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authorrjohnson <rjohnson@noemail.net>1998-04-01 09:51:45 (GMT)
committerrjohnson <rjohnson@noemail.net>1998-04-01 09:51:45 (GMT)
commit9c5b7f2b7e472536ed2e7c915ead05e2aa264182 (patch)
tree8fb30cb152c4dc191be47fa043d2e6f5ea38c7ba /win/tkWinButton.c
parent1d0efcbe267f2c0eb73869862522fb20fb2d63ca (diff)
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Initial revision
FossilOrigin-Name: 2bf55ca9aa942b581137b9f474da5ad9c1480de4
Diffstat (limited to 'win/tkWinButton.c')
-rw-r--r--win/tkWinButton.c811
1 files changed, 811 insertions, 0 deletions
diff --git a/win/tkWinButton.c b/win/tkWinButton.c
new file mode 100644
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--- /dev/null
+++ b/win/tkWinButton.c
@@ -0,0 +1,811 @@
+/*
+ * tkWinButton.c --
+ *
+ * This file implements the Windows specific portion of the button
+ * widgets.
+ *
+ * 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: @(#) tkWinButton.c 1.12 97/09/02 13:18:27
+ */
+
+#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 (BS_OWNERDRAW | BS_PUSHBUTTON | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS)
+#define CHECK_STYLE (BS_OWNERDRAW | BS_CHECKBOX | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS)
+#define RADIO_STYLE (BS_OWNERDRAW | BS_RADIOBUTTON | WS_CHILD | WS_VISIBLE | WS_CLIPSIBLINGS)
+
+static DWORD buttonStyles[] = {
+ LABEL_STYLE, PUSH_STYLE, CHECK_STYLE, RADIO_STYLE
+};
+
+/*
+ * 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
+};
+
+/*
+ * Set to non-zero if this module is initialized.
+ */
+
+static int initialized = 0;
+
+/*
+ * Variables for the cached information about the boxes bitmap.
+ */
+
+static BITMAPINFOHEADER *boxesPtr = NULL; /* Information about the bitmap. */
+static DWORD *boxesPalette = NULL; /* Pointer to color palette. */
+static LPSTR boxesBits = NULL; /* Pointer to bitmap data. */
+static DWORD boxHeight = 0, boxWidth = 0; /* Size of each sub-image. */
+
+/*
+ * This variable holds the default border width for a button in string
+ * form for use in a Tk_ConfigSpec.
+ */
+
+static char defWidth[8];
+
+/*
+ * Declarations for functions defined in this file.
+ */
+
+static int ButtonBindProc _ANSI_ARGS_((ClientData clientData,
+ Tcl_Interp *interp, XEvent *eventPtr,
+ Tk_Window tkwin, KeySym keySym));
+static LRESULT CALLBACK ButtonProc _ANSI_ARGS_((HWND hwnd, UINT message,
+ WPARAM wParam, LPARAM lParam));
+static DWORD ComputeStyle _ANSI_ARGS_((WinButton* butPtr));
+static Window CreateProc _ANSI_ARGS_((Tk_Window tkwin,
+ Window parent, ClientData instanceData));
+static void InitBoxes _ANSI_ARGS_((void));
+static void UpdateButtonDefaults _ANSI_ARGS_((void));
+
+/*
+ * The class procedure table for the button widgets.
+ */
+
+TkClassProcs tkpButtonProcs = {
+ CreateProc, /* createProc. */
+ TkButtonWorldChanged, /* geometryProc. */
+ NULL /* modalProc. */
+};
+
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * 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()
+{
+ /*
+ * 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;
+
+ hrsrc = FindResource(module, "buttons", RT_BITMAP);
+ if (hrsrc) {
+ hblk = LoadResource(module, hrsrc);
+ boxesPtr = (LPBITMAPINFOHEADER)LockResource(hblk);
+ }
+
+ /*
+ * Copy the DIBitmap into writable memory.
+ */
+
+ if (boxesPtr != NULL && !(boxesPtr->biWidth % 4)
+ && !(boxesPtr->biHeight % 2)) {
+ size = boxesPtr->biSize + (1 << boxesPtr->biBitCount) * sizeof(RGBQUAD)
+ + boxesPtr->biSizeImage;
+ newBitmap = (LPBITMAPINFOHEADER) ckalloc(size);
+ memcpy(newBitmap, boxesPtr, size);
+ boxesPtr = newBitmap;
+ boxWidth = boxesPtr->biWidth / 4;
+ boxHeight = boxesPtr->biHeight / 2;
+ boxesPalette = (DWORD*) (((LPSTR)boxesPtr) + boxesPtr->biSize);
+ boxesBits = ((LPSTR)boxesPalette)
+ + ((1 << boxesPtr->biBitCount) * sizeof(RGBQUAD));
+ } else {
+ boxesPtr = NULL;
+ }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * UpdateButtonDefaults --
+ *
+ * This function retrieves the current system defaults for
+ * the button widgets.
