implement TIP11, -compound option for menubutton widget

1 files changed, 201 insertions, 60 deletions

diff --git a/unix/tkUnixMenubu.c b/unix/tkUnixMenubu.c
index 8e46f46..186bd75 100644
--- a/unix/tkUnixMenubu.c
+++ b/unix/tkUnixMenubu.c
@@ -9,7 +9,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tkUnixMenubu.c,v 1.5 2000/11/22 01:49:38 ericm Exp $
+ * RCS: @(#) $Id: tkUnixMenubu.c,v 1.6 2001/05/21 14:07:33 tmh Exp $
  */
 
 #include "tkMenubutton.h"
@@ -74,9 +74,11 @@ TkpDisplayMenuButton(clientData)
     Pixmap pixmap;
     int x = 0;			/* Initialization needed only to stop
 				 * compiler warning. */
-    int y;
+    int y = 0;
     register Tk_Window tkwin = mbPtr->tkwin;
-    int width, height;
+    int width, height, fullWidth, fullHeight;
+    int imageXOffset, imageYOffset, textXOffset, textYOffset;
+    int haveImage = 0, haveText = 0;
 
     mbPtr->flags &= ~REDRAW_PENDING;
     if ((mbPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
@@ -95,6 +97,15 @@ TkpDisplayMenuButton(clientData)
 	border = mbPtr->normalBorder;
     }
 
+    if (mbPtr->image != None) {
+	Tk_SizeOfImage(mbPtr->image, &width, &height);
+	haveImage = 1;
+    } else if (mbPtr->bitmap != None) {
+	Tk_SizeOfBitmap(mbPtr->display, mbPtr->bitmap, &width, &height);
+	haveImage = 1;
+    }
+    haveText = (mbPtr->textWidth != 0 && mbPtr->textHeight != 0);
+
     /*
      * In order to avoid screen flashes, this procedure redraws
      * the menu button in a pixmap, then copies the pixmap to the
@@ -107,34 +118,105 @@ TkpDisplayMenuButton(clientData)
     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.
-     */
+    imageXOffset = 0;
+    imageYOffset = 0;
+    textXOffset = 0;
+    textYOffset = 0;
+    fullWidth = 0;
+    fullHeight = 0;
 
-    if (mbPtr->image != None) {
-	Tk_SizeOfImage(mbPtr->image, &width, &height);
+    if (mbPtr->compound != COMPOUND_NONE && haveImage && haveText) {
 
