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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "nsTriStateCheckboxFrame.h"
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#include "nsFormControlHelper.h"
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#include "nsIContent.h"
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#include "prtypes.h"
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#include "nsIFrame.h"
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#include "nsIAtom.h"
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#include "nsIPresContext.h"
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#include "nsHTMLAtoms.h"
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#include "nsIStyleContext.h"
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#include "nsStyleUtil.h"
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#include "nsIFormControl.h"
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#include "nsCSSRendering.h"
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#include "nsINameSpaceManager.h"
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//
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// NS_NewTriStateCheckboxFrame
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//
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// Wrapper for creating a new tristate checkbox
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//
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nsresult
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NS_NewTriStateCheckboxFrame(nsIFrame*& aResult)
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{
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aResult = new nsTriStateCheckboxFrame;
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if ( !aResult )
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return NS_ERROR_OUT_OF_MEMORY;
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return NS_OK;
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}
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//
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// nsTriStateCheckboxFrame cntr
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//
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nsTriStateCheckboxFrame::nsTriStateCheckboxFrame()
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: mMouseDownOnCheckbox(PR_FALSE)
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{
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}
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//
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// GetCurrentCheckState
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//
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// Looks in the DOM to find out what the value is. 0 is off, 1 is on, 2 is mixed.
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// This will default to "off" if no value is set in the DOM.
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//
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nsresult
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nsTriStateCheckboxFrame::GetCurrentCheckState(CheckState *outState)
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{
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nsString value;
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nsresult res = mContent->GetAttribute ( kNameSpaceID_None, nsHTMLAtoms::value, value );
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if ( res == NS_CONTENT_ATTR_HAS_VALUE )
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*outState = StringToCheckState(value);
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else
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*outState = eOff;
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printf("getting value, it is %s\n", value.ToNewCString());
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return NS_OK;
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}
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//
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// SetCurrentCheckState
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//
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// Sets the value in the DOM. 0 is off, 1 is on, 2 is mixed.
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//
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nsresult
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nsTriStateCheckboxFrame::SetCurrentCheckState(CheckState aState)
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{
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nsString valueAsString;
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CheckStateToString ( aState, valueAsString );
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printf("setting value, it is %s\n", valueAsString.ToNewCString());
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return mContent->SetAttribute ( kNameSpaceID_None, nsHTMLAtoms::value, valueAsString, PR_TRUE );
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} // SetCurrentCheckState
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//
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// MouseClicked
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//
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// handle when the mouse is clicked in the box. If the check is on or off, toggle it.
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// If the state is mixed, then set it to off. You can't ever get back to mixed.
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//
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void
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nsTriStateCheckboxFrame::MouseClicked(nsIPresContext* aPresContext)
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{
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mMouseDownOnCheckbox = PR_FALSE;
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CheckState oldState;
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GetCurrentCheckState(&oldState);
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CheckState newState = eOn;
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switch ( oldState ) {
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case eOn:
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case eMixed:
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newState = eOff;
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break;
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}
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SetCurrentCheckState(newState);
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}
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//
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// GetMaxNumValues
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//
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// Because we have a mixed state, we go up to two.
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//
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PRInt32
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nsTriStateCheckboxFrame::GetMaxNumValues()
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{
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return 2;
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}
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//
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// PaintCheckBox
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//
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// Paint the checkbox depending on the mode
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//
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void
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nsTriStateCheckboxFrame::PaintCheckBox(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer)
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{
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aRenderingContext.PushState();
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float p2t;
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aPresContext.GetScaledPixelsToTwips(&p2t);
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CheckState checked = eOff;
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// Get current checked state through content model.
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// XXX: This is very inefficient, but it is necessary in the case of printing.
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// During printing the Paint is called but the actual state of the checkbox
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// is in a frame in presentation shell 0.
