* Added CharacterView::ScrollToCharacter(), and IsCharacterVisible().

* On text drops, the character map is now scrolling to the first character
  dropped. This is helpful to see the code of a character as well as the block
  it is contained in.
* Fixed a bug in CharacterView::_FrameFor() that would not return the correct
  vertical position.
* Made a few methods const.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@38863 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/charactermap/CharacterView.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2009, Axel Dörfler, axeld@pinc-software.de. All rights reserved.
+ * Copyright 2009-2010, Axel Dörfler, axeld@pinc-software.de.
  * Distributed under the terms of the MIT License.
  */
 
@@ -114,6 +114,24 @@ CharacterView::ScrollToBlock(int32 blockIndex)
 }
 
 
+void
+CharacterView::ScrollToCharacter(uint32 c)
+{
+	if (IsCharacterVisible(c))
+		return;
+
+	BRect frame = _FrameFor(c);
+	BView::ScrollTo(0.0f, frame.top);
+}
+
+
+bool
+CharacterView::IsCharacterVisible(uint32 c) const
+{
+	return Bounds().Contains(_FrameFor(c));
+}
+
+
 /*static*/ void
 CharacterView::UnicodeToUTF8(uint32 c, char* text, size_t textSize)
 {
@@ -424,7 +442,7 @@ CharacterView::DoLayout()
 
 
 int32
-CharacterView::_BlockAt(BPoint point)
+CharacterView::_BlockAt(BPoint point) const
 {
 	// TODO: use binary search
 	for (uint32 i = 0; i < kNumUnicodeBlocks; i++) {
@@ -441,7 +459,8 @@ CharacterView::_BlockAt(BPoint point)
 
 
 bool
-CharacterView::_GetCharacterAt(BPoint point, uint32& character, BRect* _frame)
+CharacterView::_GetCharacterAt(BPoint point, uint32& character,
+	BRect* _frame) const
 {
 	int32 i = _BlockAt(point);
 	if (i == -1)
@@ -569,7 +588,7 @@ CharacterView::_UpdateSize()
 
 
 bool
-CharacterView::_GetTopmostCharacter(uint32& character, int32& offset)
+CharacterView::_GetTopmostCharacter(uint32& character, int32& offset) const
 {
 	int32 top = (int32)Bounds().top;
 
@@ -594,7 +613,7 @@ CharacterView::_GetTopmostCharacter(uint32& character, int32& offset)
 
 
 BRect
-CharacterView::_FrameFor(uint32 character)
+CharacterView::_FrameFor(uint32 character) const
 {
 	// find block containing the character
 
@@ -609,7 +628,8 @@ CharacterView::_FrameFor(uint32 character)
 		}
 
 		int32 diff = character - kUnicodeBlocks[i].start;
-		int32 y = fTitleTops[i] + fTitleHeight + diff / fCharactersPerLine;
+		int32 y = fTitleTops[i] + fTitleHeight
+			+ (diff / fCharactersPerLine) * fCharacterHeight;
 		int32 x = fGap / 2 + diff % fCharactersPerLine;
 
 		return BRect(x, y, x + fCharacterWidth + fGap, y + fCharacterHeight);

src/apps/charactermap/CharacterView.h

@@ -31,6 +31,8 @@ public:
 			bool			IsShowingBlock(int32 blockIndex) const;
 
 			void			ScrollToBlock(int32 blockIndex);
+			void			ScrollToCharacter(uint32 c);
+			bool			IsCharacterVisible(uint32 c) const;
 
 	static	void			UnicodeToUTF8(uint32 c, char* text,
 								size_t textSize);
@@ -56,14 +58,14 @@ protected:
 	virtual void			DoLayout();
 
 private:
-			int32			_BlockAt(BPoint point);
+			int32			_BlockAt(BPoint point) const;
 			bool 			_GetCharacterAt(BPoint point, uint32& character,
-								BRect* _frame = NULL);
+								BRect* _frame = NULL) const;
 			void			_UpdateFontSize();
 			void			_UpdateSize();
 			bool			_GetTopmostCharacter(uint32& character,
-								int32& offset);
+								int32& offset) const;
-			BRect			_FrameFor(uint32 character);
+			BRect			_FrameFor(uint32 character) const;
 			void			_CopyToClipboard(const char* text);
 
 private:

src/apps/charactermap/CharacterWindow.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright 2009, Axel Dörfler, axeld@pinc-software.de.
+ * Copyright 2009-2010, Axel Dörfler, axeld@pinc-software.de.
  * Distributed under the terms of the MIT License.
  */
 
@@ -26,6 +26,7 @@
 #include <SplitLayoutBuilder.h>
 #include <StringView.h>
 #include <TextControl.h>
+#include <UnicodeChar.h>
 
 #include "CharacterView.h"
 #include "UnicodeBlockView.h"
@@ -256,6 +257,20 @@ CharacterWindow::~CharacterWindow()
 void
 CharacterWindow::MessageReceived(BMessage* message)
 {
+	if (message->WasDropped()) {
+		const char* text;
+		ssize_t size;
+		uint32 c;
+		if (message->FindInt32("character", (int32*)&c) == B_OK) {
+			fCharacterView->ScrollToCharacter(c);
+			return;
+		} else if (message->FindData("text/plain", B_MIME_TYPE,
+				(const void**)&text, &size) == B_OK) {
+			fCharacterView->ScrollToCharacter(BUnicodeChar::FromUTF8(text));
+			return;
+		}
+	}
+
 	switch (message->what) {
 		case B_COPY:
 			PostMessage(message, fCharacterView);

src/apps/charactermap/Jamfile

@@ -11,6 +11,6 @@ Application CharacterMap :
 	UnicodeBlocks.cpp
 	UnicodeBlockView.cpp
 
-	: be $(TARGET_LIBSUPC++)
+	: be locale $(TARGET_LIBSUPC++)
 	: CharacterMap.rdef
 	;