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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "views/controls/resize_gripper.h"
#include "app/resource_bundle.h"
#include "base/logging.h"
#include "grit/app_resources.h"
namespace views {
const char ResizeGripper::kViewClassName[] = "views/ResizeGripper";
#if defined(OS_WIN)
static HCURSOR g_resize_cursor = NULL;
#endif
////////////////////////////////////////////////////////////////////////////////
// ResizeGripper
ResizeGripper::ResizeGripper(ResizeGripperDelegate* delegate)
: delegate_(delegate),
initial_position_(0),
gripper_visible_(false) {
ResourceBundle &rb = ResourceBundle::GetSharedInstance();
SkBitmap* gripper_image = rb.GetBitmapNamed(IDR_RESIZE_GRIPPER);
// Explicitly set the image size so that the preferred size is fixed to that
// of the image. If we didn't do this the preferred size would change
// depending upon whether the gripper was visible.
SetImageSize(gfx::Size(gripper_image->width(), gripper_image->height()));
}
ResizeGripper::~ResizeGripper() {
}
std::string ResizeGripper::GetClassName() const {
return kViewClassName;
}
gfx::NativeCursor ResizeGripper::GetCursorForPoint(Event::EventType event_type,
const gfx::Point& p) {
if (!enabled_)
return NULL;
#if defined(OS_WIN)
if (!g_resize_cursor)
g_resize_cursor = LoadCursor(NULL, IDC_SIZEWE);
return g_resize_cursor;
#elif defined(OS_LINUX)
return gdk_cursor_new(GDK_SB_H_DOUBLE_ARROW);
#endif
}
void ResizeGripper::OnMouseEntered(const views::MouseEvent& event) {
SetGripperVisible(true);
}
void ResizeGripper::OnMouseExited(const views::MouseEvent& event) {
SetGripperVisible(false);
}
bool ResizeGripper::OnMousePressed(const views::MouseEvent& event) {
if (!event.IsOnlyLeftMouseButton())
return false;
// The resize gripper obviously will move once you start dragging so we need
// to convert coordinates to screen coordinates so that we don't loose our
// bearings.
gfx::Point point(event.x(), 0);
View::ConvertPointToScreen(this, &point);
initial_position_ = point.x();
return true;
}
bool ResizeGripper::OnMouseDragged(const views::MouseEvent& event) {
if (!event.IsLeftMouseButton())
return false;
ReportResizeAmount(event.x(), false);
return true;
}
void ResizeGripper::OnMouseReleased(const views::MouseEvent& event,
bool canceled) {
if (canceled)
ReportResizeAmount(initial_position_, true);
else
ReportResizeAmount(event.x(), true);
SetGripperVisible(HitTest(event.location()));
}
bool ResizeGripper::GetAccessibleRole(AccessibilityTypes::Role* role) {
DCHECK(role);
*role = AccessibilityTypes::ROLE_SEPARATOR;
return true;
}
void ResizeGripper::ReportResizeAmount(int resize_amount, bool last_update) {
gfx::Point point(resize_amount, 0);
View::ConvertPointToScreen(this, &point);
resize_amount = point.x() - initial_position_;
if (base::i18n::IsRTL())
resize_amount = -1 * resize_amount;
delegate_->OnResize(resize_amount, last_update);
}
void ResizeGripper::SetGripperVisible(bool visible) {
if (visible == gripper_visible_)
return;
gripper_visible_ = visible;
if (gripper_visible_) {
ResourceBundle& rb = ResourceBundle::GetSharedInstance();
SkBitmap* gripper_image = rb.GetBitmapNamed(IDR_RESIZE_GRIPPER);
SetImage(gripper_image);
} else {
SetImage(NULL);
}
}
} // namespace views
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