-	imageOrBitmap:
-	TkComputeAnchor(mbPtr->anchor, tkwin, 0, 0, 
-		width + mbPtr->indicatorWidth, height, &x, &y);
-	if (mbPtr->image != NULL) {
-	    Tk_RedrawImage(mbPtr->image, 0, 0, width, height, pixmap,
-		    x, y);
-	} else {
-	    XCopyPlane(mbPtr->display, mbPtr->bitmap, pixmap,
-		    gc, 0, 0, (unsigned) width, (unsigned) height, x, y, 1);
-	}
-    } else if (mbPtr->bitmap != None) {
-	Tk_SizeOfBitmap(mbPtr->display, mbPtr->bitmap, &width, &height);
-	goto imageOrBitmap;
+        switch ((enum compound) mbPtr->compound) {
+            case COMPOUND_TOP:
+            case COMPOUND_BOTTOM: {
+                /* Image is above or below text */
+                if (mbPtr->compound == COMPOUND_TOP) {
+                    textYOffset = height + mbPtr->padY;
+                } else {
+                    imageYOffset = mbPtr->textHeight + mbPtr->padY;
+                }
+                fullHeight = height + mbPtr->textHeight + mbPtr->padY;
+                fullWidth = (width > mbPtr->textWidth ? width :
+                        mbPtr->textWidth);
+                textXOffset = (fullWidth - mbPtr->textWidth)/2;
+                imageXOffset = (fullWidth - width)/2;
+                break;
+            }
+            case COMPOUND_LEFT:
+            case COMPOUND_RIGHT: {
+                /* Image is left or right of text */
+                if (mbPtr->compound == COMPOUND_LEFT) {
+                    textXOffset = width + mbPtr->padX;
+                } else {
+                    imageXOffset = mbPtr->textWidth + mbPtr->padX;
+                }
+                fullWidth = mbPtr->textWidth + mbPtr->padX + width;
+                fullHeight = (height > mbPtr->textHeight ? height :
+                        mbPtr->textHeight);
+                textYOffset = (fullHeight - mbPtr->textHeight)/2;
+                imageYOffset = (fullHeight - height)/2;
+                break;
+            }
+            case COMPOUND_CENTER: {
+                /* Image and text are superimposed */
+                fullWidth = (width > mbPtr->textWidth ? width :
+                        mbPtr->textWidth);
+                fullHeight = (height > mbPtr->textHeight ? height :
+                        mbPtr->textHeight);
+                textXOffset = (fullWidth - mbPtr->textWidth)/2;
+                imageXOffset = (fullWidth - width)/2;
+                textYOffset = (fullHeight - mbPtr->textHeight)/2;
+                imageYOffset = (fullHeight - height)/2;
+                break;
+            }
+            case COMPOUND_NONE: {break;}
+        }
+
+        TkComputeAnchor(mbPtr->anchor, tkwin, 0, 0,
+                mbPtr->indicatorWidth + fullWidth, fullHeight,
+		&x, &y);
+
+        if (mbPtr->image != NULL) {
+            Tk_RedrawImage(mbPtr->image, 0, 0, width, height, pixmap,
+                    x + imageXOffset, y + imageYOffset);
+        }
+        if (mbPtr->bitmap != None) {
+            XCopyPlane(mbPtr->display, mbPtr->bitmap, pixmap,
+                    gc, 0, 0, (unsigned) width, (unsigned) height, 
+		    x + imageXOffset, y + imageYOffset, 1);
+        }
+        if (haveText) {
+            Tk_DrawTextLayout(mbPtr->display, pixmap, gc, mbPtr->textLayout, 
+		    x  + textXOffset, y + textYOffset ,
+                    0, -1);
+            Tk_UnderlineTextLayout(mbPtr->display, pixmap, gc, 
+		    mbPtr->textLayout, x + textXOffset, y + textYOffset ,
+		    mbPtr->underline);
+        }
     } else {
-	TkComputeAnchor(mbPtr->anchor, tkwin, mbPtr->padX, mbPtr->padY,
-		mbPtr->textWidth + mbPtr->indicatorWidth,
-		mbPtr->textHeight, &x, &y);
-	Tk_DrawTextLayout(mbPtr->display, pixmap, gc, mbPtr->textLayout, x, y,
-		0, -1);
-	Tk_UnderlineTextLayout(mbPtr->display, pixmap, gc, mbPtr->textLayout,
-		x, y, mbPtr->underline);
+       if (mbPtr->image != NULL) {
+           TkComputeAnchor(mbPtr->anchor, tkwin, 0, 0,
+                   width + mbPtr->indicatorWidth, height, &x, &y);
+           Tk_RedrawImage(mbPtr->image, 0, 0, width, height, pixmap,
+                   x + imageXOffset, y + imageYOffset);
+       } else if (mbPtr->bitmap != None) {
+           TkComputeAnchor(mbPtr->anchor, tkwin, 0, 0,
+                   width + mbPtr->indicatorWidth, height, &x, &y);
+           XCopyPlane(mbPtr->display, mbPtr->bitmap, pixmap,
+                   gc, 0, 0, (unsigned) width, (unsigned) height, 
+		   x + imageXOffset, y + imageYOffset, 1);
+       } else {
+           TkComputeAnchor(mbPtr->anchor, tkwin, mbPtr->padX, mbPtr->padY,
+                   mbPtr->textWidth + mbPtr->indicatorWidth,
+                   mbPtr->textHeight, &x, &y);
+           Tk_DrawTextLayout(mbPtr->display, pixmap, gc, mbPtr->textLayout, 
+		   x  + textXOffset, y + textYOffset ,
+                   0, -1);
+           Tk_UnderlineTextLayout(mbPtr->display, pixmap, gc, 
+		   mbPtr->textLayout, x + textXOffset, y + textYOffset ,
+		   mbPtr->underline);
+        }
     }
 
     /*
@@ -251,54 +333,113 @@ TkpComputeMenuButtonGeometry(mbPtr)
     TkMenuButton *mbPtr;	/* Widget record for menu button. */
 {
     int width, height, mm, pixels;
+    int  avgWidth, txtWidth, txtHeight;
+    int haveImage = 0, haveText = 0;
+    Tk_FontMetrics fm;
 