+ *
+ * Results:
+ * None.
+ *
+ * Side effects:
+ * Updates the configuration defaults for buttons.
+ *
+ *----------------------------------------------------------------------
+ */
+
+void
+UpdateButtonDefaults()
+{
+ Tk_ConfigSpec *specPtr;
+ int width = GetSystemMetrics(SM_CXEDGE);
+
+ if (width == 0) {
+ width = 1;
+ }
+ sprintf(defWidth, "%d", width);
+ for (specPtr = tkpButtonConfigSpecs; specPtr->type != TK_CONFIG_END;
+ specPtr++) {
+ if (specPtr->offset == Tk_Offset(TkButton, borderWidth)) {
+ specPtr->defValue = defWidth;
+ }
+ }
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TkpCreateButton --
+ *
+ * Allocate a new TkButton structure.
+ *
+ * Results:
+ * Returns a newly allocated TkButton structure.
+ *
+ * Side effects:
+ * Registers an event handler for the widget.
+ *
+ *----------------------------------------------------------------------
+ */
+
+TkButton *
+TkpCreateButton(tkwin)
+ Tk_Window tkwin;
+{
+ WinButton *butPtr;
+
+ if (!initialized) {
+ UpdateButtonDefaults();
+ initialized = 1;
+ }
+
+ 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(tkwin, parentWin, instanceData)
+ 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)SetWindowLong(butPtr->hwnd, GWL_WNDPROC,
+ (DWORD) 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(butPtr)
+ TkButton *butPtr;
+{
+ WinButton *winButPtr = (WinButton *)butPtr;
+ HWND hwnd = winButPtr->hwnd;
+ if (hwnd) {
+ SetWindowLong(hwnd, GWL_WNDPROC, (DWORD) 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 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, height;
+ 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. */
+
+ butPtr->flags &= ~REDRAW_PENDING;
+ if ((butPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
+ return;
+ }
+
+ border = butPtr->normalBorder;
+ if ((butPtr->state == tkDisabledUid) && (butPtr->disabledFg != NULL)) {
+ gc = butPtr->disabledGC;
+ } else if ((butPtr->state == tkActiveUid)
+ && !Tk_StrictMotif(butPtr->tkwin)) {
+ gc = butPtr->activeTextGC;
+ border = butPtr->activeBorder;
+ } else {
+ gc = butPtr->normalTextGC;
+ }
+ if ((butPtr->flags & SELECTED) && (butPtr->state != tkActiveUid)
+ && (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.
+ */
+
+ relief = butPtr->relief;
+ if ((butPtr->type >= TYPE_CHECK_BUTTON) && !butPtr->indicatorOn) {
+ relief = (butPtr->flags & SELECTED) ? TK_RELIEF_SUNKEN
+ : TK_RELIEF_RAISED;
+ }
+
+ /*
+ * Compute width of default ring and offset for pushed buttons.
+ */
+
+ if (butPtr->type == TYPE_BUTTON) {
+ defaultWidth = ((butPtr->defaultState == tkActiveUid)
+ ? 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);
+
+ imageOrBitmap:
+ TkComputeAnchor(butPtr->anchor, tkwin, 0, 0,
+ butPtr->indicatorSpace + width, height, &x, &y);
+ x += butPtr->indicatorSpace;
+
+ if (relief == TK_RELIEF_SUNKEN) {
+ x += offset;
+ y += offset;
+ }
+ if (butPtr->image != NULL) {
+ if ((butPtr->selectImage != NULL) && (butPtr->flags & SELECTED)) {
+ Tk_RedrawImage(butPtr->selectImage, 0, 0, width, height,
+ pixmap, x, y);
+ } else {
+ Tk_RedrawImage(butPtr->image, 0, 0, width, height, pixmap,
+ x, y);
+ }
+ } 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);
+ }
+ y += height/2;
+ } else if (butPtr->bitmap != None) {
+ Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, &width, &height);
+ goto imageOrBitmap;
+ } else {
+ RECT rect;
+ 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;
+ }
+ Tk_DrawTextLayout(butPtr->display, pixmap, gc, butPtr->textLayout,
+ x, y, 0, -1);
+ Tk_UnderlineTextLayout(butPtr->display, pixmap, gc,
+ butPtr->textLayout, x, y, butPtr->underline);
+
+ /*
+ * 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.