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/*XXXnsresult result = */GetCurrentCheckState(&checked);
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if ( checked == eOn ) {
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// Draw check mark
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const nsStyleColor* color = (const nsStyleColor*)
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mStyleContext->GetStyleData(eStyleStruct_Color);
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aRenderingContext.SetColor(color->mColor);
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printf("painting checkbox\n");
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nsFormControlHelper::PaintCheckMark(aRenderingContext,
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p2t, mRect.width, mRect.height);
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}
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PRBool clip;
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aRenderingContext.PopState(clip);
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}
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//
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// Paint
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//
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// Overidden to handle drawing the checkmark in addition to everything else
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//
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NS_METHOD
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nsTriStateCheckboxFrame::Paint(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer)
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{
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printf("painting checkbox\n");
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// Paint the background
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nsFormControlFrame::Paint(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
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if (NS_FRAME_PAINT_LAYER_FOREGROUND == aWhichLayer) {
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// Paint the checkmark
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PaintCheckBox(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
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}
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return NS_OK;
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}
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//
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// HandleEvent
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//
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// Track the mouse and handle clicks
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//
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NS_METHOD
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nsTriStateCheckboxFrame::HandleEvent(nsIPresContext& aPresContext,
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nsGUIEvent* aEvent,
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nsEventStatus& aEventStatus)
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{
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if (nsEventStatus_eConsumeNoDefault == aEventStatus) {
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return NS_OK;
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}
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switch(aEvent->message) {
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case NS_KEY_PRESS:
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if (NS_KEY_EVENT == aEvent->eventStructType) {
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nsKeyEvent* keyEvent = (nsKeyEvent*)aEvent;
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if (NS_VK_SPACE == keyEvent->keyCode || NS_VK_RETURN == keyEvent->keyCode) {
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MouseClicked(&aPresContext);
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}
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}
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break;
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default:
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break;
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}
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// Handle GFX rendered widget Mouse Down event
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switch (aEvent->message) {
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case NS_MOUSE_LEFT_BUTTON_DOWN:
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mMouseDownOnCheckbox = PR_TRUE;
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//XXX: TODO render gray rectangle on mouse down
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break;
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case NS_MOUSE_EXIT:
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mMouseDownOnCheckbox = PR_FALSE;
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//XXX: TO DO clear gray rectangle on mouse up
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break;
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}
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return(nsFormControlFrame::HandleEvent(aPresContext, aEvent, aEventStatus));
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}
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//
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// RequiresWidget
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//
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// Tell callers that we are GFX rendered through and through
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//
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nsresult
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nsTriStateCheckboxFrame::RequiresWidget(PRBool& aRequiresWidget)
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{
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aRequiresWidget = PR_FALSE;
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return NS_OK;
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}
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//
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// StringToCheckState
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//
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// Converts from a string to a CheckState enum
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//
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nsTriStateCheckboxFrame::CheckState
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nsTriStateCheckboxFrame :: StringToCheckState ( const nsString & aStateAsString )
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{
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if ( aStateAsString == NS_STRING_TRUE )
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return eOn;
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else if ( aStateAsString == NS_STRING_FALSE )
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return eOff;
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// not true and not false means mixed
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return eMixed;
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} // StringToCheckState
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//
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// CheckStateToString
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//
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// Converts from a CheckState to a string
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//
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void
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nsTriStateCheckboxFrame :: CheckStateToString ( CheckState inState, nsString& outStateAsString )
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{
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switch ( inState ) {
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case eOn:
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outStateAsString = NS_STRING_TRUE;
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break;
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case eOff:
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outStateAsString = NS_STRING_FALSE;
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break;
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case eMixed:
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outStateAsString = "2";
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break;
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}
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} // CheckStateToString
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@ -0,0 +1,110 @@
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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//
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// nsTriStateCheckboxFrame
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//
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// A sibling of a checkbox, but with an extra state, mixed, that represents
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// something in between on and off.
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//
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// An example will explain it best. Say you
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// select some text, part of which is bold, and go to a dialog that lets you
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// customize the styles of that text. The checkboxes for each style should
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// represent the current state of the text, but what value should the "Bold"
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// checkbox have? All the text isn't bold, so it shouldn't be on, but some
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// if it is, so you want to indicate that to the user. Hence, a 3rd state.
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//
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// Clicking the control when it is mixed would uncheck the control, as if
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// it is totally off. In the above example, the entire selection would be
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// unbolded. Clicking it again would check the control and bold the entire
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// selection. Note that there is no way to get back to the mixed state. This
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// is by design. It just doesn't make any sense. What that action really means
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// would be satisfied by "Cancel" or "Undo" which is beyond the scope of
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// the control.
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//
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#ifndef nsTriStateCheckboxFrame_h__
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#define nsTriStateCheckboxFrame_h__
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#include "nsFormControlFrame.h"
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#include "prtypes.h"
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class nsIPresContext;
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class nsString;
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class nsIContent;
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class nsIAtom;
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nsresult NS_NewTriStateCheckboxFrame(nsIFrame*& aResult) ;
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class nsTriStateCheckboxFrame : public nsFormControlFrame
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{
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public:
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nsTriStateCheckboxFrame();
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NS_IMETHOD GetFrameName(nsString& aResult) const {
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return MakeFrameName("TriStateCheckboxFrame", aResult);
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}
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virtual PRInt32 GetMaxNumValues();
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// nsFormControlFrame overrides
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nsresult RequiresWidget(PRBool &aHasWidget);
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//
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// Methods used to GFX-render the checkbox
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//
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NS_IMETHOD Paint(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer);
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NS_IMETHOD HandleEvent(nsIPresContext& aPresContext,
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nsGUIEvent* aEvent,
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nsEventStatus& aEventStatus);
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//End of GFX-rendering methods
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protected:
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enum CheckState { eOff, eOn, eMixed } ;
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nsresult GetCurrentCheckState(CheckState *outState) ;
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nsresult SetCurrentCheckState(CheckState aState) ;
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virtual void MouseClicked(nsIPresContext* aPresContext);
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virtual void PaintCheckBox(nsIPresContext& aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer);
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// utility routine for converting from DOM values to internal enum
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void CheckStateToString ( CheckState inState, nsString& outStateAsString ) ;
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CheckState StringToCheckState ( const nsString & aStateAsString ) ;
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//GFX-rendered state variables
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PRBool mMouseDownOnCheckbox;
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}; // class nsTriStateCheckboxFrame
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#endif
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