (int)(0.5 + (6 * hDLU));
}
/*
* The User Experience says 14 DLUs. Since text is, by definition, 8
* DLU/line, this allows for multi-line text while working perfectly
* for single-line text.
*/
height = txtHeight + (int)(0.5 + (6 * vDLU));
/*
* The above includes 6 DLUs of padding which should include defaults
* of 1 pixel of highlightwidth, 2 pixels of borderwidth, 1 pixel of
* padding and 1 pixel of extra inset on each side. Those will be
* added later so reduce width and height now to compensate.
*/
width -= 10;
height -= 10;
if (!haveImage) {
/*
* Extra inset for the focus ring.
*/
butPtr->inset += 1;
}
break;
case TYPE_LABEL:
/*
* The User Experience says, "as wide as needed".
*/
width = txtWidth;
/*
* The User Experience says, "8 (DLUs) per line of text". Since text
* is, by definition, 8 DLU/line, this allows for multi-line text
* while working perfectly for single-line text.
*/
if (txtHeight) {
height = txtHeight;
} else {
/*
* If there's no text, we want the height to be one linespace.
*/
height = fm.linespace;
}
break;
case TYPE_RADIO_BUTTON:
case TYPE_CHECK_BUTTON: {
/*
* See note for TYPE_LABEL.
*/
width = txtWidth;
/*
* The User Experience says 10 DLUs. (Is that one DLU above and below
* for the focus ring?) See note above about multi-line text and 8
* DLU/line.
*/
height = txtHeight + (int)(0.5 + (2.0 * vDLU));
/*
* The above includes 2 DLUs of padding which should include defaults
* of 1 pixel of highlightwidth, 0 pixels of borderwidth, and 1 pixel
* of padding on each side. Those will be added later so reduce height
* now to compensate.
*/
height -= 4;