+ */
+
+ if (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-2;
+ rect.left = x-2;
+ rect.right = x+butPtr->textWidth + 1;
+ rect.bottom = y+butPtr->textHeight + 1;
+ }
+ SetTextColor(dc, gc->foreground);
+ SetBkColor(dc, gc->background);
+ DrawFocusRect(dc, &rect);
+ TkWinReleaseDrawableDC(pixmap, dc, &state);
+ }
+ y += butPtr->textHeight/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
+ && boxesPtr) {
+ int xSrc, ySrc;
+
+ x -= butPtr->indicatorSpace;
+ y -= butPtr->indicatorDiameter / 2;
+
+ xSrc = (butPtr->flags & SELECTED) ? boxWidth : 0;
+ if (butPtr->state == tkActiveUid) {
+ xSrc += boxWidth*2;
+ }
+ ySrc = (butPtr->type == TYPE_RADIO_BUTTON) ? 0 : 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.
+ */
+
+ 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 == tkDisabledUid) {
+ 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, boxWidth, boxHeight, xSrc, ySrc,
+ boxWidth, boxHeight, boxesBits, (LPBITMAPINFO)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.
+ */
+
+ if ((butPtr->state == tkDisabledUid)
+ && ((butPtr->disabledFg == NULL) || (butPtr->image != NULL))) {
+ if ((butPtr->flags & SELECTED) && !butPtr->indicatorOn
+ && (butPtr->selectBorder != NULL)) {
+ XSetForeground(butPtr->display, butPtr->disabledGC,
+ Tk_3DBorderColor(butPtr->selectBorder)->pixel);
+ }
+ XFillRectangle(butPtr->display, pixmap, butPtr->disabledGC,
+ butPtr->inset, butPtr->inset,
+ (unsigned) (Tk_Width(tkwin) - 2*butPtr->inset),
+ (unsigned) (Tk_Height(tkwin) - 2*butPtr->inset));
+ if ((butPtr->flags & SELECTED) && !butPtr->indicatorOn
+ && (butPtr->selectBorder != NULL)) {
+ XSetForeground(butPtr->display, butPtr->disabledGC,
+ 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,
+ butPtr->highlightColorPtr->pixel);
+ TkWinFillRect(dc, 0, 0, defaultWidth, Tk_Height(tkwin),
+ butPtr->highlightColorPtr->pixel);
+ TkWinFillRect(dc, 0, Tk_Height(tkwin) - defaultWidth,
+ Tk_Width(tkwin), defaultWidth,
+ butPtr->highlightColorPtr->pixel);
+ TkWinFillRect(dc, Tk_Width(tkwin) - defaultWidth, 0,
+ defaultWidth, Tk_Height(tkwin),
+ butPtr->highlightColorPtr->pixel);
+ TkWinReleaseDrawableDC(pixmap, dc, &state);
+ }
+
+ /*
+ * 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(butPtr)
+ register TkButton *butPtr; /* Button whose geometry may have changed. */
+{
+ int width, height, avgWidth;
+ Tk_FontMetrics fm;
+
+ if (butPtr->highlightWidth < 0) {
+ butPtr->highlightWidth = 0;
+ }
+ butPtr->inset = butPtr->highlightWidth + butPtr->borderWidth;
+ butPtr->indicatorSpace = 0;
+
+ if (!boxesPtr) {
+ InitBoxes();
+ }
+
+ if (butPtr->image != NULL) {
+ Tk_SizeOfImage(butPtr->image, &width, &height);
+ imageOrBitmap:
+ if (butPtr->width > 0) {
+ width = butPtr->width;
+ }
+ if (butPtr->height > 0) {
+ height = butPtr->height;
+ }
+ if ((butPtr->type >= TYPE_CHECK_BUTTON) && butPtr->indicatorOn) {
+ butPtr->indicatorSpace = boxWidth * 2;
+ butPtr->indicatorDiameter = boxHeight;
+ }
+ } else if (butPtr->bitmap != None) {
+ Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, &width, &height);
+ goto imageOrBitmap;
+ } else {
+ Tk_FreeTextLayout(butPtr->textLayout);
+ butPtr->textLayout = Tk_ComputeTextLayout(butPtr->tkfont,
+ butPtr->text, -1, butPtr->wrapLength, butPtr->justify, 0,
+ &butPtr->textWidth, &butPtr->textHeight);
+
+ width = butPtr->textWidth;
+ height = butPtr->textHeight;
+ avgWidth = Tk_TextWidth(butPtr->tkfont, "0", 1);
+ Tk_GetFontMetrics(butPtr->tkfont, &fm);
+
+ if (butPtr->width > 0) {
+ width = butPtr->width * avgWidth;
+ }
+ if (butPtr->height > 0) {
+ height = butPtr->height * fm.linespace;
+ }
+
+ if ((butPtr->type >= TYPE_CHECK_BUTTON) && butPtr->indicatorOn) {
+ butPtr->indicatorDiameter = boxHeight;
+ butPtr->indicatorSpace = butPtr->indicatorDiameter + avgWidth;
+ }
+
+ /*
+ * Increase the inset to allow for the focus ring.