     mbPtr->inset = mbPtr->highlightWidth + mbPtr->borderWidth;
+
+    width = 0;
+    height = 0;
+    txtWidth = 0;
+    txtHeight = 0;
+    avgWidth = 0;
+
     if (mbPtr->image != None) {
 	Tk_SizeOfImage(mbPtr->image, &width, &height);
-	if (mbPtr->width > 0) {
-	    width = mbPtr->width;
-	}
-	if (mbPtr->height > 0) {
-	    height = mbPtr->height;
-	}
+	haveImage = 1;
     } else if (mbPtr->bitmap != None) {
 	Tk_SizeOfBitmap(mbPtr->display, mbPtr->bitmap, &width, &height);
-	if (mbPtr->width > 0) {
-	    width = mbPtr->width;
-	}
-	if (mbPtr->height > 0) {
-	    height = mbPtr->height;
-	}
-    } else {
+	haveImage = 1;
+    }
+
+    if (haveImage == 0 || mbPtr->compound != COMPOUND_NONE) {
 	Tk_FreeTextLayout(mbPtr->textLayout);
+
 	mbPtr->textLayout = Tk_ComputeTextLayout(mbPtr->tkfont, mbPtr->text,
 		-1, mbPtr->wrapLength, mbPtr->justify, 0, &mbPtr->textWidth,
 		&mbPtr->textHeight);
-	width = mbPtr->textWidth;
-	height = mbPtr->textHeight;
-	if (mbPtr->width > 0) {
-	    width = mbPtr->width * Tk_TextWidth(mbPtr->tkfont, "0", 1);
-	}
-	if (mbPtr->height > 0) {
-	    Tk_FontMetrics fm;
+	txtWidth = mbPtr->textWidth;
+	txtHeight = mbPtr->textHeight;
+        avgWidth = Tk_TextWidth(mbPtr->tkfont, "0", 1);
+        Tk_GetFontMetrics(mbPtr->tkfont, &fm);
+        haveText = (txtWidth != 0 && txtHeight != 0);
+    }
+
+    /*
+     * If the menubutton is compound (ie, it shows both an image and text),
+     * the new geometry is a combination of the image and text geometry.
+     * We only honor the compound bit if the menubutton has both text and
+     * an image, because otherwise it is not really a compound menubutton.
+     */
 
-	    Tk_GetFontMetrics(mbPtr->tkfont, &fm);
-	    height = mbPtr->height * fm.linespace;
+    if (mbPtr->compound != COMPOUND_NONE && haveImage && haveText) {
+        switch ((enum compound) mbPtr->compound) {
+            case COMPOUND_TOP:
+            case COMPOUND_BOTTOM: {
+                /* Image is above or below text */
+                height += txtHeight + mbPtr->padY;
+                width = (width > txtWidth ? width : txtWidth);
+                break;
+            }
+            case COMPOUND_LEFT:
+            case COMPOUND_RIGHT: {
+                /* Image is left or right of text */
+                width += txtWidth + mbPtr->padX;
+                height = (height > txtHeight ? height : txtHeight);
+                break;
+            }
+            case COMPOUND_CENTER: {
+                /* Image and text are superimposed */
+                width = (width > txtWidth ? width : txtWidth);
+                height = (height > txtHeight ? height : txtHeight);
+                break;
+            }
+            case COMPOUND_NONE: {break;}
+        }
+        if (mbPtr->width > 0) {
+            width = mbPtr->width;
+        }
+        if (mbPtr->height > 0) {
+            height = mbPtr->height;
+        }
+        width += 2*mbPtr->padX;
+        height += 2*mbPtr->padY;
+    } else {
+	if (haveImage) {
+            if (mbPtr->width > 0) {
+                width = mbPtr->width;
+            }
+            if (mbPtr->height > 0) {
+                height = mbPtr->height;
+            }
+	} else {
+	    width = txtWidth;
+	    height = txtHeight;
+            if (mbPtr->width > 0) {
+                width = mbPtr->width * avgWidth;
+            }
+            if (mbPtr->height > 0) {
+                height = mbPtr->height * fm.linespace;
+            }
 	}
-	width += 2*mbPtr->padX;
-	height += 2*mbPtr->padY;
+    }
+
+    if (! haveImage) {
+        width += 2*mbPtr->padX;
+        height += 2*mbPtr->padY;
     }
 
     if (mbPtr->indicatorOn) {
-	mm = WidthMMOfScreen(Tk_Screen(mbPtr->tkwin));
-	pixels = WidthOfScreen(Tk_Screen(mbPtr->tkwin));
-	mbPtr->indicatorHeight= (INDICATOR_HEIGHT * pixels)/(10*mm);
-	mbPtr->indicatorWidth = (INDICATOR_WIDTH * pixels)/(10*mm)
-		+ 2*mbPtr->indicatorHeight;
-	width += mbPtr->indicatorWidth;
+        mm = WidthMMOfScreen(Tk_Screen(mbPtr->tkwin));
+        pixels = WidthOfScreen(Tk_Screen(mbPtr->tkwin));
+        mbPtr->indicatorHeight= (INDICATOR_HEIGHT * pixels)/(10*mm);
+        mbPtr->indicatorWidth = (INDICATOR_WIDTH * pixels)/(10*mm)
+    	    + 2*mbPtr->indicatorHeight;
+        width += mbPtr->indicatorWidth;
     } else {
-	mbPtr->indicatorHeight = 0;
-	mbPtr->indicatorWidth = 0;
+        mbPtr->indicatorHeight = 0;
+        mbPtr->indicatorWidth = 0;
     }
 
     Tk_GeometryRequest(mbPtr->tkwin, (int) (width + 2*mbPtr->inset),