+ */
+
+ if (butPtr->type != TYPE_LABEL) {
+ butPtr->inset += 3;
+ }
+ }
+
+ /*
+ * When issuing the geometry request, add extra space for the indicator,
+ * if any, and for the border and padding, plus an extra pixel so the
+ * display can be offset by 1 pixel in either direction for the raised
+ * or lowered effect.
+ */
+
+ if ((butPtr->image == NULL) && (butPtr->bitmap == None)) {
+ width += 2*butPtr->padX;
+ height += 2*butPtr->padY;
+ }
+ if ((butPtr->type == TYPE_BUTTON)
+ || ((butPtr->type >= TYPE_CHECK_BUTTON) && !butPtr->indicatorOn)) {
+ width += 1;
+ height += 1;
+ }
+ Tk_GeometryRequest(butPtr->tkwin, (int) (width + butPtr->indicatorSpace
+ + 2*butPtr->inset), (int) (height + 2*butPtr->inset));
+ Tk_SetInternalBorder(butPtr->tkwin, butPtr->inset);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ButtonProc --
+ *
+ * This function is call by Windows whenever an event occurs on
+ * a button control created by Tk.
+ *
+ * Results:
+ * Standard Windows return value.
+ *
+ * Side effects:
+ * May generate events.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static LRESULT CALLBACK
+ButtonProc(hwnd, message, wParam, lParam)
+ HWND hwnd;
+ UINT message;
+ WPARAM wParam;
+ LPARAM lParam;
+{
+ LRESULT result;
+ WinButton *butPtr;
+ Tk_Window tkwin = Tk_HWNDToWindow(hwnd);
+
+ if (tkwin == NULL) {
+ panic("ButtonProc called on an invalid HWND");
+ }
+ butPtr = (WinButton *)((TkWindow*)tkwin)->instanceData;
+
+ switch(message) {
+ case WM_ERASEBKGND:
+ return 0;
+
+ case BM_GETCHECK:
+ if (((butPtr->info.type == TYPE_CHECK_BUTTON)
+ || (butPtr->info.type == TYPE_RADIO_BUTTON))
+ && butPtr->info.indicatorOn) {
+ return (butPtr->info.flags & SELECTED)
+ ? BST_CHECKED : BST_UNCHECKED;
+ }
+ return 0;
+
+ case BM_GETSTATE: {
+ DWORD state = 0;
+ if (((butPtr->info.type == TYPE_CHECK_BUTTON)
+ || (butPtr->info.type == TYPE_RADIO_BUTTON))
+ && butPtr->info.indicatorOn) {
+ state = (butPtr->info.flags & SELECTED)
+ ? BST_CHECKED : BST_UNCHECKED;
+ }
+ if (butPtr->info.flags & GOT_FOCUS) {
+ state |= BST_FOCUS;
+ }
+ return state;
+ }
+ case WM_ENABLE:
+ break;
+
+ case WM_PAINT: {
+ PAINTSTRUCT ps;
+ BeginPaint(hwnd, &ps);
+ EndPaint(hwnd, &ps);
+ TkpDisplayButton((ClientData)butPtr);
+ return 0;
+ }
+ case BN_CLICKED: {
+ int code;
+ Tcl_Interp *interp = butPtr->info.interp;
+ if (butPtr->info.state != tkDisabledUid) {
+ Tcl_Preserve((ClientData)interp);
+ code = TkInvokeButton((TkButton*)butPtr);
+ if (code != TCL_OK && code != TCL_CONTINUE
+ && code != TCL_BREAK) {
+ Tcl_AddErrorInfo(interp, "\n (button invoke)");
+ Tcl_BackgroundError(interp);
+ }
+ Tcl_Release((ClientData)interp);
+ }
+ Tcl_ServiceAll();
+ return 0;
+ }
+
+ default:
+ if (Tk_TranslateWinEvent(hwnd, message, wParam, lParam, &result)) {
+ return result;
+ }
+ }
+ return DefWindowProc(hwnd, message, wParam, lParam);
+}